UPL51-2651-2 Circuit Protection

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Circuit Breakers

UPL51-2651-2 application field and working principle

Circuit breakers are widely used in electrical systems for protection against short circuits, overloads, and ground faults. UPL51-2651-2 is a type of circuit breaker designed for applications in industrial electricity systems, with current ratings up to 100A. It offers rapid response to short-circuit conditions and is suitable for use in low-impedance circuits.

The UPL51-2651-2 circuit breaker has a two-piece design, with separate mechanisms for short-circuit and overload protection. The short-circuit protection mechanism is a pair of bimetallic trip coils in a housing, with a set of contacts that open when a short-circuit is detected. The overload protection mechanism is a thermal trip element which opens the contacts when a predetermined overload is detected. These mechanisms are connected electronically, so that when one opens the contacts, the other is also triggered.

The UPL51-2651-2 can be used with a variety of protection relays to add additional protection features such as current limiting, phase imbalance detection, and earth fault detection. It can also be used with electronic overload relays to monitor load current continuously. In this application, the circuit breaker can detect slight overloads before they reach the trip threshold, and the contacts can be closed in order to prevent a trip from occurring. The breaker can also be used in conjunction with a voltage regulator so that it can adjust its settings based on changes in the line voltage.

The UPL51-2651-2 circuit breaker is easy to install and operate, and offers reliable protection in many different types of industrial electrical systems. It can be used with a variety of accessories, such as protective relays and electronic overload relays, to provide further protection and monitoring capabilities. Its two-piece design makes it versatile and robust, and allows it to be used in a wide variety of applications.

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