KYN28A-12 (GZS1) A.C METALCLAD REMOVABLE SWITCHGEAR FOR INDOOR USE CHINATCS

KYN28A-12 (GZS1) A.C METALCLAD REMOVABLE SWITCHGEAR FOR INDOOR USE CHINATCS 2001.09

KYN28A-12 (GZS1) A.C Metalclad Removable Switchgear for Indoor Use --------The Leader in Switchgear Up to 12kV 1. The cabinet is set up with the parts made of by aluminum-coated zinc plates. 2. Complete metalclad and isolated. 3. All operations can be carried out with the cubicle door closed. 4. The degree of protection of the enclosure is IP4X, which can prevent sundries and reptiles from entering. 5. Simple and reliable interlocking system can avoid misoperations. 6. Can be equipped with type ZN63A (VS1) and imported type VD4 vacuum circuit breaker. 7. Few maintenance for the vacuum circuit breaker and its operation device in the H.V compartment. 8. It is easy to replace circuit breaker, and the truck is provided with perfect interchangeability. 9. The cabinet can be mounted against the wall and maintenance can be carried out in front of the cubicles, thus less room required. 10. Easy connections for secondary circuit in the wiring channel with rich space. 11. Rich area for connection enough cables in cable compartment. 12. The cable compartment can be inspected easily through the front inspection window. 13. Quick earthing switch for earthling and short-circuit case. 14. Conforming to the standards of GB3906, DL404, and IEC298. KYN28A-12 (GZS1) 1

1 General 1.1 Summary Type KYN28A-12 (GZS1) A.C Metalclad Removable Switchgear manufactured by Tianshui Changcheng Switchgear Factory (called the switchgear or the switchgear in the following) which is indoor power distributing equipment of 3-phase, A.C 50Hz system, is suitable to be used to receive and distribute the electric power of 3.6 ~ 12 kv power system, as well as to control, protect and monitor the circuit. The switchgear conforms to the standards of GB3906, DL404, IEC298 and etc. The switchgear is provided with called 5-prevention function, that is: Prevent the circuit-breaker from misoperation; Prevent the truck from being pushed and pulled on-load; Prevent the earthing switch from being closed while the switchgear is electrified; Prevent the switchgear from being electrified with the earthing switch being closed; Prevent entering electrified compartment. The switchgear can be equipped with type ZN63A (VS1) as well as imported type VD4 vacuum circuit breaker. 1.2 Service Conditions The switchgear can meet the requirement specified in the national standard GB11022 as well as the requirement of condensation and dirty grade II. 2 Technical parameter 2.1 Technical Parameter of the Switchgear The technical parameter of the switchgear is shown in table 1. KYN28A-12 (GZS1) 2

Table 1 The Technical Parameter of the Switchgear Item Unit Data Rated voltage kv 3.6 7.2 12 Power frequency withstand voltage Rated kv 42 (1 min) (r.m.s) insulation Lightning impulse withstand voltage level kv 75 (full wave) Rated frequency Hz 50 Rated current A 630,1250,1600,2000,2500,3150 4s withstand current (r.m.s.) ka 20,25,31.5,40,50 Rated withstand current (peak) ka 50,63,80,100,130 Protection Enclosure IP4X degree With the door of circuit-breaker compartment open IP2X 2.2 The Technical Parameter of Type ZN63A Vacuum Circuit-breaker The Technical parameter of the type ZN63A vacuum circuit breaker is shown in table 2. Table 2 The Technical parameter of the type ZN63A vacuum circuit-breaker Item Unit Data Rated voltage ka 3.6, 7.2, 12 Power frequency withstand voltage 42 (1 min) (r.m.s) Rated Lightning impulse withstand voltage insulation kv 75 (peak value before breaking) level Lightning impulse withstand voltage 75 (peak value after breaking) Rated frequency Hz 50 Rated current A 630,1250,1600,2000,2500.3150 Single and back-to-bank capacitor bank breaking current A 630/400 Rated short-circuit breaking current 20,25,31.5,40,50 Rated short-circuit withstand current (4s r.m.s) 20,25,31.5,40,50 ka Rated short-circuit marking current (peak) 50,63,100,130 Rated peak withstand current 50,63,100,130 Rated operating sequence O-180s-CO-180s-CO Auto-reclosing operating sequence O-0.3s-CO-180s-CO Closing time 100 Opening time ms 50 Arcing time 15 Breaking times aganist rated short-circuit breaking current times 50 (30*) Mechanical endurance cycles 20000 Accumulating thickness of permissive consumption for fixed and movable contacts mm 3 Note:* The breaker times against rated short circuit breaking current is 30 times when the rated short circuit breaking current is 40kA. KYN28A-12 (GZS1) 3

