Protection of on-Load Oil-Immersed Transformer Tap Changer Relay for Transformer

• Customization: Available
• Theory: Electronic Type
• Phase: 3
• Model NO.: Relay for Transformer
• Electricity Type: AC and DC
• Load: High Power Relay
• Protective Characteristics: Open Relay
• Action Principle: Electromagnetic Type
• Size: Customized
• Type: Electric Parameter Relay
• Voltage Between Contacls: 2000V/1min
• Working Temperature: -30ºC~95ºC
• Switch Capacity: AC 220V 0.3A
• Installation Dimensions: Qj1 - 50
• Transport Package: Wooden Box/Pallet
• Specification: Customized
• Origin: Hangzhou
• Production Capacity: 600pieces/Month

Product Description

Product Description

Gas relay, also known as gas relay, is one of the important protection devices for oil-immersed transformers. It is installed in the connecting pipe between the oil tank and the oil pillow of the transformer. It is mainly used to detect abnormal gas or oil flow caused by internal faults of the transformer, thereby protecting the transformer.
Structure and Principle
-structure
Gas relays are mainly composed of containers, floats (or open cups), reed contacts, baffles, probes and other components.
The container is the shell of the gas relay, with operating components such as a float or open cup inside.

Product advantages

-High sensitivity
It can keenly detect a small amount of gas or oil flow changes generated inside the transformer, ensuring that signals can be sent out or protective measures can be taken in the early stages of a fault.
-High reliability
The use of high-quality materials and precise manufacturing processes ensures stable performance of the relay during long-term operation and reduces the probability of malfunction and rejection of operation.
-Easy to install and maintain
Its structural design is reasonable and it is convenient to install on the connecting pipe of the transformer. At the same time, during daily maintenance, the internal conditions of the relay can be viewed through the observation window to facilitate inspection and testing.

 

Product Parameters

 Technical data:
-Working temperature:-30ºC~95ºC       2. Switch Capacity:AC 220V 0.3A COS≤0.6 DC 220V 0.3A S≤5×10-³S
-Operation Character:

Type	QJ-80	QJ-50	QJ-25
Range of flow(m/s)	0.7-1.5	0.6-1.2	0.8-1.2
Gas accumulaton(ml)	250-300		<250

-Sealing character:filling transformer oil into the relay, Pressurizing normal temperature 200Kpa, Continued 20min and without any leakage.

 

- Installation dimensions:

Product Model	D (mm)	H (mm)	L (mm)	C (mm)	A (mm)	E (mm)	B (kg)	Number of Outlets	Thread of Outlet (Internal Thread)
QJ1 - 50	Φ50	225	160	Φ130	120	M12	90	10	1
QJ4 - 50, QJ5 - 50	Φ50	225	185	Φ125	125	Φ14	90	11	1
QJ3/12 - 50	Φ50	240	185	Φ125	125	Φ14	90	11	2
QJ13/14 - 50	Φ50	225	185	Φ125	125	Φ14	90	11	2
QJ1 - 80(QJ6 - 80)	Φ80	220	160	Φ130	120	M12	90	9	1 (M20×1.5)
QJ4 - 80, QJ5 - 80	Φ80	240	185	Φ160	160	Φ18	90	13	1
QJ3/12 - 80, QJ13/14 - 80	Φ80	235	185	Φ160	160	Φ18	90	13	2

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