Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear

Transcription

1 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Class 6055 Instruction Bulletin /2012 Retain for future use.

2 Hazard Categories and Special Symbols Read these instructions carefully and look at the equipment to become familiar with the device before trying to install, operate, service or maintain it. The following special messages may appear throughout this bulletin or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure. The addition of either symbol to a Danger or Warning safety label indicates that an electrical hazard exists which will result in personal injury if the instructions are not followed. This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. DANGER DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury. WARNING WARNING indicates a hazardous situation which, if not avoided, can result in death or serious injury. CAUTION CAUTION indicates a hazardous situation which, if not avoided, can result in minor or moderate injury. NOTICE NOTICE is used to address practices not related to physical injury. The safety alert symbol is not used with this signal word. Please Note NOTE: Provides additional information to clarify or simplify a procedure. Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material.

3 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Table of Contents Table of Contents Introduction... 7 Product Overview... 8 Front Section with Secondary Control Devices... 8 Circuit Breaker Compartment... 9 Circuit Breaker Positioning Rails... 9 Racking Mechanism... 9 Secondary Disconnect Receptacle... 9 Racking Position Indicator Primary Contacts Current Transformer Ground Contact Bar Mechanism Operated Contacts (Optional) Truck Operated Contacts (Optional) Interlocks Voltage Transformer and Control Power Transformers Fuse Drawout Units Main Bus Compartment Cable Compartment Surge Arresters Safety Precautions Receiving, Handling, and Storage Receiving Handling Storage Site Selection and Preparation Foundation Conduit Location Installation Switchgear Installation Pre-Installation Procedures Installation Main Bus Installation Bus Bar Installation Circuit Breaker Installation Installing the Circuit Breaker into the TEST/DISCONNECT Position. 24 Testing the Circuit Breaker in the TEST/DISCONNECT Position.. 25 Racking the Circuit Breaker into the CONNECTED Position Circuit Breaker Removal Racking the Circuit Breaker Out of the CONNECTED Position Removing the Circuit Breaker from the Circuit Breaker Compartment 28 Locking Provisions Voltage Transformer Drawout Unit Inspection Racking the Voltage Transformer Drawout Unit Out of the CONNECTED Position Inspecting the Fuses Racking the VT Drawout Unit into the CONNECTED Position Voltage Transformer Drawer Voltage Transformer Drawer Interlocks Voltage Transformer Drawer Characteristics Voltage Transformer Drawer Wiring High-Potential Testing Test Preparation Phase-to-Phase Test Phase-to-Ground Test Phasing Cable Connections Schneider Electric All Rights Reserved 3

4 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Table of Contents 06/2012 Insulating the Cable Connections Operation...35 Start-Up...35 Preliminary Start-Up Procedures Installing and Testing Circuit Breakers in the TEST/DISCONNECT Position Operation...36 Energizing the Switchgear...36 Removing Circuit Breakers...36 Inspection and Maintenance...37 Main Bus Compartment...37 Replacing the Fuses...38 Re-Energizing...38 Accessories...39 Using the Lift Truck...39 Test Cabinet (Optional)...40 Ground and Test Devices...40 Arc Exhausting Systems...41 Plenum Assembly...41 Installing the Plenum Assembly Arc Shield Assembly...45 Installing the Arc Shield Assembly Configuration Drawings...48 Installation and Maintenance Log Schneider Electric All Rights Reserved

5 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 List of Figures List of Figures Figure 1: Masterclad Indoor Arc Resistant Switchgear with Type VR Drawout Circuit Breaker... 7 Figure 2: Typical Front Section... 8 Figure 3: Circuit Breaker Compartment... 9 Figure 4: Mechanism Operated Contacts Figure 5: Truck Operated Contacts Figure 6: Drawout Voltage Transformer Figure 7: Bus Compartment Figure 8: Lifting Sling Figure 9: Typical Floor Plan (Not for Construction) Figure 10: Section Bolting Details Figure 11: Typical Main Bus Assembly (1200 A shown) Figure 12: Main Bus Connections, Side View Figure 13: Main Bus Connections, Top View Figure 14: Bus Compartment with Bus Cover Removed Figure 15: Glass Polyester Pass-through Figure 16: Door Handle Positions Figure 17: Inserting Circuit Breaker with a Lift Truck Figure 18: Masterclad Switchgear Circuit Breaker Compartment Figure 19: Test and Connected Position Arrows Figure 20: Circuit Breaker Secondary Disconnect (Male) Figure 21: Secondary Disconnect Handle and Connector Figure 22: Racking Handle Engaged onto Racking Shaft with Circuit Breaker in the TEST/DISCONNECT Position Figure 23: Removing the Circuit Breaker from the Compartment Figure 24: Devices That Can Be Padlocked Figure 25: Racking Handle Engaged onto Racking Shaft Figure 26: VT Drawer Compartment Figure 27: VT Drawer Door Latched Figure 28: VT Racking Handle Inserted Figure 29: Voltage Transformer Drawer in Withdrawn Position Figure 30: Voltage Transformer Wiring Figure 31: Power Cable Connection Insulation Figure 32: Typical Lift Truck Figure 33: Wall-Mounted Test Cabinet (Optional) Figure 34: Typical Indoor Plenum Application Figure 35: Plenum Assemblies Figure 36: Prepared Roof Detail Plenum (Lefthand and Righthand End Bays) Figure 37: Plenum Installation Detail Figure 38: Typical Arc Shield Application Figure 39: Arc Shield Assemblies Figure 40: Prepared Roof Detail Arc Shield (Lefthand and Righthand End Bays) Figure 41: Arc Shield Installation Detail Figure 42: Masterclad Arc Resistant Metal-Clad Indoor Switchgear Configurations Schneider Electric All Rights Reserved 5

6 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear List of Tables 06/2012 List of Tables Table 1: Approximate Switchgear and Component Weights Table 2: Bolt Torque Table 3: One Minute Hi-Potential Test Table 4: Minimum Required Ceiling Height from Floor Schneider Electric All Rights Reserved

7 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Introduction Introduction This instruction bulletin contains instructions for receiving, handling, storing, installing, operating, and maintaining Masterclad 5 15 kv arc resistant metal-clad indoor switchgear. This equipment is manufactured by Schneider Electric under the brand name Square D. This equipment is designed for use with Type VR drawout circuit breakers. The arc resistant design is one-high and two-high, with circuit breakers on the top and bottom and an auxiliary compartment with controls on the top. NOTE: For information on Type VR circuit breakers, refer to instruction bulletins and The switchgear assembly (Figure 1) consists of individually-grounded steel compartments. Each compartment has doors, barriers, and removable access panels to isolate the separate working functions. Exhaust vents are located at the top of each compartment, except for the auxiliary compartment. All of the circuit breakers, instrument and control power transformers, relays, meters, and other components are factory assembled, wired, and tested as an assembly. The installer normally makes only the external control, ground, and power connections at the terminals provided, and reconnects the wiring and bus bars at the shipping breaks. Each assembly is custom designed, with standard structures and bus configurations arranged according to customer specifications. The structures are then combined with the circuit breaker and other components necessary for the required protective scheme, metering, and number of feeders. Complete customer drawings are furnished for each Masterclad switchgear assembly. The drawings include floor plans and elevations, one-line diagrams, bills of material, control schematics, and wiring diagrams. Figure 1: Masterclad Indoor Arc Resistant Switchgear with Type VR Drawout Circuit Breaker Schneider Electric All Rights Reserved 7

8 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Introduction 06/2012 Product Overview Masterclad arc resistant metal-clad indoor switchgear is UL/cUL certified. A Masterclad arc resistant switchgear line-up assembly consists of individual switchgear bays bolted together. The number of bays in an assembly depends on customer specifications. Each switchgear bay is a separate, rigid, self-contained structure made of 10-gauge steel. A switchgear bay typically consists of: Front section Circuit breaker compartments (upper and lower) Auxiliary compartment with controls and door-mounted components (upper) Section with secondary control devices Main bus compartment Cable compartment Front Section with Secondary Control Devices The front section upper compartment includes front, hinged doors with instruments, relays, control switches, terminal blocks, fuse blocks, and other required secondary control devices. The wiring space for inter-unit connection and the customer control wiring connection is also included in the front section. Figure 2: Typical Front Section Schneider Electric All Rights Reserved

9 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Introduction Circuit Breaker Compartment Figure 3: Circuit Breaker Compartment The circuit breaker compartment contains separate, but coordinated, features (Figure 3). Shutter actuator Racking arm Circuit breaker positioning rails Position latch brackets Ground bar Racking block lever Primary bushing assemblies (shutters open) Primary high voltage contacts Racking position indicator Ground & test/removable shorting device interlock Secondary disconnect handle Secondary disconnect receptacle Racking mechanism Compartment rating interlock Racking block bar (welded to racking shaft) Racking shaft Racking mechanism lockout provision (key interlock and padlock) Circuit Breaker Positioning Rails Racking Mechanism Secondary Disconnect Receptacle Positioning rails (Figure 3), mounted on the side walls of the circuit breaker compartment, capture and align the rollers on the circuit breaker to guide the breaker into the circuit breaker compartment. The racking mechanism (Figure 3) is located on the circuit breaker compartment floor. It is operated by a removable racking handle inserted into the front of the circuit breaker compartment so that it can be racked, only with the door closed. The circuit breaker is engaged by a gear-driven racking arm (Figure 3). As the arm rotates, it moves the circuit breaker into or out of the TEST/DISCONNECT or the CONNECTED position. The secondary disconnect receptacle (Figure 3) is located on the lower right floor of the compartment. The molded insulating receptacle contains 24 contacts and two tapered guide pins. Control power can be connected in the test position by rotating the secondary disconnect handle and pulling it forward (Figure 3). The breaker compartment door must be opened to Schneider Electric All Rights Reserved 9

