MEDIUM VOLTAGE SWITCHGEAR AND CONTROLGEAR MODEL MS-E. IEC /12 /15 kv 25, 31.5, 40 ka

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1 SWITCHGEAR AND CONTROLGEAR MODEL MS-E IEC /2 /5 kv,, ka

2 The MS-E conforms to IEC standard and is designed and manufactured utilising Mitsubishi Electric state-of-the-art technology, fully taking into account present and future power system requirements. Mitsubishi Electric has manufactured hundreds of thousands of medium voltage Page FEATUR 3 panels over the last almost 60 years. With this experience, Mitsubishi Electric has gained a reputation of manufacturing up-to-date and reliable medium voltage panels, and possesses a supply record that comprises satisfied customers from all across the globe. APPLICATIONS STANDARD RATINGS CONSTRUION. ENCLOSURE AND PARTITIONS 2. BUSBAR 3. VACUUM CIRCUIT BREAKER () 4. FUSED VACUUM CONTAOR 5. AUTOMATIC SHUTTERS 6. CABLE COMPARTMENT / CURRENT TRANSFORMERS 7. WIRING 8. EARTHING BUSBAR SWITCHGEAR ARRANGEMENT. EXAMPLE 2. STANDARD SEION VIEW AND DIMENSIONS 3. FOUNDATION 3 STANDARD DIGN 8 MS-E with gas exhaust duct MS-E with gas screen ka internal arc fault test of MS-E at KEMA s Netherlands laboratory Type testing of the MS-E was first performed at Mitsubishi Electric s High Power Testing Laboratory in Japan, and then by an independent external testing and certification authority, KEMA, in the Netherlands.. ENCLOSURE AND STRUURE 2. BUSBAR AND CONNEING CONDUOR 3. EARTHING BUSBAR 4. CONTROL CIRCUIT WIRING 5. PHASE / POLARITY ARRANGEMENT AND COLOUR CODING 6. WITHDRAWABLE EQUIPMENT 7. WITHDRAWABLE EQUIPMENT POSITIONS 8. SAFETY INTERLOCKS 9. PAINTING AND COLOUR 0. NAMEPLAT. SURGE (SWITCHING) PROTEIVE DEVIC ACCSORI. STANDARD ACCSORI 2. OPTIONAL ACCSORI 3. EARTHING DEVIC 4. GAS EXHAUST DU 5. GAS SCREEN 2 OPTIONS 24 SWITCHGEAR AND CONTROLGEAR SWITCHGEAR AND CONTROLGEAR 2

3 FEATUR 2 APPLICATIONS HIGH RELIABILITY Type testing of the MS-E was performed by an independent external testing and certification authority, KEMA, in the Netherlands. MS-E is designed with the benefit of Mitsubishi s vast medium voltage panels production experience of hundreds of thousands of panels over the last almost 60 years. All components, such as current transformers, voltage transformers and multi-function relays are made of the highest quality materials. Heat stress analysis of the switchgear structure has led to a heat-resistant design in which circuit breakers up to A are self-cooled (i.e. cooling fans not required). The reduced number of parts reduces the chance of failure. Mitsubishi MS-E provide control and protection of the power supply to motors, transformers, capacitors and other feeder circuits. The MS-E is available at rated voltages of to 5 kv, with rated short-circuit breaking capacities from to ka. MS-E is designed for indoor use and is particularly suitable for electric power plants, substations, industrial plants, commercial buildings, pumping stations, pipeline stations and transportation systems. SAFETY Partitions between compartments and an automatic shutter system (for withdrawable equipment primary junctions) completely isolate live parts. Safe operation and maintenance is ensured with the adoption of comprehensive interlocking mechanisms. In the event of an internal arc fault, the MS-E is designed to withstand the huge pressure and burning effect of the arc. (Relief flaps located on top of the panel open to limit pressure.) Withdrawable equipments are inserted / withdrawn whilst the front panel door is closed so that any arc proof rating is not compromised (in line with IEC requirements). Multiple protection relay Control (low voltage) compartment EASY INSTALLATION Installation and testing duration are considerably reduced as the panel is tested and adjusted in the factory and then delivered as a complete unit. FLEXIBLE DIGN Panels with main circuit and control cable entry from either the top or bottom are available. PROTEION Mitsubishi MP or EMC Multiple Protection relays are installed as standard. The MP or EMC relay provides protection, measurement, communications and control functionality. Withdrawable vacuum circuit breaker Withdrawable fused vacuum contactor Reinforced inspection windows Self-cooled horizontal busbars Cable compartment Figure 2- MS-E panel Figure - MP Multiple Protection relay Figure -2 EMC Multiple Protection relay 3 SWITCHGEAR AND CONTROLGEAR SWITCHGEAR AND CONTROLGEAR 4

