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.
- Insulation enclosure (1) of arc-extinguish room is made up of high intensity alumina ceramics material, both ends shall be welded stainless steel cover (6) and it will be formed into sealed cavity.
- Inner layer of arc-extinguish room is metal shied cover(5) which metal moist caused by arc can be compounded or condensed on the metal shied cover in short time during terminal making & breaking, insulation media intensity of inner arc-extinguish room will be recover. Meantime, shied cover can protect ceramics enclosure from hurt of metal splashing.
- Retracted stainless steel accordion pipe (4) is the important part of arc-extinguish room that moving terminal (3) can move in the fully-closed arc-extinguish room. Sealing function and long duration of accordion pipe is one of the main factors which decided the mechanical duration of vacuum arc-extinguish room.
- Terminal is the heart of vacuum arc-extinguish room, adopt chromium-copper, advanced smelt technology can ensure the breaking function and electric duration of vacuum circuit breaker, and decrease the operation over-voltage level.
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.
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Indoor AC High Voltage Vacuum Circuit Breaker VS1(ZN63A)-12 Circuit Breaker Images
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