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The GSR plug is the newest device to perform this function. It becomes a mini circuit breaker for the circuit and is critical for high risk areas such as kitchens and bathrooms.

The basic circuit breaker is another device. It opens the circuit when the amperage exceeds the rating of the breaker. It is a device that can be reset.

The electrical fuse is the eldest of the devices. The disadvantage is that it must be replaced when the circuit is opened by overload.
Circuit breakers and their cheap alternative, fuses, are used to disconnect the power if an excessive current flows.

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8y ago
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13y ago

Insulation in good condition and keeping equipment enclosures on and tight are two things to prevent short circuits. Fuses and breakers do not prevent short circuits. They eliminate damage that could be caused by short circuits.

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14y ago

thermal& contactors

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13y ago

Both answers are correct

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13y ago

Breaker or fuse.

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Q: What are 2 protective devices used to open a circuit?
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Related questions

What devices are used to deliberately create an open circuit when the current exceeds a specific value?

fuses or circuit breakers


What are three protective devices used to protect typical power circuits?

Overload protection Short circuit protection Earth leakage protection


What are the switches in the circuit used for?

To open and close the circuit.


Used to open and close a circuit?

A light switch


What is the difference between relay and fuse?

A relay is a switch; it is not usually meant to open under fault conditions (high current), and would likely fail if done so. A fuse is a fault protection device. If a short circuit develops, large currents will flow, and the fuse link will melt, causing the circuit to open. There are also protective relays, which are devices that sense fault, or other undesireable conditions, and are used to send trip commands to breakers.


What is Short circuit maintenance current transformer in automatic voltage regulator?

the SCT is used to provide excitation during short circuit conditions. under Short Circuit the voltage may drop below threshold level causing field current to drop, to avoid over excitation by the AVR, the short circuit provides the excitation energy required to maintain a voltage that allows protective devices to operate and isolate the fault. the SCT is open under normal operating condition


What is circuit component?

Circuit components are the small devices used in electronic circuits to obtain the desired response.


How many series circuit paths are used to connect all of the devices?

There are 6 series paths that are used to connnect all of the devices.


What devices is used to absorb unwanted voltage fluctuations in a circuit?

diode


What device used to open a circuit if too much current flows through it?

A circuit breaker is a device used to open a circuit if too much current flows through it.


What is a device used to open and close an electric circuit?

The device is called a switch.


How are circuit breakers connected with the other elements in a circuit?

Both of these devices are safety devices used to open a faulted circuit and stop the current flow.