Transformer Neutral Grounding Resistors,China

Sell NGR:Neutral Grounding resistors 1.Material:stainless steel and CRS 2.Standard:IEEE32-1997 3.ISO9001

1.Neutral Grounding Resistors Operating Environment

Use condition:	Outdoor, and 50Hz and 60 Hz
Altitude high:	Less than 3500m
Ambient temperature:	-20 centigrade ~~+70 centigrade
Earthquake grade:	Less than 8 grade
Icing thickness:	Less than 10 m
Air grade:	Not more than IV grade
Wind grade:	Not more than 700Mpa
Relative humidity:	Not more than 95%

2.Model Number Explanation   

3.Parameters of Grounding Transformer

Type	System voltage  (kV)	Rated current (A)	Short time(S)	Rated voltageΩ (±5%)	Insulation resistance voltage  Kv
					8/20μS Lightning surf	1min Frequency
MRD-BJ-6/36.4	6.3	100	10	36.4	60	32
MRD-BJ-6/18.2	6.3	200	10	18.2	60	32
MRD-BJ-6/9.09	6.3	400	10	9.09	60	32
MRD-BJ-6/6.06	6.3	600	10	6.06	60	32
MRD-BJ-10/15.16	10.5	400	10	15.16	75	42
MRD-BJ-10/10.10	10.5	600	10	10.10	75	42
MRD-BJ-10/7.57	10.5	800	10	7.57	75	42
MRD-BJ-10/6.06	10.5	1000	10	6.06	75	42
MRD-BJ-35/20.20	35	1000	10	20.20	185	95
MRD-BJ-35/10.10	35	2000	10	10.10	185	95

4.  Transformer Neutral Grounding Resistors (MRD-BJ-NGR7) Product Features 

1.Adopted high quality imported stainless steel or domestic stainless steel electric heating metal material, the product

 operates safely and reliably with the advantages of high conductivity, high temperature coefficient, corrosion resistance, thermostability, good oxidation resistance, high tensile strength, resistance value stability and etc.2.The device also could be applied in medium power distribution system. When transformer is angleconnected, independent grounding transformer could be installed with which the neutral point and resistance are connected.

2. Resistance value could be designed from 1ohm to 2000ohm and current from 1A to 2000A

3. The cabinet coould be installed indoor or outdoor. As the cabinet body is corrosion-resistent and of high protection grade, made from stainless steel plate or painted cold rolled steel plate. 

4.The counting funciton could be added to the device, which records times of resistance grounding.

5. Isolated switch could be added which convenients examination and repairment and so does temp. or humidity controller.

6.Intelligent monitor is at customers’ option, which could monitor un-balanced current of neutral point when resistance cabinet is in normal operation, temp. of resistance pannel, and temperature of inside cabinet, measure transient current and records grounding times when single-phase grounding happens, reserve communication interface which could send monitored and recorded to master-control room so as to let operating people get the information in the first time.

5.If you are interested in our products,please let us know,we will try our best to meet you.(NGR Mingrui OEM supplier)

  

Transformer Neutral Grounding Resistors (MRD-BJ-NGR7)