The ZN12-12 type vacuum circuit breaker is a kind of 3-phase AC 50Hz indoor switchgear. Its rated voltage is up to 12V. This product is commonly used to control or protect switches in power plants, substations, and other power transmission and distribution systems. It is especially suited for the breaking of important loads and frequent breaking procedure.
Feature of the ZN12-12 Vacuum Circuit Breaker for Generator
1. The circuit breaker is simply constructed and mainly consists of vacuum interrupter, operating mechanism and supporting system.
2. Strong breaking capacity and complete functions
3. Long service life with rated breaking capacities of 20,000 times (for I-IV type) and 10,000 times (for V-X type)
4. Overvoltage protection device available, without any risk of explosion
5. Highly reliable and easy to repair
| Name | Unit | Model | |||||||||
| I | II | III | IV | V | VI | VII | VIII | IX | X | ||
| Rated voltage | 12 | ||||||||||
| Rated current | 1250 | 1600 | 2000 | 2500 | 1600 | 2000 | 3150 | 1600 | 2000 | 3150 | |
| Rated short circuit breaking current | 31.5 | 40 | 50 | ||||||||
| Dynamic current (peak) | 100 | 130 | 140 | ||||||||
| 4S Short-time thermal current (50kA for 3s) |
31.5 | 40 | 50 | ||||||||
| Rated short-circuit current( peak) | 100 | 130 | 140 | ||||||||
| Rated short-circuit breaking capacity | 50 | 30 | 12 | ||||||||
| Rated operating sequence | Open-0.3s-close/open-180s-close/open | Open-0.3s-close/open-180s-close/open | |||||||||
| Rated lightning impulse withstand voltage (full wave) | KV | 75 | |||||||||
| Rated short-time power-frequency withstand voltage (1min) | KV | 42 | |||||||||
| Closing time | ms | ≤75 | |||||||||
| Opening time | ms | ≤60 (50 ) | |||||||||
| Mechanical life | times | 20000 | 10000 | ||||||||
| Rated current breaking capacity | times | 20000 | 10000 | ||||||||
| Power of energy-storage motor | W | 275 | |||||||||
| Rated voltage of energy-storage motor | V | ≈110 220 | |||||||||
| Energy-storage duration | s | ≤15 | |||||||||
| Rated voltage of the closing electromagnet | V | ≈110 220 | |||||||||
| Rated voltage of the opening electromagnet | V | ≈110 220 | |||||||||
| Rated voltage of energy-storage shunt release | V | ≈110 220 | |||||||||
| Rated voltage of no-voltage release | V | ≈110 220 | |||||||||
| Rated current of over-current release | A | 5 | |||||||||
| Rated current of auxiliary switch | A | AC10 DC5 | |||||||||
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