12KV Indoor Withdrawable Vacuum Circuit Breaker 1250A VCB High Voltage AC For Switchgear
12KV Automatic Smart Types VCB Vacuum Circuit Breakers
Application:
For industrial and mining enterprises, power plants, substations and other transmission and distribution systems for the control and protection of electrical facilities, and suitable for frequent operation places.
Description of VS1-12KV indoor highvoltage vacuum circuit breaker:
VS1-12KV Model indoor AC high voltage vacuum circuit breaker is a type of holistic and completely sealed high voltage switchgear, it has compact dimension and small volume. The VCB applies to power system of rated voltage 7.2~12KV, three-phase and AC 50/60Hz. It is applicable in occasions with frequent operations, acting to protect and control line and electric apparatus. The product conforms to GB1984-2003, IEC56, , JB3855-1996 and DL/T403-1999 and passes type test.
Technology & Details:
Technical Parameters:
| Items | Unit | Date | |||
| Rated voltage |
KV |
12 | |||
| Rated impulse withstand voltage | 75 | ||||
| Rated short-time power frequency withstand voltage (1min) | 42 | ||||
| Rated frequency | Hz | 50 | |||
| Rated short-circuit breaking current | KA | 20 | 25 | 31.5 | 40 |
| Rated current | A |
630 1250 |
630 1250 |
1250 1600 2000 2500 |
1600 2000 2500 3150 4000 |
| Rated short-time withstand current | KA | 20 | 25 | 31.5 | 40 |
| Rated peak tolerable current | 50 | 63 | 80 | 100 | |
| Rated short-circuit making current (peak value) | 50 | 63 | 80 | 100 | |
| Secondary circuit power frequency withstand voltage (1min) | V | 2000 | |||
| Rated operation sequence | O－0.3S－CO 180S－CO | ||||
| Rated duration of short circuit current | S | 4 | |||
|
Rated single/back-to-back capacitance bank breaking current Set breaking current |
A | 630/400 (40KA is 800/400) | |||
| Rated capacitor bank Inrush making current | KA | 12.5 (Frequency≤1000Hz) | |||
| Opening time (rated voltage) | ms | 20～50 | |||
| Closing time (rated voltage) | ms | 35～70 | |||
| Mechanical life | times | 10000 | |||
| Rated short-circuit breaking current breaking times | times | 50 (40KA is 30) | |||
| Allowable wear accumulate thickness of moving and static contacts | mm | 3 | |||
| Rated closing operating voltage | v | AC110/220 DC110/220 | |||
| Rated opening operating voltage | v | AC110/220 DC110/220 | |||
| Rated voltage of energy storage motor | v | AC110/220 DC110/220 | |||
| Rated power of energy storage motor | w | 70 | |||
| Energy storage time | s | ≤15S | |||
| Contact opening distance | mm | 11±1 | |||
| Contact stroke | mm | 3.5±1 | |||
| Contact bounce time | ms | ≤2 (40KA≤3) | |||
|
Three - phase opening and closing heterogeneity |
ms | ≤2 | |||
| Average opening speed (front 8mm) | m/s | 0.9～1.3 | |||
| Average closing speed | m/s | 0.5～0.8 (40KA is 0.5～0.9) | |||
| Opening contact rebound amplitude | ms | ≤3 | |||
| Main circuit resistance | Ω |
≤50(630A) ≤45(1250A) ≤35(1600～2000A) ≤25(above 2500A) |
|||
| Closing contact pressure | N | 2400±200 (25KA) | |||
| 3100±248 (31.5KA) 4250±250 (40KA) | |||||
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