Audited Supplier
The ZW32-12 outdoor high voltage vacuum circuit breaker, affectionately known as the 'circuit breaker,' is an exemplary outdoor distribution switchgear designed to operate at a rated voltage of 12kV with a robust three-phase AC of 50Hz. This versatile circuit breaker skillfully handles the interruption and connection of load current, overload current, and short circuit current within the power grid. It boasts advanced overload and short circuit protective capabilities, seamlessly fulfilling control and measurement specifications while delivering sophisticated remote control and monitoring functionalities. Its broad usage spans substations, industrial settings, and mining enterprise distribution systems, providing unparalleled control and operation-ideal for environments with frequent operations.
Structural features:
Crafted with precision, the circuit breaker showcases a three-phase pillar dry design;
Engineered with a fully enclosed structure, it offers superior sealing, exceptional moisture resistance, and anti-condensation properties, making it the perfect choice for high-temperature and humid regions;
Employs state-of-the-art vacuum arc extinguishing technology for outstanding insulation reliability;
Delivers flawless opening and closing performance, ensuring safety with no risk of combustion or explosion;
Compact, lightweight, requiring no maintenance, and promises an impressive lifespan;
Versatility in operation-manual, electric, or remote control options available;
The operating mechanism is meticulously sealed at the base of the switch box, effectively safeguarding against outdoor environmental corrosion;
Showcases a novel, simplistic design with a restless mechanism that ensures reliable dynamic performance, compact form, and an astounding service life of up to 10,000 cycles.
Main technical parameters:
No | Name | Unit | Data | |||
1 | Rated voltage | kV | 12 | |||
2 | Rated current | A | 630 | 1250 | ||
3 | Rated frequency | Hz | 50 | |||
4 | Rated insulation level | 1min power frequency withstand voltage | Dry test | / | 42/48(fracture) | |
Wet test | 34 | |||||
Secondary circuit to ground | 2 | |||||
Lightning impulse withstand voltage (peak value) | 75/85(fracture) | |||||
5 | Rated short circuit making current (peak value) | kA | 50 | 63 | ||
6 | Rated short time withstand current | kA | 20 | 25 | ||
7 | Rated peak withstand current | kA | 50 | 63 | ||
8 | Breaking times of rated short circuit breaking current | Times | 30 | |||
9 | Rated short circuit duration | s | 4 | |||
10 | Rated operating voltage and rated voltage of auxiliary circuit | V | DC220,AC220 ,AC/DC220 | |||
11 | Rated operation sequence | / | Off-0.3s-on-off-180s-on-off | |||
12 | Rated current of over current trip | A | 5 | |||
13 | Mechanical life | second | 10000 | |||
14 | Allowable wear accumulative thickness of moving and static contacts | mm | 3 | |||
15 | Rated current of over current release | A | 5 | |||
16 | Current ratio of current transformer | / | 200/5 400/5 600/5 | |||
17 | Contact opening distance | mm | 9±1 | |||
18 | Contact overtravel | mm | 2±0.5 | |||
19 | Average opening speed | m/s | 1.2±0.3 | |||
20 | Average closing speed | m/s | 0.6±0.2 | |||
21 | Opening time | ms | ≤40 | |||
22 | Closing time | ms | 20~45 | |||
23 | Closing bounce time | ms | ≤2 | |||
24 | Asynchrony of three phase closing and opening | mm | ≤2 | |||
25 | Three phase circuit resistance | μΩ | ≤80 Band isolation≤120 | |||
