Product introduction

• 72.5kV High - voltage Vacuum Circuit Breaker is a crucial electrical device. It uses vacuum as the arc - extinguishing and insulating medium, boasting high reliability and excellent performance.

• This breaker can quickly and effectively cut off load current and short - circuit current, protecting the power system. It features a high - current breaking capacity and a long electrical life.

• With a compact structure, it is suitable for both indoor and outdoor applications in 72.5kV power systems. It complies with relevant international and national standards, ensuring stable and safe operation in power distribution networks.

Main characteristic

• Excellent arc - extinguishing and insulation: Using vacuum as the arc - extinguishing and insulation medium, it has strong arc - extinguishing ability and stable and reliable insulation performance. It can effectively prevent arc reignition and other problems, ensuring the safe operation of the power system.

• Powerful breaking capacity: It can quickly and efficiently cut off load current and short - circuit current. It has high rated current and short - circuit breaking current parameters. For example, the rated current can reach 3150A, and the rated short - circuit breaking current can reach 40kA, which can meet the current breaking requirements of different working conditions in the power system.

• Long mechanical and electrical life: The mechanical life can reach 20,000 times, and the electrical life can reach 30 times. It is not easy to be damaged by frequent operations, reducing the frequency of equipment replacement and maintenance, and lowering the operation and maintenance costs.

• Good environmental adaptability: The operating ambient temperature range is - 40~55℃, enabling it to work stably in various climatic conditions. It can operate normally in areas with an altitude of no more than 5000m, is suitable for pollution class Ⅲ environments, has an aseismatic class of AG5, and a wind speed resistance of 34m/s, adapting to different geographical and environmental conditions.

• Reasonable structural design: It has a compact structure, occupies a small space, and is easy to install and arrange. There are multiple structural forms available (such as the common porcelain column type and handcart type), which is convenient for integration with different power systems and equipment.

• Compliance with standards and specifications: It is manufactured in strict accordance with relevant international and national standards, ensuring stable product quality and performance, and enabling reliable operation in the power system.

Main technical parameters

Instructions on placing orders 

• Model and format of the circuit breaker.

• Rated electrical parameters (voltage, current, breaking current, etc).

• Working conditions for using (environment temperature, altitude, and environment pollution level).

• Rated control circuit electrical parameters (Rated voltage of energy-store motor and Rated voltage of opening, closing coil).

• Names and quantities of spare items needed, parts and special equipment and tools (to be otherwise ordered).

• The wire connecting direction of the primary upper terminal.