10 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Introduction 06/2012 access the secondary disconnect handle. The door can be closed after the receptacle is connected to the breaker. Racking Position Indicator The racking position indicator, located beside the racking port (Figure 3 on page 9), indicates if the circuit breaker is in either the TEST/DISCONNECT, TRANSPORT, or CONNECTED position, and whether the shutters are closed or opened. When the door is open, two arrows that line up with the front cover are visible on the left rail and indicate the position of the circuit breaker. Primary Contacts Current Transformer Ground Contact Bar Mechanism Operated Contacts (Optional) The primary contacts are housed in primary bushing assemblies (Figure 3 on page 9) that are covered at the open end by the shutter when the circuit breaker is in the TEST/DISCONNECT position. Front-accessible, window-type, 600 V rated single- or multi-ratio current transformers are located around either the line or load primary voltageinsulated bushings. A maximum of two current transformers, depending on accuracy, can be mounted per phase two on the line, and two on the load. A ground bar (Figure 3 on page 9), located on the circuit breaker compartment floor, is directly connected to the main ground bus. Sliding contact fingers, located on the underside of the circuit breaker, engage before the circuit breaker reaches the TEST position and remain continuously grounded. Mechanism operated contacts are compartment-mounted auxiliary contacts that are operated by the circuit breaker mechanism (Figure 4). Like circuit breaker mounted auxiliary contacts, they indicate whether the circuit breaker is in the OPEN or CLOSED position. They operate in the CONNECTED and TEST/DISCONNECTED positions (unless specified for CONNECTED only). Refer to the customer order drawings shipped with the equipment. NOTE: The NORMALLY-OPEN A contacts and the NORMALLY-CLOSED B contacts furnished are not convertible. The mechanism operated contacts unit is mounted inside the front section of the circuit breaker compartment. It is operated by a mechanism that is driven vertically by a roller on the left side of the circuit breaker. The switch is located inside the breaker compartment. Figure 4: Mechanism Operated Contacts Contact actuator Truck Operated Contacts (Optional) The truck operated contacts (Figure 5 on page 11) indicate whether the circuit breaker is in the CONNECTED or TEST/DISCONNECT position in the circuit breaker compartment Schneider Electric All Rights Reserved

11 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Introduction The truck operated contacts unit does not distinguish between the circuit breaker being in the TEST/DISCONNECT position or withdrawn completely from the compartment. The truck operated contacts unit is mounted on the right side of the horizontal steel barrier in the top of the circuit breaker compartment. The switch is located inside the breaker compartment. It is operated by a spring-loaded lever. This lever is activated, just before the circuit breaker reaches the connected position, by a pin on the upper right side circuit breaker frame. Figure 5: Truck Operated Contacts Contact actuator Interlocks CAUTION HAZARD OF EQUIPMENT DAMAGE Do not test interlocks by hand. Test interlocks by moving the circuit breaker over the compartment-mounted operating cams. Operate interlocks in the correct sequence. Failure to follow these instructions can result in injury or equipment damage. The circuit breaker compartment contains the following interlocks: A racking block bar (Figure 3 on page 9) welded to the racking shaft will hit an interlock pin on the circuit breaker when it is closed. This interlock mechanism will stop a closed circuit breaker from being racked into or out of the circuit breaker compartment. The racking arm actuates an interlock located underneath the circuit breaker. This interlock mechanism is designed to stop a circuit breaker from being closed when it is between the TEST/DISCONNECTED and CONNECTED positions. A racking block lever (Figure 3 on page 9) will not allow racking mechanism operation when the circuit breaker is not in the circuit breaker compartment. The shutter cannot be opened unless the circuit breaker is in the circuit breaker compartment. A racking mechanism lockout provision (Figure 3 on page 9) is furnished in each compartment for locking circuit breakers or voltage transformer (VT) drawout units out of the CONNECTED position. The racking mechanism lockout provision is located in the center of the compartment floor and has standard padlock provisions. It can be equipped with a key interlock when specified by the customer. The racking mechanism lockout prevents the racking of circuit breakers or VT drawout units Schneider Electric All Rights Reserved 11

12 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Introduction 06/2012 when they are in the DISCONNECTED position. Circuit breakers or VT drawout units can be stored in the DISCONNECTED position with the racking mechanism locked. The racking mechanism is not functional if the breaker compartment door is opened. The circuit breaker compartment door can not be opened if the breaker or VT drawout units are not in the DISCONNECTED position.the compartment rating interlocks (Figure 3 on page 9) stop accidental insertion of circuit breakers with incorrect current, voltage, or interrupting ratings into the compartment. The stationary interference brackets are mounted on the floor of the compartment and the mating part of the interlock system is mounted on the underside of each circuit breaker. Each circuit breaker compartment may have permissive interlocks (Figure 3 on page 9) that will prevent the insertion of a G&T or an RS device not intended for use in that circuit breaker compartment. The permissive interlocks are located beside the compartment rating interlock on the circuit breaker compartment floor. Refer to the specific Schneider Electric G&T and RS device instruction bulletin(s). Voltage Transformer and Control Power Transformers Fuse Drawout Units The voltage transformer (VT) and control power transformers (CPT) fuse drawout units are self-contained drawers. As the drawout units are racked into the compartments, the drawers roll on two positioning rails mounted on the sides of the compartment. The rails capture and align rollers on drawout units. Figure 6: Primary fuses Drawout Voltage Transformer Floating, drawer-mounted, self-aligning contacts engage the stationary primary contacts as the drawer is racked into the connected position. A sliding contact finger, located on the bottom right side of the drawout unit, engages the ground bar when the drawout unit is in the DISCONNECTED position and remains continuously grounded. A static discharge ground contact, mounted in the top of the compartment, grounds the primary contacts in the withdrawn position. Control power transformers are stationary mounted or truck mounted, as needed. Depending on the size of the transformer, they can be mounted remotely or within the switchgear. Drawout voltage transformers (Figure 6) supply voltage indication for metering and relaying purposes. Primary current limiting fuses are mounted on each voltage transformer. When drawout voltage transformers are in the CONNECTED position the secondary contacts, mounted on the bottom middle of the drawer, engage fixed compartment floor-mounted secondary contacts. Secondary fuses for the voltage transformers are located in the front control compartment. Refer to the customer order drawings shipped with the equipment Schneider Electric All Rights Reserved

13 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Introduction Main Bus Compartment The main bus compartment is located in the center of the switchgear unit. It is isolated from other compartments by metal plates and is accessible by removing the metal access plate (Figure 7) located between the main bus compartment and the load compartment. Figure 7: Bus Compartment Pressure relief flaps Main bus compartment Pressure relief flaps Entry to main bus compartment Main bus access plates Circuit breaker compartments Cable compartment Each busbar has epoxy insulation rated for 221 F (105 C) operation heat shrink coating is optional. Glass polyester pass-throughs are used to separate the bus compartments between adjacent circuit breaker compartments. NOTE: The busbar insulation must not be damaged or modified. Boots must be in place before operating the equipment. Bus boots insulate the connection in the main bus compartment, overlapping the epoxy insulation on the busbars. The busbar insulation and boots form an integral insulating system for the equipment to meet its dielectric ratings Schneider Electric All Rights Reserved 13

14 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Introduction 06/2012 Cable Compartment The cable compartment is accessible by opening the rear door on the back of the equipment. The load connectors are punched for terminating two cables per phase with a NEMA two-hole pattern standard. Schneider Electric will provide lugs, upon request. For 15 kv, interphase barriers will be installed if insulating boots are not required by customer on cable connections. Tape and associated material for insulating cable terminations are not supplied. A ground bus in the cable compartment has lugs on each end for the assembly ground. This ground bus is connected to each circuit breaker compartment ground contact bar and to the individual ground bars in each cable compartment. All instrument transformer, metering, and relaying grounds are also connected to this common ground system. The dimensions of a typical ground bus cross section are: 0.25 x 2.0 in. (6 x 51 mm) for switchgear up to 50 ka 0.5 x 2.0 in. (13 x 51 mm) for 63 ka switchgear Conduit must enter the cable compartments, in the areas shown on the customer drawings (Figure 9 on page 18), from either the top or bottom of the cable compartment. Conduit should be stubbed in the concrete pad as part of the site preparation before the assembly is installed, but top entrance conduit must be installed after the assembly is in place. The top and bottom covers can be removed, punched to fit the conduit, and put back in place. When required, zero-sequence current transformers are conveniently located in the cable compartment. Various cable termination systems are used. These are detailed on the customer s plans and specifications. Solderless or compression lugs can be supplied on the load connectors. Potheads can be supplied as an option. Tape and insulating material necessary for completing the field connection at the lug pad are not supplied with the assembly. Surge Arresters Surge arresters are furnished only when listed in the user s specifications. When specified, surge arresters are mounted in the incoming and outgoing cable compartments Schneider Electric All Rights Reserved

