Neutral Earthing Resistors

Neutral Earthing Resistor(NER/NGR) is suitable for the operation mode of neutral point grounding through resistance, and is widely used in transformers or generators of 6-66KV AC power grids such as power plant power system, substation power supply system, industrial and mining enterprise power distribution system, etc. on the neutral point.

 

Operation Environment

• Installation location: Altitude≤1000M.

• The highest ambient air temperature does not exceed +40°C, and the lowest air temperature does not lower than -15°C.

• Environmental humidity: daily average relative humidity ≤ 95%, monthly average relative humidity ≤ 90%.

• The surrounding air should not be significantly polluted by corrosive or flammable gases, water vapor, etc.

• No serious pollution and frequent violent vibrations.

 

Related Standard

• DL/T780-2001

• DL/T620-1997

• GB/T16927

• GB1208-1997

• GB4208-93

• IEEE32-1972

 

Selection of Common models

 

	System voltage (KV)	NER Rated voltage (KV)	Rated short time fault current (A)	Time (S)	Resistance(Ω)
RSTNER6.0-100-10	6.0	3.46	100	10	34.6
RSTNER6.0-200-10	6.0	3.46	200	10	17.3
RSTNER6.0-400-10	6.0	3.46	400	10	8.6
RSTNER6.0-600-10	6.0	3.46	600	10	5.7
RSTNER6.3-100-10	6.3	3.64	100	10	36.4
RSTNER6.3-200-10	6.3	3.64	200	10	18.2
RSTNER6.3-400-10	6.3	3.64	400	10	9.1
RSTNER6.3-600-10	6.3	3.64	600	10	6.0
RSTNER10.5-200-10	10.5	6.0	200	10	30
RSTNER10.5-400-10	10.5	6.0	400	10	15
RSTNER10.5-600-10	10.5	6.0	600	10	10
RSTNER10.5-1000-10	10.5	6.0	1000	10	6
RSTNER22-400-10	22	12.7	400	10	31.7
RSTNER22-600-10	22	12.7	600	10	21.2
RSTNER22-1000-10	22	12.7	1000	10	12.7
RSTNER35-400-10	35	20	400	10	50
RSTNER35-600-10	35	20	600	10	33.3
RSTNER35-800-10	35	20	800	10	25
RSTNER35-1000-10	35	20	1000	10	20
RSTNER35-1250-10	35	20	1250	10	16
RSTNER35-1600-10	35	20	1600	10	12.5
RSTNER35-2000-10	35	20	2000	10	10
RSTNER66-1000-10	66	38	1000	10	38
RSTNER66-1250-10	66	38	1250	10	30.4
RSTNER66-1600-10	66	38	1600	10	23.7
RSTNER66-2000-10	66	38	2000	10	19