Z**8-12/1250A Indoor High-Voltage Vacuum Circuit Breaker

Principle

The ZN12-12/1250-31.5 indoor high-voltage vacuum circuit breaker is suitable for 12KV-35KV three-phase AC 50Hz power systems. This circuit breaker features a porcelain arc chamber and employs longitudinal magnetic contacts, offering a compact design. The arc current distribution is consistent on the contacts during interruption, preventing localized melting. It also boasts low arc energy voltage (20-200V) and low current chopping value (4-15A), along with a highly reliable operating mechanism. The circuit breaker utilizes the DYT-1 type spring-energy storage mechanism, which can be operated with AC energy storage or DC operation, as well as manual operation. It employs a special contact material, enhancing the arc chamber's breaking capacity and ensuring an extended electrical life.

Key Technical Parameters

Dimensions and installation size

Environmental Requirements

The main circuit utilizes composite insulation, offering a compact design that saves space while effectively protecting the vacuum interrupter from impact and collision.

2. Vacuum Interrupter Chambers are sourced from domestic manufacturers, with the option to install imported vacuum interrupters upon customer request.

3. Compatible with KYN28A-24 central cabinet.

4. Rated current: 630-3150A, rated short-circuit breaking current: 20kA-31.5kA; full range of certification for product model and model usage.

5. Mechanical lifespan: 20,000 cycles.

6. No re-ignition observed during capacitor switching capacitor test.

7. Suits voltage requirements of 12KV in highland areas at an altitude of 4,500 meters.

Other models include: ZN12-12/1600-31.5, ZN12-12/2000-31.5, ZN12-12/630-20

Product Advantages

This circuit breaker features a simple structure, strong breaking capacity, long service life, complete operating functions without danger, and easy maintenance. It is suitable for control or protection switches in distribution systems of power plants and substation, particularly for locations where important loads are frequently switched.