15 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Safety Precautions Safety Precautions This chapter contains important safety precautions that must be followed before attempting to install, service, or maintain electrical equipment. Carefully read and follow the safety precautions outlined below. DANGER HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E and CSA Z462. Only qualified personnel familiar with medium voltage equipment are to perform work described in this set of instructions. Workers must understand the hazards involved in working with or near medium voltage circuits. Perform such work only after reading and understanding all of the instructions contained in this bulletin. Turn off all power supplying this equipment before working on it. Always use a properly rated voltage sensing device to confirm that power is off. Before performing maintenance on this device, disconnect all sources of electric power. Assume all circuits are live until they are completely de-energized, tested, grounded, and tagged. Pay particular attention to the design of the power system. Consider all sources of power. Check interconnection diagrams and make sure there are no backfeed potential sources. Never disconnect the main trip source of energized equipment. Place the circuit breaker in the TEST/DISCONNECTED position before attempting to open the circuit breaker door. Handle this equipment carefully and install, operate, and maintain it correctly in order for it to function properly. Neglecting fundamental installation and maintenance requirements may lead to personal injury, as well as damage to electrical equipment or other property. Do not make any modifications to the equipment or operate the system with interlocks and safety barriers removed. Contact your local Schneider Electric representative for additional instructions if the equipment does not function as described in this manual. Use out-of-service tags and padlocks when working on equipment. Leave tags in place until the work is completed and the equipment is ready to be put back into service. The complete assembly arrangement determines if the top or bottom contacts are the line side; both can be energized when the circuit breaker is removed from the compartment. Disconnect all sources of power to the switchgear before accessing the horizontal bus compartment. All breaker and auxiliary doors must be latched and all cable compartment doors must be bolted to maintain arc resistance. Carefully inspect your work area and remove any tools and objects left inside the equipment before energizing the switchgear. Replace all devices, doors, and covers before connecting the power to this equipment. All instructions in this manual are written with the assumption that the customer has taken these measures before performing maintenance or testing. Failure to follow these instructions will result in death or serious injury Schneider Electric All Rights Reserved 15

16 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Receiving, Handling, and Storage 06/2012 Receiving, Handling, and Storage Receiving This section contains instructions for receiving, handling, and storing the Masterclad arc resistant metal-clad switchgear. This section also covers site selection and preparation, foundation specifications, and locating conduit. Masterclad arc resistant metal-clad switchgear is shipped in protective crates or wrapping. Circuit breakers are shipped on pallets. Upon receipt, compare the packing list to the equipment received to ensure that the order and shipment are complete. Claims for shortages or errors must be made in writing to Schneider Electric within 60 days of delivery. Failure to give such notice will constitute unqualified acceptance and a waiver of all such claims by the purchaser. Immediately inspect the equipment for any damage that may have occurred in transit. If damage is found or suspected, file a claim with the carrier immediately and notify Schneider Electric. Delivery of equipment to a carrier at any of the Schneider Electric plants or other shipping point constitutes delivery to the purchaser regardless of freight payment and title. All risk of loss or damage passes to the purchaser at that time. Handling CAUTION HAZARD OF EQUIPMENT DAMAGE OR INJURY If moving by crane, the interior angle of the lifting sling should not exceed 90. Angles greater than 90 apply greater inward pressure of lifting lugs which can damage or dislodge lifting lugs from switchgear. Failure to follow these instructions can result in injury or equipment damage. The switchgear is shipped in sections of one or two bays. Each shipping section has four lifting eyes bolted onto the top. NOTE: If using the plenum option, do not install until the switchgear is moved to installation location. Refer to Plenum Assembly on page 41 for additional information. Put a crane hook through each of the four lifting eyes (Figure 8) to lift and move the sections. Use load-rated cables or chains with safety hooks or shackles. A spreader bar may be necessary to maintain proper angles for lifting. Figure 8: Lifting Sling Interior angle Safety hooks Lifting eyes Equipment top To prevent structural damage, rig the lifting sling so that the minimum angle between lifting cables or chains and the top of the equipment is 45, and the maximum interior angle is 90. If a crane is not available, contact Schneider Electric before using any other lifting method. After the equipment has been placed in position, remove and discard the lifting eyes. Screw the bolts back into place to cover the mounting holes Schneider Electric All Rights Reserved

17 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Receiving, Handling, and Storage Storage DANGER HAZARD OF ELECTRICAL SHOCK, EXPLOSION, OR ARC FLASH When energizing space heaters from a remote source, remove the primary current limiting fuses of the control power transformer. Site Selection and Preparation Failure to follow this instruction can result in death or serious injury. Keep equipment in a clean, dry, well-ventilated area. Circuit breakers should be protected from dust, foreign objects, and rodents. If space heaters are furnished in the assembly, energize them from an external source. Refer to schematic and wiring diagrams for a logical connection point, and for voltage and power requirements. NOTE: If the space heaters are normally energized from a control power transformer, open the control power transformer secondary circuit breaker, remove the primary current limiting fuses, and install an out-of-service tag before energizing the space heaters. This prevents backfeed to the main bus through the control power transformer. If space heaters are not installed in the assembly, and the area is cold and damp, use a temporary heating source within the assembly. A minimum of 200 watts of heat per compartment is recommended. Avoid greasy, smoky heaters that can deposit carbon on insulation, causing tracking and eventual insulation breakdowns. DANGER HAZARD OF EXPLOSION OR ARC FLASH Do not install the equipment beneath catwalks or other elevated personnel access routes. Maintain a minimum overhead clearance of 10 ft. (3 m). Install the equipment in an area that allows for forced ventilation to outside air. Failure to follow these instructions will result in death or serious injury. Table 1: Approximate Switchgear and Component Weights Switchgear and Components Weight Switchgear unit (one-high applications) 3500 lb (1591 kg) Switchgear unit (two-high applications) 4300 lb (1951 kg) Circuit breaker 1200 A, 40 ka 380 lb (170 kg) Circuit breaker 1200 A, 50 ka 430 lb (195 kg) Circuit breaker 2000 A, 40 ka 450 lb (205 kg) Circuit breaker 2000 A, 50 ka 500 lb (225 kg) Circuit breaker 3000 A, 50 ka 700 lb (320 kg) Circuit breaker 1200, 2000, 3000 A, 63 ka 800 lb (363 kg) VT drawout fuse unit (2) 15 kv 210 lb (95 kg) 3 intermediate arresters 15 kv 120 lb (55 kg) Proper site selection is essential for reliable operation of the assembly. Carefully compare the plans and specifications with the customer drawings provided. Provide adequate ventilation at all times so the ambient temperature around the assembly does not exceed 104 F (40 C). If the ambient temperature exceeds 104 F (40 C), you will need to de-rate the equipment. Clean, dry, filtered air should be supplied. Provide adequate lighting in both the front and back aisle spaces. Also, provide convenient outlets in both areas for electrical hand tool use. Provide adequate floor drainage. Provide adequate safeguards against water damage. Route sewer, water, and steam lines so they do not pass over or near the assembly dripping liquids may damage the insulation. Make sure the site can support the weight of the complete switchgear unit. Refer to Table 1 to determine switchgear and component weights for handling and other structural considerations Schneider Electric All Rights Reserved 17

18 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Receiving, Handling, and Storage 06/2012 Foundation The switchgear is designed to be mounted on the supplied base, leveled to the specifications in the supplied base plan drawing, and grouted in the concrete pad. NOTE: Typically, a minimum of 3 ft. (1 m) is necessary on the left, right, and rear of the line-up and 6 ft. (1.8 m) on the front side for door clearance when removing the circuit breaker. Figure 9 illustrates the typical floor plan. Refer to the customer order drawings before using the typical foundation specifications. NOTE: For users in Mexico, an optional floor plan is available for 1200 A. Review the complete customer drawing for each Masterclad assembly. Figure 9: Typical Floor Plan (Not for Construction) 72.0 (1829) Front Aisle 1.0 (25) 1.0 (25) 5.8 (146) 6.5 (165) 47.6 (1209) 1.5 (38) 4.5 (114) 94.0 (2388) 5.1 (130) 44.4 (1128) 3.0 (76) 1.0 (25) 6.9 (175) 36.0 (914) Rear Aisle 1.0 (25) Front 34.0 (864) 2.0 (51) 2.0 (51) Control conduit area (bottom) 27.0 (686) 25.8 (654) 10.0 (254) (406) (864) 10.0 (254) Rear 1.0 (25) 0.5 (12) door 5.8 (146) 6.5 (165) 1.5 (38) 4.5 (114) 5.1 (130) 9.0 (229) 6.1 (155) Six 0.50 in. (12.7 mm) diameter mounting holes 1.0 (25) Top or bottom conduit area Bottom conduit area Conduit Location Conduits should be stubbed a maximum of 1 in. (25 mm) above floor steel. Conduit placement should be very accurate to ensure that there is no mechanical interference with the switchgear floor steel. Avoid continuous loops of reinforcing rod or structural steel around any single-conductor of a three-phase power circuit Schneider Electric All Rights Reserved

