Description: JDZ type voltage transformer is a single phase and double windings casting with epoxy resin. It's designed for measurement of electronic energy and relay protection in electronic system at current of 50Hz. It has JDZ-3(W), JDZ-6(W) and JDZ-10(W) three types. Construction: The transformer is insulate epoxy resin cast structure with piled ring core wound with primary and secondary windings in a same core The secondary lead is out through the two bolts on the cast base to the a.x. The primary lead is out through the two high-tension terminals to be A.X. Service condition: 1.altitude: not over 1000m, 2.ambient temperature: -5 degree to +40 degree 3.relative humidity: less than 85%, at 20 degree 4.the product has passed the direct vibration test with the intensity of 0.4g three sine waves, equivalent to nice-degree earth quake on the richter scale. 5.This product can be used in condition of pollution.