Contents. Low Voltage Metal-Enclosed Switchgear 12-2 Secondary Unit Substations 12-20. 12 Switchgear

12 POWER PRODUCT Switchgear Contents Low Voltage Metal-Enclosed Switchgear 12-2 Secondary Unit Substations 12-20 12 Switchgear

12 SWITCHGEAR Type WL Low Voltage Metal-Enclosed Switchgear 2 Siemens WL breakers can be manually Type WL Low Voltage Metal-Enclosed Switchgear Siemens Type WL low voltage Information metal-enclosed switchgear is designed, constructed and tested to provide superior power distribution, power monitoring and control. At the heart of the Type WL low voltage switchgear Siemens Type WL low voltage metalenclosed breaker. switchgear is designed, is the World Class Siemens WL constructed and tested to provide Siemens Type WL low voltage superior power distribution, power switchgear can be utilized in the monitoring and control. At the heart of the Type WL low voltage switchgear following applications: is the World Class Siemens WL breaker. b Industrial Siemens Type WL low voltage switchgear can be utilized in the following Heavy assembly applications: Semiconductor Industrial Petrochemical Heavy assembly Automotive Semiconductor Petrochemical Biotech Automotive Pharmaceutical Biotech Pharmaceutical b Institutional Institutional Water treatment Water treatment Airports Airports Universities Universities Medical facilities Correctional facilities Medical facilities Critical Power Correctional facilities Data Processing b Critical Power Continuous industrial process Hospitals Industry Standards Data Processing Type WL switchgear with power circuit Utility and co-generation Industry Standards breakers are designed, tested and constructed with in accordance power with: circuit Continuous industrial processcommercial Type WL switchgear Hospitals Large office buildingsbreakers are designed, UL 1558 tested Metal-Enclosed and Low Distribution centers b Utility and co-generation Voltage Power Circuit Breaker Large warehouses constructed in accordance Switchgear with: b Commercial Product Scope: b UL 1558 Metal-Enclosed ANSI C37.20.1 Metal-Enclosed Low Large office buildings Equipment ratings Voltage Power Low Circuit Voltage Breaker Power Circuit Breaker 635VAC Maximum Switchgear Distribution centres 1 Phase 3 Wire, 3 Phase 3 Switchgear Wire, ANSI C37.50 Test Procedure for Large warehouses 3 Phase 4 Wire b ANSI C37.20.1 Low Metal-Enclosed Voltage AC Power Circuit 50/60 Hz Product Scope: Breakers Used in Enclosures 6000 amp maximum horizontal Low Voltage bus Power Circuit Breaker 5000 amp maximum vertical bus ANSI C37.51 Conformance b Equipment ratings Switchgear Testing of Metal-Enclosed Low Enclosure options 635VAC Maximum Voltage AC Power Circuit Breaker NEMA 1 Indoor b ANSI C37.50 Test Procedure for Switchgear Assemblies 1 Phase 3 Wire, 3 Phase 3 Wire, NEMA 3R Outdoor Walk-In Low Voltage AC Power Circuit NEMA 3R Outdoor Non Walk-in NEMA SG5 - Power Switchgear 3 Phase 4 Wire Breakers Used Assemblies in Enclosures 50/60 Hz Siemens WL breakers b can ANSI be manually C37.51 Applicable Conformance requirements of the or electrically operated, fused or unfused bus and are available in Testing the following of Metal-Enclosed Low National Electric Code (NEC) 6000 amp maximum horizontal 5000 amp maximum vertical rating bus classes. Refer to Tables on Page Voltage AC Power 13 for interrupt and withstand ratings WL drawout Circuit circuit Breaker breakers are b Enclosure options for each rating class. Switchgear Assemblies designed for continuous operation at N-Class 100% of their current rating without NEMA 1 Indoor (Sprinklerproof S-Class b NEMA SG5 - the Power need for Switchgear external heat sinks, and available) H-Class are in accordance with: Assemblies L-Class NEMA 3R Outdoor Walk-In UL 1066 Low Voltage AC and F-Class b Applicable requirements of the DC Power Circuit Breakers Used NEMA 3R Outdoor Non Walk-in National Electric in Enclosures Code (NEC) or electrically operated, fused or unfused and are available in the following rating classes. Refer to Tables on Page 12-4 for interrupt and withstand ratings for each rating class. N-Class S-Class H-Class L-Class F-Class Type WL Low Voltage Metal-Enclosed Switchgear WL drawout circuit breakers are designed for continuous operation at 100% of their current rating without the need for external heat sinks, and are in accordance with: b UL 1066 Low Voltage AC and DC Power Circuit Breakers Used in Enclosures b ANSI C37.13 Low Voltage AC Power Circuit Breakers Used in Enclosures ANSI C37.13 Low Voltage AC Power Circuit Breakers Used in Enclosures b ANSI C37.16 Preferred Ratings, ANSI C37.16 Preferred Ratings, Related Related Requirements, Requirements, and Application and Application for Low Voltage for Power Low Circuit Voltage Breakers Power and AC Power Circuit Protectors Circuit Breakers and AC Power Circuit ANSI C37.17 Trip Devices for AC Protectors and Purpose DC Low-Voltage b ANSI Power Circuit C37.17 Breakers Trip Devices for AC NEMA SG3 - Low Voltage Power and Circuit Breakers Purpose DC Low-Voltage Power Circuit Breakers Features and modifications required by b NEC NEMA are incorporated SG3 - when Low the Voltage assemblypower is Circuit designated Breakers as Service Equipment. Features Optional CSA and compliance modifications and certification required by NEC is available. are incorporated when the assembly UL Listing is designated as Service Equipment. Underwriters Laboratories listing mark (UL) is supplied for each vertical section CSA provided compliance all devices within and a vertical certification is section are UL Listed or UL Recognized available. and suitable for the intended use. All UL circuit Listing breaker drawout elements are UL Listed. Underwriters Labouratories listing mark (UL) Seismic supplied Qualification for each vertical section Seismic qualification to all major seismic provided construction all standards devices (UBC, within CBC, IBC, a vertical section SBC, BOCA are and UL IEEE 693) Listed available. or UL Recognized and suitable for the intended use. All circuit breaker drawout elements are UL Listed. cul Listed as per Standard for Switchgear Assemblies, CSA C22.2 No.31 Seismic Qualification Seismic qualification to all major seismic construction standards (UBC, CBC, IBC, SBC, BOCA and IEEE 693) is available. 12-2 Siemens Canada Limited Power Product Catalogue

