S52S20A

S52S20A is a type of circuit breaker, which offers short-circuit current protection up to 20 kiloamperes. It is ideal for low-voltage distribution applications like residential and commercial lighting and motor control systems. It is composed of two devices, a trip solenoid and a thermal switch. The trip solenoid is a electromechanically operated switch actuated by an electromagnetic field, while the thermal switch is operated by thermal expansion. The application field of a S52S20A is mainly used in low-voltage distribution panels, such as those found in lighting and motor control circuits in residential and industrial facilities. It is suitable for applications such as single-phase distribution, motor control applications, panel boards, and switchgear applications.The working principle of S52S20A is based on the trip solenoid. When the circuit starts to flow current more than the rated range, the coil of the trip solenoid generates an electromagnetic field to momentarily open the bimetallic switch contacts, which cuts off the circuit. The operating time of this process is determined by the operating current, operating time range of the S52S20A, and the temperature of the bimetallic contacts. The thermal switch activates when the bimetallic contacts exceed a certain temperature. This causes the switch contact to open and the circuit breaker will automatically reset. Once the temperature of the circuit has cooled, the contacts will close and the circuit breaker will reset.The S52S20A offers both manual and automatic operations, with the manual option providing a reset button on the outside of the circuit breaker. This allows the user to reset the circuit breaker manually if there is a power overload or short circuit. The S52S20A also offers selectable short circuit current trip points that can be adjusted via a dial selector. This allows users to select the exact amount of current to trip so that the circuit breaker will not unintentionally trip. Overall, S52S20A is a reliable and safe circuit breaker that is used in many low voltage distribution applications. It is an ideal choice for both residential and industrial applications, offering protection via manual and automatic operation and adjustable short circuit current trip points.

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