The device uses five LED indicators to signal real-time status and specific electrical errors:
Monitors the voltage levels to prevent operation under harmful conditions.
Optimized for higher fluctuations, reducing downtime in environments with unstable grid power.
Real-time monitoring of power phase sequence. It automatically cuts power if a phase sequence error is detected to prevent motor burn-out. Applications:
| Terminal Block | Signal | Notes | |----------------|------------------|--------------------------------| | L1, L2, L3 | 3-phase input | 230V or 400V depending on model | | T1, T2, T3 | Load output | Connect to heater / load | | A1, A2 | Aux supply | 220V AC (check manual) | | 4-20mA IN + / - | Analog setpoint | 0–10V or 4–20mA selectable | | COM, NO, NC | Alarm relay | Fault output | gmr32b+phase+controller+manual+patched
Protects against power surges or drops that exceed the equipment's rated limits (often 460V or less). Technical Specifications & Installation
on ManualLib, which includes PDF diagrams and full operational instructions. Parts & Identification: The unit is also associated with Part Number in industrial catalogs like AliExpress Jiefeng Escalator Parts Note on "Patched" Manuals:
The GMR-32B protects three-phase machinery by acting as an automated circuit isolator. The patched manual highlights five core anomalies that trigger a protective shutdown:
COCIS phase sequence relay GMR-32B 6060009 three ... - AliExpress The device uses five LED indicators to signal
Shuts down equipment if one of the three phases (R, S, T) fails, preventing motor burnout.
The is a three-phase monitoring relay used to protect electrical systems and motors from common power supply faults. It is frequently found on industrial e-commerce platforms like Alibaba and Amazon , often branded by manufacturers like COCIS or Schneider Electric. Core Functions
The corrects these errors and adds a firmware re-flash procedure for units manufactured before June 2022.
Inspect for internal contact contamination or wear . It automatically cuts power if a phase sequence
: A newer GMR-32B_Smart version is available, specifically built for harsher environments with high humidity or harmonics. Sourcing Information
Install high-speed semiconductor fuses (I²t rated) matching the max current of your specific GMR32B+ variant to protect the internal SCRs.
The GMR32B has two hidden trimpots (VR1 and VR2). The original manual claimed VR1 is "unbalance threshold" and VR2 is "trip delay".
Connect the relay output (SPDT contacts) to the motor contactor coil.
Standard phase controllers output power exponentially relative to the phase angle. The patch introduces a true linear power output scaling option (toggleable via parameter P-15 ).