IUGZX11-1-65-15.0-G-G3 Circuit Protection

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IUGZX11-1-65-15.0-G-G3 Application Field and Working Principle

Circuit breakers, as the name suggests, provide protection to electrical circuits. The IUGZX11-1-65-15.0-G-G3 is a medium-voltage circuit breaker designed to safely disconnect power when an electrical circuit experiences an overload or short circuit. It is designed for use in distribution systems up to 15.0kV and is rated for up to 65,000 amps.

Uses and Applications

The IUGZX11-1-65-15.0-G-G3 is specifically designed for medium-voltage residential, commercial and industrial applications. It can be used to protect underground, overhead, or pad-mounted distribution systems that have an available fault current of up to 65,000 amps. The application requirements for this circuit breaker include an adequate short-circuit current rating and fault interrupting rating for the connected loads.

The IUGZX11-1-65-15.0-G-G3 is particularly well suited for applications where a large interrupting capacity is necessary, such as for a transformer farm. However, since the breaker is designed for up to 15.0kV, it is not suited for higher voltage applications.

Working Principle

The IUGZX11-1-65-15.0-G-G3 circuit breaker uses a three-phase trip mechanism. This type of circuit breaker has three separate, external trip units that are each connected to a bushing. The bushing works with the trip mechanism to allow the circuit breaker to interrupt the current of an overload or short circuit.

When an overload or short circuit occurs, the current reaches a predetermined threshold and a relay is energized. This will cause the air-gap between the three external trip units to open, effectively breaking the circuit. Once the current is interrupted, the breaker will reset itself and is ready to be used again as soon as the fault is cleared.

Conclusion

The IUGZX11-1-65-15.0-G-G3 circuit breaker is a medium-voltage breaker specifically designed for residential, commercial, and industrial applications. It is able to interrupt up to 65,000 amps of fault current, making it suitable for use in transformer farms and other applications where a large fault interrupting rating is necessary. The breaker works by utilizing a three-phase trip mechanism which opens an air-gap to interrupt the current when a fault or overload is detected.

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