A wide range of bimetal thermal overload relays are offered for close protection of motors & other inductive loads against overload, single phasing & unbalanced system voltages.
Thermal Overload Relays are ambient temperature compensated and are independent of variation in ambient temperature. Protection against single phasing & unbalanced voltages has been provided by means of differential tripping mechanism which ensures positive protection of motors / loads. They are provided with 1NO + 1NC potentially free contacts which can be used for signaling. The relay can be used in either Auto or Manual reset mode.
Standards: IS/IEC 60947-4-1
Auto Manual Reset Thermal Overload Relay (RT2)
A relay in which control of an operation is with or without human intervention in response to the occurrence of pre-determined condition is said to be an Auto – manual reset thermal overload relay.
Manual Reset Thermal Overload Relay (RT1)
A relay in which control of an operation is by human intervention is said to be Manual reset thermal overload relay.