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That is called a fuse.

A fuse is a protective device, which will interrupt the flow of electricity if it is subjected to a current that is greater than its rating.

Some fuses are designed to handle a large inrush of current and are used in circuits such as air conditioners, where a large amount of current is needed at startup, for a short duration and then current drops to a lower level.

These are sometimes called time-lag fuses.

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Q: What is an over-current protective device?
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What is a overcurrent device?

a device protecting conductors or other equipment in a circuit from an overload/overcurrent situation


Why is fuse rated for amperes?

E a suportação da corrente elétrica, por exemplo: 1 am = 1000ma.AnswerBecause it is an overcurrent protective device -overcurrents are rated in amperes.


What is an overcurrent device?

breakers and fuses


Ring final circuits in domestic properties usually require a protective device which is rated at?

According to BS7671:2008, Requirements for Electrical Installations, an overcurrent protection device rated at either 30 A or 32 A is required.


How are branch circuits rated?

By the rating of the overcurrent device.


What circuit protection device can be reset after it opens?

A circuit breaker is an overcurrent device that can be reset after it has opened.


What does OPD mean in electric terms?

'Overcurrent protection devices' are used to protect conductors from excessive current flow... a fuse


Can you use a 60 amp breaker with a 50 amp overcurrent device?

A 50 amp breaker is an overcurent device.


Differetiate between solid earthing and ELCB?

ELCB is the connection to the direct earth path using protective device.while solid earthing is without protective device.A form of ELCB should be installed when direct earth path of low enough impendance can not be obtained.


What is the Simplest protective device for an electric current?

A fuse is the simplest protective device for over current in an electric circuit.


How does Inverse time overcurrent works?

It monitors the general balanced overloading and has current/time settings. This is determined by the overall protective discrimination scheme.


What do relay and circuit breakers use?

No. A relay is an electric switch and a circuit breaker is an overcurrent device.