4 3. SWITCHGEAR AND CONTROLGEAR Ratings Type designation Applied standard Rated voltage 2 Rated frequency Rated insulation level 4 Short-duration power frequency withstand voltage, min. Lightning impulse withstand voltage Rated normal main busbar current Rated short-time withstand current, symmetrical [ka, rms] Rated peak withstand current [ka, peak] Rated duration of short-circuit [sec] Loss of Service Continuity category Internal Arc Classification 6 Accessibility type Arc test current Arc test current duration Location Ambient temperature Altitude a.s.l. Humidity R.H. Water vapour pressure Earthquake protection 7 Horizontal seismic withstand 8 Vertical seismic withstand [kv, rms] [Hz] [kv, rms] [kv, peak] [A, rms] [ka] [sec] [ C] [m] [%] [kpa] [m/s 2 ] [m/s 2 ] U r f r U d U p I r I k I p t k IAC MS-E IEC , ,,, 5,, 50 Hz: 2.5 I k, 60 Hz: 2.6 I k, 3 LSC2B-PM AFL, AFLR,, 0., 0.5, Indoor -5 ~ 000 max. 95 max. 2.2 average VACUUM CIRCUIT BREAKER Manufacturer Type designation Applied standard Rated voltage Rated frequency Rated normal current (self-cooling) Rated insulation level Short-duration power frequency withstand voltage, min. Lightning impulse withstand voltage Rated short-time withstand current Rated peak withstand current Rated duration of short-circuit Rated cable-charging breaking current Rated short-circuit breaking current Transient Recovery Voltage (TRV) Reference voltage Rate of Rise of Recovery Voltage (RRRV) Rated break time Rated short-circuit making current Rated control voltage Rated operating sequence Closing operation Motor current (at 0 V DC) Spring charging time Closing control current (at 0 V DC) Tripping control current (at 0 V DC) Auxiliary switch (contacts) Weight [kv, rms] [Hz] [A] [kv, rms] [kv, peak] [ka, rms] [ka, rms] [sec] [A, rms] [ka, rms] [kv] [kv/µs] [cycles] [ka, peak] [V DC] [A] [sec] [A] [A] [kg] U r f r I r U d U p I k I p t k I c I sc U a M Mitsubishi Electric 6/0-VPR-MMC IEC , 60,,, ,, 3 0,,, 3 63, 78.8, 00 48, 0, 220 O 3 min CO 3 min CO O 0.3 sec CO 3 min CO CO 5 sec CO (peak 6 A) Approx. 6 (after closing) a, 5b, A: A: 60 A: Hz: 2.5 I k, 60 Hz: 2.6 I k u c u c /t Type test 9 Withdrawable equipment 0 position Withdrawal / insertion method Maintenance access. High-voltage switchgear and controlgear-part : AC metal-enclosed switchgear and controlgear for rated voltages above kv and up to and including 52 kv kv and 5 kv apply to switchgear. 3. North American rating (range I, series II in IEC) kv rms ( kv peak) and 36 kv rms (95 kv peak) apply to switchgear. 5. A apply to kv and 2 kv switchgear. 6. Optional 7. General use, class B on the upper floor or roof of building according to JEM-TR Static acceleration of horizontal is 3.92 m/s 2 at base of structure. 9. Internal arc fault test. 0. Circuit breaker or Fused contactor or Voltage transformer. KEMA (Netherlands) Mid-mount External operation (with door closed) Front & rear, Front. Rated short-circuit breaking current ka 2 5 ka 3 2 ka North American rating (range I, series II in IEC). 3. A apply to kv and 2 kv switchgear. Figure 3- Withdrawable vacuum circuit breaker 5 SWITCHGEAR AND CONTROLGEAR SWITCHGEAR AND CONTROLGEAR 6