19 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Installation Installation Switchgear Installation Pre-Installation Procedures This section contains instructions for installing the Masterclad arc resistant metal-clad indoor switchgear assembly. This section contains instructions for installing the switchgear. 1. The switchgear may be shipped in one or more shipping sections. Review the assembly drawings to verify that switchgear sections will be assembled in the correct order. 2. Verify that the conduit placement on the foundation is accurate according to customer drawings. Error in conduit placement may prohibit the proper installation of switchgear as described in this section (see the note below). 3. Sweep the pad and remove debris before installing any sections. Installation NOTE: When more than two shipping sections are involved, any error in conduit location can cause a cumulative error significant enough to prohibit the proper installation by the assembly sequence described in this section. To lessen cumulative error, unload and install the center shipping section first and work toward either end. 1. Move the sections into place. Install the end shipping section that allows the most maneuverability first. 2. Before proceeding, verify: The conduits are in the center of the cutouts. The back of the unit is perpendicular to the pad and has proper clearance. The mounting holes line up with the mounting channels. 3. Move an adjacent switchgear shipping section into place. 4. Verify that the switchgear sections are level, aligned, and fit snugly together. If the sections do not fit properly, lift the most recently placed section by crane, remove any obstructions, and re-install. 5. Bolt switchgear shipping sections together. See Figure 10 for bolt sizes and locations. Figure 10: Section Bolting Details 3/8-16 x 6-in. screws (20 supplied) 3/8-16 x 1.5-in. screws (6 supplied) Schneider Electric All Rights Reserved 19

20 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Installation 06/2012 NOTE: All shipping sections must be bolted together in place before bolting them to the channel sills or installing the horizontal main bus. 6. Repeat steps 4 5 for additional switchgear shipping sections. 7. Verify that all switchgear shipping sections are in the correct position according to the job drawing after all sections are bolted together. 8. Bolt the switchgear to the pad (front, center, and rear) using 1/2-13 SAE Grade 5 bolts with Belleville washers (Figure 9 on page 18). Use nuts with spring washer or tap in the pad to 1/2-13. Use six bolts per cell. Main Bus Installation A typical main bus assembly is shown in Figure 11 below. Figure 12 shows the side view of the assembly and the general arrangement of the main bus and riser. Figure 13 shows the bus connections and orientation of the filler and splice plates. See Figure 7 on page 13 for main bus access details. Figure 11: Typical Main Bus Assembly (1200 A shown) End Right Standard End Left A Front Rear B C Side View 1200 A Rear View Bus Covers Removed Schneider Electric All Rights Reserved

21 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Installation Figure 12: Main Bus Connections, Side View 1/4 x 6 Bus splice 1/4 x 6 Filler 1/4 x 6 Main bus 1/4 x 6 Bus splice 1/4 x 6 Filler (2) 1/4 x 6 Main bus 1/4 x 6 Bus splice (2) 1/4 x 6 Riser (2) 1/4 x 6 Filler (2) 1/4 x 6 Main bus 1/4 x 6 Bus splice (3) 3/8 x 6 Riser (3) 3/8 x 6 Filler (2) 3/8 x 6 Main bus 1/4 x 6 Bus splice (2) 1/4 x 6 Riser 1/4 x 6 Riser 1/4 x 6 (2) 1/4 x 6 1/8 x 6 Riser Filler Bus splice 1200 A Riser 1200 A Riser 2000 A Riser 3000 A Riser 2000 A Riser 1200 A Riser 1200 A Main 2000 A Main 2000 A Main Bus 3000 A Main 3000 A Main Bus 3000 A Main Bus 1/4 x 6 Filler (2) 3/8 x 6 Main bus 1/4 x 6 Filler 1/4 x 6 Bus splice (2) 1/4 x 6 Riser (2) 3/8 x A Riser 1200 A Riser Filler 3000 A Main Bus 3000 A Main Bus (2) 3/8 x 6 Main bus (2) 3/8 x 6 1/4 x 6 Bus splice (2) 3/8 x A Riser Main bus 1200 A Riser Main bus 1/4 x 6 Bus splice 1/4 x 6 Riser 1/8 x 6 1/4 x 6 (2) 3/8 x 6 Riser Filler Riser 3/8 x 6 Filler (2) 3/8 x 6 Filler Figure 13: Main Bus Connections, Top View 1/2-13 Hardware with typical Belleville washers Riser bus Main bus and filler 1/2-13 Hardware with typical Belleville washers Riser bus Main bus and filler 1/2-13 Hardware with typical Belleville washers Riser bus Main bus and filler Bus splice Bus splice Bus splice Typical Standard Bay 3000 A Main Bus 3000 A Riser Typical Standard Bay 2000 A Main Bus 2000 A Riser Typical Standard Bay 1200 A Main Bus 1200 A Riser Schneider Electric All Rights Reserved 21

22 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Installation 06/2012 Bus Bar Installation Follow the instructions in this section to install bus bars. DANGER HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E and CSA Z462. Turn off all power supplying this equipment before working on it. Before performing maintenance on this device, disconnect all sources of electric power. Assume all circuits are live until they are completely de-energized, tested, grounded, and tagged. Pay particular attention to the design of the power system. Consider all sources of power. Check interconnection diagrams and make sure there are no backfeed potential sources. Always use a properly rated voltage sensing device to confirm that power is off. Failure to follow this instruction will result in death or serious injury. 1. Remove the main bus covers. Figure 14 shows a bus compartment with the cover removed. Figure 14: Bus Compartment with Bus Cover Removed Riser bus bars 2. Install one phase at a time by sliding the horizontal bus bars through the glass polyester pass-throughs. There is one pass-through per section installed on the right wall (see Figure 15). Figure 15: Glass Polyester Pass-through Glass polyester pass-through Schneider Electric All Rights Reserved

23 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Installation Table 2: Bolt Size 1/4 20 5/ /8 16 1/2 13 Bolt Torque Mechanical Joints 4 7 lb-ft ( N m) lb-ft ( N m) lb-ft ( N m) lb-ft ( N m) Bus Bar Connections lb-ft ( N m) lb-ft ( N m) 3. Loosely bolt the horizontal bus to the vertical bus. NOTE: Do not bend or force the bus bars to make this connection. The through bushings and the divided insulating barrier may be loosened if necessary. They have sufficient clearance and adjustment to allow for minor field misalignment of shipping sections. 4. Tighten the bolts connecting the bus joints only after all three horizontal bus bars are in place and properly aligned. Using a torque wrench, tighten bolts for bus bar connections in accordance with Table Install supplied boots on busbar joints. Close the boot joint with supplied tie-wrap. Reinstall main bus cover. Circuit Breaker Installation This section describes the installation of the circuit breaker. WARNING HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E and CSA Z462. Only qualified personnel familiar with medium voltage circuits and equipment should operate this equipment. Check the customer order drawings and nameplates on the circuit breaker compartment to verify that the circuit breaker is installed into the proper circuit breaker compartment. Failure to follow these instructions can result in death or serious injury. Figure 16: Door Handle Positions The door handle (Figure 16) is the key to opening and closing the circuit breaker door. The door handle has three positions (described below): OPEN, READY-TO-CLOSE, and LATCH. OPEN READY-TO-CLOSE LATCH OPEN Position where the door handle can be used to open the door. Rotate the handle towards the OPEN position then pull to open the door. When the handle is released after opening the door, it will automatically go to the READY-TO-CLOSE position. READY-TO-CLOSE Position of the handle used to close the circuit breaker door. When closed, the door will remain closed but the latching feature is not active. In the READY-TO-CLOSE position, the arc resistant feature of the breaker door is not active. LATCH Position of the handle in normal operation of the switchgear. The door is closed and latched. In the LATCH position, the arc resistant feature is active. The handle can be padlocked in the LATCH position Schneider Electric All Rights Reserved 23

24 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Installation 06/2012 Installing the Circuit Breaker into the TEST/DISCONNECT Position Figure 17: Inserting Circuit Breaker with a Lift Truck 1. Check the customer order drawings and the nameplates on the circuit breaker compartment to verify that the circuit breaker is installed into the proper circuit breaker compartment. 2. Verify that the racking position indicator (Figure 18 on page 24) reads TEST/DISCONNECT. 3. To open the circuit breaker compartment door: a. Remove the padlock (if installed) from the door handle. b. Rotate the door handle to the OPEN position then pull to open the door. c. Release the door handle; it will automatically move to the READY-TO-CLOSE position. Use the supplied ramp or lift truck (as shown in Figure 17) to insert the circuit breaker into the circuit breaker compartment. (A lift truck must be used to insert the circuit breaker into switchgear on a raised pad.) For instructions on using a lift truck, refer to Using the Lift Truck starting on page 39. WARNING HAZARD OF PERSONAL INJURY A lift truck supplied by the manufacturer must be used to install a circuit breaker into switchgear on a raised pad. Failure to follow this instruction can result in death or serious injury. 4. Align the rollers on each side of the circuit breaker with the positioning rails (Figure 18) mounted on the side walls of the circuit breaker compartment. Figure 18: Masterclad Switchgear Circuit Breaker Compartment Racking position indicator Positioning rail Lift truck catch pins Schneider Electric All Rights Reserved

