3UA series thermal relays are suitable for the power system with AC 50/60Hz, nominal voltage 660-1000V, and rated current 0.1~630A. It is used for overload and phase failure protection of three-phase AC asynchronous motors. The setting current of some heating elements is arranged in a cross-overlapping manner. It is convenient for users to choose. It has temperature compensation within the air temperature range of -25°C to 55°C. It has a test button to disconnect the normally closed contact and has an action indicator and an automatic trip indicator. The product meets the lEC60947-4 standard.
Applicable scope：
3UA series thermal relays are suitable for the power system with AC 50/60Hz, nominal voltage 660-1000V, and rated current 0.1~630A. It is used for overload and phase failure protection of three-phase AC asynchronous motors. The setting current of some heating elements is arranged in a cross-overlapping manner. It is convenient for users to choose. It has temperature compensation within the air temperature range of -25°C to 55°C. It has a test button to disconnect the normally closed contact and has an action indicator and an automatic trip indicator. The product meets the lEC60947-4 standard.
Technical Parameters：
| type | Rated working current(A) | Rated insulation voltage(v) | Current adjustment range(A) |
| 3uUA50 | 12.5 | 660 | 0.1~0.16,0.16~0.25,0.25~0.4,0.32~0.63, 0.63~1.0.0.8~1.25,1.0~1.6,1.25~2.0 1.6~2.5,2.0~3.2,2.5~4.0,3.2~5.0 4.0~6.3,5.0~8.0,6.3~10.0,8.0~12.5 |
| 3UA52 | 25 | 660 | 0.1~0.16,0.16~0.25,0.25~0.4,0.4~0.63, 0.63~1.0,0.8~1.25,1.0~1.6,1.25~2.0 1.6~2.5,2.0~3.2,2.5~4.0,3.2~5.0 4.0~6.3,5.0~8.0,6.3~10.0,8.0~12.5 10.0~16.0,12.5~20.0,16.0~25.0 |
| 3UA54 | 32 | 4.0~6.3,6.3~10.0,10.0~16.0,12.5~20.0 16.0~25.0,20.0~32.0,25.0~36.0 | |
| 3UA58 | 80 | 660 | 16.0~25.0,20.0~32.0,25.0~40.0,32.0~50.0 40.0~57.0.50.0~63.0.57.0~70.0.63.0~80.0 |
| 3UA59 | 63 | 660 | 0.1~0.16,0.16~0.25,0.25~0.4,0.4~0.63 0.63~1.0.0.8~1.25,1.0~1.6,1.25~2.0 1.6~2.5,2.0~3.2,2.5~4.0,3.2~5.0 4.0~6.3,5.0~8.0,6.3~10.0,8.0~12.5 16.0~16.0,12.5~20.0,16.0~25.0,20.0~32.0 25.0~40.0,32.0~45.0,40.0~57.0,50.0~63.0 |
| 3UA62 | 180 | 660 | 55.0~80.0,63.0~90.0,8o.0~110.0 90.0~120.0,110.0~135.0,120.0~150.0 135.0~160.0,150.0~180.0 |
| 3UA66 | 400 | 660 | 80.0~125.0,125.0~200.0 180.0~250.0,200.0~320.0 250.0~400.0 |
| 3UA68 | 630 | 660 | 320.0~500.0,400.0~630.0 |
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