Switching Devices for Load Feeders
Overload Relays

3UA overload relays

Description

3UA Series Overload Relays are suitable for overload and phase - failure protection of AC motors with frequency of 50/60Hz, voltage up to 690 ~
1000V, current up to 0.1 ~ 400A under 8 - hours duty or uninterrupted duty. The relays are also suitable for overload protection of DC magnet
and DC motors.
The relays comply with IEC947-4, VDE0660 and GB14048. Several functions provided by these relays are: phase-failure protection, temperature
compensation, ON/OFF indication and manual/automatic reset. The relays can be mounted onto contactors or installed as single units.

Operating Conditions

● The altitude of the site of installation does not exceed 2000 meters above sea levels.
● The ambient air temperature: -25 ~ +55°C
● Relative humidity does not exceed 90% at +25°C

Features

● 3UA series are bimetal thermal relays with release class 10A.
● With differential phase- failure protection
● With continuous current adjusting scale
● With temperature compensation
● With ON/OFF indicator
● With TEST(OFF) button
● With Manual/Auto reset button
● With Auxiliary contacts 1 NO +1 NC insulated each other
● SIGUT - Siemens patent terminal, ensures easy and reliable connection, strong shock resistance and perfect safety protection.
● Mounting: plug in connection with contactor or install as a single unit.