Summary
KYH3-12s removable ac double-busbar metal-clad switchgear (switchgear for short hereunder) apply to 3.6kV～12 kV three-phase AC 50Hz power system, as a control and protection device of the load of the dual power radiation type electric supply system and use cables, overhead lines, transformers and capacitors as load. The switchgear conforms to GB3906、IEC60694, and with perfect and reliable anti misoperation function.
Technical specification
| No. | Item | Unit | Data | |
| 1 | Rated voltage | kV | 12 | |
| 2 | Rated current | A | 1250 | |
| 3 | Rated frequency | Hz | 50 | |
| 4 | Rated peak withstand current | kA | 80 | |
| 5 | Rated short-time withstand current | kA | 31.5 | |
| 6 | Duration of rated short circuit withstand current | s | 4 | |
| 7 | Rated short circuit breaking current | kA | 31.5 | |
| 8 | Rated short circuit making current | kA | 80 | |
| 9 | Rated insulation level | 1min P.F. Withstand | kV | phase to phase, phase to ground / isolating fracture：42/49 |
| lightning impulse withstand voltage | phase to phase, phase to ground / isolating fracture：75/85 | |||
| 10 | Voltage ofsubsidiarycontrol circuit | rated voltage | V | DC：220/110 ，AC：220/110 |
| 1min P.F. Withstand | V | 2000 | ||
| 11 | Protection grade | Enclosure:IP4X；open door:IP2X | ||
| 12 | Outline dimension（W×D×H） | mm | 800×2260×2300 | |
| 13 | Weight | kg | 1000 ～1500 | |
Main Structure
1. With the functions of distribution, metering, compensation, measurement and control, etc.;
2. Response timely and quickly, the compensation effect is good, reliable work, also can according to user s ’ requirements to add the leakage protector;
3. Automatic operation function: recloser;
4. Improve the power factor of the power grid.
Basic Structure
1. circuit breaker 2. flexible door mechanism 3.lower contact box 4.CB chamber
5. upper contact box 6. secondary air socket 7. isolation interlock chamber
8. meter chamber 9.small busbar chamber 10. pressure releasing pathway of CB chamber 11.busbar chamber
12.disconnector chamber 13. disconnector 14. busbar chamber
15. isolation chamber 16. pressure releasing pathway of cable chamber 17. disconnector
18.current transformer 19.earthing switch 20. cable chamber 21. cable clamp
| W | D | Note |
| 800 | 2200 | Cable inlet-outlet line |
| 1000 | ||
| 800 | 2400 | Overhead inlet-outlet line |
| 1000 |