The GMR32B has an internal power supply and relays that generate some heat.
Fault state. This warns of an active electrical problem, such as an inverted input sequence, line failure, or severe phase loss. The controller will open its safety contacts within 100 milliseconds to isolate downline hardware. 5. Troubleshooting & Handling Thermal ("Hot") Faults
DIN rail mount or screw mount inside the control panel. gmr32b phase controller manual hot
Phase angle control works by "chopping" the AC waveform, allowing only a portion of the electrical cycle to pass to the load. This switching process happens at high speeds, which naturally generates heat within the internal thyristors (SCRs). For a unit like the GMR32B, thermal management is not just a maintenance task—it is a requirement for operational safety. Technical Specifications: Temperature Limits
If your heatsink has an integrated fan, ensure it is spinning freely and not clogged with grime. The GMR32B has an internal power supply and
| Temperature Zone | Heat Level | Action Required | |----------------|-------------|------------------| | 30–50°C (86–122°F) | Warm to touch – normal | No action | | 50–70°C (122–158°F) | Hot but holdable for 5 seconds | Acceptable at max load. Check ventilation. | | 70–85°C (158–185°F) | Very hot, cannot hold finger | Reduce load or improve cooling immediately. | | >85°C (>185°F) | Critical – burning smell possible | Emergency shutdown – probable component damage. |
If you are experiencing overheating or "nuisance tripping," expert reviews and manuals suggest checking the following: The controller will open its safety contacts within
GMR-32B series 新 power supply 保护器 Manual | ManualLib
: Often features a 17.5 mm width to minimize space requirements in industrial control panels. Technical Specifications Voltage Range 300V - 400V AC (50/60Hz) Contact Rating Typically 5A at 250 VAC (Resistive Load) Operating Temperature -20°C to 60°C Indicator Lights PWR (Green), OUT (Yellow), Fault/Over (Red) Reset Method Automatic reset once fault is cleared Troubleshooting "Hot" or Overheating Issues