2.3 The Technical Parameter of Operating device The technical parameter of operating device is shown in table 3. Table 3 Technical Parameter of Operating Device Rated voltage operating Item Unit Data Closing coil Opening coil V DC220, 110 AC220, 110 Power of coil Closing coil Opening coil W 245 Power of stored-energy motor W 70 Rated voltage of closing coil of stored-energy motor V DC220, 110 Energy storage time s 15 3 Overall Dimension and Weight 3.1 Cabinet The overall dimension and weight of cabinet is shown in Figure 1 and table 4. Table 4 The Overall Dimension and Weight of Cabinet Height A (mm) 2365 Rated current of sub busbar up to 1250A, raged short time Width B withstand current being 31.5kA 800 (mm) Rated current of sub busbar above 1250A 1000 Depth (mm) C Cable incoming and outgoing feeder 1500 Overhead incoming and outgoing feeder 1800 Weight (kg) 800 ~ 1200 KYN28A-12 (GZS1) 4

Fig 1 The overall dimension of the switchgear 3.2 Circuit Breaker The overall dimension of type ZN63A vacuum circuit breaker is shown in Figure 2(a) and Figure 2(b). Figure 2(a) The overall dimension of type ZN63A-12/1250-31.5 vacuum circuit breaker KYN28A-12 (GZS1) 5

Figure 2(b) The overall dimension of type ZN63A-12/3150-40 vacuum circuit breaker 4 Structure of Switchgear The switchgear consists of 2 parts of fixed cabinet and removable parts (called truck). The typical structure drawing of the switchgear is shown in Figure 3 and Figure 4. The enclosure and all partitions of each functional units are all made by aluminum-coated zinc plate. The degree of protection of the enclosure is IP4X, the degree of protection with the door of circuit-breaker compartment open is IP2X. The switchgear can be equipped with type ZN63A (VS1) vacuum circuit breaker, The switchgear can be arranged in double rows, that is, arranged in back-to-back or face-toface way. Because the switchgear can be installed and adjusted from the front, it can be installed against wall to save floor area as well as increase the safety of the switchgear and the flexibility for installation. 4.1 Enclosure and Partitions The enclosure and partitions of the switchgear is set up by aluminum-coated zinc plate which is machined and bent by NC machine, so the finished switchgears are provided with unity in size. The aluminum-coated zinc plate has excellent corrosion-proof and oxidationresistance function as well as high mechanical intensity, The switchgear is separated into circuit-breaker compartment, busbar compartment, cable compartment, and instrument compartment (LV compartment) by partitions. The enclosure for every unit is earthed reliably. KYN28A-12 (GZS1) 6

4.2 Truck The framework of truck is set up by thin steel plate through welding and riveting, the thin steel plate is processed by laser cutting machine. The truck can be divided into circuitbreaker truck, voltage transformer truck, measuring truck, and etc. the trucks with same specification can be interchanged. The truck has test position and service position inside the cabinet. The locking device is provided to every position in order to prevent the truck from being moved away from its position. The truck can not be removed unless the interlocking device being released. For example, the circuit-breaker truck can not be removed before the circuit-breaker opens. A ---- Busbar compartment B ---- Circuit breaker truck compartment C ---- Cable compartment D ---- Instrument compartment 1--Pressure releasing device; 2--Enclosure; 3--Branch busbar; 4--Busbar bushing; 5--Main busbar; 6--Fixed contacts device; 7--Fixed contacts box; 8--Current transformer; 9--Earthing switch; 10--Cable; 11--Surge arrester; 12--Main earthing busbar; 13--Partition; 14--Shutter; 15--Secondary plug; 16--Circuit-breaker truck; 17--Heater; 18--Removable partition; 19--Operating device for earthing switch; 20--Control busbar; 21--Cable cover Figure 3 Typical structural drawing of the switchgear (being installed free from wall) KYN28A-12 (GZS1) 7

