9065CT9701R03/21

Ambient-Temperature Compensated Bimetallic Overload Relays

Ambient-compensated bimetallic overload relays are designed for one particular situation: that is, when the motor is at a constant ambient temperature, but the controller is located separately in a varying ambient temperature. In this case, if a standard thermal overload relay were used, it would not trip at the same level of motor current if the controller temperature changed.

The standard thermal overload relay is always affected by the surrounding temperature. To compensate for temperature variations, an ambient-compensated overload relay is used. Its trip point is not affected by temperature, and it performs consistently at the same value of current.

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