Kromschroder Servomotor 88300068

The Kromschroder IC20-30W3TR10 (88300068) is a servomotor designed for precise rotary movement from 0 to 90 degrees. It operates on a 230 V supply at 50–60 Hz, with a torque of 3 Nm and a duty cycle of 100%. The actuator features voltage-free limit switches and a feedback potentiometer rated at 0.5 W. It is intended for adjusting gas and air volumes in combustion systems, compatible with butterfly valves for control ratios up to 10:1 and with linear flow control VFC (IFC) for ratios up to 25:1. The unit complies with safety standard DIN EN 60730-1 and directives 2014/35/EU and 2014/30/EU.

When selecting a replacement actuator of this type, verify the supply voltage, frequency, torque, and control signal compatibility (e.g., three-point step control). Ensure the mounting dimensions and shaft coupling match the existing valve or damper. Check the cable cross-section and line entrance specifications to confirm electrical connections are feasible. The actuator's holding torque should equal the required torque for the application.

Common failures include loss of rotation due to worn gears or motor failure, often indicated by the actuator not moving or stalling. Electrical issues may cause erratic movement or failure to hold position when power is disconnected. Check for condensation or moisture ingress, which can damage internal components. Verify that limit switches and feedback potentiometer are functioning correctly, as these can cause incorrect positioning or signal errors.