GIR-12 SF6 Gas Insulated Switchgear Metal Enclosed Switchgear GIS RMU Ring Main Unit

1

Rated voltage

KV

12

2

Rated frequency

Hz

50

3

1MIN power frequency withstand voltage (phase, relative ground / fracture)

KV

42/48

4

Lightning impact pressure (phase, relative ground / fracture)

KV

75/85

5

Rated current

A

630

125 *

630

6

Rated short circuit opening current

ka

-

31.5

20

7

Rated short-term resistance (4S)

ka

20

-

20/25

8

Rated peak tolerance

ka

50

-

50/63

9

Rated short-circuit combination current

ka

50

80

50/63

10

Mechanical life

次

5000

5000

10000

11

Rated SF6 gas pressure (20 ° C table pressure)

MPA

0.04

12

Protective level (melt, SF6 gas box / cabinet)

IP67 / IP4X

13

Internal arc (switch room and cable room)

20kA 1S / 25KA 1S

14

Annual leaf rate

%

≤0.01

The switch is operated by a dedicated operating handle, and the operation speed and strength of the contact are determined by the operating mechanism spring, and the change is changed due to the different operators. When the switch is hierarchically, the speed of the contact is rely on the speed and the arc gate to extinguish the arc, and the arc current is cut immediately.

The switch operation holes can be locked with a bright lock to prevent errors.

The switch main mechanism and grounding mechanism use spring storage operators, structural stability, less components, low failure rate, and significantly improved product reliability, and the mechanical life is as high as 10,000.

The key components use non-ferrous metal materials such as aluminum alloys. Other components use high-density carbon steel, treated by 8 steps, and finally baking highly attached outdoor military powder, ensuring institutional performance.

The mechanism interlock is directly fixed to the main body of the main mechanism and the ground mechanism, ensuring that the interlock indication is consistent with the actual position of the switch and prevents errors.

Electric operating mechanism: When a set of electric motors and attachments are installed on the basis of the original manual operating mechanism, it can be extended as an electric operating mechanism.

The switch adopts foreign technology. The key components use imported products, and the modular contacts are highly conductive and high-conducting tabs, the auxiliary silver process, so that their comprehensive conductive capacity is significantly improved, and the temperature rise is clearly smaller than the similar imported products.

Move, the static contacts are valid for 105mm, leading to the domestic leading, maximizing the insulation performance of the product under the zero table.

The FTU can be installed to realize the transient current speed, time-limited current speed, timing overcurrent, etc., and can remotely control the ring switch device.