aarthivg
aarthivg
Branch Unspecified
14 May 2012

why the present day surge diverters use non-linear resistance elements

why the present day surge diverters use non-linear resistance elements?
Anuj Aggarwal

Anuj Aggarwal

Branch Unspecified
14 May 2012
Non linear resistor has the property to block the current upto a certain level to which it is set i.e. it will block the current from passing through upto a preset value and allows the current to pass through it when current exceeds( as in case of lightning surge ) , thus grounding the lightning surge and hence prevents that large current from reaching the equipment which is to be protected.
westom

westom

Branch Unspecified
15 May 2012
Best protection for cable TV is a wire from that cable to earth ground. Other incoming utilities (ie telephone, AC electric) cannot make that same low impedance connection. So a protector makes that connection. Non-linear means each wire remains unconnected in normal operation. And connected low impedance to earth during a transient. Cable has better protection. But non-linear resistors are required so that telephone and AC electric service is not shorted out by the earth ground connection.

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