A ---- Busbar compartment B ---- Circuit breaker truck compartment C ---- Cable compartment D ---- Instrument compartment 1--Pressure releasing device; 2--Enclosure; 3--Branch busbar; 4--Busbar bushing; 5--Main busbar; 6--Fixed contacts device; 7--Fixed contacts box; 8--Current transformer; 9--Earthing switch; 10--Cable; 11--Surge arrester; 12--Main earthing busbar; 13--Partition; 14--Shutter; 15--Secondary plug; 16--Circuit-breaker truck; 17--Heater; 18--Removable partition; 19--Operating device for earthing switch; 20--Control busbar; 21--Cable cover Figure 4 Typical structural drawing of the switchgear (being installed against wall) KYN28A-12 (GZS1) 8

4.3 Compartments 4.3.1 Circuit Breaker Compartment Special rail are located inside the circuit-breaker compartment for the truck to move and work in, the circuit-breaker can move between service position and test position in the rail. The shutter (14) is mounted on the rear wall of circuit-breaker compartment. The shutter (14) can open automatically during moving the truck from test position to service position, the shutter can close completely after moving the truck from service position to test position, which prevents the operators from touching the live parts. The truck can be operated with the cabinet door closed. Through the inspection window, the position of truck, the ON/OFF buttons (marking the circuit-breaker closing/opening) on the truck, ON/OFF mechanical position indicator can be observed as well as energy-stored/energy-released indicator can be observed clearly. 4.3.2 Busbar Compartment The busbar (5) is led from one switchgear to another, and fixed with branch busbar (3) and fixed contacts terminal box. All busbar can be sealed with thermal shrinkage insulation bushing in accordance with the requirement of users. Flat sub busbar is connected with fixed contact terminal box and main busbar by bolts without any other wire clips and insulators. The connecting bolts on the busbar can be enclosed with insulation bushing and cap. The busbar is fixed with busbar bushing (4) when passing through the partitions, which can prevent the default from extending to adjacent switchgear when internal arc appears, and increase the intensity of busbar. 4.3.3 Cable Compartment The current transformer (8) and earthing switch (9) can be mounted at the top, rear wall and front wall of the cable compartment, the surge arrester (11) can be mounted inside the cable compartment. The operator can enter the cabinet from front to mount the cable after the truck (16) and removable partition (18) being removed. Special cable connecting conductor is located in the cable compartment, the removable metal cable cover (21) with slot is located under the cable compartment, thereby, the cable connecting at site is made convenient. 4.3.4 LV Compartment Relays, protective elements, instruments, voltage indicators and secondary devices for special requirement can all be mounted in LV compartment. The control wires are placed in KYN28A-12 (GZS1) 9

the wire channel with enough area and closed with metal cover, the wire channel on the left side is designed for control wires, the wire channel for the secondary wire of the switchgear itself is located on the right side. 4.4 Interlocking Device The switchgear has reliable interlocking device, which can guarantee the safety of operators and the switchgear. It s function is as following: a) The truck can be moved from the test position to the service position only when the earthing switch is in open position. b) The circuit breaker can not be operated before the truck being locked in the test or the service position. c) The secondary plug can not be removed with the truck in the service position. d) The truck can not be moved from the test position to the service position with the earthing switch closed. e) The earthing switch can be operated only when the truck is in the test position. 4.5 Pressure Releasing Device The pressure releasing devices are designed in truck compartment, busbar compartment as well as cable compartment. When the air pressure inside the switchgear rises because of the internal fault arc appearing on the circuit-breaker or busbar, the special seal ring on the door can seal the front part of the cabinet, and the pressure releasing metal plate on the top can be opened automatically, thereby, the gas is given out and the pressure inside goes down, so the operators and the switchgear is in safety. 4.6 Interlocking between secondary plug and truck The secondary wires of the switchgear and truck are connected by secondary plug, the movable contacts of the secondary plug are connected with the truck by a nylon blowpipe, The secondary fixed contact holder is located on the top right of the truck compartment. The secondary plug can be pushed in and pulled out only when the truck is in the test position, on the other hand, the secondary plug is licked and can not be removed when the truck is in the service position. KYN28A-12 (GZS1) 10

