3 Pole Molded Case Circuit Breaker, 50A/ 60A/ 75A/ 100A

Mccb circuit breaker with IP20 protection degree, rated voltage 380/ 415VAC, 50Hz/ 60Hz. 100 amp mccb has advantages of high reliability, low failure rate, long overhaul period and low maintenance workload.

Molded Case Circuit Breaker Information

• Model: ATO-ABE-103b
• Rated Current: 100 amp
• Rated Voltage: 380/415V AC, 50Hz/ 60Hz
• Number of poles: Three pole
• 50 kA short circuit interrupting capacity

Specification

Dimension (Unit: mm)

Details

Tips: Working Principle of Molded Case Circuit Breaker.

The main contact of the low-voltage circuit breaker is manually operated or electrically closed. After the main contact is closed, the free trip mechanism locks the main contact in the closing position. The coil of the overcurrent release and the thermal element of the thermal release are connected in series with the main circuit, and the coil of the undervoltage release is connected in parallel with the power supply.

When the circuit is short-circuited or severely overloaded, the armature of the overcurrent release pulls in, causing the free tripping mechanism to operate, and the main contact disconnects the main circuit.

When the circuit is overloaded, the thermal element of the thermal trip unit generates heat to bend the bimetallic strip, pushing the free trip mechanism to act, and the main contact disconnects the main circuit.

When the circuit is under-voltage, the armature of the under-voltage release is released, which also causes the free trip mechanism to act, and the main contact disconnects the main circuit.

When the shunt trip button is pressed, the armature of the shunt trip unit pulls in, causing the free trip mechanism to act, and the main contact disconnects the main circuit.