Main Purpose
ZW32-12 series outdoor AC high voltage vacuum circuit breaker (hereinafter referred to as circuit breaker) is a kind of three-phase AC 50Hz outdoor power distributing equipment with rated voltage of 12kV, mainly used to make and break load current, overload current and short circuit current in power system. It’s suitable for protection and control of transformer substation and industrial and mining enterprise, especially for rural power grid and places in need of frequent operation.The circuit breaker has small volume, light weight, condensation prevention and maintenance-free features, and is adaptive to severe climate condition and dirty environment.
Model Implication
Product Standard
GB1984《AC High Voltage Circuit Breakers》
GB11022《Common Specifications for High-voltage Switchgear and Controlgear Standards》
GB311.1-6《Insulation Co-ordination for High Voltage Transmission and Distribution Equipment》
GB763《Heating under Long-Term Wok for AC High Voltage Appliances》
GB2706《Dynamic & Thermal Stability Test Methods for AC High Voltage Appliances》
GB3309 《 Mechanical Test at Ambient Temperature for High-Voltage Switchgear 》
DL/T593《Common Specifications for High-voltage Switchgear and Controlgear Standards》
Main Technical Parameters
No. | Item | Unit | Parameter |
1 | Rated voltage | KV | 12 |
2 | Rated frequency | Hz | 50 |
3 | Rated current | A | 630 |
4 | Rated short circuit breaking current | KA | 20 |
5 | Rated peak withstand current (peak) | KA | 50 |
6 | Rated short-time withstand current | KA
| 20 |
7 | Rated short circuit making current (peak) | KA | 50 |
8 | Mechanical life | time | 10000 |
9 | Rated short circuit breaks number | time | 30 |
10 | Power frequency withstand voltage (1min): (wet) (dry) phase-to-phase, phase-to-earth/ isolating distance | KV | 42/48 |
11 | Lightning impulse withstand voltage (peak) phase-to-phase, phase-to-earth/ isolating distance | KV | 75/85 |
12 | 1min power frequency withstand voltage of secondary circuit | KV | 2 |
Outline and Installation Size
