Product Overview
The ZW32-12(G)/630A series outdoor high-voltage vacuum circuit breaker (hereinafter referred to as "the breaker") is outdoor distribution switchgear with a rated voltage of 12 kV, three-phase AC 50 Hz.The ZW32-12(G)/630A series outdoor high-voltage vacuum circuit breaker is mainly used for breaking and making load current, overload current and short-circuit current in power lines; it has overload and short-circuit protection functions, meets control and measurement requirements, and also provides remote control and monitoring functions. It is widely used for control and operation in substation and industrial & mining distribution systems, especially suitable for places requiring frequent operation.The ZW32-12(G)/630A series outdoor high-voltage vacuum circuit breaker complies with technical standards such as GB1984-2003, DL/T402-2007 and IEC60056.
Type Designation
Normal Service Conditions
The overall structure is a three-phase post-type dry structure;
Fully enclosed structure with good sealing performance, good moisture-proof and anti-condensation properties, suitable for use in hot and humid areas;
Vacuum arc extinction with reliable insulation; breaking and making performance is reliable, with no risk of fire or explosion:
Closing/opening operations can be manual, motorized or remote; the operating mechanism is sealed at the bottom of the switch tank, effectively preventing rust caused by long-term outdoor exposure: ◇ The operating mechanism is novel in design, simple in structure, reliable in action and small in size, with a mechanism life of up to 10000 operations.
Outline & Installation Dimensions
Technical Parameters (see table)
| No. | Item | Unit | Value | ||
|---|---|---|---|---|---|
| 1 | Rated voltage | kV | 12 | ||
| 2 | Rated current | A | 630 | 1250 | |
| 3 | Rated frequency | Hz | 50 | ||
| 4 | Rated insulation level | Dry test | 42/48 (break) | ||
| 1-min power-frequency withstand voltage, wet test | 34 | ||||
| Secondary circuit to earth | 2 | ||||
| Lightning impulse withstand voltage (peak) | 75/85 (break) | ||||
| 5 | Rated short-circuit breaking current | kA | 20 | 25 | |
| 6 | Rated short-circuit making current (peak) | kA | 50 | 63 | |
| 7 | Rated short-time withstand current | kA | 20 | 25 | |
| 8 | Rated peak withstand current | kA | 50 | 63 | |
| 9 | Number of rated short-circuit breaking operations | operations | 30 | ||
| 10 | Rated duration of short circuit | s | 4 | ||
| 11 | Rated operating voltage & rated auxiliary-circuit voltage | DC220、AC220、AC/DC220 | |||
| 12 | Rated operating sequence | O-0.3s-CO-180s-CO | |||
| 13 | Rated current of over-current release | A | 5 | ||
| 14 | Mechanical endurance | operations | 10000 | ||
| 15 | Cumulative allowable wear thickness of moving/fixed contacts | mm | 3 | ||
| 16 | Rated current of over-current release | A | 5 | ||
| 17 | Current transformer ratio | 200/5400/5600/5 | |||
| 18 | Contact gap | mm | 9±1 | ||
| 19 | Contact overtravel | mm | 2±0.5 | ||
| 20 | Average opening speed | m/s | 1.2±0.3 | ||
| 21 | Average closing speed | m/s | 0.6±0.2 | ||
| 22 | Opening time | ms | 20~40 | ||
| 23 | Closing time | ms | 30~60 | ||
| 24 | Closing bounce time | ms | ≤2 | ||
| 25 | Three-pole closing/opening non-simultaneity | ms | ≤2 | ||
| 26 | Phase-to-phase circuit DC resistance | μΩ | ≤80 (≤150 with isolating breaker) |
Related Products
Outdoor high-voltage circuit breakers of the same series and other types available:
- ZW32-12(G) Outdoor High-voltage Vacuum Circuit Breaker for Pole-mounted Distribution
- ZW32M(T)-12 Integrated Outdoor Vacuum Circuit Breaker
- ZW32ABG-12 Permanent-magnet Outdoor Vacuum Circuit Breaker
- ZW32-12FG/630A Outdoor Sectionalizing Vacuum Circuit Breaker (Intelligent Sectionalizing Switch)
- ZW8-12/630A Outdoor High-voltage Vacuum Circuit Breaker
- ZW20A-12/630A Outdoor High-voltage Vacuum Circuit Breaker
