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INSTRUCTION OF QJ SERLES GAS RELAY APPROVAL TO ISO9001 QUALITY SYSTEM CERTIFICATION SHENYANG SIXING RELAY MANUFACTURELTD CHINA Application The Gas relay series QJ is protective device for oil immered transformer. If a fault causes gas to be generated in the transformer or a heavy surge of insulating oil the Gas relay shall be in operation, the alarm signal is initeated and/or the transformer is tripped automatically. Principle of design When the transformer is operating normally, the Gas relay is completely filled with insulating oil .If a fault causes gas to be generated in the transformer, the bubble will filter along towards the conservator and accumulated at the highest point in the Gas relay. As the amount of gas coquette increases and the oil level in relay fall as a result, the cup also falls and eventually reaches point where it actuates the magnetic switch with the permanent magnet and so initiated the alarm signal. If the oil loses, the alarm signal is also initiated A violent generation of gas accompanied by a heavy surge of insulating oil results in operation of baffle plate. the magnetic is actuated by the permantmagnet on the baffle plate so it trips the transformer. 3、Technical data (1) Working temperature:　　-30°C～95°C (2) Switch Capacity:　　AC　220V　　0.3A　　COSφ≤0.6 　　　　　　 　DC　220V　　0.3A　　S≤5×10-3S (3) Operation Character:　　　　　　　　　　　　　　　 Table Ⅰ Type QJ-80 QJ-50 QJ-25 Range of flow（m/s） 0.7～1.5 0.6～1.2 1.0 Gas accumulation （ml） 250～300 ＜250 (4) Sealing character: filling transformer oil into the relay, Pressurizing normal temperature 200kPa,Continued 20 min and without any leakage. (5) Insulation Character Table Ⅱ Test item Voltage between contacts Voltage between terminal and earth Voltage between signal and trippingterminal Bring to bear on industry voltaye 　2000v /1 min　 2000v /1 min 2000v /1 min (6) Antivibration capacity When acceleration is 4g at