5 3. FUSED VACUUM CONTAOR Manufacturer Type designation Mitsubishi Electric MMFKVN 4 Applied standard Rated voltage Rated insulating voltage Rated frequency Rated operational current (self-cooling) Rated insulation level Short-duration power frequency withstand voltage, min. Lightning impulse withstand voltage Rated short-circuit breaking current [kv, rms] [kv, rms] [Hz] [A] [kv, rms] [kv, peak] [ka, rms] U r f r I e U d U p I sc IEC , 60, (Power fuse) The all-metal enclosure is completely earthed. Each compartment (control, withdrawable equipment, busbar and cable) is segregated from other compartments by earthed metal partitions. The front of the MS-E is divided into three kinds of compartments. The upper compartment is the control compartment, and the middle one is the withdrawable equipment compartment. The bottom-most compartment can be used for maintenance access. (See Figure 4-.) The multi-function relay (or meters, protective relays, control switches, etc.) is semi-flush mounted on the door of the control compartment. Rated control voltage [V AC/DC] U a 00, 0,, 220 Closing control current (at 00 V DC) [A] 4.8 Tripping control current (at 00 V DC) [A] 3.5 (Mechanical latch type) Auxiliary switch (contacts) 2a, 2b Operation system Electrical hold type, Mechanical latch type Weight [kg] M A: 90 0 A: 90 (for 3.3 kv) 00 (for 6.6 kv). Power fuse rating 20 A /x 50 A /b 00 A z/ 50 A zb A x/ A c/ 0 A v/ Contactor rating A w 0 A r Gas exhaust duct or gas screen (optional) Ventilator 2 Control compartment Withdrawable equipment compartment Busbar compartment Cable compartment Circuit breaker Earthing switch (optional) 3 Power cable Figure 4- Front compartments of MS-E (switchgear) Figure 3-2 Withdrawable fused vacuum contactor. Gas exhaust duct or gas screen required when Internal Arc Classification selected. Refer to p. 23 for more detail. 2. When the current within a compartment is A or greater, a ventilator is required for that compartment. However, not required if gas exhaust duct used. 3. Earthing truck is applied for 5 kv switchgear with I k > ka Load capacity selection table The main busbar is made of copper conductor. Voltage Unit type Motor Transformer Capacitor 2 (kw) (kva) (kvar) Voltage Unit type 3.3 kv 02F2VN 05F2VN 0F2VN 5F2VN 20F2VN 30F4VN F4VN kv 02F2VN 05F2VN 0F2VN 5F2VN 20F2VN 30F4VN F4VN 2. A series reactor must be provided. Motor (kw) Transformer Capacitor 2 (kva) (kvar) MS-E has bare busbars as standard. However, when required, the busbar can be insulated. Also, the main bus joints, such as the busbar joints between adjacent panels, can be shrouded with insulating covers. Other joints, such as those at the cable terminals, are covered with insulating tape. Connecting bars, such as those between busbars and circuit breaker bushings, or circuit breaker bushings and cable terminals, may also be optionally insulated. Figure 4-2 Main busbars (air-insulated) with tin plating 7 SWITCHGEAR AND CONTROLGEAR SWITCHGEAR AND CONTROLGEAR 8

