products
HomeProductsEnvironmentally Friendly Gas Insulated Ring Main Unit

Environmentally Friendly Gas Insulated Ring Main Unit

Environmental Gas Cabinet
With the rapid development of smart grid, the application scope of environmentally friendly gas-insulated ring main unit has been greatly broadened. With the continuous advancement and improvement of technology, environmentally friendly gas-insulated ring main unit has gradually replaced traditional ring main unit. The current innovation and technological progress are mainly carried out around the switchgear in terms of safety, reliability, miniaturization, environmental protection and other requirements. SF6 gas is cancelled and green and environmentally friendly dry air is used. From the perspective of long-term development, based on the advantages of environmentally friendly gas-insulated ring main unit, it will definitely have new areas of development.
Production link: no pollutant emissions, operation link: the operation process is pollution-free and maintenance-free, end of life: most materials can be degraded and recycled, impact of operating environment: not affected by the operating environment, moisture, sand, and dirt will not affect the safe operation of the equipment. Because the high-voltage components are sealed in the box, the gas box protection level is IP67. Local electrical risk: the amount of epoxy resin used is very small, and it is only used at the cable connection sleeve, which can greatly reduce the risk of partial discharge and ensure the reliable operation of the equipment. Safety of operators: All high-voltage components are sealed in the gas box, and the stainless steel of the gas box is reliably grounded to ensure that the operator will not touch the high-voltage live parts. Safety of equipment operation: High-voltage components are sealed in the gas box, external environmental conditions will not affect equipment performance, and the state of the insulating medium can be monitored and adjusted on site.

  Project

Unit

Breaker

Load switchLoad switch-fuse combination
Rated voltage

kV

12

12

12

Rated current

A

630/1250

630

125

Rated current

Hz

50

50

50

 1mim power frequency withstand voltage (phase to phase)

 

42

42

42

Rated insulation level

  1mim power frequency withstand voltage (isolation break)

Power frequency withstand voltage (control and auxiliary circuit)

Lightning impulse withstand voltage (phase-to-phase and phase-to-ground)

Lightning impulse withstand voltage (isolation break)

Rated short-circuit breaking current

 

48

48

48

kV

2

2

2

 

75

75

75

 

85

85

85

KA

20/25

 

31.5

 Rated short-circuit making current

KA

50/63

50

80

 Rated short-time withstand current

KA

20/25

20/25

 

 Rated short circuit duration

S

4/3

4/3

 

 Rated peak withstand current

KA

50/63

50

 

AC current/transfer current

A

 

 

3150

Rated operating sequence

 

 

0-0.3s-CO-180s-CO

Rated gas pressure (gauge pressure at 20℃)

Mpa

 

   Normal pressure seal

Pressure release device release pressure (gauge pressure at 20℃)

Annual leakage rate

Mechanical life

Mpa

 

   0.16

 

 

   ≤0.01%

 

10000

10000

10000

Annual leakage rate

μΩ

≤150

≤150

≤300

The above parameters meet the technical specifications of the Class II grounding system of 12kV ring network switchgear of State Grid Corporation of China, China Southern Power Grid Corporation and Jiangsu Electric Power Company, and are fully compatible with different neutral point grounding methods.

With WTN series 12kV cable accessories, three-way cable connection combination or two-way cable plus one lightning arrester connection combination can be realized.
Note: Class I: neutral point grounding system through bottom resistance
Class II: neutral point grounding or ungrounded system through arc suppression coil.


×

Contact Us

captcha