Gmr-32b Phase Controller Manual [repack]

Connect the output control terminals (typically NO/NC/COM ) to the coil of your motor contactor or control circuit.

The GMR-32B (often branded as COCIS or SICCOS) is a specialized 380V AC three-phase protection relay designed for industrial applications to guard against phase reversal, loss, and voltage imbalances. Featuring DIN rail mounting and two NO/NC contacts, it is commonly utilized to protect HVAC and elevator systems from motor damage. For technical documentation, review the files hosted by JIEFENG and ManualLib .

The GMR-32B features separate blocks for high-voltage power connections and low-voltage control signals. Power Terminal Block (Heavy-Gauge Screw Terminals) Incoming AC hot line.

Detects when a phase is missing, preventing motor burnout. gmr-32b phase controller manual

| Indicator Label | LED Color | Indicated Status / Meaning | | :--- | :--- | :--- | | | Green | Normal: Power is ON, phase sequence is correct, and all monitored parameters are within acceptable limits. The output relay should be energized, allowing the equipment to start. | | 缺相 / Imbalance | Yellow (or Red) | Phase Loss or Severe Imbalance: One of the three phases (L1, L2, L3) is missing or the voltage imbalance is too high. The relay will de-energize to protect the load from overheating or single-phasing. | | 逆相 / Reverse Phase | Red | Incorrect Phase Sequence: The L1, L2, L3 connections are in the wrong order. To correct this fault, swap any two of the three-phase power leads at the controller's input terminals. | | 过压 / Over Voltage | Yellow | Over-Voltage: The supply voltage has risen above the set protection threshold for over 7 seconds (approx.). The relay will trip to protect the equipment from over-voltage stress. | | 欠压 / Under Voltage | Yellow | Under-Voltage: The supply voltage has dropped below the set protection threshold for over 7 seconds (approx.). The relay will trip to prevent the motor from drawing excessive current. |

Significant differences in voltage between the phases create excessive heat in motor windings. The device calculates this asymmetry and safely disengages the system. Installation & Wiring Guide

Understanding the specifications is crucial for proper application. The GMR-32B is designed for compact installation in control panels. GMR-32B series Connect the output control terminals (typically NO/NC/COM )

Protecting massive scroll compressors from reverse rotation.

Use insulated copper wire (1.0~2.5mm²). Ensure the wire is inserted fully (8mm depth) to maintain dielectric strength. Control Circuit Wiring (Output):

Solution: Check main line fuses, circuit breakers, and incoming line voltage at L1 and L2. For technical documentation, review the files hosted by

Complete Technical Manual and Calibration Guide for the GMR-32B Phase Controller

: Check the tightness of all electrical connections, as thermal cycling can cause screws to loosen over time.

Common ground reference for control signals.

Verify that the cooling fins run vertically to optimize natural airflow.