6 3. VACUUM CIRCUIT BREAKER () The is easy to operate, with the closing spring charge indicator, the manual close and trip buttons, the operation counter and mechanical ON / OFF indicator all being located on the front of the circuit breaker. (See Figure 4-3.) The circuit breaker has two positions, Service and Test/Disconnected, and may be optionally padlocked at each position. When the is closed, the locks in each position by mechanical interlock. When the is opened, the interlock pin is released. The circuit breaker can be easily drawn out or inserted by a simple rotation action. (See Figure 4-3.) This is accomplished with the circuit breaker compartment door closed. Unauthorised racking can be prevented by padlocking the shutter for the draw-out handle aperture. The control circuit terminal of the circuit breaker is of manual connection type. The connector (see Figure 4-3) can be only attached when the is in the Test/ Disconnected position, and has the following mechanical interlocks. The circuit breaker cannot be inserted to the Service position when the control circuit terminals are not connected. The control circuit terminals cannot be disconnected when the circuit breaker is in the Service position. Circuit breakers of different ratings other than specified are mechanically prevented from being inserted into the Service position. 4. FUSED VACUUM CONTAOR The fused vacuum contactor is easy to operate, with the manual trip button for mechanical latch type, the operation counter and mechanical ON / OFF indicator all being located on the front of the fused contactor. (See Figure 4-4.) The fused contactor has two positions, Service and Test/Disconnected, and may be optionally padlocked at each position. When the contactor is closed, the fused contactor locks in each position by mechanical interlock. When the contactor is opened, the interlock is released. The fused contactor can be easily drawn out or inserted by a simple rotation action. (See Figure 4-4.) This is accomplished with the fused contactor compartment door closed. Unauthorised racking can be prevented by padlocking the shutter for the draw-out handle aperture. The control circuit terminal of the fused contactor is of manual connection type. The connector (see Figure 4-4) can be only attached when the fused contactor is in the Test/ Disconnected position, and has the following mechanical interlocks. The fused vacuum contactor cannot be inserted to the Service position when the control circuit terminals are not connected. The control circuit terminals cannot be disconnected when the fused vacuum contactor is in the Service position. Contactor of different ratings other than specified can be (optionally) mechanically prevented from being inserted into the Service position. Rating nameplate Rating nameplate Manual closing spring charging handle aperture Manual close button Operation counter Closing spring charge indicator Manual trip button for mechanical latch type Manual trip button Control circuit plug-in terminal Operation counter ON / OFF indicator ON / OFF indicator Racking truck Control circuit plug-in terminal Wheels Wheels Racking truck Power fuse Racking Auxiliary VT (optional) Vacuum Magnetic Contactor (VMC) Racking Front face-plate Figure 4-3 Vacuum circuit breaker details Figure 4-4 Fused vacuum contactor details 9 SWITCHGEAR AND CONTROLGEAR SWITCHGEAR AND CONTROLGEAR 0

7 5. AUTOMATIC SHUTTERS 6. CABLE COMPARTMENT / CURRENT TRANSFORMERS Inserting the withdrawable equipment into the Service position causes the shutters to automatically open. Drawing the withdrawable equipment out to the Test/Disconnected position causes the shutters to move and cover the primary junction contacts. Moulded-type current transformers are installed in the cable compartment. Figure 4-5 Shutters open Figure 4-6 Shutters closed Figure 4-9 Current transformers installed in cable compartment As shown below, the shutters operate on the busbar and cable sides. The shutters for the upper and lower primary junctions can be closed and opened individually, and can be (optionally) padlocked in the closed position. 7. WIRING Necessary control equipment such as auxiliary relays, terminal blocks and fuses are located in the control compartment. Ducting and bundling ensure that control wiring is systematic and neat. External control cable can be terminated to both sides of the compartment. Wiring to devices mounted on the door are protected from damage during opening or closing by vinyl tubing. Figure 4-7 Individual shutter operation Figure 4-0 Control compartment 8. EARTHING BUSBAR Figure 4-8 Optional padlocking of top and bottom shutters The earthing busbar is made of copper conductor. The shutters are made of metal and the following labels can be (optionally) provided. BUSBAR on shutter for busbar (line) side. CABLE on shutter for cable (load) side. The shutters can be (optionally) provided with a manually operated device to keep it in the opening position. The function of the device is cancelled by insertion of withdrawable equipment. MS-E has no plating earthing busbar as standard. However, when required, the earthing busbar can be optionally tin-plated. An earthing busbar is installed along the full length of the switchgear structure, with provision for earth cable connection at each end. The earthing busbar can be easily accessed from the front by removing the cover within the cable compartment. Figure 4- Earthing busbar (tin-plated) viewed from rear of panel SWITCHGEAR AND CONTROLGEAR SWITCHGEAR AND CONTROLGEAR 2

8 5 () / 2 / 5 kv, ~ ka MITSUBISHI MS-E SWITCHGEAR 3. EXAMPLE A. SINGLE-LINE DIAGRAM B. PANEL LAYOUT PF VMC Z : E. BUS: : LA: M: CR: : VT: Z: TR: VMC: PF: TR 3VT TR TR M M M M M M PF VMC PF VMC PF VMC Current Transformer Earthing Busbar Earthing Switch Lightning Arrester Motor CR suppressor Vacuum Circuit Breaker Voltage Transformer Zero-phase sequence Current Transformer Transformer Vacuum Magnetic Contactor Power Fuse CR LA 3VT TR Z Z Z Z Z Z Z LA 3VT CR Z E. BUS Z M M M Z Z TR 3VT LA 3VT 3VT 3VT CR 3VT LA Z PF VMC CR Z PF VMC PF PF VMC VMC Z TR M M M Z SWITCHGEAR AND CONTROLGEAR SWITCHGEAR AND CONTROLGEAR 4 Panel type Incomer Incomer + VT (fixed type) 2 2 Section view VT. Gas exhaust duct or gas screen (shown dashed) is required when Internal Arc Classification (IAC) be selected. 2. Arc proof ventilator (shown dashed) is required when AFLR of IAC be selected. 3. Depth given in parentheses applies when AFLR of IAC be selected. And if more than 2 cables / phase required, or is non-standard, then the depth will increase. 4. Height given in parentheses applies when IAC be selected. 0 S 0 S Rated voltage (kv) Shortcircuit current (ka) Rated current (A) Busbar Dimensions (mm) Width Depth 3 (D) Height 4 (H) Weight (t) Heat loss (2850) 2 (2850)

9 Panel type Section view Rated voltage (kv) Shortcircuit current (ka) Rated current (A) Busbar Dimensions (mm) Width Depth 3 (D) Height 4 (H) Weight (t) Heat loss Panel type Section view Rated voltage (kv) Shortcircuit current (ka) Rated current (A) or VT ratio Busbar / VT Dimensions (mm) Width Depth 2 (D) Height 3 (H) Weight (t) Heat loss Bus-tie Bus-tie + VT (fixed type) S 2 0 S (2 ) (2850) (2 ) 2 (2850) Outgoing feeder (transformer) Outgoing feeder (motor) VT (withdrawable) VT Z LA CR ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 3 VT 6/0 V 3 EVT V 3 VT 000/0 V 3 EVT V 3 VT 3/0 V 3 EVT V 2 (2850) 2 (2850) 2 () (2850) VT Gas exhaust duct or gas screen (shown dashed) is required when Internal Arc Classification (IAC) be selected. Depth given in parentheses applies in case of incoming VT. And if is non-standard, then the depth will increase. Height given in parentheses applies when IAC be selected. Required only for dry-type transformers.. Gas exhaust duct or gas screen (shown dashed) is required when Internal Arc Classification (IAC) be selected. 2. Arc proof ventilator (shown dashed) is required when AFLR of IAC be selected. 3. Depth given in parentheses applies when AFLR of IAC be selected. And if more than 2 cables / phase required, or is non-standard, then the depth will increase. 4. Height given in parentheses applies when IAC be selected. 5 SWITCHGEAR AND CONTROLGEAR SWITCHGEAR AND CONTROLGEAR 6

