Mingrui Optoelectronics Technology Co., Ltd.
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Used For Power Plant Distribution Equipment---NGRs Neutral Grounding Resistors

— neutral earthing resistor, neutral grounding resistors, grounding resistors
Product Category: Power Distribution Equipments
Sales Method: Export, Manufacture
Payment Term: T/T
Min. Order Unit Price
1 set
Contact Info

Mrs.Mery Miao

Address: China (mainland) Hebei Baoding,No 118

Product Detail

Product Attribute:

  • China (mainland) More >
  • MRD-BJ78
  • Mingrui
  • ISO9001:2000
  • 05/31/2012
  • 05/31/2012

Additional Info.:

  • by sea FOB tianjin
  • wooden case

Product Content Description:

Used For Power Plant Distribution Equipment---NGR:

Professional Indoor 20KV NGR Switchgear Electrical Power Distribution Control Cubicle Equipment/Distribution Panel


Generator is the motive power of power system. And it must have good adaptability to sudden fault during operation. The ground techniques has close relation to neutral grounding technique.MRD-FD series generator neutral resistance box is dedicatedly applied to integrated equipment in power station where the generator neutral grounding through high resistance. The mian grade of voltage is from 6KV to 20KV, when one point of stator grounds it could limit grounding current at a very low level and effectively suppress arc grounding transient overvoltage.


l Indoor application

l Environment temperature between -40°C and +40°C

l Altitude does not excess 3000m

l Rlative humidity is not more than 95% (25°C)

l Power grid frequency: 58~62Hz(60Hz system),48~52Hz(50Hz system)

l No corrosive gas or stem and no explosive dust on installation site.


Insulation Grade: H
Cooling-down Method: AN
Temperature Rise ≤ 100K
Proctective Grade of paper insulation dry-type connected transformer is IP00 (without casing), IP20 and ip23 (with casing)
Insulation level, impedance voltage, no-load loss and on-load loss are as per National Standards.
Test of inpedance: high voltage to low voltage or grouding ≥300 MΩ, low voltage to grounding ≥100 100 MΩ


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
Quantity Per Month: 30 sets
Patent No./Country: Made in China
Delivery Way - Date Of Delivery: 20-30 days

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