(Note: Always disconnect power before wiring. High voltage is present.)
If you are working with 3-phase motors, you know that protecting them from electrical faults is not optional—it is essential. The GMR32B Phase Controller (often labeled as a Motor Protection Relay) is a workhorse device designed to save your equipment from costly damage caused by phase loss, reversal, or imbalance.
But staring at the terminals and blinking lights without a clear plan can be frustrating. This guide breaks down the typical manual into plain English, helping you wire, set up, and troubleshoot your GMR32B unit quickly.
Below is a typical terminal assignment for a single-phase GMR32B. Always verify with the sticker on your specific unit.
| Terminal | Label | Function |
|----------|-------|-----------|
| 1 (L1) | LINE | AC line input (R phase) |
| 2 (T1) | LOAD | To load (heater, lamp, etc.) |
| 3 | COM | Common for control signal |
| 4 | IN+ | 4–20 mA or 0–10 V input (+) |
| 5 | ALM+ | Alarm relay NO (normally open) |
| 6 | ALM- | Alarm relay common |
| 7 | RST | Reset input (momentary to common) |
| 8 | +10V | 10 VDC reference for potentiometer |
| PE | Ground | Protective earth (chassis) |
The GMR32B is a single-phase or three-phase (depending on variant) solid-state power regulator. It uses thyristors (SCRs) or triacs to chop the AC sine wave, thereby varying the RMS voltage delivered to a load. Key specifications typically include:
The “GMR” series is known for its compact DIN-rail mountable chassis, LED status indicators, and optional alarm relay.
| Parameter | Value |
|-----------|-------|
| Operating Voltage | 200–480 VAC ±10% (50/60 Hz) |
| Rated Current | 32A (continuous, 40A for 10 sec) |
| Control Inputs | 0–10 VDC, 4–20 mA, Potentiometer (10kΩ) |
| Firing Modes | Phase angle, zero-cross burst, soft start |
| Protection | Overcurrent, SCR overtemperature, missing phase |
| Communication | RS-485 (Modbus RTU) optional |
Most phase controllers have a DIP switch or potentiometer settings for configuration:
Gmr32b Phase Controller Manual -
(Note: Always disconnect power before wiring. High voltage is present.)
If you are working with 3-phase motors, you know that protecting them from electrical faults is not optional—it is essential. The GMR32B Phase Controller (often labeled as a Motor Protection Relay) is a workhorse device designed to save your equipment from costly damage caused by phase loss, reversal, or imbalance.
But staring at the terminals and blinking lights without a clear plan can be frustrating. This guide breaks down the typical manual into plain English, helping you wire, set up, and troubleshoot your GMR32B unit quickly. gmr32b phase controller manual
Below is a typical terminal assignment for a single-phase GMR32B. Always verify with the sticker on your specific unit.
| Terminal | Label | Function |
|----------|-------|-----------|
| 1 (L1) | LINE | AC line input (R phase) |
| 2 (T1) | LOAD | To load (heater, lamp, etc.) |
| 3 | COM | Common for control signal |
| 4 | IN+ | 4–20 mA or 0–10 V input (+) |
| 5 | ALM+ | Alarm relay NO (normally open) |
| 6 | ALM- | Alarm relay common |
| 7 | RST | Reset input (momentary to common) |
| 8 | +10V | 10 VDC reference for potentiometer |
| PE | Ground | Protective earth (chassis) | (Note: Always disconnect power before wiring
The GMR32B is a single-phase or three-phase (depending on variant) solid-state power regulator. It uses thyristors (SCRs) or triacs to chop the AC sine wave, thereby varying the RMS voltage delivered to a load. Key specifications typically include:
The “GMR” series is known for its compact DIN-rail mountable chassis, LED status indicators, and optional alarm relay. Below is a typical terminal assignment for a
| Parameter | Value |
|-----------|-------|
| Operating Voltage | 200–480 VAC ±10% (50/60 Hz) |
| Rated Current | 32A (continuous, 40A for 10 sec) |
| Control Inputs | 0–10 VDC, 4–20 mA, Potentiometer (10kΩ) |
| Firing Modes | Phase angle, zero-cross burst, soft start |
| Protection | Overcurrent, SCR overtemperature, missing phase |
| Communication | RS-485 (Modbus RTU) optional |
Most phase controllers have a DIP switch or potentiometer settings for configuration: