Application

3UA series thermal overload relay are suitable for overload and phase-failure protection of AC

motors with frequency of 50/60Hz,voltage up to 690-1000V ,current up to 0.1-630A under 8-

hours duty or uninterrupted duty.

Functions provided by these relays, are phase-failure protection, temperature compensation, ON/OFF indication and manual/automatic reset.

Applicable Standards:National Standard: GB 14048, Intermational Standard: IEC 60947-4-1.

The relays can be mounted onto contactors or installed as single units.

Operating Conditions

The altitude couldn’t exceed 2000m.

Ambient temperature: -5 “C~+55C and the average temperature no more than +35C in 24 hours.

Atmosphere: Comparative humidity no more than 50% at max +40 C, and it may be higher at a

lower temperature. The lowest average temperature no more than +20C in the wettest month.

The maximum average comparative humidity of this month couldn’t exceed 90%, The change of temperature leading to dew on the product must be considered.

Class of pollution: Class 3.

The slope between installation surface and vertical surface couldn’t exceed±5°

Keeping away from explosive, corrosive and electric atomy.

Keeping dry.

The product should be used and installed at certain place without any shock, vibration etc.