8550 Overload relay
Modular component for monitoring motor overload up to 37 kW/50 hp at 400/480 V
The R. STAHL Series 8550 electronic overload relay is a component for monitoring the load current of motors. It reliably reports an overload and safely shuts off the motor using a contactor. Together with the moulded case circuit breaker in the same series which is also available, these three components form a motor starter which reliably controls powers up to 37 kW/50 hp at 400 or 480 V (other powers available on request). Earth fault protection is also integrated. This means that Ex d and Ex e motors are safely protected at all points. The broad adjustment range of the overload current optimises the variety of versions. Resetting in case of error is either done manually on the unit on-site via the integrated reset button, or electrically via the control system.
