neutral grounding resistor for transformer or generator

neutral grounding resistor cabinet (NGR or NER) are employed in medium-voltage AC distribution networks to limit the current that would flow through the neutral point of a transformer in the event of an earth fault. It connected between the neutral point of the transformer and the earth. Its function is to limit the single phase ground fault current to a specified value so that protecting the transformer and generator.

Specifications:

a. Ambient temperature: -40u00b0C~70u00b0C

b. Altitude: less than 4000m

c. Relative humidity: less than 95% (25u00b0C)

d. Codes and standards: IEEE-32 , DL/T 780-2001,IEC60185;BS115

e. Rated frequency: 50/60HZ

f. Location: outdoor/indoor

g. Enclosure: aluminum-zinc plates, stainless steel plates or cold-rolled steel plate

h. according to your requirements.

j. Resistor material: stainless steel, Nickel-chromium alloys; electrothermal alloy

k. Degree of protection: for in door: IP32,IP41;Outdoor IP54,IP55; or design as required

l. Package: Fumigation-free woodiness packaging

m. with a lower coefficient of resistivity

n. Type test report

manufactures various resistors according to the customer's requirement, the design inaccuracy is u00b13%, the flow time is various from 10s, 15s,30s, 60s,2h.