The GMR-32B is a three-phase voltage and phase-sequence protection relay designed to protect industrial equipment like motors, compressors, and pumps from electrical faults. It monitors the power supply in real-time to detect issues such as phase reversal, phase loss, and voltage imbalances. Core Specifications

Rated Voltage: 380 VAC (operates up to 500V or 460V depending on the model variation).

Contact Form: Two normally open (NO) and two normally closed (NC) contacts, which are electrically inseparable. Contact Capacity: 250 VAC @ 6A or 30 VDC @ 3A.

Operating Conditions: Works in temperatures from -10°C to +55°C and relative humidity of 45%–85%.

Dimensions: Approximately 79 x 23 x 79 mm; weight is about 150g. Protection Features

The device uses five built-in indicators to signal specific faults: Normal: System is operating within safe parameters.

Phase Loss: Detects a missing phase or severe voltage imbalance.

Reverse Phase: Prevents equipment damage by detecting incorrect rotation/sequence.

Overvoltage / Undervoltage: Trips when voltage exceeds or falls below safe thresholds. Installation & Wiring

The GMR-32B (often branded under COCIS or Jiefeng) is a three-phase power supply protection relay designed to safeguard industrial equipment like motors, air compressors, and elevators from electrical faults. Key Functions & Protection Features

Phase Sequence/Reverse Protection: Automatically trips if the phase order (L1, L2, L3 or R, S, T) is incorrect, preventing motors from running in reverse.

Phase Loss Protection: Detects both static (before start) and dynamic (during operation) phase breakage.

Voltage Monitoring: Protects against over-voltage and under-voltage conditions beyond set limits.

Voltage Imbalance: Monitors for significant differences between the three phases. Technical Specifications Rated Voltage 380VAC (Standard) or up to 690V depending on model Frequency Contact Capacity 250VAC 6A (AC15) / 30VDC 3A (DC13) Power Consumption Installation 35mm DIN rail mount or screw mounting Operating Temp -10°C to +55°C Installation Guide

Safety First: Disconnect all power and follow lockout/tagout procedures before beginning installation.

Mounting: Secure the relay onto a standard 35mm DIN rail or use the M4 screw holes.

Input Wiring: Connect the incoming three-phase lines to the L1, L2, and L3 (or R, S, T) terminals. The unit is passive and draws power directly from these lines.

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

Testing: Restore power. A stable status light indicates correct phase sequence. Simulate a phase error (if safe) to verify the relay trips as expected.

Note: Do not install this unit on the output side of a variable frequency drive (VFD); it must be sampled from the main power supply side.

GMR-32B Phase Controller (or Phase Sequence Relay) is an industrial protective device designed to monitor three-phase power supplies and safeguard equipment like motors and air compressors from electrical faults. Key Features & Functions Comprehensive Fault Detection : Monitors and protects against: Phase Loss : Detects if any of the three phases (R, S, T) are missing. Phase Reversal/Sequence

: Ensures correct rotational direction of motors by detecting incorrect phase order. Voltage Anomalies : Provides overvoltage undervoltage protection. Voltage Imbalance : Identifies asymmetrical three-phase voltage conditions. Plug-and-Play Design

: Unlike other brands, it is designed for quick, calibration-free installation. Visual Status Indicators : Features 5 LED indicators

to signal status: Normal, Phase Loss, Reverse Phase, Overvoltage, and Undervoltage. Wide Application Range

: Ideal for air compressors, central air conditioners, cranes, pumps, elevators, and distribution boxes. Mounting Flexibility : Supports standard HT35 DIN rail mounting or direct screw-on installation. Technical Specifications

COCIS phase sequence relay GMR-32B 6060009 three ... - AliExpress

is a three-phase sequence monitoring relay (also commonly called a phase controller or protector) used to safeguard industrial equipment like motors, compressors, and pumps from power supply faults. It is widely used in central air conditioning units, elevators, and distribution boxes to prevent damage from phase reversal or voltage imbalances. AliExpress Key Technical Specifications

The GMR-32B is designed for high-reliability industrial monitoring with the following typical parameters: Operating Voltage: Commonly rated for

(ranges include 220V to 460V depending on the specific model). Frequency: Compatible with power systems. Contact Capacity: Typically rated at DIN rail (HT35) or screw mounting. Indicators: Features 5 LED indicators to signal status:

Normal, Phase Loss, Reverse Phase, Overvoltage, and Undervoltage Installation & Wiring Guide Follow these steps for a safe installation based on the manual and technical guides Safety First: Ensure all power is disconnected before beginning.