Type WL Low Voltage Metal-Enclosed Switchgear Type Construction WL Low Details Voltage Metal-Enclosed Switchgear 6 7 Construction Details Assembly Construction Within the front compartment, each The Siemens Type WL switchgear Siemens Type WL metal-enclosed low breaker is barriered and compartmented assembly consists of one or more metalenclosed voltage switchgear is constructed of a from all other breakers in the front vertical sections. The end rigid internal frame structure that compartment. Standard finish color is light gray ANSI 61. (2) Bus compartment containing horizontal also and isolates vertical the busbreakers in sections are The designed Siemens to Type allow WL switchgear assembly minimizes The the standard possibility painting of damage process is a UL This design installation consists of future of sections. one or more metal-enclosed during vertical sections. consists The end of sections up to are designed installation system methods utilizing rolling a polyester or lifting. powder coat compartment. the load side runbacks connecting shipment approved electrostatic and supports powder multiple coat paint the front (3) Rear compartment cable compartment from the containing bus Each vertical four individually to allow enclosed installation breaker of future or sections. Lifting eyes paint. are The integrated completed into finish the has a nominal the load side of the breaker to the auxiliary compartments which are sized internal 2 frame mils dry design film thickness. and ensure the Optional load barriers cable can terminals be supplied to to provide uniform Each vertical height. section consists of up to four structural integrity of the lifting assembly isolate the bus compartment from the Included in individually each assembly enclosed are breaker various or auxiliary is always Assembly adequate Construction for the weight of the rear cable Within compartment. the front compartment, Other optional each breaker compartments which are sized to provide Siemens Type WL metal-enclosed low is barriered and compartmented from all components uniform such as height. circuit breakers, total structure. voltage switchgear is constructed of a barriers other include: breakers in the front compartment. instrumentation and control equipment, If requested rigid internal advance, frame the structure switchgear that minimizes can the be shipped possibility so of that damage the unit during one the section front compartment from the adjacent from the bus b Full This depth design section also isolates barriers the to breakers isolate in transformers, Included relays, in three-phase each assembly bus are variousstructure work, and all components internal wiring, such as connectors, circuit breakers, can be tilted shipment onto and its back supports during multiple installation section(s). compartment. This methods is an option rolling that or lifting. must Lifting b Barriers to isolate the incoming and other supporting instrumentation equipment. and control equipment, installation. In accordance transformers, with ANSI relays, C37.20.1, three-phase the bus be specified eyes are at order integrated entry. into the internal frame line Optional side connections barriers can to be the supplied main to isolate maximum temperature work, and all internal for parts wiring, that connectors, Each complete design and vertical ensure section the structural contains integrity breaker(s) the bus compartment from the load from side the bus rear and cable and other supporting equipment. of the lifting assembly is always adequate compartment. Other optional barriers are handled is 50 C. The main bus three compartments. connections in the switchgear section. for the weight of the total structure. include: (1) Full depth section barriers to maximum temperature In accordance rise with is ANSI 65 C C37.20.1, theb Front compartment containing (Line/load isolate one barriers section are from provided the adjacent as a section(s). feature (2) Barriers for to service isolate the incoming above 40 C maximum ambient. temperature The temperature for parts that breakers If requested and/or auxiliary in advance, equipment the switchgear standard rise of the are air surrounding handled is 50 C. the The cable main bus maximum points temperature is limited rise to 45 C is 65 C above 40 C horizontal can be and tilted vertical onto its bus back during instal- b Bus compartment structure can be containing shipped so that the unit connection equipment line side connections main breakers.) to the main breaker(s) from the load side bus and connections above 40 C ambient. The temperature rise of the air b Rear cable lation. compartment This is an option containing that must be in the switchgear section. (Line/load barriers Finish surrounding the cable connection pointsthe load specified side runbacks at order entry. connecting are provided as a standard feature for is limited to 45 C above 40 C ambient. service equipment main breakers.) During construction, the structural steel the load side of the breaker to the Each complete vertical section contains parts, panels, Finish and compartments are all load cable three compartments. terminals prepared for During painting construction, by a five-stage the structural steel (1) Front compartment containing breakers and/or 1 wash system. parts, panels, and compartments are all Standard finish prepared colour for is painting light grey by a ANSI five-stage auxiliary equipment wash system. 2 61. The standard painting process is a UL approved electrostatic powder coat paint system utilizing a polyester powder coat 1 Breaker Hoist and Track paint. The completed 2 Ventilation finish and Lifting has a Structure nominal 2 mils 3 Quarter dry film Turn thickness. Door Latch 4 Secondary Disconnect Access Door 5 Channel Sill Base (Optional) 1 Breaker 6Hoist Breaker and Compartment Track 2 Ventilation 7 Auxiliary and Lifting Instrument Structure Compartment 3 Quarter Turn 8 Secondary Door Latch Disconnect 4 Secondary 9 Breaker Disconnect Cradle (Guide Access Frame) Door 10 5 Channel Sill Breaker Base Drawout (Optional) Rail 11 TOC Switch Operator 6 Breaker Compartment 7 Auxiliary Instrument Compartment 3 4 12 Switchgear 8 11 9 10 5 3 Siemens Canada Limited Power Product Catalogue 12-3

