China Wholesale Electrical Enclosure Cabinet Factory – GPN2S/GPN2E-40.5kV Cubicle type Gas Insulated Switchgear – Greenpower

Summary

Cubicle type Gas Insulated Switchgear(CGIS) is an indoor, factory-assembled, metal-enclosed, cubicle type gas-insulated switchgear for single busbar applications, including “Green Type” GPN2E-40.5, GPN2N-40.5 and “Standard Type” GPN2S-40.5.
The “Green type” GPN2N-40.5 is innovated to use pure nitrogen as insulation gas for the series product with Non-SF6 gas insulation technology, which has brought the genuine green environmental protection of gas insulated switchgear.
The “Green type” GPN2E-40.5 incorporates the advanced technologies of mixed gas-insulated ( SF6+N2 ) and vacuum breakers, allowing the equipment to operate in a more reliable and environmentally friendly manner.
The “Standard type” GPN2S-40.5 is of 100% SF6 insulated, high performance and easy use.
With modern digital manufacturing and automatic testing coupled with sensor, monitor and protection technology, CGIS is ideal fit for power distribution demands. CGIS is particularly suited to industries with high reliability requirements such as Power Networks, Mining, Rail Transportation, Petrochemical Plants, Wind Farms and Metropolitan Rail Systems.
Normal operating conditions
The switchgear is fundamentally designed for the normal service conditions for indoor switchgear to GB 3906, DL/T404 and IEC 62271-200. The following limit values, among others, apply:
Ambient air temperature
Maximum air temperature: +45℃
Minimum air temperature: -25℃
Daily average maximum temperature: +35℃
Humidity:
Daily average value of relative humidity: ≤ 95%
Monthly average value of relative humidity: ≤ 90%
Daily average value of water vapor pressure: ≤ 2.2×10-3MPa
Monthly average value of water vapor pressure: ≤ 1.8×10-3MPa
Altitude: ≤ 1000m
The ambient air is not significantly polluted by dust, smoke,
corrosive and/or flammable gases, vapours or salt.

Special service conditions
The product can also be applied for many special service conditions.
In case the service conditions exceed the normal service conditions, which are out of the standard GB 11022 and IEC 62271-1, please consult with GP in advance for confirmation:
Altitude higher than 1000m.
Higher environmental temperature.
Lower environmental temperature.
Others special environmental conditions.

Reduce greenhouse gas emissions
CGIS incorporates the advanced technologies of pure Nitrogen or mixed gas-insulated ( SF6 + N2 ) and vacuum breakers, a fundamental choice made by GP to assist in reducing the greenhouse effect. SF6 (sulphur-hexafluoride ) is on the list of greenhouse gasses in the Kyoto Protocol, with a Global Warming Potential ( GWP ) of 23,000. Many other medium voltage switchgear systems use SF6 gas as the only insulating medium. Leakage of SF6 gas from switchgear contributes to the threat of the greenhouse effect and associated climate change.
With our commitment to protection of the environment, CGIS helps reduce greenhouse gas emissions by utilising mixed gas-insulated technology together with vacuum switching technology.
A 100% or 50% reduction in SF6 is achieved by using Nitrogen ( N2 ) mixed gas-insulated breakers. Nitrogen is the largest component of air and its arc decomposition product is non-toxic. Joined together by plug-in connectors and the modular nature of the panels ensures ease of installation and extension without the need for extra gas handling activities on-site.

Advantage

●70% Reduction In Switchroom Size
An optimized electric field design combined with excellent insulating performance, results in a compact switchgear product that operates safely and reliably.
Save 70% space compared with air-insulated switchgear.
Retrofitting into existing switchroom is easy.
Reduce cost of substation land.
●Maximum Safety For Operator And Equipment
The minimum functional pressure of the cubicle is 0.00MPa(20℃ ). That means, even under such severe conditions, it still maintains the rated insulation level and keeps all its rated functionality. Thanks to the low pressure of gas, even if gas is escaping from the switchgear, the cubicle can still continue to be energized. Reliable electrical and mechanical interlocks are designed between the circuit breaker and three-position switch to prevent misoperation.
●Easy Installation/Low Operation And Maintenance Cost
Panels in the middle can easily be removed for maintenance without moving neighbouring panels, increasing availability.

Technical Parameters

Structure of the standard type GPN2S-40.5 and green type GPN2E-40.5

Standard type GPN2S-40.5kV

Green type GPN2E-40.5kV

1. Protection and control Unit
2. Low voltage compartment
3. VCB mechanism
4. Embedded pole vacuum circuit breaker
5. Low voltage compartment door
6. Gas density indicator
7. VCB gas tank
8. 3-position switch mechanism
9. 3-position switch
10. Main busbar

11. Main busbar gas tank
12. Front cover
13. Surge arrester
14. Pressure relief device of main busbar gas tank
15. Inner-cone cable bushing
16. Cable terminal
17. Cables
18. Rear cover
19. Pressure relief device of VCB gas tank
20. CT

IST 3-position mechanism

IST 3-position switch

GPN2S VCB gas tank

GPN2S-40.5 VCB

Structure of the standard type GPN2S-40.5 and green type GPN2E-40.5Structure of the GPN2N green type (No-SF6)

Green type GPN2N-40.5kV

1. Protection and control unit
2. Low voltage compartment
3. VCB mechanism
4. Embedded pole vacuum circuit breaker
5. Low voltage compartment door
6. Gas density indicator
7. VCB gas tank
8. 3-position switch mechanism
9. 3-position switch
10. Main busbar
11. Main busbar gas tank

12. Front cover
13. Surge arrester
14. Pressure relief device of main busbar gas tank
15. Inner-cone cable bushing
16. Cable terminal
17. Cables
18. Rear cover
19. Pressure relief device of VCB gas tank
20. CT
21. Earthing bar
22. Voltage transformer (optional)

Vacuum circuit breaker is fixed mounted, while its three-phase embedded poles are arranged vertically into the circuit breaker gas tank.
Due to the vacuum switching technology, an arc is limited in the vacuum interrupter, reducing the exhaust volume of insulation gas. Vacuum switching is of high performance in frequent short-circuit and numerous on-load switching applications.

PT installation

CT in cable compartment

Outline dimension of GPN2S-40.5kV standard type

Outline dimension of GPN2E-40.5kV green type