4.7 Earthing Device The earthing copper plate (10mm x 40mm) is designed in the cable compartment, it can pass throng the neighboring switchgears and connected with the cabinet reliably. It is used for the parts to be directly earthed, because the cabinet is assembled by aluminum-coated zinc plate, the whole cabinet is earthed reliably, which makes the operators safe when they touch the enclosure. 5 Installation and Adjustment 5.1 Type of Foundation 5.1.1 The construction of foundation for installing the switchgears should conform to the Technical Specification for Electric Power Construction and Inspection. 5.1.2 The foundation for the switchgears should be cast for 2 times. For the first time, the foundation for the structural components used to install the switchgears such as angle steel, square steel or channel steel, should be cast; for the second time, the supplementary layer of concrete surface should be cast, the thickness of which is 60mm. The supplementary layer of concrete surface should be lower than the structural components used to install the switchgears for 1~3mm. 5.1.3 The foundation frame drawing is shown in Figure 5. 5.1.4 The foundation frame should be installed in order, the technical deviation for installing the foundation frame is 1mm/mm 2. 5.2 Installation of the Switchgear 5.2.1 The size of installing foundation and the installing size of the switchgear is shown in Figure 6 and Figure 7. 5.2.2 The operating corridor in front of the switchgears should be 2.5m when the switchgears are installed in single row; and the operating corridor between two rows of the switchgears should be 3m when the switchgears are installed in double rows. The installing drawing of switchgears installed face to face and against the wall is shown in Figure 8. 5.2.3 Move the switchgear to the specified position according to the requirement and drawings. If the switchgears in one roe is too many, the arrangement should begin an the center. KYN28A-12 (GZS1) 11

5.2.4 Special transporting tools, such as cranes and forks, are necessary, it is not permitted to use rollers and crowbars. 5.2.5 Pull the circuit breaker trucks out of the switchgears, and keep them appropriately. 5.2.6 Loosen the screws mounting the horizontal partition (18) under the circuit-breaker compartment, and remove the horizontal partition (18). 5.2.7 Loosen and remove the cable cover (21). 5.2.8 Remove the cover of the control wire channel on the left side of the switchgear, and the one on the right side. 5.2.9 Remove the hoisting plated and fastenings. 5.2.10 The rear cover of the switchgear and the cover of busbar compartment can be moved away for installing when the switchgear is installed from wall. 5.2.11 Install the switchgear on the foundation in accordance with specified sequence. The levelness in horizontal and vertical direction should not exceed 2mm. 5.2.12 After being combined (arranged) on the foundation, the switchgears should be connected with the foundation frame by foundation bolts or by welding. 6 Installation of Busbar The busbar in the switchgear are rectangular busbar and divided into sections, the busbar for switchgear with different current are only different from quantity and specification. The following should be complied with when installing the busbar. 6.1 Cleaning the busbar with soft cloth that is clean and dry, check whether there is damage on the insulating bushing, apply conductive paste or neutral vaseline on the connecting position of busbar. 6.2 Install the busbar in sequence, connect the sections of busbars and corresponding sub busbar together, insert proper pads and then screw down with bolts. KYN28A-12 (GZS1) 12

7 Earthing Device 7.1 Connect the earthing busbar (12) of all switchgear with prepared connection board. 7.2 Connect all earthing wires inside the switchgear. 7.3 Connect the foundation frame with the earthing plate. 7.4 Connect the earthing wire of earthing contact with the earthing busbar of the distributing panel. Width (A) Depth (B) M N L L1 800 1500 (cable incoming and outgoing) 1450 880 630 800 1800 (overhead incoming and outgoing) 1750 1040 1000 1500 (cable incoming and outgoing) 1450 880 830 1000 1800 (overhead incoming and outgoing) 1750 1040 Figure 5 The foundation frame drawing of the switchgear KYN28A-12 (GZS1) 13

