12KV Box Type & Fixed type Indoor AC Metal - Clad RMU Switchgear
General
XGT9-12 series switchgear is a kind of fixed indoor switch equipment with three-phase AC, air insulation. It can be equipped with FT8-12 indoor HV AC vacuum load switch, FT8-12R indoor HV AC vacuum load switch-fuse combination apparatus, VT28-12 indoor HV AC vacuum circuit breaker, used to control, accept and distribute the electrical energy in the 10kV single busbar system of three-phase AC, 50Hz; itself can control, protect, monitor and communicate circuits, is suitable for airport, subway, huge building, secondary substation, industry and mining enterprise and so on.
Service Condition
Altitude: Not more than 1000m;
Ambient temperature: +40℃~-25℃
Relative humidity: Daily average not more than 95%, monthly average not more than 90%;
No obvious pollution around, such as corrosive gas or combustible gas;
No recurrent, severe vibration.
Note: if deviating from the normal service condition, users can negotiate with the manufacturer.
Technical parameter
Electric parameter for load switch, load switch-fuse combination apparatus, circuit breaker
| No. |
Name |
Unit |
Parameter |
| Load switch |
Combination breaker |
Circuit breaker |
| 1 |
Rated voltage |
kV |
12 |
12 |
12 |
| 2 |
1min power frequency withstand voltage (virtual value) (interphase, to earth/fracture) |
kV |
42/48 |
42/48 |
42/48 |
| 3 |
Lightning impulse withstand voltage (virtual value) (interphase, to earth/fracture) |
kV |
75/85 |
75/85 |
75/85 |
| 4 |
Rated current |
A |
630 |
125 |
630,1250 |
| 5 |
Rated frequency |
Hz |
|
50 |
|
| 6 |
Rated short circuit breaking current |
kV |
|
31.5 |
20,25,31.5 |
| 7 |
Rated short-time withstand current/duration of short-circuit |
kV/s |
20/4 |
|
20/4,25/4,31.5/4 |
| 8 |
Rated peak withstand current |
kV |
50 |
|
50,63,80 |
| 9 |
Rated short circuit making current (peak) |
kV |
50 |
|
50,63,80 |
| 10 |
Rated operation sequence |
|
|
|
O-0.3s-CO-180s-CO |
| 11 |
Rated connecting (transferring) current |
A |
|
3150 |
|
| 12 |
Single capacitor bank/back to back capacitor bank rated breaking current |
A |
|
|
630/400 |
| 13 |
Rated no-load transformer breaking current |
|
1250kVA transformer no-load current |
|
|
| 14 |
Mechanical life |
Time |
|
10000 |
|
Mechanical characteristics parameter for load switch and circuit breaker
| No. |
Name |
Unit |
Parameter |
| Load switch |
Circuit breaker |
| 1 |
Rated voltage |
kV |
12 |
12 |
| 2 |
Rated short-circuit breaking current |
kA |
|
25 |
31.5 |
| 3 |
Contact pressure |
N |
1000±100 |
2400±200 |
3100±200 |
| 4 |
Clearance between open contact |
mm |
9±1 |
9±1 |
| 5 |
Over travel |
mm |
|
4±1 |
| 6 |
Average closing speed |
m/s |
0.6±0.2 |
0.6±0.2 |
| 7 |
Average opening speed |
m/s |
1.1±0.2 |
1.1±0.2 |
| 8 |
Bounce time of contact closing |
ms |
≤2 |
| 9 |
Opening and closing non-synchronism of 3-pole contact |
ms |
≤2 |
Product Tags:
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Ac Metal - Clad Rmu Indoor Switchgear 12kv Box Type & Fixed Type Xgt9-12 Series Images
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