MLV Varistor

MLV VaristorReliability ExperimentExperimentHigh Temperature Storage/Dry HeatTest Method and DescriptionThe specimen shall be subjected to 150 ± 2 for 1000 ± 12 hours in a thermostaticbath without load and then stored at room temperature and humidity for 1 to 2 hours.Therefore, the change of varistor voltage shall be measured.Temperature CycleThe temperature cycle of specified temper-ature shall be repeated five times and thenstored at room temperature and humidity forone or two hours. the change of varistorvoltage and mechanical damage shall beexamined.Step Temperature Period1 -40±3 30Min±32RoomTemperature1 hour3 125±3 30Min±34RoomTemperature1 hoursHigh Temperature Load/Dry Heat LoadAfter being continuously applied the maximum allowable voltage at 85 ± 2 for 1000±2 hours, the specimen shall be stored at room temperature and humidity for one or twohours, Therefore the change of varistor voltage should be measured.Damp Heat Load/Humidity LoadThe specimen should be subjected to 40± 2, 90 to 95 RH and the maximumallowable voltage for 500 hours and then stored at room temperature and humidity forone or two hours. Therefore the change of varistor voltage should be measured.Low Temperature StorageDirect contact electrostaticdischargeDirect air electrostaticdischargeThe specimen should be subjected to -50 ± 2, without load for 500 hours and thenstored at room temperature for one or two hours. Therefore the change of varistorvoltage should be measured.1.Discharge: contact electrostatic discharge; 2.Voltage8KVLevel43.Polarity+,- ; 4.Number: 10 times ; 5.Interval time1sec1.Discharge: air electrostatic discharge; 2.Voltage15KVLevel43.Polarity+,-; 4.Number: 10 times; 5.Interval time1~ 3secIEC61000-4-2 StandardSEVERITY LEVELAIRDIRECTDISCHARGEDISCHARGE1 2 KV 2 KV2 4 KV 4 KV3 8 KV 6 KV4 15 KV 8 KVRemark:More test information please contact sales.20