Baoding Mingrui Optoelectronics Technology Co., Ltd.
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  • Contact Person : Ms. Tong Angela
  • Company Name : Baoding Mingrui Optoelectronics Technology Co., Ltd.
  • Tel : 86-134-72200523
  • Fax : 86-312-3110105
  • Address : Hebei,Baoding,No.118 West Fuxing Road,Baoding city, Hebei province,China
  • Country/Region : China
  • Zip : 071051

33kv Transformer Neutral Grounding Resistor

33kv Transformer Neutral Grounding Resistor
Product Detailed
Related Categories:Power Distribution Equipment
33kv Transformer Neutral Grounding Resistor standard:IEEE32 service: 50/60Hz system resistor value:1~2000ohms current:1~2000

33kv Transformer Neutral Grounding Resistor

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 0.4 to 35kV

• Rated Resistance: from 1 ohm to 2000 ohm

• Rated time: 1 sec to continuous time rating

TESTING AND QUALITY

All Mingrui Neutral Grounding Resistors are designed, rated, manufactured and tested in strict compliance 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 groundingl transformers mounted and prewired at our facility• ON or OFF Load disconnecting switches

The design of the product complys with the flowing standard:

Dl/780-2001       distribution system neutal grounding resistor 

GB6450               dry-type power transformer  

Dl/T620-1997    overvoltage protection and insulation coordination of AC electrical equipment 

GB/T16927-1997    high voltage testing technology 

GB1208-1997       current transformer 

GB4208-93         case protection grade  

IEEE32-1972 STANDARD  technonolies,terms,and experiments of neatal grounding equipments  

GB311.1-1997      insulasion coordination of highvoltage transmission and distribution device

DL/T593-1996    common ordering technical conditions of higvoltage switch device

GB50150-1991      standards of electrical equipment handing-over and experiment of electrical device installment project

33kv Transformer Neutral Grounding Resistor



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