LMLHPB111-1RLS4-36370-151 Circuit Protection

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The LMLHPB111-1RLS4-36370-151 circuit breaker is a single-pole miniature circuit breaker (MCB) that is part of a family of MCBs manufactured by leading brands in the electrical industry. It is typically used in applications where short-circuit and overload protection is critical for safety and to protect equipment. It is particularly suitable for use in industrial, commercial and residential applications.

Application Field

The LMLHPB111-1RLS4-36370-151 circuit breaker is designed to provide short-circuit and overload protection of circuits operating at up to 277 volts AC. It can be used in a range of applications including branch circuits, motor circuits, lighting fixtures, pool & spa equipment, home appliance circuits, and battery charging systems. It is an ideal choice for protecting circuits with a relatively low current rating, such as for LED lighting, small motors, and appliances.

Working Principle

The LMLHPB111-1RLS4-36370-151 has a thermal-magnetic trip unit that senses both current and temperature. The trip unit consists of a thermally activated bi-metal element and a magnetic circuit breaker. The thermally activated bi-metal element is designed to react to steady state current conditions. The magnetic circuit breaker is designed to react to high inrush currents, both of which can occur during electrical faults or equipment failures such as short circuits, motor stalls, motor overloads, and ground faults.

When steady state current or high inrush current is detected, the bi-metal element warms up, thus causing it to deform. This deformation is transferred to the magnet, which activates the circuit breaker. The circuit breaker then trips, and the contacts inside open up to prevent further electricity flow, thus interrupting the circuit or preventing further electricity flow.

The LMLHPB111-1RLS4-36370-151 can be manually tripped, either by pushing the upper part of the breaker up to the off position or by rotating the red manual trip button on the bottom part of the breaker. This provides users with an easy way to manually disconnect a circuit in cases of emergency or service.

Conclusion

The LMLHPB111-1RLS4-36370-151 circuit breaker is an excellent choice for providing short-circuit and overload protection in applications with relatively low current ratings. It has a thermal-magnetic trip unit that can sense both current and temperature, and it can be manually tripped for emergency disconnection or service. It is a reliable and cost-effective choice for circuit protection in industrial, commercial, and residential electrical systems.

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