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ZN39-40.5 type indoor HV vacuum breaker is used for many kinds of switchgear like JYN1-35 and GBC-35. It is widely used for 40.5kV voltage systems which is accordance with GB1984-2003 standards.
This series include: Vacuum circuit breaker truck, isolation truck and fuse truck;
Structural Characteristcis:
1. The vacuum circuit breaker adopts air insulation; it can meet air distance and creepage under normal ruuning condition;
2.the operating mechanism use CT19N type mechanism, the outlet curve has good adaptation with requirements of vacuum interrrupter. It has high reliable with characteristics of long life, easy maintance and free-maintenance for operationg mechanism;
3.The truck can be pushed in or out easily; compulsive mechanical interlock way is adopted; Meet "Five Prevention" function; Suitable for varies site and the working sites which have rigorous running condition;
Main Technical Specification
S.N | Name | Unit | Data | |||
1 | Rated voltage | kV | 40.5 | |||
2 | Rated frequency | Hz | 50 | |||
3 | Rated current | A | 1250 1600 | 1250 1600 2000 | ||
4 | Rated short circuit breaking current | kA | 25 | 31.5 | ||
5 | Rated peak withstand current | kA | 63 | 80 | ||
6 | Rated short-circuit duration | S | 4 | |||
7 | Rated power frequency withstand voltage | Between phases, phase to ground | kV | 95/1min | ||
Between gaps | ||||||
8 | Rated lightning impulse withstand voltage | Between phases, phase to ground | kV | 185 | ||
Between gaps | ||||||
9 | Rated operating sequence |
| 0-0.3s-CO-180s-CO | |||
10 | Power source voltage of opening and closing circuit | V | ~220/110;-220/110 | |||
11 | Rated breaking current of single capacitor bank | A | 630 | |||
12 | Rated breaking current of back to back capacitor bank | A | 400 | |||
13 | Electrical endurance class |
| ClassE1(20cycles) | |||
14 | Mechanical endurance | Cycle | (classM1)10000 | |||
15 | Operating mechanism type |
| CT19N | CD10II | ||
16 | Clearance between open contacts | mm | 22 ±2 | |||
17 | Contact stroke of contacts | mm | 6 ±1 | |||
18 | Out of simultaneity of CO operations of three poles | ms | «2 | |||
19 | Contact bouncing duration at closing operation | ms | «3 | |||
20 | Closing time | ms | 30~100 | |||
21 | Opening time | ms | 30~60 | |||
22 | Average closing speed | m/s | 0.6 ±0.2 | |||
23 | Average opening speed | m/s | 1.6 ±0.3 | |||
24 | Main circuit resistance of each pole | μΩ | «80 | |||
Truck Type Vacuum Circuit Breaker