Secure the relay on a standard DIN rail within an enclosed control panel to avoid vibration. Main Circuit Wiring (Input): Connect the three-phase power lines ( L1, L2, L3 ) to the input terminals.

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

Wire the relay’s output terminals (typically two normally open/closed pairs) to the contactor coil or motor starter circuit.

This ensures that if a fault is detected, the relay will immediately trip the contactor and cut power to the equipment.

install the GMR-32B on the output side of a variable frequency drive (VFD); it must be installed on the supply side. Troubleshooting with LED Indicators

The front panel provides immediate diagnostics for system health:

The system is in the correct phase sequence and within voltage tolerances. Reverse Phase:

Two phases are swapped. You must swap any two of the L1, L2, or L3 input wires to fix the sequence. Phase Loss / Unbalance:

One phase is missing or there is a significant voltage difference between phases. Over/Undervoltage:

The incoming voltage has exceeded or dropped below the safe threshold (e.g., ±15% for smart models). AliExpress wiring diagram for your motor type or information on where to a replacement unit?

9. Conclusion

The GMR-32B Phase Controller is a robust unit essential for reliable backup power systems. Correct configuration of the AMF logic and safety thresholds is vital to prevent equipment damage. Users are advised to refer to the specific wiring diagram provided inside the controller lid during installation.

is a three-phase monitoring relay (often referred to as a phase sequence protector or phase controller) designed to protect industrial equipment like air compressors, pumps, and central air conditioning units. Amazon.com.be 1. Key Technical Specifications Operating Voltage: 380 VAC (typically supports ranges up to 460V). Contact Form: 2 Normally Open (NO) and 2 Normally Closed (NC) contacts. Connection Capacity: 250 VAC 6A / 30 VDC 3A. Power Consumption: ≤ 10 VA. Installation: Standard DIN rail mounting (Plug-and-play design). 2. Core Protection Functions

This device monitors the three-phase power supply for four critical fault conditions: Phase Sequence (Rotation): Ensures the motor rotates in the correct direction. Phase Loss (Failure): Detects if one of the three phases is missing. Overvoltage: Protects against surges that could burn out motor windings. Undervoltage:

Prevents damage caused by low voltage which increases heat and current draw. 3. Basic Wiring & Operation

While you should always consult the specific physical manual included with your unit, general wiring follows this pattern: L1, L2, L3: Connect these terminals to the three incoming power phases. Relay Contacts:

The NO/NC contacts are typically wired into the control circuit of your motor's magnetic contactor. If a fault is detected (e.g., phases are swapped), the relay will trip, opening the contactor and stopping the motor. Status Indicators:

LED lights on the faceplate usually indicate "Power" (Green) and "Fault" (Red). 4. Troubleshooting Common Faults Fault Light on Startup:

This usually indicates the phase sequence is incorrect. Power down and swap any two of the three input wires (L1/L2/L3) to correct the rotation. Relay Not Engaging:

Check for undervoltage or a missing phase using a multimeter. Ensure the input voltage matches the 380V rating of the

For more detailed technical data or specific installation diagrams, you can refer to the GMR-32B Series Manual on ManualLib wiring diagram

for a specific application, such as an air compressor or water pump?

The GMR-32B Phase Controller (also known as a phase monitoring or sequence relay) is a protection device for three-phase systems. It is primarily used to detect faults such as overvoltage, undervoltage, phase loss, and incorrect phase sequence.

Below is the technical data and operating guide synthesized from the available product documentation. Technical Specifications Feature Rated Voltage 380VAC (Range up to 460V or 500V depending on manufacturer) Main Functions

Phase loss, reverse phase, overvoltage, undervoltage, unbalance protection Contact Form 2 NO (Normally Open) + 2 NC (Normally Closed) Contact Capacity 250VAC 6A, 30VDC 3A Dimensions 79 x 23 x 79 mm Power Consumption ≤is less than or equal to 10 VA Installation Side

Power side of three-phase network (Do not install on VFD output) Indicator Status Guide

The controller typically features 5 LED indicators to diagnose the power status:

Normal: Power is within safe parameters and phase sequence is correct. Phase Loss: One or more phases are missing.

