Supply Electric Transformer 250V Gas Relay Qj4-25 Qj3-40 Qj4-50 Qj4-80 Buchholz Relay for Transformer

• Customization: Available
• Type: Relay, Electric Parameter Relay
• Theory: Solid State Relay
• Model NO.: Supply electric transformer 250V gas relay QJ4-25
• Phase: 3
• Electricity Type: AC
• Number of Pole: 3
• Load: Medium Power Relay
• Protective Characteristics: Sealed Relay
• Action Principle: Electronic Type
• Size: Miniature
• Usage: Transformer Protective, Transformer
• Application: Protect Transformers From Faults Occurring Inside
• Model Number: Qj Series
• Product Name: Buchholz Relay, Gas Relay
• Feature: Easy Installation and Visible Inspection
• Transport Package: Pallet
• Specification: piece
• Trademark: xincheng
• Origin: China

Product Description

Overview
Quick Details
Place of Origin: China                                                        Brand Name: XINCHENG
Application: protect transformers from faults occurring inside transformer
Model Number: QJ series                                                  Function: Overvoltage
Product name: Buchholz relay, gas relay                          Usage: transformer protective 
Size: Miniature                                                                  Coil Structure: TOROIDAL
Feature: easy installation and visible inspection               Phase: Three 
Certification: ISO 9001-2015
 
Description:
Gas relay is a protection device for oil-immersed transformers and on-load switches with oil conservator. When a fault occurs inside the transformer (or on-load switch) and the gas generated by the decomposition of the transformer oil exceeds a certain amount, the signal contact of the relay is turned on and an alarm signal is issued. When a serious fault occurs inside the transformer (or on-load switch), there will be a surge of transformer oil, which will generate oil flow in the pipeline, impulse the baffle of the relay, and when the baffle reaches a certain limit position, the relay will trip The contact is connected and the power supply of the transformer is cut off to protect the transformer. If the oil level of the transformer is lowered due to oil leakage, the relay will also send out an alarm signal
 
The relay that monitors the tap changer is considered to be a tap changer protection relay and an oil flow relay. This is a monitoring device applied to an oil-immersed tap changer with an oil conservator, and its role is to protect the tap changer. And the transformer is protected from damage. When the oil flow of the oil conservator exceeds the limit, the monitoring relay will act and disconnect the connection between the tap changer and the transformer.
 
The gas relay is divided into on load gas relay (the radius of oil pipe is generally 50mm or 80mm) and body gas relay (the radius of oil pipe is generally 80mm). There are different models of gas relay, such as float type, baffle type, open cup type and so on.
 
QJ series gas relay is a main protection device for internal faults of 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 conservator, and the oil is decomposed when an internal fault occurs in the transformer. When gas is generated or the oil flow is surging, the contact of the gas relay is activated to connect the designated control circuit, and promptly send out an alarm signal or automatically cut off the transformer.
The relay shall be installed in the connecting pipe between the transformer and the oil conservator. The pipe should be as long and straight as possible and must be inclined upward, towards the conservator, at an angle of 3 to 7 degrees from the horizontal.
The transformer side of the relay shall have a straight pipe section at least five times the inner diameter of the pipe, and the oil conservator side shall have a straight pipe section at least three times the inner diameter of the pipe.
A machined surface is provided on the relay body for testing the installation of the relay. Whether in the inclined direction or at right angles to the pipe, the relay should be horizontal.
Technical parameter:

No.	type	Connecting  diameter DO	H	L	D	A	D1	D2	d
1	QJ4-25	Φ25	210	200					14
2	QJ4G-25		190
3	QJ6-25
4	QJ1-50	Φ50	213-215Reference number	160	Φ130	120	Φ100	Φ60	M12
5	QJ2-50			185	Φ125	125			Φ14
6	QJ3-50
7	QJ4-50
8	QJ5-50
9	QJ6-50			160	Φ130	120	Φ100	Φ60	M12
10	QJ7-50
11	QJ8-50			185	Φ125	125			Φ14
12	QJ9-50			160	Φ130	120	Φ100	Φ60	M12
13	QJ10-50			185	Φ125	125			Φ14
14	QJ11-50			160	Φ130	120	Φ100	Φ60	M12
15	QJ12-50			185	Φ125	125			Φ14
16	QJ13-50			160	Φ130	120	Φ100	Φ60	M12
17	QJ14-50			185	Φ125	125			Φ14
18	QJ15-50			160	Φ130	120	Φ100	Φ60	M12
19	QJ16-50			185	Φ125	125			Φ14
20	QJ17-50			160	Φ130	120	Φ100	Φ60	M12
21	QJ18-50			185	Φ125	125			Φ14
22	QJ19-50
23	QJ20-50

The data displayed are regular parameters, we can also customize to special requirements.
 
