Ningbo Tianan (Group) Co.,Ltd.
Ningbo Tianan (Group) Co.,Ltd
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VCB Fixed- Type Indoor Vacuum Circuit Breaker With High Voltage12KV/ 40.5KV
1. General Features
ZN12 -40.5 series indoor high voltage vacuum circuit breaker applied to power system that of 35KV three-phase AC 50HZ. It is using the longitudinal magnetic field contacts for the ceramic structure,the proliferation of breaking arc generated when current distribution in the contact on the same local melting phenomenon does not occur, but also has a low arc energy voltage (20-200V) and low chopping current (4-5A), and operate with high reliability organizations.
2. Environmental Condition
3. Technical Data
| No. | Item | Unit | Data |
| 1 | Rated voltage | KV | 40.5 |
| 2 | Rated current | A | 1250,1600,2000,2500,3150 |
| 3 | Rated frequency | HZ | 50 |
| 4 | Rated short time with stand current | KA | 25,31.5 |
| 5 | Rated short-circuit breaking current times | 20 | |
| 6 | Mechanical life | times | 30000 |
| 7 | Rated lightning impulse with stand voltage | KV | 185 |
| 8 | Rated operating sequence | O-0.3S-CO-180S-CO | |
| 9 | Raged voltage of closing and opening electromagnet | V | AC/DC220,110 |
| 10 | Rated voltage of no-voltage release | V | AC/DC220,110 |
| 11 | Rated short-duration power frequency withstand voltage (1min) | KV | 95 |
| 12 | Opening time | ms | 30≤t≤75 |
| 13 | Closing time | ms | 30≤t≤65 |
| 14 | Energy storage time | s | ≤15 |
4. Application
ZN12-40.5 series indoor high voltage vacuum circuit breaker is the main switch applying to KYN-40.5/GBC-40.5 series switchgear. As a movable unit, the circuit breaker is installed on the hand cart of switch cabinet. This kind also can be used for fixed mounting unit in XGN-40.5 switchgear.
This breaker was designed as a unit which gathering actuator andcircuit breaker main body. Special spring energy storage type operating mechanism can be used in AC / DC operation, manual operation.