Reverse Phase: The phase sequence is incorrect (swapped phases). Overvoltage: Input voltage exceeds the safety threshold. Undervoltage: Input voltage is below the safety threshold. Installation & Wiring Mounting: The unit is standard DIN-rail mountable.

Input Connection: Connect the three phases (L1, L2, L3) to the input terminals. Wiring Material: Use insulated copper wire (

). Single-strand wire can be inserted directly; multi-strand wire requires pin terminals for reliability.

Application Note: Always install on the line/supply side. Placing the relay on the output side of a variable frequency drive (VFD) will cause it to malfunction. Reference Manual

For the original full-text PDF document, you can view the GMR-32B Series Protection Relay Data Sheet or access the GMR-32B Manual Library for additional versions.

Are you troubleshooting a specific error light or looking for wiring diagrams for a particular motor type?

Direct Answer The GMR-32B Phase Controller (also known as the GMR-32B Phase Sequence Relay) is an essential industrial protection device designed to monitor three-phase electrical systems and prevent catastrophic motor or equipment failure due to voltage and phase anomalies. Technical Specifications Overview

Understanding the core ratings is critical for safe integration.

Rated Operating Voltage: 380VAC (suitable for systems up to 460V, 50/60Hz). Power Consumption: ≤ 10 VA.

Contact Output Form: Two normally open (NO) and two normally closed (NC) contacts, electrically inseparable. Contact Capacity: 250VAC at 6A (Resistive) / 30VDC at 3A. Conventional Heating Current: 8A.

Mounting Standards: Standard HT35 DIN rail mount or direct mounting via two M4 screw holes. Operating Ambient Temperature: -10°C to +55°C. Relative Humidity: 45% to 85% RH.

Physical Dimensions: 79 x 23 x 79 mm (3.11 x 0.91 x 3.11 inches). Key Protective Functions

The GMR-32B manual outlines five distinct failure states that the device detects. The unit features built-in LED indicator lights to instantly alert technicians to specific electrical faults. 1. Phase Reversal Protection

If the phase sequence (R, S, T) is wired incorrectly during setup, the relay prevents the system from starting. This is vital for equipment like pumps or compressors where running backward causes immediate mechanical destruction. 2. Dynamic and Static Phase Loss Protection

The device reacts instantly if any single phase is dropped, whether while the motor is running (dynamic) or completely at a standstill (static). 3. Overvoltage Protection

An internal threshold monitors the upper limits of your standard voltage. If the input power exceeds safe parameters, the overvoltage indicator illuminates and the relay trips. 4. Undervoltage Protection

Operating a three-phase motor on low voltage causes high current draw, resulting in insulation breakdown. The GMR-32B trips the circuit when the supply falls below the specified threshold. 5. Three-Phase Voltage Imbalance

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

Follow these sequential steps for basic control panel installation based on standard operating manuals. 🛠️ Step 1: Mounting Push the device onto a standard HT35 DIN rail.

Alternatively, use the slide-out accessories at the bottom of the device to secure it directly to the backplate using two M4 screws. ⚡ Step 2: Main Circuit Connections

Route your raw three-phase power lines (L1, L2, L3 or R, S, T) directly to the sample input terminals on the controller.

Use insulated copper wire sized between 1.0 mm² and 2.5 mm².

Crucial Rule: Always wire the GMR-32B on the line side (power source side) of the network. Do not install it on the load output side of a Variable Frequency Drive (VFD). 🎛️ Step 3: Control Circuit Integration

Wire the internal relay output contacts in series with your master contactor's control coil.

If all three phases are normal and sequenced properly, the "Normal" LED will light up, and the contacts will allow current to energize the motor starter or contractor. Industry Applications

Because of its compact size and high reliability, you will commonly find the GMR-32B integrated into the following environments:

Central Air Conditioning: Protecting massive scroll compressors from reverse rotation.

Water and Oil Pumps: Preventing dry running and reverse rotation.

Industrial Cranes: Ensuring safe and predictable motor operations.

Power Distribution Cabinets: Monitoring overall line health before branching power to sub-systems.

The GMR-32B (often referred to as the COCIS or 3-Phase Monitoring Relay) is an industrial protection device designed to safeguard three-phase motors and equipment from power supply issues.

Below is a summary of the technical specifications and operational functions typically found in its manual: Device Specifications Rated Voltage: 380VAC.

Protection Functions: Detects phase sequence errors (incorrect rotation), phase loss, overvoltage, and undervoltage.