QJ-80 SERIES GAS RELAY:

No.	type	Connecting  diameter DO	H	L	D	A	D1	D2	d
1	QJ1-80	Φ80	213-215Reference number	160	Φ130	120	Φ100	Φ86	M12
2	QJ2-80			185	Φ160	160			Φ18
3	QJ3-80
4	QJ4-80
5	QJ5-80
6	QJ6-80			160	Φ130	120	Φ110	Φ86	M12
7	QJ7-80
8	QJ8-80			185	Φ160	160			Φ18
9	QJ9-80			160	Φ130	120	Φ110	Φ86	M12
10	QJ10-80			185	Φ160	160			Φ18
11	QJ11-80			160	Φ130	120	Φ110	Φ86	M12
12	QJ12-80			185	Φ160	160			Φ18
13	QJ13-80			160	Φ130	120	Φ110	Φ86	M12
14	QJ14-80			185	Φ160	160			Φ18
15	QJ15-80			160	Φ130	120	Φ110	Φ86	M12
16	QJ16-80			185	Φ160	160			Φ18
17	QJ17-80			160	Φ130	120	Φ110	Φ86	M12
18	QJ18-80			185	Φ160	160			Φ18
19	QJ19-80
20	QJ20-80

The data displayed are regular parameters, we can also customize to special requirements.
Technical parameter:

Type	Relay Pipe Diameter	Operation Temperature	Speed Range	Junction Point Capacity	Weight
QJ-25	Φ25mm	-30°c~+95°c	1.0m/s	220V 0.3A	6kg
				110V 0.3A
QJ-50	Φ50mm	-30°c~+95°c	0.6-1.0m/s	220V 0.3A	10kg
				110V 0.3A
QJ-80	Φ80mm	-30°c~+95°c	0.7-1.5m/s	220V 0.3A	11kg
				110V 0.3A

 
Assembling method:
the relay's pipe axis should be parallel to the transformer case cover, and it is allowed for the end leading to the conservator is higher, however the inclination between the axis and level surface may not exceed 4%

 
installation and application
(1) The overall size of QJ4‐25 Relay is shown as Fig. Above.
(2) The Gas relay is fitted in pipeline between the tank and conservator. pay special attention to the arrow on the housing the conservator.
(3) For filling oil, please all valves in the pipeline between the tank and conservator, blled the housing via the bleeder and then closed.
(4) Air pumped form the air plug, the reliability of "Signal" contacting motion can be checked.
(5) Cover twisted down, pin prossed, the reliability of "Trip" contacting motion can be checked.
5,Note
(1) Before the newly‐produced relay installed and used, the relay chip must be taken out and the locked banding used during the transportation should be demolished.
(2) The Gas relay must be checked by special device, then can mounted.
(3) The spring on the baffle plate can changed the length, adjusting the value for tripping. The other parts of the Gas relay can`t change at will.
(4) Replacing or adding some parts near the permanent magnet and magnetic switch, the non‐magnetic material must be used.
(5) The permanent magnet can be not intensely vibratied or in strong magnetic field, The permissible operating temperature is from ‐40°C to 100°C.
(6) The magnetic switch can't dismantle and the end of leads can`t bend at will.
 
Technical data:
(1) Working temperature:‐30°C~95°C
(2) Switch Capacity: AC 220V 0.3A COSφ≤0.6
DC 220V 0.3A S≤5×10‐3S
(4) Sealing character: filling transformer oil into the relay, Pressurizing normal
temperature 200kPa,Continued 20 min and without any leakage.
(5) Insulation Character
(6) Antivibration capacity
When acceleration is 4g at vibration frequency of 4~20Hz,the relay shall not do any.
 

Test item	Voltage between contacts	Voltage between terminal and earth	Voltage between signal and tripping terminal
Bring to bear on industry voltage	1000v /1 min	1000v /1 min	1000v /1 min

 
Structure performance:
Stainless steel material: preservative , extended service life
imported stainless float:
solve oil absorption aging
buoyancy problem
dustproof and waterproof housing:
logistics open-air warehouse use rainwater design
easy to use:
simple product structure
convenient operation
 
Main Features:
The oil level above the box cover can be observed through the left window, and the oil level below the box cover can be observed through the right window
Alloy wiring terminal, with good conductivity, firm wiring and wear resistance. It adopts the design of fast wiring terminal, which makes it easy to connect and tighten it once inserted.
Select high-strength corrosion-resistant alloy materials
The product surface adopts electrostatic spray coating technology, with uniform and beautiful paint surface and strong adhesion
Solve the problem of frequent alarm and trip. The oil level of alarm signal and cut-off signal can be set as required
 
Packaging & Delivery
Packaging Details : carton and packaged in plywood pallet, or by customer's demand
Port: Tianjin, Qingdao or Shanghai
Lead Time : 7-15days
 
 
Please Contact Us
 Miss: lydia
Mob: [phone]      Fax: [phone]