12 SWITCHGEAR Low Voltage Switchgear Type WL Low Voltage Metal-Enclosed Switchgear Features & Benefits n Control and communication termination area located in front of equipment and segregated from power cable termination area that is located in rear of equipment n Front accessible vertical and horizontal wiring channels n No heat sinks on breaker or bus n No front-breaker door ventilation n 100kA bus bracing standard - 150kA and 200kA optional n Insulated/isolated bus through 6000 amps n Three levels of horizontal bus through 5000 amps n Modular design for maximum configuration flexibility n Breaker racking handle integral to the breaker n All breaker settings and displays clearly visible with breaker door closed Breaker Ratings Specifications n Field installable drop in place accessories and trip units n Same accessories work for entire breaker line n ModBus, ProfiBus and Ethernet communication n Field installable ground fault protection and zone selective interlock n Rogowski coil current sensors provide high metering accuracy and prevent saturation at high current levels n Dynamic Arc Flash Sentry (DAS) and EIP (Extended Instantaneous Protection) are patent pending features from Siemens that greatly reduce Arc Flash Energy n Optional arc resistant metal-enclosed low voltage switchgear designed and tested to provide an additional degree of protection for personnel performing normal operating duties in proximity to the energized equipment. Frame Size II Frame Rating 800 1600 2000 3200 Rating Designation N S H L F N S H L F S H L F S H L Interrupting Current I cs 254VAC 50 65 85 100 200 50 65 85 100 200 65 85 100 200 65 85 100 (kair RMS) 50/60 Hz 508VAC 50 65 85 100 200 50 65 85 100 200 65 85 100 200 65 85 100 635VAC 50 65 65 85 200 50 65 65 85 200 65 65 85 200 65 65 85 Short-time Withstand Current l cw (ka RMS) 50/60 Hz 0.5s 50 65 65 85 20 50 65 65 85 20 65 65 85 20 65 65 85 Extended Instantaneous 285- Protection 508VAC 50 65 85 100 200 50 65 85 100 200 65 85 100 200 65 85 100 (ka RMS - 0% to 20+%) 635VAC 50 65 65 85 200 50 65 65 85 200 65 65 85 200 65 65 85 Close & Latch Ratings (ka RMS) 50/60 Hz 50 65 65 85 75 50 65 65 85 75 65 65 85 75 65 65 85 Rating Plug Range 200A to 800A 200A to 1600A 200A to 2000A 200A to 3200A Endurance Rating (switching operations Mech. 15,000 15,000 15,000 15,000 with maintenance) a Elec. 15,000 15,000 15,000 15,000 Frame Size III Frame Rating 3200 4000 5000 Rating Designation M F H L M F H L M F Interrupting Current I cs 254VAC 150 200 85 100 150 200 85 100 150 200 (kair RMS) 50/60 Hz 508VAC 150 200 85 100 150 200 85 100 150 200 635VAC 85 200 85 85 85 200 85 85 85 200 Short-time Withstand Current l cw (ka RMS) 50/60 Hz 0.5s 100 40 85 100 b 100 40 85 100 b 100 40 Extended Instantaneous 254VAC Protection 508VAC 150 200 85 100 150 200 85 100 150 200 (ka RMS - 0% to 20+%) 635VAC 85 200 85 85 85 200 85 85 85 200 Close & Latch Ratings (ka RMS) 50/60 Hz 100 40 85 100 b 100 b 40 85 100 b 100 40 Rating Plug Range 800A to 3200A 800A to 4000A 800A to 5000A Endurance Rating (switching operations Mech. 10,000 10,000 10,000 with maintenance) a Elec. 10,000 10,000 10,000 amaintenance means: Replacing main contacts and arc chutes (see operating instructions). Main contacts in breakers with Rating Designation M can only be replaced by Siemens personnel. bdo not apply breaker at 635V AC on a system with available fault current > 85kA RMS. 12-4 Siemens Canada Limited Power Product Catalogue

Low Voltage Switchgear Type WL Low Voltage Metal-Enclosed Switchgear Main and Ground Bus The standard main bus is silver-plated copper. Tin-plated copper bus is optionally available. Vertical and horizontal bus bar utilize a channel shape design to maximize short circuit withstand capability and minimize heat rise. All bus joints include Grade 5 bolts and conical spring washers. Provisions for future extension of the main bus include plated joints and high tensile strength steel hardware. The main three phase horizontal bus is arranged vertically one phase above the other with edge-to-edge alignment to provide high, short circuit strength. Insulated main bus with isolated vertical bus is optional. Vertical bus ratings available are 1600, 2000, 3200, 4000 and 5000 amperes continuous current. Horizontal bus ratings available are 1600, 2000, 3200, 4000, 5000 and 6000 amperes. A neutral bus is furnished when specified, and can be rated 1600, 2000, 3200, 4000, 5000 or 6000 amperes continuous current. Control and Communication Wiring Standard control and communication wiring is #14 AWG extra-flexible, stranded copper type SIS. Terminations are made with compression-type, insulated terminals. Control and communication wiring is installed and accessed from the front of the switchgear structure. Each breaker compartment has a dedicated horizontal and vertical wireway. For devices not having screw-type terminals, pressure terminals are used. Insulation The insulation used is a UL recognized thermoset material that has excellent heat resistance, flame retardance, dimensional stability and low moisture absorption. 1 2 Construction Details Circuit Breaker Compartments Typical circuit breaker compartments include primary disconnects, drawout rails, secondary disconnects, vertical wireway, horizontal wireway and, if applicable, TOC switch operator, MOC switch operator and associated interlocks. Drawout rails allow the breaker to be withdrawn from the compartment without additional extensions or adapters. Up to six (2 sets of three) current transformers for metering or relaying can be mounted in each compartment. 3 4 12 Switchgear A standard copper ground bus extends through all sections. Cable lugs are mounted to the ground bus in each section. Standard short-circuit withstand (4 cycle) and short-time withstand (60 cycle) bus bracing is 100,000 amperes. Higher shortcircuit withstand bus bracings (150kA and 200kA) are available. Load side runbacks for feeder circuits are copper construction, are insulated with sleeve tubing in the main bus area, and are supported by high-strength bus bracing. 5 6 7 1 2 3 4 TOC Switch Operator Breaker Compartment Rear Barrier Secondary Disconnect Vertical Wireway 5 6 7 Interference Interlock Drawout Rails Primary Disconnect Circuit Breaker Cell Interior Siemens Canada Limited Power Product Catalogue 12-5

