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:QJ5-80 DN80
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
(1) The function of a gas relay is to signal the operator or cut off the power supply to protect the transformer in the event of insulation failure, wire short circuit, and core burning. (2) Basic working principle: composed of an open cup and a dry...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ40
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-80
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
The Buchholz relay is an important safety protection device on the oil immersed transformer. It is installed on the joint pipe between the transformer tank cover and the oil conservator. Under the action of the gas or oil flow generated by the...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ50
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
Introduction to Buchholz relay 1. Relay pipeline diameter: QJ1-25 type DN25 (1 inch), QJ1-50 is DN50 (2 inches), and QJ1-80 is DN80 (2.667 inches) 2. Working temperature of relay: -30 ℃ -+95 ℃ 3. Signal contact action gas capacity: 250-300cm3 4....
USD 65.00 ~ 78.00
Min. Order:1 Piece/Pieces
Model No:QJ series
QJ4-25 gas relay is a main protection device for internal faults in oil-immersed transformers and oil-immersed on-load tap changers. The gas relay is installed on the connecting pipeline between the transformer and the oil storage tank. When an...
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
The gas relay is an important safety protection device on the oil immersed transformer. It is installed on the joint pipe between the transformer tank cover and the oil conservator. Under the action of the gas or oil flow generated by the internal...
USD 65 ~ 79
Brand:TNNPI
Min. Order:1 Piece/Pieces
Model No:QJ4-50
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:QJ4-25 QJ4G-25 QJ6-25
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:QJ10-80
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:QJ4-25
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:QJ20-50
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:QJ425
Transportation:Ocean,Land,Air,Express,Express
Packaging:Carton
Supply Ability:10000
Place of Origin:China
Productivity:100000
General technology parameters of relay: 1. Working temperature: -30 ° C~95 ° C 2. Contact capacity: AC 220V 0.3A COS φ≤ zero point six DC 220V 0.3A S≤5 × 10-3S Gas relay is a main protection device for internal faults of oil immersed transformer and...
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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