Indoor high-voltage vacuum circuit breaker
Product Overview
The VS1 (ZN63)-24 series indoor high-voltage vacuum circuit breaker is an indoor high-voltage switchgear with a rated voltage of 24 kV and a frequency of 50 Hz for three-phase AC. It is suitable for use as a control and protection switch in transmission and distribution systems at power plants, substations, and industrial and mining enterprises, and is particularly well suited for applications in high-altitude areas where critical loads are switched and frequent operations are required.
The circuit breaker is manufactured in compliance with China’s national standards GB 1984-2003 “AC High-Voltage Circuit Breakers” and DL/T 403-2000 “Technical Specifications for Ordering Indoor Vacuum Circuit Breakers Rated 3.6–40.5 kV,” as well as relevant IEC standards, and features reliable interlocking functionality.
The circuit breaker’s operating mechanism is spring-energy-storage type, supporting both AC and DC energy storage operation as well as manual operation.
The circuit breaker can also be equipped with a long-life permanent-magnet operating mechanism, boasting a mechanical life of up to 10,000 operations, making it suitable for applications involving extremely frequent switching.
The circuit breaker is designed with a front-and-back modular structure, allowing it to be used either as a fixed-mounted unit or in combination with a chassis truck to form a center-mounted unit.
Terms of Use
● Altitude: not exceeding 2000 m
● Ambient temperature: maximum +40°C; minimum -15°C
● Ambient humidity: Daily average relative humidity: ≤ 95%; Monthly average relative humidity: ≤ 90%
● Earthquake intensity: less than 8 degrees
● Use in locations free from dripping water, fire hazards, explosion risks, severe contamination, chemical corrosion, and violent vibration.
Product Features
● Adopts a next-generation modular spring-operated mechanism, featuring a compact and simple structure, rational layout, reliable transmission, and convenient installation;
● Integrated design of the operating mechanism and the circuit breaker body; it can be used as a fixed installation unit or, when equipped with a dedicated pusher mechanism, configured as a handcart unit.
● The main electrical circuit shall primarily utilize insulated cylinders; alternatively, a solid-sealed pole configuration may be adopted.
● The circuit breaker is an E2-class circuit breaker;
● Comprehensive five-protection interlocking functions after cabinet assembly.
Technical Specifications
Project |
Unit |
Parameters |
||
Rated voltage |
kilovolt |
24 |
||
Rated frequency |
Hertz |
50 |
||
Rated current |
A |
630 |
1250 |
1600 |
Rated short-circuit breaking current |
kA |
20 |
25 |
31.5 |
Rated short-circuit making current (peak) |
kA |
50 |
63 |
80 |
Rated short-circuit duration |
S |
4 |
||
Rated short-circuit breaking current breaking operations |
times |
20 |
||
Rated Operating Sequence |
|
O-0.3s-CO-180s-CO |
||
Rated Lightning Impulse Withstand Voltage (Across Break) |
kilovolt |
125 |
||
Rated 1-min power-frequency withstand voltage (interrupting gap) |
kilovolt |
65 |
||
Closing time |
milliseconds |
≤100 |
||
Trip time |
milliseconds |
≤50 |
||
Mechanical life |
times |
20000 |
||
Rated Energy Storage and Operating Voltage |
V |
~220/110 |
||
Breaking time |
milliseconds |
≤65 |
||
Storage time |
S |
≤10 |
||
Mechanical characteristic parameters of circuit breakers
Project |
Unit |
Parameters |
||||||
Contact opening distance |
mm |
13±1 |
||||||
Contact overtravel |
4±1 |
|||||||
Center distance between electrodes |
275 |
|||||||
Permitted contact wear thickness |
3 |
|||||||
Average opening speed (after 6 mm of initial separation) |
m/s |
13 ± 0.3 |
||||||
Average closing speed |
0.6±0.2 |
|||||||
Contact closing bounce time |
milliseconds |
≤2 |
||||||
Three-pole closing and opening synchronism |
≤2 |
|||||||
Main circuit resistance |
Rated current |
kilovolt |
630 |
1250 |
1600 |
2000 |
2500 |
3150 |
Fixed |
microohm |
≤50 |
≤45 |
≤35 |
≤35 |
≤30 |
≤25 |
|
Handcart type |
≤55 |
≤50 |
≤40 |
≤40 |
≤35 |
≤30 |
||
Trip time |
milliseconds |
≤50 |
||||||
Closing time |
≤75 |
|||||||
Operating mechanism operating characteristics |
85%~110% rated voltage |
Reliable closing |
||||||
65%~120~rated voltage |
Reliable trip |
|||||||
≤300/rated voltage |
No trip allowed |
|||||||
External mounting dimensions
Contact Us
0411-83167110
No. 95, West Section of Shiji Road, Pulandian District, Dalian City, Liaoning Province
Leave a message to get a product quote.
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