3UA thermal overload relay

3UA thermal overload relay

3UA thermal overload relay can be used with 3TF/3TB contactor,also can be installed as single unit.

3UA thermal relay series are suitable for overload and phase-failure protection of ACmotors with frequency of 50/60Hz,voltage up to 690-1000V,current up to 0.1-630A under 8-hours duty or uninterrupted duty. 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 overleapping arrangement, for easy selecting by the customers from -25 to +55 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.

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	0.1~0.16,0.16~0.25,0.25~0.4,0.32~0.63,1.63~1,0.8~1.25,1~1.6,1.25~2,1.6~2.5,2~3.2,2.5~4,3.2~5,4~6.3,5~8,6.3~10,8~12.5,10~16,12.5~20,16~25
3UA54	32	660	4~6.3,6.3~10,10~16,12.5~20,16~25,20~32
3UA58	80	660	16~25,20~32,25~40,32~50,40~57,50~63,57~70,63~80
3UA59	63	660	0.1~0.16,0.16~0.25,0.25~0.4,0.32~0.63,0.63~0.1,0.8~1.25,1~1.6,1.25~2,1.6~2.5,2~3.2,2.5~4,3.2~5,4~6.3,5~8,6.3~10,8~12.5,10~16,12.5~20,16~25,20~32,25~40,32~45,40~57,50~63
3UA62	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

3UA thermal overload relay