Sontuoec Stro7le-63 Small Leakage Protection Circuit Breaker RCBO

Main functions of STRO7LE-63 RCBO

Overload Protection: When the current in the circuit exceeds the rated value of the STRO7LE-63 RCBO, it will automatically cut off the circuit within a set period of time to prevent the circuit and equipment from overheating, thus avoiding fire and damage.

Short circuit protection: When a short circuit occurs in a circuit, the STRO7LE-63 RCBO will quickly cut off the circuit to prevent the short circuit current from causing serious damage to the circuit and equipment.

Leakage Protection: The STRO7LE-63 RCBO is capable of detecting residual current (i.e., leakage current) in a circuit. When the residual current exceeds the set threshold, the STRO7LE-63 RCBO will cut off the circuit in a very short period of time to prevent electrocution accidents and electrical fires.

Principle of operation of the STRO7LE-63 RCBO

The STRO7-40 RCBO contains an internal thermal magnetic trip detector (for overload and short circuit protection) and a residual current detector (for leakage protection). When the current or residual current in the circuit is abnormal, the corresponding striker triggers the tripping mechanism of the STRO7-40 RCBO, making it quickly cut off the circuit.

1.Thermal Magnetic Tripper: It utilizes the heat and magnetic field generated when the current passes through the conductor to trigger the tripping. When the current is too high, the conductor heats up and generates a magnetic field, causing the bimetal inside the thermal magnetic striker to bend or the magnet to attract the iron core, thus triggering the tripping mechanism.

2.Residual current detector: It utilizes a zero sequence current transformer to detect the residual current in the circuit. When the residual current exceeds the set threshold, the residual current detector will send a signal to the tripping mechanism to cut off the circuit.