Product Overview:
The ZN63A (VS1-12) series indoor high voltage vacuum circuit breaker is designed for use in 12kV, three-phase, 50Hz electrical systems. Developed by integrating advanced technology from Switzerland’s ABB company with national research and development capabilities, this circuit breaker provides reliable and safe interruption of electrical currents. It is ideal for various industrial, commercial, and utility applications.
Structural Features:
Installation Method:
Applicable Environmental Conditions:
| Item | Unit | Parameter | |||
|---|---|---|---|---|---|
| Rated voltage | kV | 12 | |||
| Rated frequency | Hz | 50 | |||
| Rated current | A | 630-1250 | 1250-1600 | ||
| Rated short-circuit breaking current | kA | 20 | 25 | 31.5 | |
| Rated short-circuit making current | kA | 50 | 63 | 80 | |
| Rated peak withstand current | kA | 50 | 63 | 80 | |
| 4s rated short-circuit withstand current | kA | 20 | 25 | 31.5 | |
| Rated insulation level | Power frequency withstand voltage (before and after rated breaking) | kV | 42(phase to phase，to earth)/48(fracture)effective value
75(phase to phase，to earth)/85(fracture)peak |
||
| Lightning impulse withstand voltage (before and after rated breaking) | |||||
| Rated operating sequence | time | On-0.3s-off on-180s-off on | |||
| Mechanical life | time | 20000 | |||
| Rated short-circuit current breaking times | V | 50 | |||
| Rated closing voltage of operating mechanism (DC) | V | AC/DC 110、220 | |||
| Rated opening voltage of operating mechanism (DC) | mm | AC/DC 110、220 | |||
| Clearance between open contacts | mm | 9±1 | |||
| Overtravel (contact spring compression length) | ms | 3.5±0.5 | |||
| Three-phase split, closing bounce time | ms | ≤2 | |||
| Contact closing bounce time | m/s | ≤2 | |||
ZN63(VS1-12C)-12C indoor AC vacuum circuit breaker is suitable for rated voltage zone 12 kV, frequency 50Hz three-phase power system, as a protection and control appliances, due to the special advantages of the vacuum circuit breaker, especially suitable for rated current frequency operation, or multiple open current places.
ZN63(VS1)-12C indoor AC vacuum circuit breaker adopts fixed installation, mainly used for fixed switchgear, the circuit breaker can be used alone, but also can be used for ring network power supply, box transformer or various non-standard power supply systems.
The product has the advantages of compact and novel structure, reliable insulation, no pollution, no explosion risk, stable performance, high technical parameters, long maintenance cycle, complete operation functions and so on. The main part of the circuit breaker is arranged in the insulation cylinder made of epoxy resin cast by APG process. This structure can effectively prevent the influence of external factors including external force impact and dirty environment on the vacuum arc extinguishing chamber. And the main insulation cylinder with internal and external skirt, creepage ratio exceeds the national standard requirements, has a very high insulation performance, adapt to various harsh environments. The circuit breaker adopts the integrated design of the operating mechanism and the circuit breaker body, the front and back arrangement, the operating mechanism is specially optimized design, the transmission efficiency is high, the mechanical characteristics are stable, and the life span is more than 20,000 times. The circuit breaker can be used as a fixed installation unit, or a special propulsion mechanism to form a handcart unit, and can be flexibly matched with various domestic complete sets of equipment. It has become the absolute mainstream product of 12kV vacuum circuit breaker in China.
It is equipped with a dedicated driving mechanism, allowing it to be used as a trolley unit for easy operation within switchgear.
It includes a reliable interlocking unit to provide “five-prevention” protection functions, enhancing safety during operation.