Figure 6(a) The foundation drawing for the switchgears KYN28A-12 (GZS1) 14

Depth L 1500 1450 1800 1750 Figure 6(b) The foundation drawing for the switchgears KYN28A-12 (GZS1) 15

A-A The switchgears installed free from wall A-A The switchgears installed against wall C-direction Figure 6 (c) The foundation drawing for the switchgears KYN28A-12 (GZS1) 16

Width of the switchgear (A) 800 1000 Depth of the switchgear (b) L 1 L 2 L 3 1500(cable incoming & outgoing) 880 530 630 1500(overhead incoming & outgoing) 990 1500(cable incoming & outgoing) 880 730 830 1500(overhead incoming & outgoing) 990 Figure 7 Drawing for installing dimension of the switchgears KYN28A-12 (GZS1) 17

Figure 8 The installing drawing for the switchgears installed face-to-face against wall KYN28A-12 (GZS1) 18

8 Installation of Busbar Bridge The installing dimension of the busbar bridge is shown in Figure 9. Figure 9 The installing dimension of the busbar bridge 9 Installing dimension for overhead incoming scheme The installing dimension for overhead incoming scheme is shown in Figure 10. Figure 10 The installing dimension for overhead incoming scheme KYN28A-12 (GZS1) 19

10 Primary Circuit Scheme The primary circuit scheme of the switchgears is shown in table 5. 11 Secondary Circuit Scheme 11.1 The electric wiring diagram of circuit-breaker truck is shown is Figure 11. 11.2 The typical control circuit (AC operation) of the switchgear with ZN63A vacuum circuit-breaker (VCB) is shown in Figure 12. 11.3 The typical control circuit (DC operation) of the switchgear with ZN63A vacuum circuit-breaker (VCB) is shown in Figure 12. 12 Ordering Information Following information should be supplied when ordering: 12.1 Primary scheme serial No., primary scheme system drawings, arrangement drawings and layout drawings. 12.2 Secondary functional drawings, arrangement drawings of terminals. The terminals will be arranged in accordance with the standard mode by the manufacturer if the arrangement drawings of terminals are not supplied. 12.3 The type, specification and quantity of the electric components inside the switchgears. 12.4 Summary schedule of electric equipments. 12.5 The span across two rows of switchgears and height when busbar bridge (busbar bridge between tow rows of switchgears or the ones between the wall and swtichgear) is needed. 12.6 If the switchgears is used in special condition, it should be specified when ordering. 12.7 The kinds and quantity of extra accessories and spare parts requited. KYN28A-12 (GZS1) 20

The secondary electric diagram of the switchgear with DC control. (The switchgear without anti-jumping function, the circuit-breaker with anti-jumping function.) The secondary electric diagram of the switchgear with AC control. (The switchgear without anti-jumping function, the circuit-breaker with anti-jumping function.) No. Symbol Name 1 S1 Micro-switch for energy storage 2 S2 Auxiliary switch interlocked with the principal axis 3 K0 Intermediate relay 4 V1~V3 Rectifying elements 5 HQ Closing electromagnet 6 TQ Opening electromagnet 7 M Motor for energy storage 8 Y1~Y3 Electromagnet for over-current release 9 SW, YW Indicator for position of truck Figure 11(a) The Electric diagram of circuit-breaker (with anti-jumping function) KYN28A-12 (GZS1) 21

The secondary electric diagram of the switchgear with DC control (The switchgear with anti-jumping function, the circuit-breaker without anti-jumping function) The secondary electric diagram of the switchgear with AC control (The switchgear with anti-jumping function, the circuit-breaker without anti-jumping function) No. Symbol Name 1 S1 Micro-switch for energy storage 2 S2 Auxiliary switch interlocked with the principal axis 3 K0 Intermediate relay 4 V1~V3 Rectifying elements 5 HQ Closing electromagnet 6 TQ Opening electromagnet 7 M Motor for energy storage 8 Y1~Y3 Electromagnet for over-current release 9 SW, YW Indicator for position of truck Figure 11(b) The electric diagram circuit-breaker (without anti-jumping function) KYN28A-12 (GZS1) 22