12 SWITCHGEAR Low Voltage Switchgear Type WL Low Voltage Metal-Enclosed Switchgear Options Siemens High Resistance Grounding System (1) The HRG section can be 22" or 32" wide. The HRG instrument compartment is 45" high and either 19" or 24" deep depending on whether the circuit breakers are fused. The HRG instrument compartment will house all of the high resistance grounding system components either on the door or in the device bucket except for the grounding resistors. (2) The grounding resistor assembly will mount in the rear cable compartment of the switchgear on the runback support posts. It will typically mount behind the HRG instrument compartment where it cannot interfere with feeder breaker runbacks. (3) In a typical Siemens HRG application with a close coupled main breaker section, a general purpose instrument compartment takes up the A compartment, the main breaker goes in the B compartment and the HRG instrument compartment takes up the C & D compartments. An alternate HRG main breaker section can have the HRG instrument compartment in the A & B compartments, main breaker in the C compartment and a general instrument compartment in the D compartment. Switchgear Mounted Hoist The integrally mounted hoist, standard on walk-in outdoor and optional on indoor switchgear enclosures, travels along rails on top of the switchgear to assist in breaker handling. TOC and MOC Switches The Truck Operated Cell (TOC) Switch provides interlocking control or remote indication of the breaker racking position. The cubicle mounted auxiliary switch or Mechanism Operated Cell (MOC) switch provides interlocking control or remote indication based on the main contact position (open or closed). Shutters These provide protection against accidental contact with primary disconnects in a compartment when the breaker is removed. Shutters automatically close when the breaker is withdrawn and are padlockable and field installable. Key Interlock This provides a mechanical means for operating circuit breakers and other devices only when predescribed conditions are met. Test Set A portable breaker test set is available as an option and supports testing the full range of functions and protective settings supplied with the breaker trip unit. Metering and Auxiliary Compartments Compartments are available to house devices such as voltage transformers, metering, control power transformers, and supervisory devices. Instrument and Control Transformers Voltage transformers and control power transformers are mounted in auxiliary compartments. These transformers are protected by primary pull-out type current-limiting fuses and secondary fuses. Current transformers are normally mounted on the compartment primary disconnect studs where they are readily accessible. Miscellaneous n Each switchgear lineup includes a breaker lifting device that is adjustable for use with Size II and Size III breakers n An optional portable breaker hoist is available if the integrated breaker hoist and track is not specified n A test cabinet is also available as an option. The test cabinet is wall mounted necessary equipment for testing electrically-operated breakers that have been removed from the breaker compartment. The test cabinet doesn t include or replace a breaker trip unit tester n 4" high formed steel channel sills are available for indoor switchgear enclosures Outdoor Switchgear Type WL switchgear is available in two outdoor (NEMA 3R) enclosures. Walk-in and non walk-in versions are available to meet your particular application. For protection from snow, rain and other foreign matter, both outdoor enclosures rest on a six-inch high, formed steel base which provides rigid support and a tight bottom seal. A heavy duty protective undercoating is applied to the underside of all outdoor enclosures to protect against moisture and corrosion. Shielded ventilation housings permit proper air circulation while excluding dirt and foreign matter. In the walk-in outdoor enclosure a lighted, unobstructed service aisle is provided at the front of the switchgear allowing inspection and maintenance without exposure to the elements. An access door equipped with an emergency bar release is located at each end of the aisle. The following features are standard with walk-in outdoor enclosures. (1) Space heaters in breaker compartment and bus compartment. (2) Screens and filters for exterior door ventilation louvers. (3) Incandescent lighting receptacle with three-way switch at each aisle access door. (4) Duplex receptacle with ground fault protection at each aisle access door. (5) Loadcentre for power distribution to lights, receptacles, switches and heaters. For non walk-in outdoor enclosures, space heaters and screens/filters for ventilation louvering are standard with lighting, receptacles, switches and loadcentres offered as options. Side View Rear View 12-6 Siemens Canada Limited Power Product Catalogue

Low Voltage Switchgear Type WL Low Voltage Metal-Enclosed Switchgear Dimensions Indoor Front Elevation View Indoor Floor Plan and Cable Space Details 1.25 (32) typ..86 (22) 4.42 (112).75 (19) typ..75 (19) typ. 1.50 (38) Transformer Throat.86 (22) 5.86 (149) 7.88 (200) 4.82 (122) 4.00 (102) B 12 Switchgear A Liquid filled & outdoor dry type transformers only C L 14.9 (378) Maximum available space in top or bottom of unit for customer's power cables (4) Holes for.50 (12mm) Grade 5 anchor bolts Space for secondary leads from above 2.00 (51) 5.00 (127) 4.00 (102) 1.00 (25) 2.12 (54) End Trim Panel (typ.) Required on left and right end of switchgear lineup adds 2 to total lineup width 3.00 (76) D Space for secondary leads from below 7.00 (179) C 2.37 (60) 4.40 (112) 1.00 (25) W 1.00 (25) 2.00 (51) W = 22 (559) or 32 (813) A Equipment Depth Direction of Cables B C D 60" Non-Fused with (N, S, H or L-Rating Breakers) Below 21.50 (546) 12 13.88 (353) 32.59 (828) OR 65" Fused with (F-Rating Breakers) Above 21.25 (540) 1 18.88 (480) 37.59 (955) 70" Non-fused with (N, S, H or L-Rating Breakers) Below 31.50 (800) 1 2 13.88 (353) 32.59 (828) OR 75" Fused with (F-Rating Breakers) Above 31.25 (794) 1 18.88 (480) 37.59 (955) 80" Non-fused with Below 41.50 (1054) 1 2 (N, S, H or L-Rating Breakers) Above 41.25 (1048) 1 13.88 (353) 32.59 (828) 80" Fused with Below 36.50 (927) 1 2 (F-Rating Breakers) Above 36.25 (921) 1 18.88 (480) 37.59 (955) Note: Dimensions shown in inches and (mm). 1 Reduce by 7.88" if upper neutral is present with cables above or if a lower neutral is present with cables below. 2 Reduce by 4.00" if an 800-3200A breaker is located in the bottom compartment. Reductions per notes 1 & 2 are additive. Example: cables below + lower neutral + 2000A breaker in bottom compartment = B-11.88. 3 Reduce cable space by 4.00" x 4.82" if Neutral Riser is present. (Consult Factory). 4 4.10 (104) if W=22; 4.60 (117) if W=32. Siemens Canada Limited Power Product Catalogue 12-7

