QJ 2-40 gas relay
The QJ 2-40 series gas relay is mainly used to protect various types of oil-immersed, hermetically sealed transformers. When a transformer is in operation, gas is generated due to internal faults and accumulates in the gas relay's gas collecting chamber. When the gas volume reaches a certain level, it triggers an alarm or disconnects the contacts, outputting an alarm signal or a cut-off signal to protect the transformer.
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Product Description
Product Introduction
The QJ 2-40 series gas relay is mainly used to protect various types of oil-immersed, fully sealed transformers. When the transformer is in operation, gas is generated due to internal faults, and the gas accumulates in the gas collection chamber of the gas relay. When the gas volume reaches a certain level, it triggers an alarm or disconnection contact, outputs an alarm signal or disconnection signal, thereby achieving the purpose of protecting the transformer.
Model Description
Annotation Example: QJ2-40TH indicates that the alarm signal gas value is 20mm below the cover, and the disconnection signal gas value is 40mm below the cover. (Special alarm signal and disconnection signal oil level values need to be indicated on the order)
Special Environments:
“TH”- For humid and tropical regions
“TA”- For tropical dry regions
Unspecified general type
Conditions of Use
3.1 Ambient temperature: -30℃～50℃, allowable operating temperature: -40℃～100℃;
3.2 Installation location: On the transformer cover;
Appearance and Installation Dimensions
Wiring Diagram and Contact Capacity
| Power Supply Type | Operating Voltage | Operating Current |
| Direct Current DC | 220V | 0.3A |
| Alternating Current AC |
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