UPL12-20040-1 Circuit Protection

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Circuit breakers are electrical switches designed to prevent the high peak currents that come with short circuits and overloads. The UPL12-20040-1 is a 3-pole air circuit breaker designed to provide protection against overload, short circuit and ground fault protection.

UPL12-20040-1 Application Field

The UPL12-20040-1 three-pole air circuit breaker is suitable for use in industrial applications such as low-voltage and medium-voltage distribution systems with neutral points, star and ring networks, and 3-phase 3-wire or 3-phase 4-wire systems. Its primary application field is for the protection of electric machinery, lighting systems, household appliances, electronic equipment, motor loads, etc. It is also suitable for applications such as direct alternator start, secondary injection start, first check protection, and undervoltage protection.

UPL12-20040-1 Working Principle

The UPL12-20040-1 three - pole air circuit breaker has three main components: the operating mechanism, the arc-quenching chamber and the contact system. When the operating mechanism is activated, the circuit breaker makes contact with the conductor and creates a closed circuit. Upon an overload or short circuit, the electric current exceeds the rated current and the built-in electromagnetic contactor is triggered, pulling the tripping button out of its hollow cylinder. This, in turn, opens the contact system\'s contacts, which breaks the circuit with the conductor and prevents the current from overloading the wiring circuit. The arc-quenching chamber is a combination of the insulation medium and the contact system, which can effectively extinguish the electrical arc generated in the extinguished process.

The UPL12-20040-1 three-pole air circuit breaker is designed to automatically cut off the power supply when it senses an overload condition, thus protecting other electrical components from being damaged, as well as maintaining user safety. It is a cost-effective solution for protecting electrical motors, transformers, generators, and other electrical devices in low and medium voltage applications.

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