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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