10 (2) kv, ~ ka MITSUBISHI MS-E CONTROLGEAR 6 Panel type Section view Rated voltage (kv) Shortcircuit current (ka) Rated current (A) Busbar VMC 2 Dimensions (mm) Width Depth 3 (D) Height 4 (H) Weight (t) Heat loss Steel thickness is a minimum of mm ~ / 0 / Side cover (both ends of arrangement) : 2.0 mm Frame: 2.0 mm Door: 2.0 mm Outgoing feeder 2 VMC x VT Z 2 ~ ~ / 0 / 0 / 0 / 0 2 (2850) Ceiling plate: 2.0 mm Bottom plate: 2.0 mm Internal partitions: mm Mounting plates: 2.0 mm Standard front door / rear cover Position Structure Hinge location Handle location Handle lock. Gas exhaust duct or gas screen (shown dashed) is required when Internal Arc Classification (IAC) be selected. 2. Two VMCs are built in one panel. 3. If is non-standard, then the depth will increase. 4. Height given in parentheses applies when IAC be selected. Front Hinged doors ( 3) Left Right Optional Rear Bolted covers ( 2) () / 2 / 5 kv, ~ ka MITSUBISHI MS-E SWITCHGEAR Panel Hole for main circuit cable and earthing cable VT (withdrawable) Panel Front space Rear space Front space Rear space () 700 () () 700 () () Hole for control cable Hole for control cable (2) kv, ~ ka MITSUBISHI MS-E CONTROLGEAR Degree of protection Enclosure: IP3X Internal partitions: IP2X Conductor material: copper (JIS H3) Surface treatment: tin plating at busbar joints Auxiliary apparatus: high voltage insulated wire Conductor material: copper (JIS H3) Surface treatment: none (bare) Standard dimensions: 6 mm mm VMC 2 Panel Front space () Hole for control cable Rear space 700 () Hole for main circuit cable and earthing cable Wiring system: duct or bundled Insulation: V heat-resistant plastic (PVC) Size:. mm 2 Colour: yellow, except for earth wire (green) Wire numbering: indicated by "tube" ferrule Ring-type crimp lug (with insulated sleeve) Rear space given in parentheses applies when AFL of IAC be selected. 2. Two VMCs are built in one panel. Wire number Polarity indicated by colour (optional) The VT / test terminals and terminal blocks shown below are adopted as standard. VT secondary secondary 7 Test terminals Terminal block SWITCHGEAR AND CONTROLGEAR SWITCHGEAR AND CONTROLGEAR 8