12 SWITCHGEAR Low Voltage Switchgear Type WL Low Voltage Metal-Enclosed Switchgear Notes: n Any 22" wide section can be 32" wide if more conduit working room is needed n For bus duct connections if incoming is top, Compartment A must be blank/instrument, if incoming is bottom, Compartment D must be blank/instrument n Bused transition section is 22" wide n For close coupled transformer connections, Compartment A must be blank/instrument n Utility metering is always in a separate section. Section width is dependent on utility Note 1 If a 4000 amp feeder breaker is installed in Compartment C, Compartment D must be a Blank or Instrument Compartment. Note 2 If a 4000 amp breaker is installed in Compartment B, Compartment A must be a Blank or Instrument Compartment. Note 3 Contact Sales for application guidelines related to this design. Note 4 If a 3200 amp breaker is installed in Compartment B, the middle level through bus is not available. Note 5 If a 3200 amp breaker is installed in Compartment D, the lower level through bus is not available. Note 6 If incoming is bottom, feeder breakers can mount in compartments A and/or B. Note 7 If a 3200 amp breaker is installed in Compartment B, Feeder Breaker in Compartment A is limited to 1600 amp. Note 8 If a 3200 amp breaker is in Compartment BC, the maximum breaker in Compartment A is 1600 amp and if a 4000 amp breaker is in Compartment BC, the maximum breaker in Compartment A is 800 amp. Section Compartment Arrangement Main Sections Fused Breakers Main Sections Non-Fused Breakers Selection Switchgear Depth Dimensional Information (Dimensions below are for internal frames not total structure depth) n Non-fused indoor 60" standard, 70" and 80" optional n Fused indoor 65" standard, 75" and 80" optional n Non-fused non-walk-in outdoor 60" standard and 75" optional n Fused non-walk-in outdoor 65" standard and 75" optional n Non-fused walk-in outdoor 60" standard and 75" optional n Fused walk-in outdoor 65" standard and 75" optional n Walk-in outdoor aisle is 42" deep n Sections with cable connected main, tie and/or feeder breakers that are 3200 amp or greater must be minimum depth of 70" for unfused breakers and 75" for fused breakers. 12-8 Siemens Canada Limited Power Product Catalogue

Low Voltage Switchgear Type WL Low Voltage Metal-Enclosed Switchgear Selection Tie Sections Non-Fused Breakers Tie Sections Fused Breakers 12 Switchgear Main and Tie Sections Non-Fused Breakers Main and Tie Sections Fused Breakers Feeder Sections Non-Fused Breakers Feeder Sections Fused Breakers Siemens Canada Limited Power Product Catalogue 12-9

12 SWITCHGEAR Low Voltage Switchgear Type WL Circuit Breakers Rogowski Coil CT Technology A Rogowski coil is an air-core toroidal coil placed round the conductor. The alternating magnetic field produced by the current induces a voltage in the coil which is proportional to the rate of change of current. The direct output from the coil is given by Vout=M di/dt Where M is the mutual inductance of the coil and di/dt is the rate of change of current. To complete the transducer the voltage is integrated electronically so that the output from the integrator is a voltage that accurately reproduces the current waveform. Coil and Integrator: The combination of a coil and an integrator provides an exceptionally versatile current-measuring system which can be designed to accommodate a vast range of frequencies, current levels and conductor sizes. The output is independent of frequency, has an accurate phase response and can measure complex current waveforms and transients. Linearity: One of the most important properties of a Rogowski coil measuring system is that it is inherently linear. The coil contains no saturable components and the output increases linearly in proportion to current right up to the operating limit determined by voltage breakdown. The integrator is also inherently linear up to the point where the electronics saturates. Linearity makes Rogowski coils easy to calibrate because a transducer can be calibrated at any convenient current level and the calibration will be accurate for all currents including very large ones. Also, because of their linearity, the transducers have a very wide dynamic range and an excellent transient response. Coil Winding With a Rogowski coil it is important to ensure that the winding is as uniform as possible. A non-uniform winding makes the coil susceptible to magnetic pickup from adjacent conductors or other sources of magnetic fields. We have developed special machines for making accurate windings. Coils come in a range of styles including rigid and flexible coils but we have developed several other variations to meet specific needs. Output Indication The output from the integrator can be used with any form of electronic indicating device that has an input impedance greater than about 10kohm such as a voltmeter, oscilloscope, transient recorder or protection system. Split Coils Some designs of coil can be fitted on the conductor without the need to disconnect the conductor. Most flexible coils can be fitted this way and it is also possible to build split rigid coils. Split iron-cored devices such as current transformers are subject to appreciable amplitude and phase errors if the halves are misaligned by even a small amount. Rogowski coils do not have this problem. Misalignment of the joining faces of a split Rogowski coil has only a small effect on the amplitude and no effect on the phase. Electronic Trip Unit Selection Criteria for WL Circuit Breakers The basic criteria for selecting circuit breakers is: Maximum Available Short Circuit at the installation point. This value determines the short circuit current interrupting rating or short circuit current withstand rating of the circuit breaker. Rated Current In which is to flow through the respective circuit breaker continuously. This value may not be greater than the maximum rated current of the circuit breaker. The rated current for the WL is determined by the rating plug, up to the maximum frame rating. Ambient Temperature of the circuit breaker. This is usually the temperature inside the cubicle. Design of the circuit breaker. Protective Functions of the circuit breaker.these are determined by the selection of the appropriate trip unit. Dynamic Arc-Flash Sentry (Patent Pending) A unique feature of the WL trip unit allows the system designer to achieve lower levels of arc flash energy and delayed tripping for selective trip coordination purposes. Rating Plug The Rating Plug is a replaceable module that enables users to reduce the rated device current for optimum adaptation to the system; e.g., during startup of a plant section. The Rating Plug should be selected so that it corresponds to the rated current of the system. Switch-selectable I2t or I4t Characteristic Curve Improved Overload Protection. The best possible protection is assured when all protective devices in the system are optimally coordinated. To achieve optimum selectivity and coordination, the long-time characteristic can be switched between l2t and l4t, to improve coordination with fuses or inverse relays. Switchable Parameter Sets To allow the protection to adapt to changes in system needs such as switching between utility and generator feeds, WL Circuit Breakers support ETUs with two independent parameter sets. Switching between the parameter sets occurs in less than 100 ms and can be done remotely or via a contact input to an optional CubicleBUS module. 12-10 Siemens Canada Limited Power Product Catalogue