25 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Installation WARNING HAZARD OF BODILY INJURY OR EQUIPMENT DAMAGE Never force the circuit breaker into the circuit breaker compartment. If a mechanism is not operating easily, inspect the equipment and remove any foreign objects or debris. Failure to follow this instruction can result in death or serious injury. 5. Push the circuit breaker into the compartment until the front of the circuit breaker lines up with the test position arrows (Figure 19 on page 25) located on top of the left positioning rail. When the circuit breaker is in the TEST/DISCONNECT position, the release handle should engage. NOTE: If the circuit breaker does not easily roll into the circuit breaker compartment, remove the circuit breaker. If necessary, pull the release handle to release the circuit breaker from the TEST/DISCONNECT position. Repeat process. If satisfactory results are not achieved, contact Schneider Electric. Figure 19: Test and Connected Position Arrows Connected position arrow Test position arrow Testing the Circuit Breaker in the TEST/DISCONNECT Position The circuit breaker secondary disconnect (male, Figure 20) connects to the circuit breaker compartment secondary disconnect (female) located on the floor of the circuit breaker compartment. This provides a convenient method for electrically testing the operation of the circuit breaker mechanism. Figure 20: Circuit Breaker Secondary Disconnect (Male) Circuit breaker secondary disconnect 1. Rotate the secondary disconnect handle (Figure 21 on page 26), located on the floor of the circuit breaker compartment, upward Pull the secondary disconnect handle out until the circuit breaker compartment secondary disconnect (female, Figure 21 on page 26) engages the circuit breaker secondary disconnect Schneider Electric All Rights Reserved 25

26 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Installation 06/2012 NOTE: The control circuit of the circuit breaker is now connected to control power. If the control circuit is energized, this connection immediately activates the spring charging motor inside the circuit breaker. Figure 21: Secondary Disconnect Handle and Connector Circuit breaker compartment secondary disconnect (female) Secondary disconnect handle 3. Push the CLOSE (I) pushbutton. If the spring charging motor was correctly activated by the control circuit, the CLOSE (I) pushbutton should release the closing latch, allowing the closing spring assembly to discharge. The closing spring assembly pushes down on the crossbar, that is connected to the vacuum interrupters, and closes the vacuum interrupter contacts. 4. Push the OPEN (O) push button. If the opening spring assembly was correctly charged (compressed) by the closing operation, the mechanism will release the opening latch and allow the opening spring assembly to discharge. The opening spring assembly pulls up on the crossbar connected to the vacuum interrupters and opens the vacuum interrupter contacts. Racking the Circuit Breaker into the CONNECTED Position WARNING HAZARD OF BODILY INJURY OR EQUIPMENT DAMAGE Always keep circuit breaker compartment door closed when racking the circuit breaker from one position to another when the switchgear is energized. Beware of potential hazards, wear personal protective equipment, and take adequate safety precautions. Failure to follow these instructions can result in death or serious injury. 1. Make sure the circuit breaker is OPEN (O). NOTE: The circuit breaker must be in the OPEN (O) position when it is racked into or out of its circuit breaker compartment. Interlocks will not allow the racking shaft to rotate if the circuit breaker is not OPEN (O). 2. Close the circuit breaker compartment door. a. Make sure the door handle is in the READY-TO-CLOSE position when closing the door. The door will stay closed, but the arc resistant feature will not be active. b. When the door is closed, rotate the door handle towards the LATCH position. This will latch the door in the closed position, making the circuit breaker compartment ready for normal operation. c. The door handle can be padlocked in the LATCH position. 3. Remove the padlock, if installed, from the racking port located at the bottom of the circuit breaker door (Figure 22 on page 27). 4. Open the racking port, insert the provided racking handle into the port, and engage the handle onto the racking shaft (Figure 22 on page 27). NOTE: If the circuit breaker does not easily rack into the circuit breaker compartment, remove the circuit breaker and contact your local Schneider Electric representative Schneider Electric All Rights Reserved

27 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Installation WARNING HAZARD OF BODILY INJURY OR EQUIPMENT DAMAGE Never force the circuit breaker into or out of the circuit breaker compartment. If a mechanism is not operating easily, inspect the equipment and remove any foreign objects or debris. Failure to follow this instruction can result in death or serious injury. Figure 22: Racking Handle Engaged onto Racking Shaft with Circuit Breaker in the TEST/DISCONNECT Position Padlockable racking port Racking handle 5. Rotate the racking handle clockwise. 6. When the circuit breaker is being transported to or from the CONNECTED position, the racking position indicator will read TRANSPORT. NOTE: When the racking position indicator reads CONNECTED, the circuit breaker is fully racked into the circuit breaker compartment and the circuit breaker s primary contacts are connected. 7. Continue rotating the racking handle clockwise until the racking position indicator reads CONNECTED. Circuit Breaker Removal Racking the Circuit Breaker Out of the CONNECTED Position This section describes the removal of the circuit breaker. 1. Make sure the circuit breaker is OPEN (O). WARNING HAZARD OF BODILY INJURY OR EQUIPMENT DAMAGE Always keep circuit breaker compartment door closed when racking the circuit breaker from one position to another when the switchgear is energized. Beware of potential hazards, wear personal protective equipment and take adequate safety precautions. Failure to follow these instructions can result in death or serious injury. 2. Insert the racking handle into the racking port and engage the racking handle onto the racking shaft (Figure 22 on page 27). WARNING HAZARD OF BODILY INJURY OR EQUIPMENT DAMAGE Never force the circuit breaker into or out of the circuit breaker compartment. If a mechanism is not operating easily, inspect the equipment and remove any foreign objects or debris. Failure to follow this instruction can result in death or serious injury. NOTE: If the circuit breaker does not easily rack out of the circuit breaker compartment, reconnect the circuit breaker and repeat this process. If satisfactory results are not achieved, contact Schneider Electric Schneider Electric All Rights Reserved 27

28 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Installation 06/ Rotate the racking handle counterclockwise. When the circuit breaker is being transported to or from the CONNECTED position, the racking position indicator will read TRANSPORT. NOTE: When the circuit breaker is moved from the CONNECTED position to the TEST/DISCONNECT position, the auxiliary contacts are disconnected. 4. Continue rotating the racking handle until the racking position indicator reads TEST/DISCONNECT. Another half-turn is required a stop is felt when the racking handle reaches its final position to unlock the door. Removing the Circuit Breaker from the Circuit Breaker Compartment Figure 23: Removing the Circuit Breaker from the Compartment 1. Open the circuit breaker compartment door. a. To open the circuit breaker door, remove the padlock (if installed) from the door handle. b. Rotate the door handle to the OPEN position then pull to open the door. c. Release the door handle and it will automatically move to the READY-TO-CLOSE position. 2. Use the supplied ramp or lift truck as shown in Figure 23 on page 28 to remove the circuit breaker from the circuit breaker compartment. (A lift truck must be used to remove the circuit breaker from switchgear on a raised pad.) For instructions on using a lift truck, see Using the Lift Truck starting on page Pull the release handle to release the circuit breaker from the TEST/DISCONNECT position. The circuit breaker will trip if it is closed. 4. Pull the circuit breaker out of the circuit breaker compartment. NOTE: When the circuit breaker is removed, you will hear a loud noise as the spring discharges Schneider Electric All Rights Reserved

29 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Installation Locking Provisions Figure 24: Devices That Can Be Padlocked The following devices (Figure 24) can be locked with a padlock: The racking mechanism located in the circuit breaker compartment floor. The circuit breaker door handle. The racking port. Racking Mechanism Breaker Door Handle Racking Port Voltage Transformer Drawout Unit Inspection Racking the Voltage Transformer Drawout Unit Out of the CONNECTED Position Inspect the voltage transformer (VT) drawout unit before energizing. Follow the steps below to perform the inspection. 1. With the VT compartment door closed, insert the racking handle into the racking port and engage the handle onto the racking shaft (see Figure 25 on page 29). WARNING HAZARD OF BODILY INJURY OR EQUIPMENT DAMAGE Never force the primary fuse drawout unit into or out of the primary fuse drawout unit compartment. If the racking mechanism is not operating easily, inspect the equipment and remove any foreign objects or debris or contact Schneider Electric. Failure to follow this instruction can result in death or serious injury. Figure 25: Racking Handle Engaged onto Racking Shaft Locking port 2. Rotate the racking handle counterclockwise. NOTE: If the voltage transformer drawout unit does not easily rack out of the CONNECTED position, contact Schneider Electric. 3. Verify that the grounding contact tabs, extending from the ground bar at the top on the voltage transformer (VT) drawout compartment, touch the fuse ground tabs on the VT drawout unit as it moves from the CONNECTED position to the DISCONNECTED position. The tabs can be seen through the viewing window in the VT compartment door. 4. Continue rotating the racking handle counterclockwise until the VT drawout unit is fully racked to the DISCONNECTED position. Racking handle Schneider Electric All Rights Reserved 29

