ZN63A (VS1) -12kV Indoor High Voltage Vacuum Circuit Breaker

Product Overview

The ZN63A (VS1) indoor high-voltage vacuum circuit breaker is a three-phase AC 50Hz indoor High-voltage Switchgear with a rated voltage of 7.2-12 kV. It serving as a protection and control unit for power grid equipment and power equipment in industrial and mining enterprises.

The circuit breaker complies with the national standards GB1984-89 "AC High Voltage Circuit breakers", JB3855-96 "3.6-40.5kV Indoor AC High Voltage Vacuum Circuit Breakers", DL403-91 "Technical Conditions for 10-35kV Indoor High voltage vacuum circuit breakers" and relevant international IEC standards, and has reliable interlocking function.

Applications and Installation

The ZN63A (VS1)-12 is designed for use in indoor power distribution systems with a rated voltage of 12kV . Its main function is to protect and control electrical equipment in places like power plants, industrial plants, and substations . It is particularly well-suited for applications that require frequent switching and environments aiming for oil-free and minimal maintenance solutions .

A key feature of this breaker is its installation flexibility. It can be configured as a fixed installation unit or combined with a dedicated advancing mechanism to be used as a withdrawable handcart unit . It is compatible with common switchgear models such as KYN28A-12 (GZS1) center-mounted cabinets and XGN series fixed cabinets .

Key Features and Advantages

- Advanced Vacuum Interrupter: The breaker uses a ceramic vacuum interrupter with copper-chromium contact materials and a longitudinal magnetic field contact structure. This design helps to diffuse the arc effectively, resulting in high breaking capacity and long electrical life .

- Enhanced Insulation Design: Many models feature an insulation barrel made using the APG (Automatic Pressure Gelation) process. With added internal skirts and reinforcing ribs, this design provides a higher insulation level and better resistance to dynamic stability currents. Placing the vacuum interrupter inside the barrel also protects it from damage and contamination .

- Integrated Design and Buffering: The device integrates the circuit breaker and operating mechanism into one unit, making it compact and reliable . A well-designed buffer system ensures no bounce during opening, reducing impact and vibration and contributing to its long mechanical life .

Main technical parameters

Mechanical characteristic parameters of circuit breaker

Appearance and installation dimensions of circuit breakers for handcart models

Normal condition

◆ Environmental temperature: not higher than 40 ℃, not lower than -10 ℃ (allowed for storage and transportation at -30 ℃).

◆ Altitude: not exceeding 1000m. (If an increase in altitude is required, the rated insulation level will be correspondingly increased.)

Relative humidity: daily average not exceeding 95%, daily average saturated vapor pressure MPa, monthly average not exceeding 1.8 × 10

Earthquake intensity: not exceeding level 8.

◆ Places without fire, explosion, serious pollution, chemical corrosion, and severe vibration.

Factory photos