3UA68 Thermal Relay
1. Application
3UA thermal relay is suitable for using in power system with AC 50Hz, rate 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 overlapping 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 indications and free trip characteristics. The items conform to IEC60947-4.
Type:
3UA50 3UA52 3UA54 3UA55 3UA59 3UA58 3UA60 3UA61 3UA62 3UA66 3UA68
2, Specification
| Type | current (A) | insulation voltage (V) | Current setting range (A) |
| 3UA50 | 14.5 | 690 | 0.1~0.160.16~0.250.25~0.40.4~0.630.63~10.8~1.251~1.61.25~2
1.6~2.52~3.22.5~43.2~54~6.35~86.3~108~12.510~14.5 |
| 3UA52 | 25 | 690 | 0.1~0.160.16~0.250.25~0.40.4~0.630.63~10.8~1.251~1.61.25~2
1.6~2.52~3.22.5~43.2~54~6.35~86.3~108~12.5 10~1612.5~2016~25 |
| 3UA54 | 36 | 690 | 4~6.36.3~1010~1612.5~2016~25 20~3225~36 |
| 3UA55 | 45 | 690 | 0.1~0.160.16~0.250.25~0.40.4~0.630.63~10.8~1.251~1.6
1.25~2 1.6~2.52~3.22.5~43.2~54~6.35~8 6.3~108~12.510-16,16~2520~3225-36,32-40,36-45, |
| 3UA58 | 88 | 690 | 4~6.312.5~2016~2520~3225~40 32~5057~7063~8070~88 |
| 3UA62 | 180 | 1000 | 55~8063~9080~11090~120 110~135120~150135~160150~180 |
| 3UA66 | 400 | 1000 | 80~125125~200160~250200~320250~400 |
| 3UA68 | 630 | 1000 | 320~500400~630 |
