No handwriting What happens when a voltage greater than the rated voltage is applied to an...
No handwriting
What happens when a voltage greater than the rated voltage is applied to an electrical appliance?
Homework Answers
An electrical appliance has insulation which plays an important role in the protection of appliance and also ensures safety to the users. The insulation depends on the voltage rating of the appliance.
When a voltage greater than the rated voltage is applied to appliance the insulation gets damaged and due to this the winding gets short circuited which causes heavy current flow through the machine. This damages the windings permanently. This also causes the copper loss to increase as powerloss is equal to (I²R).
However appliances insulation is designed to withstand for slightly more voltage than rated value upto 5 percent to protect insulation from slight voltage surges.
So rated voltage must be applied to the appliance for proper efficient working of it
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