Model No:QJ
Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap changer, oil level...
Model No:QJ
Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap changer, oil level...
Model No:QJ
Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap changer, oil level...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap changer, oil level...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap changer, oil level...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap changer, oil level...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ Series
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Buchholz Relay Gas relay is a main protection device for internal faults of oil immersed transformer and oil immersed on load tap changer. The gas relay (gas relay) is installed on the connecting pipeline between the transformer and the oil...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:WST
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Gas relay is a main protection device for internal faults of oil immersed transformer and oil immersed on load tap changer. The gas relay (gas relay) is installed on the connecting pipeline between the transformer and the oil conservator. When the...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ4-25,QJ4G-25
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Buchholz relay is a component that uses the hot oil flow and hot air flow generated during faults in a transformer to drive the relay to operate. Therefore, it is a protective element of the transformer, which is installed in the pipeline between...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ-80/50/25
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Our company produces various high, medium and low voltage transformers: high voltage main transformer, fully sealed transformer, conservator transformer, mining transformer, electric furnace transformer, pad mounted transformer, explosion-proof...
Model No:QJ
Product description Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap...
Product description Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap...
Model No:QJ
Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap changer, oil level...
Model No:QJ
Product description Gas relay is a main protection device for internal faults of oil immersed transformer and oil immersed on load tap changer. The gas relay (gas relay) is installed on the connecting pipeline between the transformer and the oil...
Model No:QJ
Product description 1. The relay shall undergo appearance inspection and reliability inspection of signal circuit and trip circuit once a year. 2.The relay in operation shall be uncovered once every two years for internal structure and action...
Model No:QJ
Product description Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap...
Model No:QJ
Product description Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ2-80
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Gas relay is a main protection device for internal faults of oil immersed transformer and oil immersed on load tap changer. The gas relay (gas relay) is installed on the connecting pipeline between the transformer and the oil conservator. When the...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap changer, oil level...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap changer, oil level...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ Series
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap changer, oil level...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Gas relay is a main protection device for internal faults of oil immersed transformer and oil immersed on load tap changer. The gas relay (gas relay) is installed on the connecting pipeline between the transformer and the oil conservator. When the...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ25
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Gas relay is a main protection device for internal faults of oil immersed transformer and oil immersed on load tap changer. The gas relay (gas relay) is installed on the connecting pipeline between the transformer and the oil conservator. When the...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Henan New Electric Power Co., Ltd deals in the R&D, manufacturing and sales of various medium, high and low voltage transformers and transformer accessories. The transformer accessories mainly include Buchholz relay, tap changer, oil level...
Measuring contact resistance
Use the resistance gear of the multimeter to measure the resistance of normally closed contacts and moving points. The resistance value should be 0; The resistance of normally open contacts and moving points is infinite. From this, it can be distinguished which is normally closed contact and which is normally open contact.
When selecting relay, the power supply voltage of general control circuit can be used as the basis for selection. The control circuit shall be able to provide sufficient working current for the relay, otherwise the relay closing is unstable. After consulting the relevant data to determine the service conditions, find out the model and specification number of the required relay. If the old relay needs to be replaced, confirm whether the flange size is appropriate.
Before selecting Gas Relay, understand the necessary conditions:
① The power supply voltage of the control circuit and the maximum current that can be provided;
② Voltage and current in the controlled circuit;
③ The controlled circuit needs several groups and what form of contacts.
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