⚠️ Never install the phase controller on the output side of a Variable Frequency Drive (VFD) or inverter. High frequency harmonics generated by VFD outputs will destroy the internal electronics of the relay. Hardware Mounting Steps
The ALARM LED flashes 1 time after a cold start. This is normal until the unit warms up. If it persists >5 minutes, the thermistor is likely open circuit.
I can tailor a specific schematic configuration layout based on your setup. Share public link
If one phase goes down (e.g., due to a blown fuse), the GMR32B detects the loss of voltage on that leg, immediately de-energizes the relay, and cuts power to the motor starter. gmr32b phase controller manual
Below is a typical terminal assignment for a single-phase GMR32B. Always verify with the sticker on your specific unit.
This device is specifically designed to work on three-phase circuits, typically 380V, and is intended for installation on the output side of a variable frequency drive (VFD). The GMR32B directly samples the incoming three-phase supply.
Isolate source power, check torque on all R-S-T screw terminals, and look for wire oxidation. Tighten or strip and re-terminate frayed connections. 2. Failure to Trip During Known Phase Faults ⚠️ Never install the phase controller on the
: It is frequently integrated into control panels for motors, heavy machinery, and PLC (Programmable Logic Controller) modules to provide a robust layer of protection for expensive assets.
Re-energize the circuit. The , and the control relay must isolate the contactor coil to prove operational readiness. 6. Primary Industrial Applications
Generally supports wide range, often 200V - 480V AC (Verify on device) Phase Loss, Phase Sequence Reversal Indicator Light This is normal until the unit warms up
The device monitors the power supply in real-time and provides protection against five primary faults:
| Model / Variant Name | Key Feature / Difference | | :--- | :--- | | | Standard model. Basic 3-wire (no neutral) phase controller. | | GMR-32B+N | Specialized model for 3-phase, 4-wire (+ Neutral) systems, including Neutral Loss protection. | | GMR-YK-32B | Variant with extended functionality and remote control capability. | | GMR-32BT | Variant with timer functions for delayed start or reset, providing more flexible system integration. | | GMR-32BD | Variant with digital display of voltage values and other system parameters. | | Smart GMR-32B | Advanced variant designed for harsh environments, offering enhanced immunity to high-order harmonics and extreme temperatures. | | GMR-52B | Higher current capacity variant for larger load applications. |