Miniature Circuit Breaker

STB1L-125 Residual Current Circuit Breaker

The STB1L-125 residual current circuit breaker is suitable for AC 50Hz or 60Hz, rated voltage single-pole two-wire, two-pole 230V, three-pole, three-pole four-wire, four-pole 400V circuits, with rated current ranging from 63A to 100A. It can protect circuits and motors against overload or short-circuit, and can also be used for infrequent switching of circuits and infrequent starting of motors.

STB1L-63 Residual Current Circuit Breaker

◆ Suitable for personnel and fire protection, overload and short-circuit protection for circuits.
◆ Rated breaking current: 30mA for direct contact protection, 300mA for ground fault current protection.

STB1-63 Miniature Circuit Breaker

◆ Suitable for overload and short-circuit protection of circuits and equipment.
◆ Technical parameters to consider when selecting a miniature circuit breaker: grounding system (TN-S, TN-C), short-circuit current at installation must be less than the device's breaking capacity, and nominal voltage.

ST18G-125 Photovoltaic Overvoltage and Undervoltage Protection Circuit Breaker

◆ ST18G-125 Photovoltaic Overvoltage and Undervoltage Protection Circuit Breaker (32A, 40A, 50A, 63A, 80A, 100A, 125A)
◆ Anti-islanding automatic recloser with overvoltage/undervoltage auto-reclosing function: automatically closes when power is present, and automatically opens when power is interrupted.
Includes fault prevention of closing, overload, and short-circuit protection. Suitable for AC 50Hz circuits with rated operating voltages of AC 230V (1P+N, 2P) and AC 400V (3P+N, 4P), and rated currents of 6A–125A, for automatic on/off control of the circuit.
◆ Automatic mode: The circuit breaker automatically closes when the main circuit is energized and automatically opens when the power is interrupted.
◆ Manual mode: When the main circuit is energized, the circuit breaker automatically adjusts to the open state and does not close automatically, ensuring safety for circuit maintenance and inspection.

ST18D-125 Intelligent Recloser Miniature Circuit Breaker

◆ ST18D-125 Intelligent Recloser Miniature Circuit Breaker
◆ Suitable for AC 50Hz circuits with rated operating voltage up to 400V and rated current up to 125A. It can perform remote automatic on/off control of the current in the circuit, and features overload and short-circuit protection functions. It can also be used for infrequent operation switching of the circuit.
◆ Widely applied as an external circuit breaker for IC card prepayment electricity meters.