Punched SS Earthing Resistor Product Specifications
Resistor
For Industrial Use
380-440 Volt (V)
50-300 Kilograms (kg)
Yes
50 Hertz (HZ)
Grey & Silver
Punched SS Earthing Resistor Trade Information
50 Unit Per Month
1-5 Week
All India
Product Description
Neutral Grounding Resistor(NGR):
NGR is employed in AC distribution networks to limit the fault current which would flow from the transformer or generator neutral star point in the event of an earth fault in the systems. It is used when the neutral of supply transformer is accessible and its own impedance is not enough to limit fault current. The rating of the protection relays within the required time.
For Grounding Neutral of Transformer or Generator, Resistors upto 33 KV are offered for fault of short duration like 10 sec., 30 sec., 60 sec., continuous etc. Material of resistor is normally Stainless Steel, FeCrAl, Cast Iron, Copper Nickel or Nichrome.
Temperature rise is normally 375oC/760oC or as required by customer.
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