Ningbo Tianan (Group) Co.,Ltd.
Ningbo Tianan (Group) Co.,Ltd
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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 | ||