30 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Installation 06/2012 Inspecting the Fuses Racking the VT Drawout Unit into the CONNECTED Position Open the VT drawout compartment door to visually inspect fuses for possible damage. Replace the fuses if necessary. See Replacing the Fuses starting on page 38. After inspecting the VT drawout unit, follow the steps below to rack it to the CONNECTED position. 1. Close the VT drawout unit compartment door. 2. Insert the racking handle into the racking port and engage the handle onto the racking shaft. 3. Rotate the racking handle clockwise until VT drawout unit is fully racked to the CONNECTED position. NOTE: If the voltage transformer drawout unit does not easily rack into the CONNECTED position, rack the unit to the DISCONNECT position, and remove any objects or debris from the compartment. Repeat this process. If results are not satisfactory, contact Schneider Electric. Voltage Transformer Drawer Figure 26 shows the voltage transformer (VT) drawer connected to the load bus. Figure 26: VT Drawer Compartment VT Compartment Main Bus Compartment Circuit Breaker Compartment Cable Compartment Schneider Electric All Rights Reserved

31 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Installation This is a racking-through-the-door type compartment with interlocks (see Figure 27). The racking port can be padlocked. Figure 27: VT Drawer Door Latched Door handle (latched position) Auxiliary viewing window Indicator viewing window Voltage Transformer Drawer Interlocks The racking mechanism is not accessible if the door is not closed and latched (Figure 28). NOTE: The latching system is intended to be arc resistant. The auxiliary door must be latched to activate the arc resistant feature. The door cannot be opened if: The drawer is out of the DISCONNECTED position. The racking handle is inserted in the racking port (Figure 28). The racking mechanism uses the same racking handle as the racking mechanism for the circuit breaker compartment. Figure 28: VT Racking Handle Inserted Racking handle Schneider Electric All Rights Reserved 31

32 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Installation 06/2012 Voltage Transformer Drawer Characteristics The primary contacts and fuses are viewable through a window in the voltage transformer (VT) drawer door. When the VT drawer is in the DISCONNECTED position, the primary contacts are viewable but not accessible. A fuse discharge bar (Figure 29) is located in the front portion of the compartment and is intended to return to ground any remaining voltage that could be accumulated in the voltage transformers. Figure 29: Voltage Transformer Drawer in Withdrawn Position Fuse discharge bar Voltage Transformer Drawer Wiring The secondary contacts of the VT are linked to the control box through secondary contacts located underneath the tray of the VT drawer (see Figure 30). Figure 30: Voltage Transformer Wiring VT secondary connection Microswitches (not shown) High-Potential Testing Test Preparation Phase-to-Phase Test Before making external power connections, perform a high-potential (hi-pot) dielectric withstand test on the bus and circuit breakers as an assembly. 1. Disconnect lightning arresters. 2. Withdraw the voltage transformer drawer (if provided). 3. Place each of the circuit breakers in its proper circuit breaker compartment in the connected position. Charge their springs manually, and then close each circuit breaker by using the CLOSE (I) push button. 1. Perform a phase-to-phase hi-pot test on the main bus. a. Gradually increase the voltage to the levels shown in Table 3. b. Verify that the equipment sustains the specified voltage without flashover for one minute. 2. Turn off the test equipment. Discharge the phase bus to ground before removing the test cables Schneider Electric All Rights Reserved

33 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Installation Phase-to-Ground Test 1. Perform a phase-to-ground hi-pot test on the main bus. a. Gradually increase the voltage to the levels shown in Table 3. b. Verify that the equipment sustains the specified voltage without flashover for one minute. 2. Turn off the test equipment. Discharge the phase bus to ground before removing the test cables. Use a reliable transformer-type tester with a built-in voltmeter and milliamp meter for hi-pot testing. Capacitor loaded bench-type testers with neon bulb indicators do not have sufficient capacity to give reliable results. Refer to Table 3 for the nominal test values for dry, clean, new assemblies. Field hi-pot tests are made at 75% of factory test voltages in accordance with ANSI standards. Phasing Cable Connections Insulating the Cable Connections Table 3: One Minute Hi-Potential Test 1 Assembly Rated Maximum Voltage Factory Test Voltage (AC) 1 AC voltages are 60 Hz rms symmetrical. Field Test Voltage AC DC 5 kv 19 kv 14 kv 20 kv 15 kv 36 kv 27 kv 38 kv If satisfactory results are not obtained, locate the problem, correct it, and rerun the test before proceeding. If results are acceptable, the power cables, ground wires, external wiring, and battery (if supplied) can be connected to the assembly. If results are not acceptable, contact your local Schneider Electric representative. In accordance with NEMA standards, all bus within the switchgear is phased A-B-C left to right, top to bottom, and front to back when viewing the assembly from the front (the circuit breaker compartment side). If, for any reason, the bus must be phased differently, the different phases will be identified on the bus with a label. Be very careful when making cable terminations, as terminations are critical to the successful operation of the electrical distribution system. Avoid sharp turns, edges, or corners to prevent damage to the cable insulation. Follow the cable manufacturer s recommendations for minimum bending radius. These instructions will vary, depending on the manufacturer. Solderless or compression-type cable lugs are the most common method for connecting power cables to metal-clad switchgear. When making the terminations for each type of power cable, follow the cable manufacturer s instructions. After the cable connections are made, insulate them as follows. Insulating putty and tape (provided by customer) or other insulating means may be used to insulate the power cable connections. 1. Place insulating putty, such as 3M brand Scotchfil, around the lugs and bolts to reduce the concentrated field created by their irregular shapes (Figure 31 on page 34). Apply a layer of Scotch brand No. 13 (or equivalent) semiconducting tape over the insulating putty. Half-lap the tape, which must extend onto the conductor. Do not extend the tape up over the bus epoxy insulation. Apply Scotch No. 130C (or equivalent) tape over the No. 13 tape. Half-lap this tape for two layers on 5 kv installations and four layers on 15 kv installations. For 5 kv installations, Schneider Electric All Rights Reserved 33

34 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Installation 06/2012 extend the tape 1-1/2 in. (38 mm) up over the bus insulation and cable insulation. For 15 kv installations, extend the tape 2 in. (51 mm). 2. Apply two layers of Scotch Brand No. 22 tape (or equivalent), extending the tape up over the No. 130C tape in all directions. The tape and other insulating materials for completing these field connections are not supplied with the switchgear. 3. If potheads or cable terminators are supplied for terminating power cables, follow the pothead manufacturer s instructions for terminating the cables in these devices. To facilitate installation of the power cables, the bus side is not taped. After the cables are installed, insulate the pothead-to-bus connections according to the cable lug insulation instructions in this section. Figure 31: Power Cable Connection Insulation Fill voids with Scotchfil Putty Layer Scotch No. 13 semi-conductor tape Scotch No. 130C tape: 2 layers for 5 kv 4 layers for 15 kv Lugs Bus 0.5 in. (13 mm) Scotch No.22 tape Overlap Scotch No. 130C tape over cable insulation by: 1.5 in. (38 mm) for 5 kv 2 in. (51 mm) for 15 kv Note: Scotch No. 13 semi-conductor tape must touch bus or terminals in at least one place; tape should not overlap bus or cable insulation Scotch No.22 2 layers Overlap Scotch No. 130C tape over cable insulation by: 1.5 in. (38 mm) for 5 kv 2 in. (51 mm) for 15 kv 0.5 in. (13 mm) Scotch No.22 tape NOTE: All taping is half-lapped Schneider Electric All Rights Reserved

35 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Operation Operation Start-Up The section contains instructions for operating the Masterclad arc resistant metal-clad indoor switchgear unit. DANGER HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E and CSA Z462. All personnel involved in the start-up operation should be thoroughly familiar with the information in this instruction bulletin and customer drawings provided before working on this equipment. Turn off all power supplying this equipment before working on it. Before performing maintenance on this device, disconnect all sources of electric power. Assume all circuits are live until they are completely de-energized, tested, grounded, and tagged. Pay particular attention to the design of the power system. Consider all sources of power. Check interconnection diagrams and make sure there are no backfeed potential sources. Always use a properly rated voltage sensing device to confirm that power is off. Preliminary Start-Up Procedures Installing and Testing Circuit Breakers in the TEST/DISCONNECT Position Failure to follow these instructions will result in death or serious injury. Training of personnel for final start-up is available. Contact your local Schneider Electric representative for more information. 1. Turn off all main and control power supplying the equipment. 2. Vacuum every compartment. Remove all loose parts, tools, miscellaneous construction items, and litter. 3. Verify that all insulating boots are installed. 4. Replace all of the main bus covers and any other barriers or covers that were removed during installation. 5. Install the cable compartment back covers. 6. Connect the battery charger and batteries (if used) to the switchgear control bus according to the order drawings. 7. Unblock all of the relays and set to the relay schedule. Using a relay tester, verify the settings and electrical operation of each relay. 8. Verify that any control power transformer used has the current limiting fuses in place. Pull the drawer out to the withdrawn position. 9. Check that the pressure relief flaps (Figure 7 on page 13) are closed and free of obstructions. Follow the steps for installing and testing the circuit breaker in the TEST/DISCONNECT position outlined in Installing the Circuit Breaker into the TEST/DISCONNECT Position on page Schneider Electric All Rights Reserved 35

