Shanghai Huabang Industrial Business Network - gas relay

[gas relay]QJ1-25 type gas relay

2026-6-14 10:05:44

Technical parameters of QJ1-25 gas relay

1. Flow rate range: 1.0m/s Factory setting: 1.0m/s
2. Rated contact capacity: 220V 0.3A, 110V 0.6 (S �� 5 × 10-3)
3. Insulation strength: 2000V/min
4. Sealing performance: The relay is filled with transformer oil and pressurized to 200Kpa/20min at room temperature

Installation performance:
D ��25�� D1 ��85; do M8; A ��70�� H ��155�� B /, 110

[gas relay]QJ1-50 type gas relay

2026-6-14 10:05:36

Technical parameters of QJ1-50 gas relay

1. Flow rate range: 0.6-1.0m/s Factory setting: 0.8m/s
2. Rated contact capacity: 220V 0.3A, 110V 0.6 (S �� 5 × 10-3)
3. Insulation strength: 2000V/min
4. Sealing performance: The relay is filled with transformer oil and pressurized to 200Kpa/20min at room temperature

Installation size:
D ��50�� D1 ��130�� do M12; A 120; H ��225�� B /; L 160.

[gas relay]QJ1-80 type gas relay

2026-6-14 10:05:28

Technical parameters of QJ1-80 gas relay

1. Flow rate range: 0.7-1.5m/s Factory setting: 1.0m/s
2. Rated contact capacity: 220V 0.3A, 110V 0.6 (S �� 5 × 10-3)
3. Insulation strength: 2000V/min
4. Sealing performance: The relay is filled with transformer oil and pressurized to 200Kpa/20min at room temperature

Installation size:
D ��80 ��D1 ��130��do M12��A 120��H ��225 ��L 160

[gas relay]QJ4-25 type gas relay

2026-6-14 10:05:19

Technical parameters of QJ4-25 gas relay

1. Flow rate range: 1.0m/s Factory setting: 1.0m/s
2. Rated contact capacity: 220V 0.3A, 110V 0.6 (S �� 5 × 10-3)
3. Insulation strength: 2000V/min
4. Sealing performance: The relay is filled with transformer oil and pressurized to 200Kpa/20min at room temperature

installation dimensions
D ��25�� D1 ��85��do ��14��A 100��H ��200 ��L 200

[gas relay]QJ4-50 type gas relay

2026-6-14 10:05:10

QJ4-50 gas relay

1. Flow rate range: 0.6-1.0m/s Factory setting: 0.8m/s
2. Rated contact capacity: 220V 0.3A, 110V 0.6 (S �� 5 × 10-3)
3. Insulation strength: 2000V/min
4. Sealing performance: The relay is filled with transformer oil and pressurized to 200Kpa/20min at room temperature

installation dimensions
D ��50 D1 ��125 do ��14 A 125 H ��250 B ��100 L 185

[gas relay]QJ4-80 type gas relay

2026-6-14 10:05:02

The QJ4-80 gas relay is a protective device used in fully sealed transformers. The gas relay, hereinafter referred to as the relay, is installed on the oil tank of the fully sealed transformer. When a fault occurs inside the transformer, causing the oil to decompose and produce gas or the oil level to be removed from the frame, the contact of the gas relay will act to connect the designated control circuit and promptly send a signal or automatically cut off the power supply of the transformer.

Technical parameters of QJ4-80 gas relay

1. Flow rate range: 0.7-1.5m/s Factory setting: 1.0m/s
2. Rated contact capacity: 220V 0.3A, 110V 0.6 (S �� 5 × 10-3)
3. Insulation strength: 2000V/min
4. Sealing performance: The relay is filled with transformer oil and pressurized to 200Kpa/20min at room temperature

Installation size D �� 80 D1 �� 160 do �� 16 A 160 H �� 250 B �� 100 L 185

[gas relay]QJ4-50C type multifunctional gas relay

2026-6-13 19:20:34

Structural characteristics of QJ4-50C multifunctional gas relay product

1. This product has an oil level display function, and the oil level can be observed through the window.
2. At the same time, it has an installation detection function. After the product is installed and wired, the probe can be used to detect whether the wiring is correct and whether the cut-off signal can be output normally.
3. The gas detection range and the oil level of the alarm signal can be set as needed (for light gas).
4. The range of oil flow velocity detection and the flow rate for cutting off signals can be set as needed (for heavy gas).
5. Equipped with temperature display and alarm function. By outputting temperature signals through temperature sensors, the transformer oil temperature can be displayed on the remote temperature display controller, and an alarm or cut-off signal can be issued to limit the temperature.

