ZW7-40.5 33kV High Voltage Outdoor Vacuum Circuit Breaker

General Introduction

ZW7-40.5 type outdoor high voltage vacuum circuit breaker is the three-phase AC 50Hz outdoor high voltage electrical equipment;

suit for control and protection of 20~40.5kV transmission and distribution system; can also be used for sectional circuit breaker and switching capacitor bank occasions;

this product can be matched with piecewise controller, reclose device can realize the power system intelligent segmentation, reclose control. And can add the current transformer for measurement and protection.

Circuit breaker equipped with spring or electromagnetic actuator, reliable mechanical performance, frequent operation; no fire and explosion danger;

circuit breaker conforms to the national standard GB1984-1989 “AC high voltage circuit breaker” and the International Electrotechnical Commission Standard IEC56, IEC62271-100 “high voltage AC circuit breaker” requirements.

The main characteristics of circuit breaker: excellent breaking performance, use vacuum arc, high breaking capability, mechanical life of up to 10000 times, has the advantages of simple structure, free maintenance, no maintenance cycle long;

good insulation performance, good anti contamination ability; can be installed current transformer according to customer requirements, the measurement accuracy up to 0.2 class, can realize the three-phase interactive protection.

Working Conditions

Ambient temperature: upper limit +40℃, lower limit -30℃

Days difference does not exceed 32K

Altitude: 1000m and the following areas

Wind pressure: not more than 700Pa (corresponding to the wind speed 34m/s)

Air pollution level: IV class

Earthquake intensity: do not exceed 8 degree

Ice thickness: no more than 10mm

Main Features of ZW7-40.5 Outdoor Vacuum Circuit Breaker

• Vacuum arc extinguishing technology
• High short-circuit breaking capacity
• Outdoor porcelain or silicone rubber insulation
• Reliable spring or electromagnetic operating mechanism
• Maintenance-free structure
• Long electrical and mechanical life
• Excellent anti-pollution performance
• Suitable for frequent operation
• Optional built-in current transformer
• Remote control and intelligent automation support

The circuit breaker is designed for harsh outdoor environments with reliable sealing, anti-aging capability, and strong insulation performance.

Technical Specification

Structural Features

Vacuum Interrupter Technology

The breaker adopts vacuum arc extinguishing chambers with strong interruption capability, stable insulation performance, and long service life.

Reliable Operating Mechanism

Available with spring operating mechanism or electromagnetic operating mechanism for stable and reliable operation under frequent switching conditions.

Excellent Outdoor Performance

The outdoor structure provides strong resistance to UV radiation, humidity, dust, pollution, and harsh climate conditions.

Flexible CT Configuration

Optional built-in or external current transformers can support metering, protection, and differential protection applications

Outline Drawing