Description
The Trane RLY03157 Thermal Overload Relay / Motor Starter is a current-sensing protection unit used to manage motor load conditions and interrupt the circuit during abnormal current rise. It operates through thermal response elements that react to sustained overcurrent, causing the internal mechanism to open the control path and stop motor operation when limits are exceeded. The system is factory-calibrated for the 12 to 18 amp range to match compatible motor loads and starter assemblies. Installed in compressor and blower control circuits in HVAC systems, it works as a motor protection component that supports controlled electrical operation and prevents excessive current flow to connected equipment.
