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What else can I help you with?
Which device provides short circuit protection?
A fuse protects a circuit from short circuiting. Also a breaker is used for this same purpose with the additional advantage of protecting the circuit from overloads also.
Did varistor having polarity how you will place the component and how you will check the component status?
Varistors are not polarity sensitive. Now I'm pretty sure that the device in question is a varistor. I googled for SAS-820KD05, found several references but unfortunately no data sheet - maybe you have more luck. One main criterium for selecting a varistor is the varistor voltage - as long as the voltage applied to the varistor is below the varistor voltage, it will behave like a capacitor. When the voltage is above, e.g. caused by a transient, it acts as a resistor, shorting this transient. Another important value is the max. pulse current a varistor can withstand.
What is varistor and what it do?
A varistor is a "variable resistor". When its value changes it then changes the amount of electricity it drops. Some of the energy goes to do the job; some of the energy is "dumped" out as heat. How about this: the volume control on your radio is a varistor. A dimmer switch on your living room lights is a varistor.
Where circuit breaker are used?
Circuit breakers do not use anything, they are a controlling device. They can automatically open the circuit if the current exceeds the current rating and you can manually disconnect the power from the circuit.
What device is used as a form of safety device in an electrical circuit?
A fuse or circuit breaker will fit this description.
A device with a overload protection used to control a motor is a?
A device with an overload protection used to control a motor is an Overload Relay.
Which device is often used to activate a circuit?
A switch is often used to activate a circuit.
What device is used for turning a circuit on or off?
Circuit breaker or switch
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.
Where is an mpcb used?
Motor protection circuit breakers(MPCB) are a specialized type of electrical protection device that is designed specifically for electric motors, like their name implies. Electric motors have plenty of applications and are used to drive mechanical devices of all types, so it is very important to protect them adequately with MPCBs.
Can a fuse be used to store and electrical charge?
No, a fuse is a safety device designed to protect an electrical circuit from excessive current by breaking the circuit when the current exceeds a certain level. It is not meant to store electrical charge.
What device opens and closes an electric circuit?
A switch is a device that is used to open and close an electrical circuit that is is connected into.