KK:LW2-Z-a.4.6a.40.20/F8; LD,HD,UD(1LD,1HD):AD1-25/21 220V(XD5) HK:KN3-A 1Z1D; (HA,TA):LA18-22 1RD,2RD,3RD,4RD,HRD:RT19-16/6A SW,YW:F1-41/Y.H(The indication ;amp of truck position) The switchgear without anti-jumping function KK:LW2-Z-a.4.6a.40.20/F8; LD,HD,UD(1LD,1HD):AS1-25/21 220V(XD5) TBJ:DZ-52/220V;HK:KN3-A 1Z1D (HA,TA):LA18-22 1RD,2RD,3RD,4RD,HRD:RT19-16/6A SW,YW:F1-41/Y.H(The indication ;amp of truck position) The switchgear with anti-jumping function Figure 12 The typical control circuit for the switchgear equipped with type ZN63A vacuum circuit-breaker (AC operation) KYN28A-12 (GZS1) 23

KK:LW2-Z-a.4.6a.40.20/F8; LD,HD,UD(1LD,1HD):AD1-25/21 220V(XD5) HK:KN3-A 1Z1D; (HA,TA):LA18-22;ZG11-50W/1K 1RD,2RD,3RD,4RD,HRD:RT19-16/6A SW,YW:F1-41/Y.H(The indication ;amp of truck position) The switchgear without anti-jumping function KK:LW2-Z-a.4.6a.40.20/F8; LD,HD,UD(1LD,1HD):AS1-25/21 220V(XD5) TBJ:DZ-284/220V;HK:KN3-A 1Z1D (HA,TA):LA18-22;ZG11-50W/1K 1RD,2RD,3RD,4RD,HRD:RT19-16/6A SW,YW:F1-41/Y.H(The indication ;amp of truck position) The switchgear with anti-jumping function Figure 13 The typical control circuit for the switchgear equipped with type ZN63A vacuum circuit-breaker (DC operation) KYN28A-12 (GZS1) 24

Application example (1) of main circuit scheme Application example (1) of main circuit scheme KYN28A-12 (GZS1) 25

Table 5 Main Circuit Schemes Scheme serial No. 001 002 003 004 005 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 1 1 1 1 1 CT LZZBJ1-10GY LZZB1-10GY 2 2 2 3 3 LZZB-10GY VT RZL-10 REL-10 HV Fuse RN2-10 Earthing Switch JN15 1 1 1 Surge arrester Application Power receiving & Feeding Power receiving & Feeding Power receiving & Feeding Power receiving & Feeding Power receiving & Feeding Remarks Width of the switchgears is 1000m when their rated current is above 1600A. Scheme serial No. 006 007 008 009 010 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 1 1 1 1 1 CT LZZBJ1-10GY LZZB1-10GY 3 2 2 2 2 LZZB-10GY VT RZL-10 REL-10 HV Fuse RN2-10 Earthing Switch JN15 1 1 1 Surge arrester 3 Application Power receiving & Feeding Coupler (right) Coupler (right) Coupler (left) Coupler (left) Remarks Width of the switchgears is 1000m when their rated current is above 1600A. KYN28A-12 (GZS1) 26

Table 5 Main Circuit Schemes (Continuous) Scheme serial No. 011 012 013 014 015 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 1 1 1 1 1 CT LZZBJ1-10GY LZZB1-10GY 2 2 2 3 3 LZZB-10GY VT RZL-10 REL-10 HV Fuse RN2-10 Earthing Switch JN15 1 1 Surge arrester Application Coupler (right) Coupler (right) Coupler (left) Coupler (left) Overhead incoming (left coupler) Remarks Width of the switchgears is 1000m when their rated current is above 1600A. Scheme serial No. 016 017 018 019 020 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 1 1 1 1 1 CT LZZBJ1-10GY LZZB1-10GY 3 3 3 3 2 LZZB-10GY VT RZL-10 REL-10 HV Fuse RN2-10 3 3 Earthing Switch JN15 1 1 1 Surge arrester Application Overhead incoming (left coupler) Overhead incoming (right coupler) Overhead incoming (right coupler) Overhead incoming (left coupler) Overhead incoming (left coupler) Remarks Width of the switchgears is 1000m when their rated current is above 1600A. KYN28A-12 (GZS1) 27

