Complete sets of MV equipment
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40.5kV C-GIS Gas Insulated Ring Main Unit
Complete sets of MV equipment
Three-phase shared gas tank structure, modular design concept. It can be divided into five modules: Secondary low pressure module, circuit breaker gas chamber module, cable chamber module, main bus gas chamber module and pressure release module.
Three-phase shared gas tank structure, modular design concept. It can be divided into five modules: Secondary low pressure module, circuit breaker gas chamber module, cable chamber module, main bus gas chamber module and pressure release module. Each gas chamber is independently connected. Single bus and double bus co-exist design. Single bus plan or double bus plan can be designed depending on the requirements of different plans.





S/N

Item

Unit

 parameters

1

Rated voltage

kV

40.5

2

Main bus rated current

A

1250~2500

3

Branch bus rated current

A

1250~2500

4

Rated short-circuit open current

kA

31.5

5

Rated filling pressure

kPa

130

6

Phase to phase, phase-to-ground/ isolating fracture, 1min power-frequency voltage test

kV

95/118

7

Phase to phase, phase-to-ground/ isolating fracture, lightning impulse

kV

185/215

8

1min auxiliary and control circuit insulation tests

kV

2

9

Out-of-phase earth fault breaking current

kA

27.4

10

Short-time withstand current

kA

Main loop and grounding switch (device) 31.5kA-4s

earth conductor and connection 27.4kA-2s

11

Peak withstand current

kA

Main loop and grounding device 80

Earth conductor and connection 69.6

12

Temperature-rise test


1.1*1250A、1.1*2500A

13

Mechanical operation test


Circuit breaker 10,000 times/ disconnector 3,000 times/ earthing switch 3,000 times

14

Enclosure protection class verification


IP4X

15

IP grade of gas tank


IPX7 (immersed)

16

Arc burning test


Switch chamber AFLR level 31.5kA-0.5s

Bus chamber AFLR level 31.5kA-0.5s

Cable chamber AFLR level 31.5kA-0.5s

Typical features:
1. Horizontal installation of direct-acting type three-position disconnecting switch.

2. All operating mechanisms are installed outside the gas chamber.
3. Complete interlocking protection function, ensuring safe operation.
4. Bus plug and switch system for connection between cabinets.
5. Maximum current of 3150A, breaking current of 31.5KA.


Automatic control:
1. Adopting PLC logical control unit.
2. Adopting latest communication technology.
3. Realize man-machine interactive operation interface.
4. Efficient protection and control capability.
5. Simple interface, easy to operate.


Environmental restrictions:
1. HV live parts are fully sealed in the stainless steel gas chamber and can fully adapt to any external environment.
2. Solid insulation and gas insulation technologies are adopted for live parts inside and outside gas chamber.
3. Inner cone sleeve plug mode is adopted for cable accessory to prevent water and dust.
4. All insulating material and sealing materials are adapt to a wide range of high and low temperatures.


Interlocking protection:
1. To prevent falsely opening or closing circuit breaker.
2. To prevent switching on/off the disconnecting switch with load.
3. To prevent closing ground switch when electrified.
4. To prevent closing circuit breaker with ground lead.
5. To prevent falsely entering live space.