Gmr32b Phase Controller Manual Jun 2026

Attach the resistive or inductive load to the output ports.

: Use a digital multimeter to verify that full line voltage is reaching terminals R, S, and T.

Prevents motors from running backward, which can cause immediate mechanical damage.

Available in variants ranging from 25A to 100A. gmr32b phase controller manual

Based on technical details and user feedback, here is a review of the product and its manual.

Phase-angle firing or zero-cross triggering (selectable via internal jumpers or software).

| Protection Type | Description & Action | | :--- | :--- | | | Triggers in ~2 seconds if any phase (L1, L2, L3) is missing, even if the motor is stationary. | | Phase Reversal | Detects and blocks incorrect phase sequence (L1-L2-L3) in ~2 seconds. | | Overvoltage | Typically triggers after 3-8 seconds; features adjustable thresholds (±15% adjustable) and hysteresis (e.g., 7V). | | Undervoltage | Typically triggers after 3-8 seconds; features adjustable thresholds (±15% adjustable) and hysteresis (e.g., 3-20VAC). | | Voltage Unbalance | Triggers if unbalance exceeds set thresholds (e.g., >10%), typically in 2-5 seconds. | | Phase Sequence Error | Prevents startup with wrong phase order; automatic reset when corrected. | | N-Phase Loss Protection | Advanced "Smart" variants specifically monitor neutral line integrity in four-wire systems. | Attach the resistive or inductive load to the output ports

This dial sets the percentage of voltage difference the unit will tolerate before tripping.

Connect the SPDT output relay terminals (typically designated as Terminals 4 and 5) directly in series with your motor contactor coil or Variable Frequency Drive (VFD) safety enable circuit. If a phase error trips the relay, this layout instantly breaks the control circuit loop, forcing the main power contactor open. Initial Startup & LED Verification Test

High reliability in preventing phase-related equipment damage. Available in variants ranging from 25A to 100A

Connect the positive loop wire to 4-20mA and negative to COM .

The specific documents cited in this manual are drawn from manufacturer information as well as platform documentation for the GMR-32B series. For further assistance, please contact your local authorized distributor.

: In many applications, once the power sequence or voltage returns to normal, the protector can automatically restore power, ensuring minimal downtime for home appliances. Technical Specifications According to listings on AliExpress , the GMR-32B typically features: Rated Voltage : 380V AC. Operating Range : 300–400V at 50/60Hz. Contact Form