11 5. PHASE / POLARITY ARRANGEMENT AND COLOUR CODING Main circuit and control circuit arrangements are as follows: AC st 2 nd 3 rd phase phase phase 8. SAFETY INTERLOCKS Action Interlock Conditions Rack withdrawable equipment Operate Earthing Switch Open withdrawable equipment door Close withdrawable equipment door / VMC state OFF Withdrawable Withdrawable Control circuit equipment position equipment door connector Disconnected 2 Disconnected Closed Attached 2 Earthing Switch OFF Cable door Closed (Viewed from front to back, top to bottom, or left to right from front.) DC st wire 2 nd wire Positive Negative Open cable door Disconnect control circuit Close / VMC Disconnected Service / Disconnected ON (Viewed from front to back, top to bottom, or left to right from front.) Main circuit colour identification is achieved with vinyl tape or coloured label at bus end where main cables are connected. AC Unless specially requested, the control circuit is not colour coded. (Identifying colour tube markers, with the standard colours shown below, can be optionally installed.) AC 3-phase AC -phase DC Apparatus Vacuum Circuit Breaker Fused Vacuum Contactor Voltage Transformer Neutral st 2 nd wire wire Neutral Positive Negative The withdrawable equipment has the following two positions: Service : Main and control circuit Connected Test/ Disconnected : Main circuit Disconnected Control circuit Connected (manual disconnection possible) The front door can be opened / closed when the withdrawable equipment is Test/Disconnected position. Red Yellow Blue Red Yellow Blue Black Red Blue Black Red Blue 6. WITHDRAWABLE EQUIPMENT Main circuit Automatic connection (self-aligning) Control circuit Manual connection 7. WITHDRAWABLE EQUIPMENT POSITIONS Earthing circuit (Carriage frame) Automatic connection (earthing shoe). 2. Figure 6- Earthing switch and cable compartment door interlock The earthing switch can be optionally provided. Excludes VT panel. External enclosure surfaces Surfaces are first cleaned and pretreated for rust. Two coats of paint are then applied: first, acrylic epoxy, and finally, melamine enamel. Internal enclosure surfaces As for external except only first coat of acrylic epoxy, or alkyd primer, applied. Finish colour Enclosure: Iight grey (Munsell No. 5Y 7/). Frame, meter covers, control devices and protection relay cases: manufacturer s standard. Nameplates are of plastic with black lettering on white background, fastened by plastic rivets, and are the following sizes: Panel arrangement name: 63 mm 35 mm Panel section name: 6 mm 50 mm Load Protection device for switching surge of Door interlock 9. PAINTING AND COLOUR 0. NAMEPLAT Rotary machine (electric motor & generator) CR Suppressor Figure 6-2 position-door interlock (derived from shutter mechanism). SURGE (SWITCHING) PROTEIVE DEVIC Dry-type transformer Lightning Arrester Oil-immersed transformer Not required Door interlock Racking interlock 9 SWITCHGEAR AND CONTROLGEAR SWITCHGEAR AND CONTROLGEAR 20

12 7 Optional earthing devices are available for safety during cable and busbar maintenance and/ or inspection. The following two types of earthing device Draw-out handle for withdrawable equipment can be provided upon request with the MS-E. Manual charging handle for closing spring Test Terminals test plug set for secondary circuit of VT & Lifter with bucket for withdrawable equipment Earthing truck for switchgear An earthing truck with fault-making capability which has the same operating mechanism as the circuit breaker. Figure 7-3 Earthing truck Integral earthing switch Lifter In the case of cable-side earthing, the earthing switch is integrated within the cable compartment. A mechanical interlock between the earthing switch and circuit breaker (or fused contactor) is provided. Draw-out handle Manual spring-charging handle Test plug set Lifter with bucket Figure 7- Standard accessories Bucket Bus-side earthing switches are usually integrated within a VT panel, and so employ electrical interlocking with the adjacent panel s circuit breaker. The mechanical indicator for the earthing switch s state can be checked from the front of the panel through a small, circular inspection window. Control circuit extension cable for withdrawn / VMC ON / OFF testing Earthing switch operating handle Load cable terminal Earthing switch Figure 7-4 Rear view of earthing switch Figure 7-5 Earthing switch operation Control circuit extension cable Operating handle Withdrawable equipment compartment door Figure 7-2 Optional accessory ON Earthing switch Cable compartment door OFF Mechanical interlock (door openable when E.S. ON) Front Figure 7-6 Section view of earthing switch 2 SWITCHGEAR AND CONTROLGEAR SWITCHGEAR AND CONTROLGEAR 22