Table 5 Main Circuit Schemes (Continuous) Scheme serial No. 021 022 023 024 025 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 1 1 1 1 1 CT LZZBJ1-10GY LZZB1-10GY 3 3 2 2 2 LZZB-10GY VT RZL-10 REL-10 HV Fuse RN2-10 Earthing Switch JN15 1 1 1 Surge arrester 3 Application Remarks Overhead incoming (right coupler) Overhead incoming (right coupler) Overhead incoming and outgoing 1. Width of the switchgears is 1000m when their rated current is above 1600A. 2. The depth of No.23, No.24 and No.25 is 1800mm. Scheme serial No. 026 027 028 029 030 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 1 1 1 1 1 CT LZZBJ1-10GY LZZB1-10GY 3 3 3 2 2 LZZB-10GY VT RZL-10 REL-10 RZL-10 2 RZL-10 2 HV Fuse RN2-10 3 3 Earthing Switch JN15 1 1 1 Surge arrester 3 Application Remarks Overhead incoming and outgoing Overhead incoming and outgoing Cable incoming & PT 1. Width of the switchgears is 1000m when their rated current is above 1600A. 2. The depth of No.26, No.28 and No.29 is 1800mm. Cable incoming & PT KYN28A-12 (GZS1) 28

Table 5 Main Circuit Schemes (Continuous) Scheme serial No. 031 032 033 034 035 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 1 1 1 1 1 CT LZZBJ1-10GY LZZB1-10GY 2 3 3 3 2 LZZB-10GY VT RZL-10 REL-10 RZL-10 2 RZL-10 2 RZL-10 2 RZL-10 2 RZL-10 3 HV Fuse RN2-10 3 3 3 3 3 Earthing Switch JN15 1 Surge arrester 3 3 Application Cable incoming & PT Cable incoming & PT Cable incoming & PT Cable incoming & PT Cable incoming & PT Remarks Width of the switchgears is 1000m when their rated current is above 1600A. Scheme serial No. 036 037 038 039 040 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 1 1 CT LZZBJ1-10GY LZZB1-10GY 2 2 LZZB-10GY VT RZL-10 REL-10 REL-10 3 REL-10 3 RZL-10 2 REL-10 3 RZL-10 2 HV Fuse RN2-10 3 3 3 3 3 Earthing Switch JN15 1 Surge arrester 3 Application Cable incoming & PT Cable incoming & PT Voltage measuring Voltage measuring Voltage measuring & arrester Remarks Width of the switchgears is 1000m when their rated current is above 1600A. KYN28A-12 (GZS1) 29

Table 5 Main Circuit Schemes (Continuous) Scheme serial No. 041 042 043 044 045 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 LZZBJ1-10GY CT LZZB1-10GY VT LZZB-10GY RZL-10 REL-10 REL-10 3 RZL-10 2 REL-10 3 RZL-10 2 RZL-10 2 HV Fuse RN2-10 3 3 3 3 3 Earthing Switch JN15 Surge arrester 3 3 3 Application Voltage measuring & arrester Voltage measuring & arrester Voltage measuring & arrester Voltage measuring & busbar coupler Voltage measuring & busbar coupler Remarks Width of the switchgears is 1000m when their rated current is above 1600A. Scheme serial No. 046 047 048 049 050 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 LZZBJ1-10GY CT LZZB1-10GY VT LZZB-10GY RZL-10 REL-10 REL-10 3 REL-10 3 RZL-10 2 RZL-10 2 REL-10 3 HV Fuse RN2-10 3 3 3 3 3 Earthing Switch JN15 Surge arrester 3 3 3 Application Voltage Voltage Voltage Voltage Voltage measuring & measuring & measuring & measuring & measuring & arrester & arrester & arrester & busbar coupler busbar coupler busbar coupler busbar coupler busbar coupler Remarks 1. Width of the switchgears is 1000m when their rated current is above 1600A. 2. The depth of No.69, No.70 is 1800mm. KYN28A-12 (GZS1) 30