36 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Operation 06/2012 Operation Perform these steps before energizing the equipment. If necessary, use an external control power source. 1. Follow the steps outlined in Racking the Circuit Breaker into the CONNECTED Position on page Electrically close and open the circuit breaker with the door-mounted circuit breaker control switch. Open the circuit breaker by temporarily closing the contacts of each protective relay. Reset the relay targets after each operation. 3. Electrically operate from remote control locations and check the remote indicating lights. 4. Operate all electrical interlocks, transfer schemes, lock-out relays, and other control functions to ensure proper operation. 5. Remove the temporary source of low voltage power (if used) and make the permanent connection of low voltage power. 6. If drawout fuses and drawout voltage transformers are included in the installation, rack them into the connected position by following the steps outlined in Racking the VT Drawout Unit into the CONNECTED Position on page Using a properly rated voltage sensing device, verify again that trip voltage is available at the circuit breaker control terminals in each compartment. Energizing the Switchgear To establish electrical service follow these steps: 1. Energize the incoming high voltage circuits. 2. Close the main circuit breakers. 3. Close the feeder circuit breakers. 4. Turn on loads one at a time. Removing Circuit Breakers Follow the steps outlined in Circuit Breaker Removal on page Schneider Electric All Rights Reserved

37 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Inspection and Maintenance Inspection and Maintenance Perform inspection and maintenance annually or more frequently based on equipment usage at least every 50 cycles. Abnormal operation or conditions may require immediate corrective action. DANGER HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E and CSA Z462. Only qualified personnel familiar with medium voltage equipment are to perform work described in this set of instructions. Workers must understand the hazards involved in working with or near medium voltage equipment. Before performing visual inspections, tests, or maintenance on this device, disconnect all sources of electric power. Assume all circuits are live until they are completely de-energized, tested, grounded, and tagged. Pay particular attention to the design of the power system. Consider all sources of power. Check interconnection diagrams and make sure there are no backfeed potential sources. Turn off all power supplying this equipment before working on it. Always use a properly rated voltage sensing device to confirm that power is off. Perform inspection and maintenance only with the main sources of power disconnected and locked open with a work lock. Failure to follow these instructions will result in death or serious injury. Main Bus Compartment NOTE: Slight discolorations or tarnish of the silver plate is normal. Severe discoloration of the silver plate is an indication of an improper or loose contact and overheating. Clean the discoloration from the contact surfaces of the busbar and primary contact. Use an abrasive pad such as Scotch Brite. For questions concerning cleaning, repairing, or replacing bus bars contact your local Schneider Electric representative. 1. Turn off all main and control power supplying this equipment. Be sure there is no backfeed through any feeder circuit. Always use a properly rated voltage sensing device to confirm that power is off. 2. Ground the main and feeder circuits. 3. Disconnect and remove fuses. 4. Disconnect and remove the circuit breaker. 5. Remove the covers from each main bus compartment. Inspect the busbars, primary contact supports, and insulating barrier(s). 6. Remove the insulating boots from the bus joints. Check all busbar connections, and torque all 0.5 in. (13 mm) bolts to 55 lb-ft (74.28 N m). 7. Vacuum each compartment to remove dust, spiderwebs, etc. Wipe off the insulation with a clean cloth. 8. Lightly lubricate the moving primary and secondary contacts and fingers with red Mobilgrease 28 (Schneider Electric part number ). 9. Lightly lubricate the following parts with red Mobilgrease 28 (Schneider Electric part number ): Rollers and sliding parts Racking arm and shaft Shutter actuator Schneider Electric All Rights Reserved 37

38 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Inspection and Maintenance 06/2012 Replacing the Fuses Follow the steps below to replace damaged fuses in the voltage transformer drawout unit: NOTE: When replacing fuses, handle them carefully to avoid breakage. Do not grasp the fuse in the middle. Replace all fuses, even if only one is damaged. 1. Follow the procedures outlined in Voltage Transformer Drawout Unit Inspection on page 29 to withdraw the appropriate fuse drawout unit. 2. Wearing personal protective equipment, such as insulated gloves and a face shield, grasp the fuse near the fuse clip and pull while rotating the fuse. 3. Insert the fuses one end at a time into the fuse clips. 4. Follow the racking procedures outlined in Voltage Transformer Drawout Unit Inspection on page 29 to return the unit to the CONNECTED position. Re-Energizing Install all of the circuit breakers to the TEST/DISCONNECT position with their secondary disconnects engaged. 1. Remove the ground from the main and feeder circuits. 2. Close and latch all compartment doors. Close and bolt all cable compartment doors and power transformer drawer doors. 3. Connect the control power source. 4. Close the main source of power, and operate each circuit breaker electrically in the TEST/DISCONNECTED position (Figure 3 on page 9). 5. If all controls are functioning properly, disconnect the secondary control plugs. 6. Rack the circuit breakers into the connected position (see Racking the Circuit Breaker into the CONNECTED Position on page 26). 7. Energize the incoming high voltage circuits. 8. Close the main circuit breakers. 9. Close the feeder circuit breakers. 10. Turn on loads one at a time Schneider Electric All Rights Reserved

39 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Accessories Accessories Using the Lift Truck Figure 32: Typical Lift Truck This section contains information about Masterclad arc resistant metal-clad indoor switchgear accessories. If the switchgear will be installed on a raised pad, a circuit breaker lift truck (Figure 32) is required. WARNING HAZARD OF BODILY INJURY OR EQUIPMENT DAMAGE Check the nameplate of the lift truck before using it. Circuit breakers rated for 50 ka, and below, require a lift truck rated for 800 lbs (363 kg) or more. Circuit breakers rated for 63 ka require a lift truck rated for 950 lbs (431 kg). Failure to follow these instructions can result in death, serious injury, or equipment damage. Safety cable The cradle is raised and lowered by a self-braking worm and pinion drive system with a winch and wire cable. No ratchet release or locking is required because of the automatic load-retaining clutch feature. Rotating the handle clockwise raises the cradle. Rotating the handle counterclockwise lowers the cradle. To remove a circuit breaker from the circuit breaker compartment with the lift truck: For users in Mexico: An optional circuit breaker installation ramp is available. 1. Push the lift truck toward the circuit breaker compartment so the cradle is square with the front of the circuit breaker cell. 2. Raise the cradle until the cradle floor clears the catch pins on each side of the circuit breaker compartment floor (Figure 5 on page 11). 3. Line up the holes in the brackets on the front of the cradle with the catch pins on the circuit breaker compartment floor. 4. Lower the cradle until it is securely held by the catch pins. 5. Roll the circuit breaker onto the lift truck. 6. Secure the circuit breaker on the lift truck using the safety cable provided. 7. Raise the cradle until it clears the catch pins. 8. Remove the lift truck and circuit breaker from the cell and lower the cradle to the floor. 9. To remove the circuit breaker from the lift truck, disconnect the safety cable from the front of the circuit breaker. 10. Push the circuit breaker slightly toward the back of the cradle and pull the lever on the back of the cradle while rolling the circuit breaker off of the cradle Schneider Electric All Rights Reserved 39

40 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Accessories 06/2012 Test Cabinet (Optional) An optional wall-mounted test cabinet (Figure 11 on page 20) is furnished when listed in the user s specifications. The test cabinet consists of a small enclosure including: A power on-off toggle switch. A white light indicating the power is on. A red light indicating the circuit breaker is closed. A green light indicating the circuit breaker is open. Close and open pushbuttons. An 8 ft. (2.44 m) cable with a secondary control receptacle that can be plugged directly into the circuit breaker control plug. Refer to the customer drawings for the external power connections and requirements necessary for the cabinet. A convenient terminal block is provided inside the test cabinet for these connections. Figure 33: Wall-Mounted Test Cabinet (Optional) Ground and Test Devices Two types of ground and test devices are available: Manual Electrical Ground and test devices are safety devices, typically used for: Grounding of circuits during maintenance periods. Connection points for applying voltage for hi-pot testing and cable testing access to both line side and load side circuits for phase sequence testing. NOTE: A complete description, operating instructions, and maintenance information are included in a separate ground and test devices instruction bulletin Schneider Electric All Rights Reserved

41 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Arc Exhausting Systems Arc Exhausting Systems Table 4: Standard application Plenum application Arc Shield application Minimum Required Ceiling Height from Floor 192 in. (4880 mm) 150 in. (3810 mm) 192 in. (4880 mm) Two different, mutually exclusive, arc exhausting systems are available: A plenum for redirecting arc flash exhaust to a remote, safe location, and An arc shield for increasing the likelihood of protection from hazardous arc flash gases and debris overflowing the top exhaust ports. NOTE: For 63 ka Masterclad switchgear, the plenum assembly is the only exhaust system available. Plenum Assembly The plenum is mounted on the top of each compartment to help redirect explosive energies in the event of an electrical fault. The exhaust must always be directed to a secure location. Figure 34: Typical Indoor Plenum Application Plenum Exhaust Duct Section Exhaust Duct Section End Cover 18.0 in. (457.2 mm) Wall Exit Point Secure Location 99.0 in mm) A secure area of 30 ft. x 30 ft. (9 m x 9 m) is required outside the control room. 1/2-13 Threaded Rod 2.8 in. (70.8 mm) 8.5 in. (215.9 mm) 3/8-16 Cap Screws (22 total) 1.5 in. (38.1 mm) 1/2-13 Nut 1/2 in. Flat Washer 16.0 in. (406.4 mm) 6.5 in. (165.1 mm) 1 5/8 in. T Series Unistrut 1/3-13 Lock Nut 65.0 in. ( mm) Exhaust Support Exhaust Mounting Flange Plenum assemblies are shipped separately and are designed for installation after the equipment is positioned. Plenum applications consist of the following standard offerings: NOTE: Customized exhaust section lengths are available. Also, plenum assemblies are available for outdoor applications in Power Zone Centers. Call for more information. Plenum One per switchgear section Exhaust Duct Standard length is 79.0 in. ( mm) End Cover Exhaust Support Required for each 84.0 in. ( mm) exhaust duct section Schneider Electric All Rights Reserved 41

