The (also known as a Phase Sequence Protector) is a critical safety component for industrial equipment. Whether you are running a central air conditioner, an elevator, or a large motor, this device ensures your power supply is stable and correctly phased to prevent catastrophic equipment failure. Key Specifications Rated Voltage: Typically 380VAC .
Always install the GMR-32B on the power supply side . Never install it on the output side of a variable frequency drive (VFD/inverter), as this will damage the unit. Troubleshooting "Hot" Issues & Nuisance Tripping
: Prevents equipment from starting if the phase sequence is incorrect.
If a red light triggers immediately on a brand-new installation, safely isolate the grid power. Swap any two incoming feeder lines (e.g., switch the connections on L1 and L2) to correct an improper phase sequence. gmr32b phase controller manual hot
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-10°C up to +55°C operational range
The COCIS GMR-32B Phase sequence relay handles multiple fault conditions simultaneously without relying on the size or nature of the load current. Feature / Attribute Technical Specification 380VAC (Compatible with systems up to 690V and below) Operating Frequency 50 / 60 Hz Contact Configuration 2 NO (Normally Open) + 2 NC (Normally Closed) Contact Load Capacity 250VAC @ 6A / 30VDC @ 3A Conventional Heating Current Power Consumption ≤is less than or equal to Standard Temperature Range -10°C to +55°C (Smart Series handles higher thresholds) Mounting Options Standard 35mm DIN Rail (HT35) or direct M4 screw mount Core Protective Functions & LED Indicators The front panel of the Go to product viewer dialog for this item. The (also known as a Phase Sequence Protector)
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It ensures electrical phases are in the correct A-B-C order. If phases are reversed, it cuts power to prevent motors from running backward, which can cause severe mechanical damage. Voltage Monitoring:
Most units include diagnostic lights; a "Normal" green light indicates correct phase sequence and voltage, while a red light indicates a fault (e.g., phase reversal or loss). Always install the GMR-32B on the power supply side
If the control panel lacks proper ventilation.
: Route the output control contacts (such as Terminals 4 and 5) in series with your main contactor coil or the digital enable input of a VFD. This guarantees that if a fault condition occurs, the relay opens the contactor coil path, dropping power to the motor instantly. Diagnostic LED Indicators & Troubleshooting