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Combining digital monitoring with precise tripping mechanisms, this relay offers real-time diagnostics and customizable protection settings, ensuring optimal motor performance and longevity. Its compact design and user-friendly interface make it a versatile choice for industrial motor control systems.
Multi-Function Protection: Monitors current, voltage, and temperature, providing overload, phase failure, 堵转 (locked-rotor), and under-voltage protection.
Digital Display & Configuration: Features a backlit LCD for real-time parameter display and menu-driven programming via push buttons or remote software.
High Precision Sensing: Uses hall-effect sensors to measure current with ±1% accuracy, eliminating thermal drift and ensuring consistent protection.
Communication Capability: Built-in RS485 Modbus RTU interface enables remote monitoring and control, integrating seamlessly with PLCs and SCADA systems.
Energy-Saving Mode: Reduces coil power consumption by 50% during normal operation, complying with global energy efficiency standards.
The EOCR 3DE 3EZ is ideal for:
Motor Control Centers: Protects induction motors in pumps, fans, and compressors across manufacturing plants and water treatment facilities.
Industrial Automation: Integrates with PLC-controlled systems to provide real-time fault detection and prevent costly downtime.
HVAC Systems: Safeguards large motors in chillers and air handlers, ensuring reliable operation in commercial buildings.
Renewable Energy: Used in wind turbines and solar tracking systems to protect drive motors from voltage fluctuations and overloads.
Q: How many motor parameters can be monitored simultaneously?
A: The relay monitors up to 8 parameters, including three-phase current, voltage, power factor, and operating hours.
Q: Can it be configured for different motor types?
A: Yes, it supports induction motors, synchronous motors, and DC motors with adjustable settings for rated current and starting characteristics.
Q: What is the tripping response time for a short circuit?
A: It trips within 20ms for faults exceeding 6x the rated current, minimizing damage to the motor and system.
Q: Is there a built-in data logging function?
A: Basic models store the last 10 fault records, while advanced versions offer trend logging and event history for predictive maintenance.
EOCR-3DE | EOCR-3EZ | ||
Protective Item | Trip Time | Protective Item | Trip Time |
Over-current | O-TIME | Over-current | O-TIME |
under-current | 0.5~30sec | Under-current | 0.5~30sec |
Phase Loss | 3 sec | Phase Loss | 3 sec |
Phase Unbalance | 8 sec | Phase Unbalance | 8 sec |
Phase Reversal | 0.1~0.3 sec | Phase Reversal | 0.1~0.3 sec |
Locked Rotor | D-TIME | Locked Rotor | D-TIME |
- | - | Ground Fault | 0.05~10 sec |
Specification
Model | EOCR-3DE | EOCR-3EZ | |
Over Current Setting Range | Refer Table #1 | ||
Ground Fault Current Setting | - | 0.02 ~ 3A | |
Alert Setting | 50 ~ 100% / OFF | - | |
Start Delay Time Setting (D-TIME) | 1 ~ 200 Sec | ||
Trip Delay Time Setting (O-TIME) | INV | 1 ~ 30 | |
DEF | 0.2 ~ 30 Sec | ||
Control Voltage | 24VAC/DC, 110VAC±15%, 220VAC±15% | ||
Output Relay | OL | 2-SPST | 1-SPST |
AL/GR | AL Relay | Ground Fault Relay | |
Rating | 3A/250VAC Resistive | ||
Time Characteristic | In/”tc ”mode | Inverse (See Curve-1) | |
dE/”tc ”mode | Definite (See Curve-2) | ||
Troubleshooting / Trip Indication | LED Display (SSD+LED) | ||
Current Sensing | 3-CT | ||
Mounting | 35mm Din-rail | ||
Table #1. Current Range
Current Setting Range (Amps) | Number of Conductors thru CT windows | Extermal CT Ratio | Setting of CT Ratio | Remark |
0.5 ~ 60A | 1 | - | OFF(Mode : --) | Wide Range |
0.25 ~ 3.0A | 2 | - | 2t | |
0.1 ~ 1.2A | 5 | - | 5t | |
1 ~ 12A | 1 | 10 : 5 | 10 | |
1.5 ~ 18A | 1 | 15 : 5 | 15 | |
2.0 ~ 24A | 1 | 20 : 5 | 20 | |
2.5 ~ 30A | 1 | 25 : 5 | 25 | |
3.0 ~ 36A | 1 | 30 : 5 | 30 | |
4.0 ~ 48A | 1 | 40 : 5 | 40 | |
5 ~ 60A | 1 | 50 : 5 | 50 | |
6 ~ 72A | 1 | 60 : 5 | 60 | |
7.5 ~ 90A | 1 | 75 : 5 | 75 | |
10 ~ 120A | 1 | 100 : 5 | 100 | |
12 ~ 144A | 1 | 120 : 5 | 120 | |
15 ~ 180A | 1 | 150 : 5 | 150 | |
20 ~ 240A | 1 | 200 : 5 | 200 | |
25 ~ 300A | 1 | 250 : 5 | 250 | |
30 ~ 360A | 1 | 300 : 5 | 300 | |
40 ~ 480A | 1 | 400 : 5 | 400 | |
50 ~ 600A | 1 | 500 : 5 | 500 | |
60 ~ 720A | 1 | 600 : 5 | 600 | |
75 ~ 900A | 1 | 750 : 5 | 750 | |
80 ~ 960A | 1 | 800 : 5 | 800 |
Combining digital monitoring with precise tripping mechanisms, this relay offers real-time diagnostics and customizable protection settings, ensuring optimal motor performance and longevity. Its compact design and user-friendly interface make it a versatile choice for industrial motor control systems.
