Circuit breaker

Product introduction

Circuit breaker refers to the switching device that can close, carry and break the current under normal circuit conditions and can close, carry and break the current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high voltage circuit breakers and low voltage circuit breakers according to their scope of use. The high and low voltage boundaries are relatively vague, and those above 3kV are generally referred to as high-voltage electrical appliances.

Product performance and parameters

Project

Rated voltage (kV)

25.8

Rated current (A)

630A    1250A

Rated frequency (Hz)

60

Rated short-circuit breaking current (kA)

25

Rated short-circuit making current (kA)

65

Rated short-time withstand current (kA)

25

Rated power frequency withstand voltage (kA) (rms)

60

Rated lightning impulse withstand voltage (kV) (Peak)

125（1.2×50㎲）

No load closing time (s)

≤ 0.1 S

Opening time (seconds)/Opening time

≤ 0.1 S

Rated short-circuit breaking time

3

Applicable standards

IEC 62271-100

Trip control mode

shunt

Auxiliary contact

Level 1