1. APPLICATION:
Type UMZ12-1 voltage transformer is of epoxy resin casting fully-enclosed structure. It is used for voltage\power measurement and relay protection in indoor electric circuit for connected between phase to earth with rated frequency 50Hz or 60Hz.
2. SERVICE CONDITION
3.1 Altitude: Not over 1000m above sea level;
3.2 Variety of ambient temperature is between -5~+40C;
3.3 Relative humidity: Not more than 85%(at 20 C);
3.4 This product is capable to bear vibration test with the intensity of 0.4g sine waves that are equivalent to nine-degree earthquake on the Richter Scale;
3.5 This product can be used for pollutant condition.
Audited Supplier 
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