Multi-Function Protection: Monitors current, voltage, and temperature, providing overload, phase failure, 堵转 (locked-rotor), and under-voltage protection.
Digital Display & Configuration: Features a backlit LCD for real-time parameter display and menu-driven programming via push buttons or remote software.
High Precision Sensing: Uses hall-effect sensors to measure current with ±1% accuracy, eliminating thermal drift and ensuring consistent protection.
Communication Capability: Built-in RS485 Modbus RTU interface enables remote monitoring and control, integrating seamlessly with PLCs and SCADA systems.
Energy-Saving Mode: Reduces coil power consumption by 50% during normal operation, complying with global energy efficiency standards.
The EOCR 3DE 3EZ is ideal for:
Motor Control Centers: Protects induction motors in pumps, fans, and compressors across manufacturing plants and water treatment facilities.
Industrial Automation: Integrates with PLC-controlled systems to provide real-time fault detection and prevent costly downtime.
HVAC Systems: Safeguards large motors in chillers and air handlers, ensuring reliable operation in commercial buildings.
Renewable Energy: Used in wind turbines and solar tracking systems to protect drive motors from voltage fluctuations and overloads.
Q: How many motor parameters can be monitored simultaneously?
A: The relay monitors up to 8 parameters, including three-phase current, voltage, power factor, and operating hours.
Q: Can it be configured for different motor types?
A: Yes, it supports induction motors, synchronous motors, and DC motors with adjustable settings for rated current and starting characteristics.
Q: What is the tripping response time for a short circuit?
A: It trips within 20ms for faults exceeding 6x the rated current, minimizing damage to the motor and system.
Q: Is there a built-in data logging function?
A: Basic models store the last 10 fault records, while advanced versions offer trend logging and event history for predictive maintenance.
EOCR-3DE | EOCR-3EZ | ||
Protective Item | Trip Time | Protective Item | Trip Time |
Over-current | O-TIME | Over-current | O-TIME |
under-current | 0.5~30sec | Under-current | 0.5~30sec |
Phase Loss | 3 sec | Phase Loss | 3 sec |
Phase Unbalance | 8 sec | Phase Unbalance | 8 sec |
Phase Reversal | 0.1~0.3 sec | Phase Reversal | 0.1~0.3 sec |
Locked Rotor | D-TIME | Locked Rotor | D-TIME |
- | - | Ground Fault | 0.05~10 sec |
Specification
Model | EOCR-3DE | EOCR-3EZ | |
Over Current Setting Range | Refer Table #1 | ||
Ground Fault Current Setting | - | 0.02 ~ 3A | |
Alert Setting | 50 ~ 100% / OFF | - | |
Start Delay Time Setting (D-TIME) | 1 ~ 200 Sec | ||
Trip Delay Time Setting (O-TIME) | INV | 1 ~ 30 | |
DEF | 0.2 ~ 30 Sec | ||
Control Voltage | 24VAC/DC, 110VAC±15%, 220VAC±15% | ||
Output Relay | OL | 2-SPST | 1-SPST |
AL/GR | AL Relay | Ground Fault Relay | |
Rating | 3A/250VAC Resistive | ||
Time Characteristic | In/”tc ”mode | Inverse (See Curve-1) | |
dE/”tc ”mode | Definite (See Curve-2) | ||
Troubleshooting / Trip Indication | LED Display (SSD+LED) | ||
Current Sensing | 3-CT | ||
Mounting | 35mm Din-rail | ||
Table #1. Current Range
Current Setting Range (Amps) | Number of Conductors thru CT windows | Extermal CT Ratio | Setting of CT Ratio | Remark |
0.5 ~ 60A | 1 | - | OFF(Mode : --) | Wide Range |
0.25 ~ 3.0A | 2 | - | 2t | |
0.1 ~ 1.2A | 5 | - | 5t | |
1 ~ 12A | 1 | 10 : 5 | 10 | |
1.5 ~ 18A | 1 | 15 : 5 | 15 | |
2.0 ~ 24A | 1 | 20 : 5 | 20 | |
2.5 ~ 30A | 1 | 25 : 5 | 25 | |
3.0 ~ 36A | 1 | 30 : 5 | 30 | |
4.0 ~ 48A | 1 | 40 : 5 | 40 | |
5 ~ 60A | 1 | 50 : 5 | 50 | |
6 ~ 72A | 1 | 60 : 5 | 60 | |
7.5 ~ 90A | 1 | 75 : 5 | 75 | |
10 ~ 120A | 1 | 100 : 5 | 100 | |
12 ~ 144A | 1 | 120 : 5 | 120 | |
15 ~ 180A | 1 | 150 : 5 | 150 | |
20 ~ 240A | 1 | 200 : 5 | 200 | |
25 ~ 300A | 1 | 250 : 5 | 250 | |
30 ~ 360A | 1 | 300 : 5 | 300 | |
40 ~ 480A | 1 | 400 : 5 | 400 | |
50 ~ 600A | 1 | 500 : 5 | 500 | |
60 ~ 720A | 1 | 600 : 5 | 600 | |
75 ~ 900A | 1 | 750 : 5 | 750 | |
80 ~ 960A | 1 | 800 : 5 | 800 |