Technical parameters of QJ4-50C multifunctional gas relay

Relay pipeline diameter: QJ4-50C type is �� 50mm
Working temperature: -30 ��+95 ��
(Light gas) signal contact action gas volume: 250-300cm3
Contact rated capacity: 220V 0.3A
Insulation strength: Apply a voltage of 2000 volts between two sets of terminals for 1 minute
Apply a voltage of 2000 volts between the contact terminals of the contact point for 1 minute
Apply voltage of 2000 volts to the contact terminal for 1 minute
Sealing performance: The relay is filled with transformer oil.
At room temperature and under pressure: 200Kpa for 20 minutes without any leakage.
Seismic resistance: The relay does not malfunction when the vibration frequency (sine wave) is 4-20Hz and the acceleration is 4g.

[gas relay]QJ2-40C type multifunctional gas relay

2026-6-13 19:20:25

QJ2-40C Multi functional Gas Relay

1. The floating ball is made of imported stainless steel material, which completely solves the problems of oil absorption aging and buoyancy.
2. The gas detection range is large, completely solving the problem of frequent alarms and trips. The oil levels for alarm signals and cut-off signals can be set as needed.
3. It has installation detection function. After the product installation and wiring are completed, the probe can be used to detect whether the wiring is correct and whether the alarm signal and disconnection signal can be output normally.
4. It has a low oil level alarm function.
5. It has an oil level display function, and the oil level above the lid can be observed through the left window, while the oil level below the tank lid can be observed through the right window.
6. It has the function of a pressure relief valve.
7. It has temperature display and alarm function. By outputting temperature signals through temperature sensors, the transformer oil top temperature can be displayed on the remote temperature display controller, and an alarm or cut-off signal can be issued to limit the temperature.

Technical parameters of QJ2-40C multifunctional gas relay
Manufacture according to the drawings and technical specifications
Pipeline diameter: �� 40mm
Alarm signal gas volume: 0mm
Cut off (trip) signal gas volume: -20mm
Temperature alarm signal: 85 ��
Contact capacity: DC/AC 220V 0.3A
Sealing test pressure: 200kPa for 20 minutes
Anti water spray test: protection level IPX5

QJ2-40C Multi functional Gas Relay

[gas relay]QJ-40 type gas relay

2026-6-13 19:20:16

Product Structure Features
When the transformer is running normally, the interior of the gas relay is filled with transformer oil. When there is a fault inside the transformer, the gas generated by the decomposition of transformer oil accumulates in the relay's gas collection chamber. The air pressure forces the oil level to drop, and the float ball drops with the oil level, and the magnetic switch A or B is linked to close. When the gas reaches 170mI, the magnetic switch A is attracted, the signal circuit is connected, and an alarm signal is issued. If the oil level in the fuel tank drops due to other reasons (such as electrical leakage, etc.), it will also act on the signal circuit to issue an alarm signal. When a serious fault occurs inside the transformer, a large amount of gas will be generated. When the gas reaches 260mI or more, magnetic switch B will be closed, triggering a trip device to disconnect the transformer from the power grid, thus achieving the purpose of protecting the transformer.

Technical parameters of QJ-40 gas relay

Manufacture according to the drawings and technical specifications
Pipeline diameter: �� 40mm
Alarm signal gas volume: 170mL ± 10%
Cut off (trip) signal gas volume: 260mL ± 10%
Contact capacity: DC/AC 220V 0.3A
Sealing test pressure: 200kPa
Insulation withstand voltage test: 2000V
Anti water spray test: protection level IPX5
Seismic resistance test: frequency 4-20Hz, speed 40M/S2

QJ-40 gas relay

[gas relay]QJ4-80C type multifunctional gas relay

2026-6-13 19:20:07

QJ4-80C Multi functional Gas Relay

1�� Overview General
QJ4-80C gas relay is a protective device with an oil storage tank transformer or on load tap changer. The relay is installed in the connecting pipeline between the transformer, on load tap changer oil tank, and on load tap changer.
Two. structure
As shown in the structural core of the relay, when the transformer is working normally, the relay is generally filled with transformer oil. If there is a minor malfunction inside the transformer, the gas generated by oil decomposition will accumulate at the top of the container, forcing the oil level to drop under pressure. When the floating ball descends to a certain limited position with the oil level, the associated dynamic magnetic switch will close, connect the signal circuit, and emit a signal; When the oil temperature reaches 85 degrees, a signal is emitted. If there is an eye fault inside the transformer, oil surge will occur, causing oil flow in the connecting pipe and triggering the baffle G. When the baffle moves to a certain limit position, it will be linked with magnetic cutting off all power sources connected to the transformer, thus protecting the transformer.