Low Voltage Switchgear Type WL Circuit Breakers Trip Unit Functions Selection 12 Switchgear Basic Protective Functions ETU745 ETU748 ETU776 Long-time overcurrent protection L U U U Short-time delayed overcurrent protection S U U U Instantaneous overcurrent protection I U -- U Neutral protection N U U U Ground fault protection G Additional Functions Selectable neutral protection U U U Defeatable short-time delay U U U Defeatable instantaneous protection U -- U Selectable thermal memory U U U Zone selective interlocking Selectable I 2 t or fixed short-time delay U U U Adjustable instantaneous pick-up U -- U Selectable I 2 t or I 4 t long-time delay U U U Adjustable short-time delay and pick-up U U U Selectable and adjustable neutral protection U U U Dual protective setting capability (DAS)* -- -- U Extended instantaneous protection U U U Parameterization and Displays Parameterization by rotary switches (10 steps) U U -- Parameterization by communication (absolute values) -- U U Parameterization by menu/keypad (absolute values) -- --- U Remote parameterization of the basic functions -- -- U Remote parameterization of the additional functions -- -- U Alphanumeric LCD - -- Graphical LCD -- --- U Metering Function Metering function Plus Communication CubicleBUS U U U Communication via PROFIBUS-DP Communication via the MODBUS Communication via the Ethernet (BDA) U standard -- not available optional 1 Fixed short-time delay only * DAS- Dynamic Arc Flash Sentry, Siemens patent pending protective feature Siemens Canada Limited Power Product Catalogue 12-11

Low Voltage Switchgear Type WL Circuit Breakers WL Communication Overview Connection Diagram 1 Breaker Data Adapter (BDA) 13 13 12 2 Browser-capable input and output device (e.g. notebook) WinPM.Net Server WinPM.Net Web Client Ethernet /Internet /Intranet SWITCHGEAR 3 WL Circuit Breaker 4 COM 16 MODBUS module or COM 15 PROFIBUS module Ethernet 5 Breaker Status Sensor (BSS) 6 Electronic Trip Unit 7 Metering function PLUS 8 Zone Selective Interlocking (ZSI) module MODBUS Master PLC or Supervisory Software 14 9510 Meter* (Ethernet Gateway) Optional MODBUS 8 9 10 11 12 15 BDA Plus* 9 Digital output module with relay or optocoupler outputs 10 Digital output module with relay or optocoupler outputs, remotely configurable 11 Analog output module 12 Digital input module 2 4 5 1 6 3 BDA 7 WL Circuit Breaker with COM 16 * The Siemens BDA Plus or meters, 9330, 9350, 95/9610 can be used as a gateway to enable Ethernet communication to the WL Circuit Breaker. 13 WinPM.Net on PC 14 PLC (e.g. SIMATIC S7) 15 BDA Plus Features n Industry standard MODBUS or PROFIBUS communication available on all WL breakers from 200A to 5000A n The high modularity of the WL Circuit Breakers and accessories allows simple retrofitting of all communication components n The ability to connect additional input and output modules to the breakerinternal CubicleBUS of the WL opens up a range of opportunities to reduce secondary device count and wiring and to increase functionality implemented in switchgear n Innovative software products for local configuration, operation, monitoring and diagnostics of WL Circuit Breakers using MODBUS, PROFIBUS or via Ethernet/Intranet/Internet n Complete integration of WL Circuit Breakers in all Totally Integrated Power and Totally Integrated Automation Solutions Metering Function/Metering Function PLUS The integrated metering function can be installed on all ETU745, ETU748, and ETU776 trip units and provides a viable alternative to external multifunction measuring instruments in many applications. Metering Function can measure the following: n Currents n Voltages n Power n Energy n Power Factor n Frequency All metered quantities are delivered as real time values with min/max recording. The metering module also contains additional alarm setpoint and protective relay functions (e.g. trip on overfrequency or undervoltage, and alarm on reverse power or over ampere demand). The Metering Function PLUS has two additional wave form buffers and supports harmonic analysis. With the two independent wave form buffers, the current and voltage waveforms can be recorded, and allows detailed diagnostic triggering on events. If the Metering Function /Metering Function PLUS is ordered together with the circuit breaker, it is already installed and ready for operation. As a retrofit part, the metering function is simply attached to the ETU and connected to the CubicleBUS. 12-12 Siemens Canada Limited Power Product Catalogue

Low Voltage Switchgear TPS3 Family of Hardwired Surge Protective Devices TPS3 Integral or Internally Mounted SPDs for Switchgear Siemens Integral TPS3 06 and L6 are UL 1449 3rd Edition SPDs that can be factory installed in Siemens WL low voltage metal-enclosed switchgear, utilizing optimal electrical system connections to minimize impedance losses. This results in the some of the industry s best installed Voltage Protection Ratings. These SPDs share the following features: TPS3 Features n UL 1449 3rd Edition and UL 1283 n UL Type 1 (consult factory) or Type 4 tested as Type 1 or 2 SPDs n 20 ka In (most models) n 200 ka SCCR (most models) n UL96A Lightning Protection Master Label Compliant n 100 500 ka surge current capacity per phase n EMI/RFI filtering or Sine Wave tracking n Monitoring LEDs, Audible Alarm, Dry Contacts, and Ground Integrity Monitoring Diagnostics TPS3 06 Product Overview 12 Switchgear Ordering Information Catalogue # TPS3 06 0 Voltage Code A = 120/240 V, 1Ø, 3W B = 120/240 V, 3Ø, 4W C = 120/208 V, 3Ø, 4W D = 240 V, 3Ø, 3W E = 277/480 V, 3Ø, 4W F = 480 V, 3Ø, 3W G = 600 V, 3Ø, 3W K = 380/220 V, 3Ø, 4W L = 600/347 V, 3Ø, 4W S = 400/230 V, 3Ø, 4W Surge Current (ka) 10 = 100 ka per phase 15 = 150 ka per phase 20 = 200 ka per phase 25 = 250 ka per phase 30 = 300 ka per phase 40 = 400 ka per phase 50 = 500 ka per phase X= Surge counter -- Example: TPS3C0640X0 = SPD for a 208/120 V low voltage switchgear with a surge current capacity of 400 ka per phase and a surge counter option -- When an option is not selected, include a zero (0) in the field True 10 Mode SPD Catalogue # TPS3 L6 0 Voltage Code A = 120/240 V, 1Ø, 3W B = 120/240 V, 3Ø, 4W C = 120/208 V, 3Ø, 4W E = 277/480 V, 3Ø, 4W K = 380/220 V, 3Ø, 4W S = 400/230 V, 3Ø, 4W Please consult the factory for applications requiring SPDs with larger per phase surge current capacities and/or 10-mode style configurations. Surge Current (ka) 15 = 150 ka per phase 30 = 300 ka per phase 45 = 450 ka per phase X= Surge counter -- Example: TPS3CL645XO = 10 mode SPD for a 208/120 V low voltage switchgear with a surge current capacity of 450 ka per phase and a surge counter option -- When an option is not selected, include a zero (0) in the field Siemens Canada Limited Power Product Catalogue 12-13

