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.
- Modular component for monitoring motor overload up to 37 kW/50 hp at 400/480 V
- The electronic relay is not affected by fluctuations in the ambient temperature
- Large cable dia. range of the main terminals
- Trigger class E5, E10, E20 and E30 can be selected via type code
- Integrated earth fault protection
- Wide adjustment range of the overload release from 20 to 80 A
- Integrated reset button and electronic reset via 24 V DC actuation