Contact Configuration: Typically features SPDT (Single Pole Double Throw) relay outputs with ratings of roughly 5A at 250VAC for resistive loads.

Operating Temperature: Generally rated for environments between -10°C and +55°C. Dimensions: Approximately Key Operational Features

Plug-and-Play Installation: Unlike complex controllers that require extensive calibration, the GMR-32B is designed for rapid deployment by technicians.

Phase Sequence Protection: It prevents motor operation if phases are connected in the wrong order, which is critical for protecting expensive industrial machinery from running in reverse and causing damage.

Safety Interlock: The device utilizes a "Common" and "NO" (Normally Open) point for control wiring; if the power supply is correct, the relay completes the circuit to allow the motor contactor to operate. Wiring Summary

Power Inputs: Standard connections for R, Y, and B (or L1, L2, L3) phases.

Control Output: Integrated into the starter's control circuit (e.g., stop/start push buttons) so that any fault condition immediately trips the contactor and stops the motor.

For detailed installation diagrams and specific dip-switch settings for voltage thresholds, you can access the full manual through repositories like ManualLib.

Do you need help troubleshooting a specific fault code or a wiring diagram for a particular motor type?

COCIS phase sequence relay GMR-32B 6060009 three ... - AliExpress

(often identified by part number 6060009) is a specialized three-phase sequence and phase-failure monitoring relay designed to protect industrial equipment like motors from electrical faults. AliExpress Key Technical Specifications According to the GMR-32B Manual details , the device features: Operating Voltage : 380 VAC. Dimensions : A compact mm footprint. Contact Configuration

: Two normally open (NO) and two normally closed (NC) contacts, which are electrically inseparable. Contact Capacity Power Consumption : Efficient at is less than or equal to 10 Amazon.com.be Essential Usage & Installation Tips Ideal Placement : Always install the power supply side of a three-phase network. Critical Restriction

install this relay on the output side of variable frequency drives (VFDs) or frequency converters, as it can cause malfunction or damage. Operational Range : It is designed to work in temperatures ranging from negative 10 raised to the composed with power C positive 55 raised to the composed with power C with a relative humidity of Amazon.com.be Common Fault Indicators The relay typically uses LED indicators to show its status: Normal Operation

: A single "ON" LED indicates the phase sequence is correct and all phases are present. Trip State

: If the "ON" LED is lit along with other indicator LEDs (often marked R, L, or Y), it signals a phase sequence error phase failure

: If a sequence trip occurs, you must swap the position of two incoming phase lines to correct the sequence. or more details on how to troubleshoot specific motor issues using this relay?

GMR-32B Phase Sequence Protector (also categorized as a voltage monitoring relay) is a critical safety component used to safeguard three-phase equipment like motors, air compressors, and pumps.

Below is a detailed review based on its manual specifications and industrial performance data. Quick Verdict

The GMR-32B is a reliable, "set-it-and-forget-it" industrial relay. It excels at detecting phase-related faults before they cause permanent motor burnout, making it a cost-effective insurance policy for expensive machinery. Key Performance & Features Comprehensive Fault Detection

: The unit monitors five specific electrical issues: normal operation, phase loss (imbalance), reverse phase, overvoltage, and undervoltage. Industrial Versatility

: It is designed for standard AC 50/60Hz systems with rated voltages up to 460V, commonly used in 220V, 380V, and 440V environments. Robust Diagnostic Feedback

: It features an easy-to-read LED display system that indicates the exact status or fault type, allowing for rapid troubleshooting. Compact Installation : At roughly mm, it fits easily onto standard HT35 DIN rails or can be screw-mounted using M4 holes. Manual Highlights & Technical Specs Specification Rated Voltage is less than or equal to 460 VAC (suitable for 380V standard) Connection Wire Insulated copper wire (1.0~2.5mm) Mounting Options HT35 DIN rail or direct screw mounting Primary Use Cases Air compressors, oil pumps, cranes, and HVAC units Pros and Cons High Reliability

: Backed by detailed documentation and a proven track record in demanding industrial environments.

: Instantly trips the circuit during a phase reversal or voltage spike, preventing motor damage. Ease of Use

: Simple wiring terminals—though needle clips are recommended for the most secure connection. Wiring Precision

: Only one copper wire can be inserted per terminal; dual-wiring for jumping connections requires careful handling. Maintenance Needs

: In rare cases of unnecessary tripping, internal contacts may need cleaning with contact cleaner to remove oxidation. Where to Find More Info

For full wiring diagrams and detailed installation steps, you can access the GMR-32B Manual PDF . For purchasing or regional reviews, retailers like AliExpress provide extensive customer feedback. wiring diagram for a specific application, like a pump or an elevator?

