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3UA thermal relay is suitable for using in power system with AC
50Hz, rated operation voltage up to 660V and 1000V, in main circutit,
current from 0.1A to 630A. It is used to protect AC three-phase
asynchronous motor against overload and open-phase.
The current setting value can be regulated
and the setting current values of many thermal elements are intercrossing
overlepping arrangement , for easy selecting by the customers from
-25≧ to +55≧ air temperarature as the products have temperature
compensating .The relays have the test push-button for breaking
NC contacts,the operating indication and free trip characteristics.
The items conform to IEC292-1,IEC337-1&VDE0660.
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