Low Voltage Switchgear Arc Flash Solutions Arc Resistant Switchgear n Insulated and isolated bus n Separation barriers and top venting n Breaker shutters 12 SWITCHGEAR Arc resistant metal-enclosed low voltage switchgear is an optional product offering that contains and channels internal arcing fault energy. This new switchgear construction provides an additional degree of protection to the personnel performing normal operating duties in close proximity to the equipment while the equipment is operating under normal conditions. In each of the descriptions below, additional design features are indicated, all of which aid in directing faults upward away from personnel or reduce the chances of a fault by insulating and isolating live parts. Front view Door gaskets and sealing trims Type 2B accessibility rating allows auxiliary/control compartment door to be open and still maintain arc resistant rating Extra hinges Thumb screw latches added One piece breaker door Enhanced sill channel with internal plenum for arc venting Breaker sealing frame maintains arc resistant rating with breaker in Connect, Test or Disconnect position. Rear view Pressure release vent in rear top cover Extra bolts and pressure dams in rear covers/doors Rear vent covers extended for vent flaps Extra bolts on end trim sheets 12-14 Siemens Canada Limited Power Product Catalogue

1 PANEL 1 SWGR 1 DLA: 1600 Man.: SIEMENS Type: WLL Size: WLL 800A Trip: ETU 776 LSIG Max A/Plug/Setting: 800 / 800 DLA: 1600 Man.: SIEMENS Type: WLL Size: WLL 1600A Trip: ETU 776 LSIG Max A/Plug/Setting: 1600 / 1600 Low Voltage Switchgear Arc Flash Solutions GRID GRID BUS 1 Dynamic Arc Sentry One of the trip units available for the Siemens WL Family of GEN 1 breakers is the ETU 776. It offers dual parameter BUS 2 sets that BUS 3 Vs:480 V enable the trip unit to automatically lower the instantaneous setting and thereby lower the available energy in a fault condition. Commonly referred to as maintenance mode, making a breaker trip faster while engaged in any form of mainte- Example 1 TX-4 SWGR 1 PPE: 3 AHE: 10.6 cal/cm^2(100%) AFB: 105.68 in WD: 24 in BUS 1 1600 WL 1600 TX-4 GEN 1 nance or just by being in proximity to energized equipment is BUS 2 BUS 3 Vs:480 V an effective way to minimize arc flash dangers. If one is concerned about the effects of temporarily inhibiting selectivity, then rest assured that with the ETU 776 single step changes are possible giving engineers the ability to clear faults faster with minimum effect on coordination. In the example below the effects of the DAS system may be seen. SWGR 1 PPE: 0 AHE: 0.74 cal/cm^2(100%) AFB: 17.38 in WD: 24 in 1600 WL 1600 12 Switchgear 800 800 800 600 600 600 800 800 800 WL WL WL WL WL WL 1000 PANEL 1 PANEL 2 PANEL 3 POWER PANEL 1 POWER PANEL 2 POWER PANEL 3 10 100 800 800 800 600 600 600 800 800 800 WL WL WL WL WL WL PANEL 1 PANEL 2 PANEL 3 POWER PANEL 1 POWER PANEL 2 POWER PANEL 3. 01.1 Time in Seconds.5 1 10 100 Current in Amperes X 100 1000 10000 480 Volt Phase Time-Current Characteristic Curves 02-15-2010 TCC 2 13:48:48 Parameter Set B Parameter set "A" Parameter set "B" C:\EDSA2005\Projects\DAS SWGR whitepaper.pdc WL Breaker with ETU 776 Dual Parameter sets enable maintenance mode - can be set remotely via software or automatically via digital input. Siemens Canada Limited Power Product Catalogue 12-15

Low Voltage Switchgear Arc Flash Solutions 12 SWITCHGEAR Under normal conditions, the switchgear s calculated arc flash energy will require PPE level 3 protection for anyone within the arc flash boundary. Incorporating the features built into the DAS system, and using the ETU776 trip unit, the system changes to parameter set B. In the second figure the instantaneous has been changed to a lower setting and the calculation shows a reduction of arc flash energy. The Example 2 resultant PPE level has been reduced to 0. Below is another example of the benefit of the DAS, or even manual switching, of breaker parameter set. The reduced settings set available in the ETU 776 can also be used to reduce the arc flash energy at downstream equipment. In the first figure on the left with normal settings the arc energy at panel 1 requires PPE level 2. After switching to the parameter B settings, the PPE level at Panel 1 is reduced to 0. SWGR 1 WL 1600 1600 WL 800 800 PANEL 1 PPE: 2 AHE: 5.9 cal/cm^2(85%) AFB: 47.36 in WD: 17.9 in Arc Flash in parameter A Arc Flash in parameter A Arc Flash in parameter B 12-16 Siemens Canada Limited Power Product Catalogue

Low Voltage Switchgear Arc Flash Solutions Remote operation and monitoring n Remote Monitoring for temperature, metering and maintenance data. n Remote Control via communications with or without interposing relays. n Remote Racking feature. n Remote Operation for opening and closing via local hand held pendant station. Remote Monitoring is an effective way to maintain separation between personnel and energized electrical equipment. With the latest equipment from Siemens, this is now easier and more cost effective than ever. Maintenance personnel and engineers can now view real-time electrical parameters, operating conditions (like temperature in the breaker and number of operations), and open and close breakers remotely. The WinPM.Net software with its Web Enabled interface allows multiple users to access only the information they are interested in from the convenience of their desks. Accountants can access cost allocation and utility billing information to enforce accountability for electrical resources and verify utility bills. Trip settings and other parameters for the LV power breakers can be modified and monitored remotely as well. In addition, WL breakers with appropriate electrical controls and communication components, can be opened and closed through communications directly or with the use of interposing relays. 12 Switchgear Unit sub #5 elevation Real-time data from WL breakers with remote open/close capability Siemens Canada Limited Power Product Catalogue 12-17