The GMR-32B Phase Controller (also known as a Phase Sequence Relay or Protector) is an industrial safety device designed to monitor three-phase power systems. Its primary role is to protect motors and machinery from damage caused by electrical faults like phase reversal, loss, or voltage imbalances. Technical Specifications

The GMR-32B is engineered for standard industrial power environments with the following typical ratings: Rated Voltage: 380 VAC Operating Frequency: 50/60 Hz Protection Functions: Phase Sequence: Prevents reverse motor rotation.

Phase Loss: Detects when a phase is missing, preventing motor burnout.

Voltage Monitoring: Guards against overvoltage and undervoltage.

Output Form: Two normally open (NO) and two normally closed (NC) contacts. Contact Capacity: 250 VAC 6A or 30 VDC 3A. Dimensions: Approximately 79 x 23 x 79 mm. Mounting: Standard 35mm DIN rail (HT35) or screw mounting. Installation & Wiring

Proper installation is critical to ensure the protector functions correctly during a fault. 🔌 Wiring Steps

Input Terminals: Connect the three-phase power lines (L1, L2, L3) to the designated input terminals on the relay.

Phase Sequence: Ensure the phase sequence is wired correctly; the unit will not operate normally if the sequence is reversed.

Output Terminals: Wire the output side to your motor starter circuit or contactor coil.

Wire Type: Use stranded or solid wires between 0.25 to 1.5 mm² (AWG24 to AWG16). 💡 Visual Indicators The device typically features LEDs to signal status: PWR (Green): Indicates power supply is present. OUT (Yellow): Indicates the relay output is active.

Fault LEDs: Red indicators for "OVER" (overvoltage) and "UNDR" (undervoltage) conditions. Troubleshooting Guide

If the device trips or fails to operate, check the following common issues:

Loose Connections: The most frequent cause of "nuisance tripping." Ensure all terminals are tightened securely.

Voltage Drops: Verify input voltage with a multimeter. A phase loss is typically detected when voltage drops below 60% of the rated input.

Inoperative Relay: If the indicator is OFF, check the L1 and L2 inputs, as these often double as the internal power supply for the device.

Nuisance Tripping: Fluctuating voltage or oxidized internal contacts can cause false errors. Use contact cleaner if oxidation is suspected.

🚨 Safety Note: This product should be installed on the power side of the network. It must not be installed on the output side of a variable frequency drive (VFD). If you'd like, I can: Find retailers where you can purchase a replacement.

Search for a wiring diagram specific to a certain motor type.

Compare this to other phase protectors like the Omron or Schneider models. Let me know what additional details would be most helpful! Three-phase Voltage and Phase-sequence Phase-loss Relay

8. Maintenance & Safety Precautions

Regular Testing: Perform a manual start test weekly to ensure battery health and fuel readiness.
Battery Maintenance: The controller relies on DC power. Check battery terminals for corrosion monthly.
Safety Warning: Always isolate the mains supply and battery before performing any wiring work on the controller or the ATS.

4.1 Power Section

L1, L2, L3: Input three-phase supply (through circuit breaker).
U, V, W: Output to three-phase load (heater, motor, transformer).
Ground: Connect to terminal marked PE (Protective Earth).

Problem 4: Erratic Output or Flickering

Shield control wires from power cables.
Install a ferrite bead on input lines.
Ensure ground loop is not present.

GMR-32B Phase Controller Manual — Quick Guide & Tips

Missing Essentials

Mechanical dimensions of the heat sink and mounting hole pattern.
Minimum load current (important for very small loads).
CE/UL compliance notes – mentioned but no specific standard numbers.

Rear Panel Connectors

The rear panel features:

Power Connector: For connecting the device to a power source (typically 12V DC).
Reference Input: For connecting an external reference oscillator.

Setting Procedure:

Press and hold the Set button for 3 seconds to enter programming mode.
The screen will display the first parameter (e.g., Un).
Use the Up/Down arrows to adjust the value.
Press Set again to save and move to the next parameter.
After the last parameter, the device will automatically save and return to measurement mode.

Gmr-32b Phase Controller Manual !free!