42 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Arc Exhausting Systems 06/2012 Installing the Plenum Assembly This section contains instructions for installing one or more plenum assemblies on Masterclad switchgear. DANGER HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E and CSA Z462. Only qualified personnel familiar with medium voltage equipment are to perform work described in this set of instructions. Workers must understand the hazards involved in working with or near medium voltage circuits. Perform such work only after reading and understanding all of the instructions contained in this bulletin. Turn off all power supplying this equipment before working on it. Always use a properly rated voltage sensing device to confirm that power is off. Disconnect all sources of power to the switchgear before accessing the horizontal Plenum exhaust area. Failure to follow these instructions will result in death or serious injury. 1. Remove the roof mounting hardware and the lifting angles. NOTE: Hardware quantities listed are per cubicle. NOTE: For end cubicles, remove only the hardware on the right and left roof edges. Figure 35: Plenum Assemblies Figure 36: Prepared Roof Detail Plenum (Lefthand and Righthand End Bays) 14.1 in. (358.2 mm) Rear 1/4-20 Cap Screws (14 total) 44.2 in. ( mm) Plenum Section and End Cover 1/4-20 Cap Screws (14 total) 1/4-20 Thread-forming Screws (20 total) 3/8-16 Cap Screws (6 total) Rear 1/4-20 Cap Screws (15 total) 9.1 in. (231.4 mm) Exhaust Duct Section NOTE: The plenum is designed to be lifted with a crane or tow motor Schneider Electric All Rights Reserved

43 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Arc Exhausting Systems Refer to Figure 35 on page 42 and Figure 37 on page 44 for the following steps. 2. Install the plenum sections to the switchgear roof, using the included 1/4-20 cap screws and nuts along the mid-support and side-mounting edges. 3. Install the end cover support and end cover to the plenum section opposite the intended exhaust path, using the included 1/4-20 and 3/8-16 cap screws. 4. Connect adjacent plenum sections along the connection flange, using the 1/8 in. gasket and 3/8-16 cap screws, washers, and nuts. 5. Repeat this process for adjacent switchgear sections. 6. Install the exhaust duct section to the adjacent connection flange, using the 1/8 in. gasket and 3/8-16 cap screws, washers, and nuts. 7. Install the exhaust support with the support installation kit included with each exhaust duct section (Figure 34 on page 41). NOTE: For further assistance, call Repeat this process until exhaust ducting reaches wall exit point. NOTE: The final exhaust duct section will be of a custom length, as specified when ordered, to accommodate the specific installation. 9. Connect the exhaust duct to the wall exit point, using the 1/8 in. gasket and 3/8-16 cap screws, washers, and nuts Schneider Electric All Rights Reserved 43

44 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Arc Exhausting Systems Figure 37: /2012 Plenum Installation Detail 3/8-16 Anchor 1/8 in. Gasket Exhaust Flange Wall Mounting 1/8 in. Gasket 3/8-16 Cage Nut 3/8 in. Cone Washer Connection Flange 3/8-16 Cap Screw 3/8 in. Cone Washer 3/8-16 Cap Screw 1/4-20 Cap Screw Rear of Equipment Mid-Support Mounting Edge 3/8-16 Lock Washers (6 total) 1/8 in. Gasket 3/8-16 Cage Nuts (8 total) 3/8-16 Cap Screws (6 total) 1/4-20 Cap Screws (20 total) 1/4-20 Cap Screw End Cover Support Side Mounting Edge Schneider Electric All Rights Reserved

45 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Arc Exhausting Systems Arc Shield Assembly Figure 38: Typical Arc Shield Application The arc shield is designed to raise the switchgear exhaust height, should an arc event occur, thereby increasing the likelihood of protection at the front, rear, and sides of the equipment. Arc Shield 31.2 in. (792.5 mm) 99.0 in mm) The recommended minimum space around the equipment is: Ceiling height from floor 192 in. ( mm) Rear and side of equipment 40 in. (1000 mm) Front of equipment 72 in. ( mm) Arc shield assemblies are shipped separately and are designed for installation after the equipment is positioned. Figure 39: Arc Shield Assemblies Front Front Front Mounting Flange (3 sides) Mounting Flange (2 sides) Mounting Flange (3 sides) Lefthand End Bay Arc Shield Section Intermediate Arc Shield Section Righthand End Bay Arc Shield Section Schneider Electric All Rights Reserved 45

46 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Arc Exhausting Systems 06/2012 Installing the Arc Shield Assembly This section contains instructions for installing one or more arc shield assemblies on Masterclad switchgear. DANGER HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E and CSA Z462. Only qualified personnel familiar with medium voltage equipment are to perform work described in this set of instructions. Workers must understand the hazards involved in working with or near medium voltage circuits. Perform such work only after reading and understanding all of the instructions contained in this bulletin. Turn off all power supplying this equipment before working on it. Always use a properly rated voltage sensing device to confirm that power is off. Disconnect all sources of power to the switchgear before accessing the top shield exhaust area. Failure to follow these instructions will result in death or serious injury. 1. Remove the roof mounting hardware and the lifting angles. NOTE: Hardware quantities listed are per cubicle. Retain all removed hardware for installing the arc shield. NOTE: For end cubicles, remove only the hardware on the right and left roof edges. Figure 40: Prepared Roof Detail Arc Shield (Lefthand and Righthand End Bays) 14.1 in. (358.2 mm) 1/4-20 Cap Screws (7 total) 1/4-20 Thread-forming Screws (20 total) 3/8-16 Cap Screws (6 total) 1/4-20 Cap Screws (15 total) 9.1 in. (231.4 mm) Schneider Electric All Rights Reserved

47 /2012 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Arc Exhausting Systems NOTE: The arc shield is designed to be lifted with a crane or tow motor. Arc shields mount to the switchgear roof using the 1/4-20 and 3/8-16 hardware retained in step Install the lefthand end bay arc shield section to the leftmost section of the switchgear roof, using the included screws along the three mounting flange edges. 3. Install the next intermediate (if more than one switchgear section remaining needs arc shielding), or the righthand end bay arc shield section (if only one switchgear section remaining needs arc shielding) to the switchgear roof, using the included screws along the mounting flange edges. 4. Connect adjacent arc shield sections along the connection flange, using the included 3/8-16 cap screws, washers, and nuts. 5. Connect adjacent arc shield section tops with an arc shield splice, using the included 3/8-16 cap screws, washers, and nuts. 6. Repeat this process for adjacent switchgear sections until the righthand end bay arc shield section is installed. Figure 41: Arc Shield Installation Detail 3/8 in. Cone Washer 3/8-16 Cap Screw Arc Shield Splice Splice 3/8 in. Cone Washer 3/8-16 Cage Nut 1/4-20 Cap Screw 3/8-16 Cap Screw Front and Rear Mounting 3/8-16 Cap Screw 3/8-16 Lock Washer 1/4-20 Thread-forming Screw End Bay Flange Mounting Schneider Electric All Rights Reserved 47 Refer to Figure 39 and Figure 41 for the following steps.

48 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Configuration Drawings 06/2012 Configuration Drawings Figure 42: Masterclad Arc Resistant Metal-Clad Indoor Switchgear Configurations E E C C D D A B A B H 1-High Auxiliary/Breaker (1200 A) 1-High Auxiliary/Breaker (2000 A) F C G D C D A B A B H H 2-High Breaker/Breaker (1200/2000 A or 1200/1200 A) 1-High Breaker (3000 A) A. Bottom Circuit Breaker Compartment B. Bottom Load Compartment C. Main Bus Compartment D. Control Instrument Compartment E. Auxiliary Device Compartment F. Top Breaker Compartment G. Top Load Compartment H. Sub Floor Schneider Electric All Rights Reserved

49 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Installation and Maintenance Log Installation and Maintenance Log Date Initials Actions Schneider Electric All Rights Reserved 49

50 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Installation and Maintenance Log 06/2012 Date Initials Actions Schneider Electric All Rights Reserved

51 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear 06/2012 Installation and Maintenance Log Schneider Electric All Rights Reserved 51

52 Masterclad 5 15 kv Arc Resistant Metal-Clad Indoor Switchgear Instruction Bulletin Schneider Electric USA, Inc. 330 Weakley Road Smyrna, TN USA Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material. Masterclad, Square D, and Schneider Electric are trademarks or registered trademarks of Schneider Electric. Other trademarks used herein are the property of their respective owners /2012 Replaces / Schneider Electric All Rights Reserved