Low Voltage Switchgear Arc Flash Solutions 12 SWITCHGEAR Remote Racking Device Although it is always preferable to work on equipment that has been de-energized, in some cases it may not be practical. Siemens now offers the Remote Breaker Racking Device. This product uses an integral torque overload sensing mechanism and allows users to safely rack our WL breakers into the Connect, Test and Disconnect position from up to 30 feet away. This allows the operator to be outside the arc flash boundary thereby providing additional personnel protection and reducing the PPE requirements. This system can be retrofitted to existing Siemens WL switchgear lineups. Remote Racking Device Remote Operator Pendant This hand held pendant allows a user to remotely operate (open/close) a WL breaker without being in front of the switchgear. Standard cable lengths are 30 feet with other lengths available. This pendant, along with the Remote Racking device, can be used to improve personnel safety by putting operators outside the arc flash boundary. Maintenance personnel can remotely open breakers and close breakers, without being in front of the equipment. The Remote Operator Pendant can be used in combination with the Remote Racking Device for added personnel safety. Remote Operator Pendant Control port on WL Switchgear 12-18 Siemens Canada Limited Power Product Catalogue

Low Voltage Switchgear Arc Flash Solutions Other protection options n Infrared Viewing ports n Zone Selective Interlocking n High Resistance Grounding Infrared Viewing Ports Infrared viewing ports allow maintenance personnel to monitor temperatures of the cable and bus connection points in the rear of the gear while it is energized and under load. Excessive temperatures can be an indication of a problem with a connection. Infrared viewing ports 12 Switchgear Zone Selective Interlocking Zone Selective Interlocking eliminates any intentional time delay in the event a fault occurs between two breakers in adjacent zones. In the schematic to the right, representative time delay values are shown for the breakers in each zone. If a fault occurs on the load side of the downstream breaker, the ZSI system enables the upstream breaker s delay and allows the downstream device more time to independently clear the fault. If the fault occurs on the line side of the downstream breaker (between two zones), the delay in the upstream breaker will not occur. This allows the fastest tripping time for faults and will reduce the amount of arc energy which may be released. The ZSI function is available for short time delays and ground fault delays. High Resistance Grounding Research has shown that a high percentage of arc faults start as a phase to ground fault. High resistance grounding systems minimize the available phase to ground arcing current. A high resistance grounding system reduces the magnitude of phase to ground faults. This will reduce the mechanical stress on equipment for the most common of faults and will reduce the magnitude of energy released. Zone Selective Interlocking PH1 PH2 PH3 PH1 PH2 NEUT 3-CLF 2-CLF ROD TEST RELAY PULSE RELAY RES RES TEST RELAY PULSE RELAY TEST RESISTOR RES METER RELAY RES SYSTEM SWITCH RES RES SYSTEM SWITCH AM W NORMAL TEST RESISTOR RES METER RELAY RES W NORMAL WIRE LOOP FOR PORTABLE DETECTOR R FAULT AM R FAULT G PULSE WIRE LOOP FOR PORTABLE DETECTOR G PULSE CONTROL CIRCUIT PULSE SW CONTROL CIRCUIT PULSE SW Siemens Canada Limited Power Product Catalogue 12-19

12 SWITCHGEAR Secondary Unit Substations Overview Siemens offers a wide variety of unit substation designs to meet customer requirements. A unit substation consists of one or more transformers mechanically and electrically connected to and coordinated in design with one or more switchgear or switchboard assemblies. A secondary unit substation is defined as a unit substation whose outgoing section is rated below 1000 volts. A typical secondary unit substation consists of three sections: n Primary: an incoming section that accepts incoming high voltage (2400 to 13,800 volts) line n Transformer: section that transforms incoming voltage down to utilization voltage (600 volts or less) n Secondary: an outgoing section that distributes power to outgoing feeders and provides protection for these feeders (600 volts and less) Standard secondary unit substations consist of: n Medium Voltage Primary n Transformer n Low Voltage Secondary Siemens also offers low voltage unit substations with: n Low Voltage Primary n Transformer n Low Voltage Secondary The primary reason for using a secondary unit substation is to bring power as close as possible to the center of the loads. Another reason is that it provides a system design concept incorporating a wide variety of components that permits tailoring equipment to the needs of the application. A secondary unit substation provides n Reduced power losses n Better voltage regulation n Improved service continuity n Increased functional flexibility n Lower installation cost n Efficient space utilization Every component and assembly of secondary unit substations are designed and engineered as an integral part of a complete system. Primary Switch Primary Switch Liquid Filled Transformer Dry Type Transformer Switchboard with WL Encased Systems Breakers Type FC2 Switchboard with Fusible Switches Primary Switch Liquid Filled Transformer Type WL Low Voltage Switchgear For more information, please contact your local sales office. 12-20 Siemens Canada Limited Power Product Catalogue

Siemens Unit Substation Solutions Indoor Dry Type Transformer Sketch Page Plan view 38.0 38.0 Transformer 2 D Top and bottom conduit 58.0 12 Switchgear 48.4 1 Restricted Area 19.7 W Front view 19.7" (500 mm) 38" (965 mm) 38" (965 mm) Type FC2 switchboard digital meter type SPD module Unit space 100.4" (2,550 mm) 90" (2,286 mm) Section #1 Section #2 Primary Switch requires front access for top cable entry terminations. Transformer requires access from the front and 12 (305 mm) on the back side for ventilation space. Siemens Canada Limited Power Product Catalogue 12-21

Siemens Unit Substation Solutions Indoor Liquid Filled Transformer Sketch Page Plan view 32.0 (813 mm) 22.0 (559 mm) 22.0 (559 mm) SWITCHGEAR 12 D 48.4 (1,229 mm) H3 H2 Transformer2 X0 X3 X2 Maximum available space in top or bottom for customer's cables. 31.5 (800 mm) Maximum available space in top or bottom for customer's cables. 31.5 (800 mm) Maximum available space in top or bottom for customer's cables. 31.5 (800 mm) 70.0 (1,778 mm) 1 H1 X1 Space for secondary leads from above. Space for secondary leads from above. Space for secondary leads from above. 19.7 (500 mm) Space for secondary leads from below. Space for secondary leads from below. Space for secondary leads from below. Front view 32.0 (813 mm) 22.0 (559 mm) 22.0 (559 mm) W Metering/SPD Main breaker 100.4 (2,550 mm) Liquid filled transformer 102.2 (2,596 mm) Section #1 Section #2 Section #3 Primary Switch Primary requires Switch front requires access front for top access cable for entry top cable terminations. entry terminations. Transformer requires access from the front and 12" (305 mm) on the back side for ventilation space. Transformer requires access from the front and 12 (305 mm) on the back side for ventilation space. 12-22 Siemens Canada Limited Power Product Catalogue