Table 5 Main Circuit Schemes (Continuous) Scheme serial No. 051 052 053 054 055 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 LZZBJ1-10GY CT LZZB1-10GY VT LZZB-10GY RZL-10 REL-10 REL-10 3 HV Fuse RN2-10 3 Earthing Switch JN15 Surge arrester 3 Voltage Application measuring & arrester & Busbar coupler Busbar coupler Isolating busbar coupler Remarks Width of the switchgears is 1000m when their rated current is above 1600A. Isolating & coupler (left) Scheme serial No. 056 057 058 059 060 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 LZZBJ1-10GY CT LZZB1-10GY VT LZZB-10GY RZL-10 REL-10 RZL-10 2 RZL-10 2 HV Fuse RN2-10 3 3 Earthing Switch JN15 1 Surge arrester Application Isolating & (left) Isolating & Outgoing Outgoing Isolating & coupler & (right) coupler & converting converting (right) coupler voltage voltage phase phase measuring measuring Remarks Width of the switchgears is 1000m when their rated current is above 1600A. KYN28A-12 (GZS1) 31

Table 5 Main Circuit Schemes (Continuous) Scheme serial No. 061 062 063 064 065 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 CT LZZBJ1-10GY LZZB1-10GY 2 2 3 3 2 LZZB-10GY VT RZL-10 REL-10 RZL-10 2 RZL-10 2 RZL-10 2 RZL-10 2 REL-10 3 HV Fuse RN2-10 3 3 3 3 3 Earthing Switch JN15 Surge arrester Application Measure & left coupler Measure & right coupler Measure & left coupler Measure & right coupler Measure & left coupler Remarks Width of the switchgears is 1000m when their rated current is above 1600A. Scheme serial No. 066 067 068 069 070 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 1 1 CT LZZBJ1-10GY LZZB1-10GY 2 3 3 2 2 LZZB-10GY VT RZL-10 REL-10 REL-10 3 REL-10 3 REL-10 3 RZL-10 2 RZL-10 2 HV Fuse RN2-10 3 3 3 3 3 Earthing Switch JN15 Surge arrester Application Measure & right coupler Measure & left coupler Measure & right coupler Incoming & measure Incoming & measure Remarks 1. Width of the switchgears is 1000m when their rated current is above 1600A. 2. The depth of No.69, No.70 is 1800mm. KYN28A-12 (GZS1) 32

Table 5 Main Circuit Schemes (Continuous) Scheme serial No. 071 072 073 074 075 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 1 1 CT LZZBJ1-10GY LZZB1-10GY 2 2 2 3 3 LZZB-10GY VT RZL-10 REL-10 RZL-10 2 RZL-10 2 RZL-10 2 RZL-10 2 RZL-10 2 HV Fuse RN2-10 3 3 3 3 3 Earthing Switch JN15 Surge arrester Application Incoming & measure Incoming & measure Incoming & measure Incoming & measure Incoming & measure Remarks 1. Width of the switchgears is 1000m when their rated current is above 1600A. 2. The depth of No.71, No.75 is 1800mm. Scheme serial No. 076 077 078 Primary system diagrams Main Primary components Rated current (A) 630 ~ 3150 VCB ZN63A (VS1) VD4 CT LZZBJ1-10GY Capacitor LZZB1-10GY 3 BM12.7-16-1 LZZB-10GY VT RZL-10 REL-10 HV Fuse RN2-10 3 Transformer SC4-63/10 RN3-10 or RN1-10 1 3 RN3-10 or RN1-10 Earthing Switch JN15 Surge arrester 3 3 3 3 Application Incoming & measure Station transformer Capacitor protecting Note: 1. Width of the switchgears is 1000m when their rated current is above 1600A. Remarks 2. The depth of No.76 1800mm. When the power receiving & power feeding scheme is used as power receiving, the earthing switch should be taken out. KYN28A-12 (GZS1) 33