protective devices

CIRCUIT BREAKER

What is a Circuit Breaker?

What is a Circuit Breaker? A circuit breaker is a device that may manually or automatically break a circuit under all circumstances, including no load, full load, and short circuit.       A circuit breaker is a device that can perform any of the following functions: Under typical circumstances, manually or by remote control, makes or breaks …

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What is Auxiliary Contact and how it works with MCB?

A miniature circuit breaker can provide much more than current protection, it can also provide remote tripping, status indicator, under-voltage/overvoltage protection, and other features. What is Auxiliary contact? Auxiliary contacts (or switches) are supplementary contacts that are added to a circuit to protect the main contact. This accessory allows you to check the status of a …

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TRIP CURVE OF MCB

What are the Characteristics of trip Curves of the MCB?

Trip Curve of MCB: The Trip Curve is a graphical representation of the circuit protection devices. Fuse, MCB’s, MCCB’s, supplementary protectors, motor protection circuit breakers, overload relays, electronic fuses, and air circuit breakers are all examples of circuit protection devices. The multiples of the current going through the miniature circuit breaker are represented on the horizontal X-axis. …

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Accessories and Protective Devices for transformers

Introduction  In this session we are gonna discuss about some protective devices and accessories ie used in transformers 1.Double-float Buchholz relay  For sudden pressure rise and gas detection in oil-immersed transformer tanks with conservator. Installed in the connecting pipe between tank and conservator and responding to internal arcing faults and slow decomposition of insulating materials. …

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