Check if the relay is controlling a large contactor or motor directly.
Three-phase voltage and phase-sequence/phase-loss relay. Output: SPDT relay output (5A at 250 VAC / 30 VDC).
Loose wiring increases contact resistance, which produces localised joule heating at the screw terminals. This heat conducts into the GMR32B’s internal busbars and can cause the whole unit to feel excessively hot. Similarly, using undersized or low‑quality cables raises the circuit’s overall temperature. gmr32b phase controller manual hot
The most common cause of heat in industrial relays is high resistance due to loose wiring at the input (L1, L2, L3) or output terminals. High resistance generates heat that can eventually melt wire insulation or damage the relay housing. Phase Sequence Errors:
is . If the pilot duty circuit or direct motor load connected across the output relay exceeds this rating, the internal contacts will arc and overheat. 3. Chronic Overvoltage Conditions Check if the relay is controlling a large
The GMR32B should be installed on the supply side of the three-phase network, not on the output side of a variable frequency drive (VFD). Mounting: It mounts on a standard DIN rail.
Summary
Power up control circuit only (main contactor off). Fan should spin immediately. If not, check manual’s fan wiring diagram—often FAN+ and FAN- are separate terminals.
Wire the or Normally Closed (NC) contact series into your primary electromagnetic contactor coil loop. The most common cause of heat in industrial
Functionality & Performance