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Baoding Mingrui Optoelectronics Technology Co.Ltd
NGR,Neutral Grounding Resistors
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Transformer Neutral Grounding Resistor Cabinet (NGR )/Electrical Earthing Resistance Cabinet

Baoding Mingrui Optoelectronics Technology Co.Ltd

Transformer Neutral Grounding Resistor Cabinet (NGR )/Electrical Earthing Resistance Cabinet

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Place of Origin : hebei

Brand Name : MINGRUI

Model Number : MRD-BJ7

Certification : IEEE32

Price : 58000

Packaging Details : wooden case

Delivery Time : 25-30 days

Payment Terms : T/T

Supply Ability : 3000 sets

MOQ : 1 set

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Transformer Neutral Grounding Resistor Cabinet (NGR )/Electrical Earthing Resistance Cabinet:

Diagram for Installation and Wiring AC distribution board

NGR Parameters


FUNCTION

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).

SPECIFICATIONS

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.

RANGE

• Rated current: from 1 amp to 2000 A

• Rated voltage: from 6to 20 kV

• Rated Resistance: from 1 ohm to 2000 ohm

• Rated time: 1 sec to continuous time rating

TESTING AND QUALITY

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

CONSTRUCTION

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.

ENCLOSURE FEATURES

• 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.

ENCLOSURE OPTIONS

•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.

OPTIONS

Current or potential transformers mounted and prewired at our facility

ON or OFF Load disconnecting switches

Order Requirements

To serve you better, please kindly offer following information when ordering

1 generator rated voltage, transformation ratio of grounding transformer, resistance value;

2 insulation form of grounding transformer;

3 transformation ratio of current transformer ;

4 color of cabinet, wiring from the top or bottom;

5 time of current flowing-through

6 material and color of box, IP protective grade, colour and installation location.


Product Tags:

neutral grounding resistors

      

neutral earthing resistors

      

grounding resistors

      
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