Safeguards against voltage spikes or drops beyond safe limits.
: Series-wire these into your master control contactor coil line. When the incoming utility power is healthy, the GMR-32B closes these contacts, allowing the machine to start. gmr32b phase controller manual
Voltage that is too high can over-excite motor coils, leading to increased current and overheating. Voltage that is too low causes a motor to draw excessive current to maintain torque, also leading to overheating. The GMR-32B monitors RMS voltage and, if it exceeds the set tolerance (typically ±15% of rated voltage), it trips the output after a short delay (3-8 seconds). This delay prevents nuisance tripping from minor, momentary voltage fluctuations. Safeguards against voltage spikes or drops beyond safe
: Shuts down the system if one of the three phases is lost to prevent "single-phasing," which can burn out motors. Voltage that is too high can over-excite motor
): Connect the three incoming phases to the labeled input terminals.
Never disassemble or modify the housing components of the GMR-32B protector. Doing so invalidates manufacturing safety guarantees and introduces an immediate arc flash risk.