3UA series thermal overload relay is suitable for using in power system with AC 50/60Hz, rated operation voltage up to 660V and 1000V, 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 -25Ûc to +55Ûc air temperature 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 IEC60947-5.

Specification

Type	Rated operating current (A)	Rated insulation voltage(V)	Current setting range(A)
3UA50	12.5	660	0.1~0.16,0.16~0.25,0.25~0.4,0.32~0.63,0.63~0.1 0.8~1.25,1~1.6,1.25~2,1.6~2.5,2~3.2,2.5~4 3.2~5,4~6.3,5~8,6.3~10,8~12.5
3UA52	25	660	0.1~0.16,0.16~0.25,0.25~0.4,0.4~0.63,1.63~1 0.8~1.25,1~1.6,1.25~2,1.6~2.5,2~3.2,2.5`4,3.2~5 4~6.3,5~8,6.3~10,8~12.5,10`16,12.5~20,16~25
3UA54	32	660	4~6.3,6.3~10,10~16,12.5~20,16~25,20~32
3UA54	80	1000	16~25,20~32,25~40,32~50 40~57,50~63,57~70,63~80
3UA59	63	660	0.1~0.16,0.16~0.25,0.25~0.4,0.4~0.63,1.63~1 0.8~1.25,1~1.6,1.25~2,1.6~2.5,2~3.2,2.5~4,3.2~5 4~6.3,5~8,6.3~10,8~12.5,10~16,12.5~20,16~25 20~32,25~40,32~45,40~57,50~63
3UA59	180	660	55~80,63~90,80~110,90~120,110~135 120~150,135~160,150~180
3UA66	400	1000	80~125,125~200,180~250,200~320,250~400
3UA68	630	1000	320~500,400~630