Miniature Circuit Breaker

CNKA 30 amp double pole ac circuit breaker Introduction

China suppliers CNKA's discounted 30-amp double-pole AC circuit breaker is an electrical safety device designed to protect circuits from overcurrent damage, including overloads and short circuits. Its primary functions are to manually open and close (connect and disconnect) the circuit and automatically cut off the circuit in the event of a fault, thereby safeguarding equipment and preventing fire hazards. These 30-amp double-pole AC circuit breakers are widely used in both industrial settings and everyday applications.

CNKA 30 amp double pole ac circuit breaker Parameter (Specification)

CNKA 30 amp double pole ac circuit breaker Composition

A typical small circuit breaker employs mechanical methods to separate its moving and fixed contacts when opening the circuit. Conversely, when closing the circuit, it uses opposing mechanical actions to bring the moving and fixed contacts together. During operation, an arc forms between the contacts as the load circuit is interrupted or connected. The arc generated during the breaking process is more intense than during the closing process. When the current to be interrupted is high, particularly in the case of a short circuit, the arc can be substantial, making it challenging to disconnect the circuit.

CNKA 30 amp double pole ac circuit breaker Details

CNKA 30 amp double pole ac circuit breaker Dimensions and wiring

CNKA 30 amp double pole ac circuit breaker Select

1  TN-S and TN-C-S systems typically do not require four-pole circuit breakers. However, in certain cases within a TN-S system, such as severe three-phase imbalance or high zero-sequence harmonic content, further investigation may be needed to determine if a four-pole circuit breaker is necessary.

2  For TT systems, the power input circuit breaker should be a four-pole circuit breaker.

3  In IT systems, a four-pole circuit breaker should be used if there is a neutral lead present.