VR27 thermal relay is suitable for overload protection of AC motor operated on 8-hours duty or
uninterupted duty. The overlaod protected AC motor with frequency 50Hz, voltage up to 660V,
current up to 38A. Several functions provided by these relays are: phase-failure protection
temperature compenstaion. The product conforms to IEC60947-4-1 stardand.

 
● The altitude couldn t exceed 2000m.
● Ambient temperature: -5 ~+55 and the average temperature no more than +35 in 24
hours.
● Atmosphere: Comparative humidity no more than 50% at max +40 , and it may be higher at a lower temperature. The lowest average temperature no more than +20 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 5o.
● 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.