13 4. GAS EXHAUST DU For switchgear and controlgear requiring optional Internal Arc Classification (IAC), the gas exhaust duct must be fitted onto the top of panel. The gas exhaust duct ensure that 8 in the event of an internal arc fault, any hot gases or vapours are channeled away from personnel in the vicinity of the panel. CLASSIFICATION ITEM STANDARD DIGN SPECIAL SPECIFICATIONS AND/OR OPTIONS The gas exhaust duct may extend to the open air. The straight and maximum two meters design, which is standard, is available. The part of extension duct to reach to the open air will be supplied by others. The design guideline for them will be shown for consumer convenience. The gas exhaust duct is dismantled from the panels prior to shipping, and are re-attached on site. With gas exhaust duct, the switchgear and controlgear are designed to protect persons in the event of an internal arc fault of up to ka. Thus, in the event of internal arcing, there is no ejection of parts, no expulsion of hot gases (except from the gas exhaust duct) and the enclosure remains earthed. Minimum clearances of mm, 00 mm and mm from the panel to the room s ceiling, side walls and back wall, respectively, are required. Enclosure Degree of protection Padlocking facility for withdrawable equipment Position Shutters Internal Arc Classification (IAC) Accessibility type Arc test current Arc test current duration Cable entry Power Control IP3X Bottom Bottom IP3 IP32 IP4X IP42 Available Available AFL, AFLR,, ka 0., 0.5, sec Top Top Classification IAC AFLR signifies that the switchgear and controlgear are designed for access from the Front, Lateral ends and Rear by Authorised personnel only. AFL signifies that the switchgear and controlgear are designed for access from the Front and Lateral ends by Authorised personnel only. 5. GAS SCREEN The gas screen can be selected instead of the gas exhaust duct on condition that Busbars Plating Insulation Short-time withstand current Earthing busbar Plating Size Tin Bare,, ka rms ( sec.) 6 mm Silver Epoxy coat PVC,, ka rms (3 sec.) Tin 6 32, 6 mm ceiling height from floor of electrical room is 40 mm or over. Busbar compartment segregation between panels No segregation With segregation Cable lugs Specify type, size Gas exhaust duct Gas screen Main circuit Cable glands Specify type, size Cable termination material Heat-shrinkable material (Specify size and type) Wire type V, PVC, C (HIV ) Wire size / VT secondary: 2.0 mm 2 other:. mm 2 Control circuit Colour Yellow Extension gas exhaust duct Terminals Up to 5.5 mm 2 Terminal blocks Screw type (MITSUBISHI: Type TJX) (e.g. clip-on) Front Front. Tinned copper, heat resistant (JIS C 336) 23 Figure 7-7 Panel section with gas exhaust duct Figure 7-8 Panel section with gas screen SWITCHGEAR AND CONTROLGEAR SWITCHGEAR AND CONTROLGEAR 24

14 CLASSIFICATION ITEM STANDARD DIGN SPECIAL SPECIFICATIONS AND/OR OPTIONS Space heater power source Thermostat power source (for space heater) Interior lighting operated by Available door position switch Transparent plastic covers Available (behind door) (prevention of accidental contact with live parts) Equipment Integral earthing switch Available Earthing truck Available VT Fixed type (floor-mount) Withdrawable (mid-mount) Automatic Transfer System Slow speed (ATS) High speed Foundation bolts Available Channel base Available Secondary rating 5 A A Accuracy Measuring Protection for switchgear Class 0P20 Protection for controlgear 5P0 Burden Min. 5 VA Material Acrylic plastic Laminated plastic Nameplates Stainless steel Language English Measurement and Relay MITSUBISHI MP or EMC instruments and Protection Multiple Protection Relay protection relays SWITCHGEAR AND CONTROLGEAR

15 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO , JAPAN Safety Precautions Please read the instruction manual before using the device. G-99-7-C7685-B HQ 0803 Printed in Japan (MDOC) Revised publication effective Apr. 8. Superseding publication of Mar. 7. Specifications subject to change without notice.