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Baoding Mingrui Optoelectronics Technology Co.Ltd
NGR,Neutral Grounding Resistors
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NGRs Neutral Ground Resistors (MRD-BJ-NGR4)

Baoding Mingrui Optoelectronics Technology Co.Ltd

NGRs Neutral Ground Resistors (MRD-BJ-NGR4)

Place of Origin : hebei

Brand Name : MINGRUI

Model Number : MRD-BJ-4

Certification : ISO9001:2000

Price : 25000

Packaging Details : WOODEN CASE

Delivery Time : 20-25 days

Payment Terms : T/T

Supply Ability : 3000 sets

MOQ : 1 set

Shipping : FOB by sea

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NGRs Neutral Ground Resistors (MRD-BJ-NGR4)


Neutral Grounding Resistors are used to protect power transformers, power generators and other associated equipment in your power systems against 50/60 Hz faults (short circuit) and transient phenomena (lightning).


There are six parameters needed to specify the neutral grounding resistor.
1. Rated voltage line to neutral or system voltage.

2. Rated fault current.

3. Rated “duration time” of the line to neutral voltage not exceeding the allowable temperature rise.

4. Rated Resistance.

5. Application environment, indoor or outdoor.

6. Enclosure material, ss plate or normal cold rolled sheet.


• Rated current: from 1 amp to 2000 A

• Rated voltage: from 6 to 20kV

• Rated Resistance: from 1 ohm to 2000 ohm

• Rated time: 1 sec to continuous time rating


with IEEE-32. Routine tests performed on each Neutral Grounding Resistor are measurement of resistance, high voltage power frequency, insulation measurement, aspect verification, dimensional control. Mingrui’s internal quality system has been developed and certified under ISO 9001 quality system


Standard unit includes the stainless steel resistor assembly plus all the required insulators, internal connections and hardware installed in a standard safety enclosure. Neutral Grounding Resistor units are completely assembled, prewired, and tested at our facility. For shipping all units are crated for added protection and ease of handling.


• Forged eyebolts in all four corners for easy hoisting.
• Removable front and rear louvered covers for easy access for connection and inspection.

• Corrosion resistant nameplate provides complete ratings and manufacturers information.

•Heavy gauged enclosure polyester powder coated finish provides maximum protection.


•Stainless steel, cold rolled plate construction. Custom paint finish is available.
• Top or side mounted entrance bushing(s).
• Screened covers for indoor applications.
• Support stands for elevating the enclosure above ground.


Current or potential transformers mounted and prewired at our facility

ON or OFF Load disconnecting switches

  • Baoding Mingrui Optoelectronics Technology Co.Ltd,an electrical equipment in China,established since 2008 with certificate ISO9001:2000 quanlity management system from SAI Global.
  • We have long experience in Engineering and manufacturing low and Medium-Voltage Neutral grounding resistor(up to 35KV).LV Main Distribution Panel for transformer (0.4~35KV)/ Generator neutral grounding resistor Control Panel (6~20KV).Current Transformer and Discharging Spark Gap device.
  • Our market segments are electrical utility (power generation and transmission and distribution),oil and gas,industrial,high rise building and infrastructure,Please look at our Company Profile to show our complete product line,production facilities, and project reference.
  • We have technical collaboration with foreign electrical equipment manufacturers,such as:
  • Products with IEC standard;
  • Products with ANSI,IEEE standard;
  • We hope to have the business relationship with you sincerely.And look forward to your good reply soon.

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