Ningbo Tianan (Group) Co.,Ltd.
Ningbo Tianan (Group) Co.,Ltd
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VS1(ZN63A)-12 Indoor AC High Voltage Vacuum Circuit Breaker
NINGBO TIANAN (GROUP) CO., LTD.
The structure of vacuum arc-extinguish room
Vacuum arc-extinguish room is the core parts from circuit breaker to support, connect and break current energy. It has sufficient arc-extinguish function and high operation duration.
The main parameter of 24KV circuit breaker
| Rated voltage | 24kV | ||
| Rated frequency | 50Hz | ||
| Rated lighting impulse withstand voltage | 125kV | ||
| Rated 1 min power frequency withstand voltage | 65kV | ||
| Rated operation sequence | O-0.3s-CO-180s-CO | ||
| Rated current (A) | 630,1250 | 1250,1600,2000,2500 | |
| Rated short circuit breaking current (r.m.s, kA) | 20/25 | 31.5 | |
| Rated short circuit making current (peak value, kA) | 50/63 | 80 | |
| Rated short time withstand current/short circuit continuous time (kA/s) | 20,25/4 | 31.5/4 | |
| Rated peak value withstand current (kA) | 50/63 | 80 | |
| Breaking times of rated short circuit(times) | 30 | ||
| Mechanical duration (times) | 20000 | ||
| Weight (kg) | Fixed type | ≤250 | |
| Truck type | ≤350 | ||
| Name | Unit | Data | |
| Distance of contact terminal | mm | 12±1 | |
| Over-travel | 4±1 | ||
| Three-phase opening & closing asynchronous | ms | ≤2 | |
| Tripping time of closing contact terminal | ms | ≤2 | |
| Closing & opening time | Opening | ms | ≤50 |
| Closing | ≤70 | ||
| Average opening speed(after opening 6mm) | m/s | 1.4±0.3 | |
| Average closing speed(after closing 6mm) | 0.8±0.2 | ||
Overview
The circuit breaker is identified by some national standards and international relative standards, such as GB1984,GB/T11022,DL/T403 and IEC62271, etc. It has reliable lockage, used as truck department or fixed installation department.
VT19-24indoor HV vacuum circuit breaker is used in the mining company ,power factory and substation,which is widely used in the rated current or multiple breaking short circuit current.