Thermal Overload Relay

Thermal Overload Relay

3UA thermal relay is suitable for using in power system with AC 50Hz, rated operation voltage up to 660V and 1000V, in main circuit, 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 overleaping arrangement, for easy selecting by the customers from -25C to +55C 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

3UA50 Rated operating current: 12.5A

Rated insulation voltage: 660V

Current setting range: 0.1A to 12.5A

3UA52 Rated operating current: 25A

Rated insulation voltage: 660V

Current setting range: 0.1A to 25A

3UA54 Rated operating current: 32A

Rated insulation voltage: 660V

Current setting range: 4A to 32A

3UA58 Rated operating current: 80A

Rated insulation voltage: 1000V

Current setting range: 16A to 80A

3UA59 Rated operating current: 63A

Rated insulation voltage: 660V

Current setting range: 0.1A to 63A

3UA62 Rated operating current: 180A

Rated insulation voltage: 660V

Current setting range: 55A to 180A

3UA66 Rated operating current: 400A

Rated insulation voltage: 660V

Current setting range: 80A to 400A

3UA68 Rated operating current: 630A

Rated insulation voltage: 660V

Current setting range: 320A to 630A

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