ZN85A40.5/T1600-31.5 (3AV7) type indoor AC high voltage vacuum circuit breaker is composed of XIHARI project, new breaker jointly developed by the company to participate in the.

The circuit breaker is applicable to three-phase AC 50Hz, 40.5KV system, can be used for industrial and mining enterprises, power plant and substation as points and load current, overload current, fault current in. And is suitable for frequent operation occasions.

The circuit breaker comply with GB1984 "AC high voltage circuit breakers," JB/T3855 "3.6-40.5kV> indoor AC high voltage vacuum circuit breaker" standard requirements, and meet the relevant requirements of IEC60056 Fifth Edition "high-voltage AC circuit breaker".

The environmental conditions of use of the product

A, the ambient temperature does not exceed 40 degrees, not lower than -15 DEG C; the daily average temperature does not exceed 35 degrees;

The average value of B, the relative temperature does not exceed 95%; average daily water vapor pressure is less than 2.2kPa; monthly average relative humidity is less than 90%; month water vapor pressure mean value does not exceed 1.8kPa;

C, altitude not exceeding 1000m;

D, the surrounding air not significantly affected by smoke, dust, corrosive or flammable gas, steam or mist of salt pollution;

E, from the switch equipment and control equipment of external vibration or earthquake can be ignored;

Amplitude of electromagnetic interference in F, two in the induction system does not exceed 1.6kV.

1, structure

ZN85A40.5/T1600-31.5 (3AV7) type indoor AC high-voltage vacuum circuit breaker with upper and lower structure layout, effectively reducing the depth of the circuit breaker.

The circuit breaker uses the composite insulation structure, meet under normal operating conditions the air distance and the creepage distance requirements, effectively laughed breaker volume. The main circuit of vacuum interrupter and static conductive connection installed in the insulating cylinder, spaced 300 mm. The connection of the main circuit electric all adopt the fixed connection, has the very high reliability.

Actuator using specifically for this new circuit breaker design of spring operating mechanism, installed on the breaker frame. The structure characteristics are more suitable for the circuit breaker on the arrangement form, and become a part of the overall structure of breaker integral.

Large shaft crank arm push insulator at the same time, both sides of the other end of the arm stretching phase turn opening spring, which finishes the energy storage; the crank arm pressing circuit breaker points signs of mesophase, the indicator switch state. Circuit breaker closing operation,

2, circuit breaker action principle

Circuit breaker is closing has storage or closing without energy storage state, when receiving the tripping instruction, mechanism of lifting the closing state, the rapid gate. In the opening force, open the breaker, arc quenching chamber off the current open. The crank arm, a transmission shaft, insulator, large opening spring, closing signs are restored to the off position. Tripping operation finished circuit breaker.

3 working principle, circuit breaker handcart

This type of circuit breaker can be installed in a handcart, the handcart frame is provided with a screw nut pushing mechanism. Can easily operate, make the truck in the disconnect / move between the test position and a working position, with the help of sales of screw nuts can make the handcart reliably pin fixed on the working position, prevent the handcart movement caused the accident was caused by the effect of electric power.