- 产品用途Product Usage
QJ series gas relay (hereinafter referred to as relay) is a kind of protection used by oil-immersed transformers.
When the oil is decomposed to generate gas or cause oil flow to surge due to internal faults of the transformer, the contact of the relay is actuated, the specified gas circuit is turned on, and a signal is issued in time or the operation of the transformer is automatically cut off.
When the transformer is working normally, the relay is filled with transformer oil, such as the transformer appears in operation.
A slight fault, the gas generated by the decomposition of the transformer oil will accumulate in the upper part of the relay, forcing the float on the relay to fall. When the upper float is lowered to a certain position, the magnet turns the signal contact on and sends an alarm signal. However, the lower float is not affected because a certain amount of gas can flow through the pipeline to the oil conservator. However, if the transformer oil is lost due to oil leakage, the oil level will drop. At this time, the upper float will sink. First, an alarm signal will be issued. When the liquid continues to drain, the oil in the oil conservator, pipeline and gas relay will be discharged. air. As the oil level continues to drop, the lower float sinks, and through the movement of the float, the contact is turned on, and all the power connected to the transformer is cut off.
1 .conditions of use
1.1允许工作温度 -30℃~ +95℃
1.1 Allowable operating temperature -30 ° C ~ +95 ° C
1.2 Installation method: Installed in the transformer oil tank or the connection between the oil compartment of the on-load tap-changer and the oil conservator, and the pipeline axis of the relay should be horizontal, allowing the end to the oil conservator to be slightly higher, but the pipeline axis and The slope of the horizontal plane does not exceed 4%.
2. Technical parameters
2.1额定容量 AC 220V 0.3A COSΦ≤0.6
Rated Capacity DC 220V 0.3A S≤5X10 S
2.2安装管路通经：Φ25 Φ50 Φ80
2.2 installation pipeline through: Φ25 Φ50 Φ80
2.3 Insulation strength: between the contacts and the outlet terminal to the ground 2000V 1min
2.3 action characteristics
2.4 Sealing performance: The relay is filled with transformer oil and pressurized at 200KPa at normal temperature for 20 minutes without leakage.
2.5 insulation performance:
2.6 seismic performance
When the vibration frequency is 4~20Hz and the acceleration is 4g, the relay does not malfunction.
2.7 relay anti-spraying level is IPX5
2.8 Number of terminals
Installation and use
1.The dimensions of the relay are shown in Figure 2, and the dimensions are shown in Table 3.
2. The relay is installed in the connecting line between the transformer tank and the oil conservator. When installing, the arrow on the relay points to the side of the conservator.
3. After installation, open the oil valve in the connecting line, and at the same time open the gas discharge gas to make the relay full of transformer oil. Close the gas plug when the oil flows out of the gas plug.
4 .Electrical wiring diagram is shown in Figure 3.
1. The new factory relay must be taken out of the relay core before installation and removal.
2. The relay must be inspected and tested by a special test device.
3. A spring is installed on one side of the baffle to change the length of the spring, and the oil flow rate of the trip contact can be adjusted.
degree. The remaining parts must not be arbitrarily transferred.
4. When replacing or adding magnets and parts near the joints, non-magnetic materials should be used.
5. The magnet cannot be shaken vigorously, nor can it be placed in a strong magnetic field and in environments exceeding 100 ° C and below -40 ° C.
6. The joints must not be dismantled or unloaded at will, especially the root leads do not allow any bending to avoid damage.
Structure, shape and size
Figure 1 working principle diagram
1.探针拨片 2.动板 3.探针 4.上浮子
5.轻瓦斯触点 6.下浮子 7.缺油触点 8.重瓦斯触点组
Figure 2 external dimension drawing
图三接线图Figure 3 wiring diagram
Address:DaotaiVillage ,ZhangjiatunTowXinmin City,Liaoning
Shen Yang Tong Meng Transformer Accessory Manufacturing Co.,Ltd