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Induction Motor Interview Questions with Answers | Part-1

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How Fuse is work??!!

How Fuse is work??!!


Fuse

What is Fuse??

  • Fuse is a one type of protective device which is used for protecting electrical equipments against short circuit and overloads.

Construction of Fuse 

  • A Fuse is directly connected with equipments to be protected in series, circuit diagram of fuse working is shown in below image.
Circuit diagram of fuse

Working of Fuse


  • In normal working condition fuse carries the load current without overheating.

  • Also, when faulty condition or abnormal condition occurs yhen the excessive current flow through the fuse.

  • When any fault occurs then temperature will be increasing and heat will be produced due to losses or fault.

  • So, At that time the fuse element or fuse wire will be melts due to high temperature and then it will be open the circuit.

  • So, Fuse protects the machines and electrical equipments from damage which will be occured by the high or excessive current.

Note:


  • Fuse always should be connected with the fase wire so under faulty condition. When fuse element melts then phase will not reach at the load.

  • If we connected it with the neutral wire, then the fase current will reach at the load even though fuse melts.

Material used in fuse wire


  • The fuse element or wire material must be low melting point, low cost and low ohmic loss.

  • Tin, lead , zinc, copper, aluminium, silver are the materials used as a fuse element.

Advantages of Electrical Fuse


  • No maintenance requires.
  • So maintenance cost is not required.
  • Pollution free operation occurs.
  • It breaks the electrical circuit without smoke and noise.

Disadvantages of Electrical Fuse


  • Fuse has to need to be replaced after each operation.

Application of Electrical Fuse


  • The most Important application of fuse are given below
  1. To protect the motor
  2. To protect the cables
  3. To protect the semiconductor devices
  4. Home appliances like a freezer, T.V. , etc...



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