12kv Mid Mount Middle Voltage Switchgear For Electric Power Distribution
12KV Mid - Mount Electric Power Distribution AC Switchgear
Overview
KYN28A-12Seiries Indoor AC Metal Clad Switchgear / Cabinet. It is suitable for three-phase AC rated voltage 12KV, rated frequency 50Hz power system to receive and distribute the electrical energy and to control, protect and monitor the circuit.
Meet the standard: GB3906-97 3-35KV AC Metal-enclosed Switchgear, GB11022-89 High-voltage Switchgear General Technical Conditions, IEC298 (1990) AC Metal-enclosed Switchgear and Control Equipment With Rated Voltage Above 1kv and 50kv or Below .
Application
The 12KV withdrawable enclosed switchgear is mainly used in power plants, small- and mediumsized power generators, industrial and mining enterprises, and secondary substations of power system for power receiving, power transmission, and startup of large-sized high-voltage motor in order to implement control, protection, and monitor.
Parameter
|
No. |
Item |
unit |
Parameter |
|
|
1 |
Rated voltage |
KV |
12 |
|
|
2 |
Main busbar rated current |
A |
630 |
|
|
3 |
Rated current |
A |
630 |
|
|
4 |
Rated frequency |
HZ |
50 |
|
|
5 |
Rated short-time withstand current |
KA |
20 |
|
|
6 |
Rated short time continual time |
S |
4 |
|
|
7 |
Rated peak withstand current |
KA |
50/125 |
|
|
8 |
Rated short-circuit making current |
KA |
50 |
|
|
9 |
Rated active load breaking current |
A |
630 |
|
|
10 |
Rated closed loop breaking current |
A |
630 |
|
|
11 |
Rated cable-charging breaking current |
A |
10 |
|
|
12 |
The earthing switch rated |
KA |
20 |
|
|
13 |
Grounding switch rated |
S |
4 |
|
|
14 |
Grounding switch rated |
KA |
50 |
|
|
15 |
Rating insulation level |
1min Power |
KV |
(phase to phase/ phase-to-ground) 42; |
|
lightning impulse |
KV |
(phase to phase/ phase-to-ground) 75; |
||
|
16 |
major loop resistance |
≤400 |
||
|
17 |
mechanical life |
Load switch |
time |
5000 |
|
Earthing switch |
time |
2000 |
||
|
18 |
subsidiary loop 1min Power |
KV |
2 |
|
|
19 |
SF6 Rated Gas pressure |
Mpa |
0.04 |
|
|
20 |
SF6 Gas annual Leakage rate |
1% |
||
|
21 |
Protection grade |
IP4X |
||
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