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| EOCR-FE420 Overview ✔ Built-in MCU (Microcontroller Unit) ✔ Real-time processing / High precision ✔ Overcurrent protection range: 05: 0.5~7A, 80: 5-80A ✔ CT secondary side ratio setting: 1A/5A ✔ Output analog signal: 4~20mA ✔ Undercurrent protection range: Below overcurrent setting ✔ Operation time characteristics: Definite time / Inverse time ✔ Digital display screen ✔ Automatic three-phase current cyclic display: Digital ammeter (5-second interval for each phase) / Single-phase fixed management function through manual cycling ✔ Trip cause digital display: Simple fault, self-diagnosis function ✔ Final trip cause confirmation: Records the last three trip causes and allows confirmation of the curre nt at the time of tripping ✔ Can be confirmed even after power outage recovery ✔ Manual (instant) / Automatic reset ✔ Fault protection function (FS: ON) ✔ Self-diagnosis function: Relay energization and normal operation (selectable via setting) ✔ 35mm DIN rail mounting, suitable for various environments ✔ Suitable for variable frequency environments: 20~400Hz ✔ Selectable terminal type and through type | |
EOCRFE420-05DUH EOCRFE420-80DUH | ||
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EOCRFE420-05DUT EOCRFE420-80DUT | ||
EOCR-FE420 Protection Functions
✔ Overcurrent (Definite time: 0.5...30 seconds, Inverse time: 1...30 levels)
✔ Undercurrent (0.5...30 seconds)
✔ Phase loss (within 3 seconds)
✔ Reverse phase (0.1...0.3 seconds)
✔ Current imbalance (within 8 seconds)
✔ Locked rotor (after D-Time)
EOCR-FE420 Product Features
| Product Specifications |
| Product Range | EOCR |
| Product Name | EOCR-FE420 Electronic Overcurrent Relay |
| Protection Type | • Overload protection, set value (In > Overcurrent setting value) • Undercurrent protection, set value (In < Undercurrent setting value) • Running locked rotor protection, set value (In > 1.5...5 times the overcurrent setting value) • Phase loss protection • Reverse phase protection • Starting locked rotor protection, set value (In > 2...10 times the overcurrent setting value) • Imbalance protection (5...50%) • Current signal output: 4~20mA |
[Us] Rated Input Voltage | 100~240V AC / AC |
| Power Frequency | 50...60 Hz |
| Relay application | Motor protection |
| Protection Range | 05：0.5-7 A 80：5-80 A When used beyond the main body range with type 05 and 3CT, it can protect up to 960A |
| Mounting Method | 35mm DIN rail mounting or screw fixing |
| Electrical/Mechanical Characteristics |
Contact Type | • 1 NC + 1 NO (OL): One normally closed contact and one normally open contact for overload protection • 1 NO: One individual normally open contact |
[Ue] Rated Operational Voltage | 600 V AC 50...60 Hz Main Circuit Conforming to UL 690 V AC 50...60 Hz Main Circuit Conforming to CSA 690 V AC 50...60 Hz Main Circuit Conforming to IEC 60947-4-1 |
[UImp] Rated Impulse Withstand Voltage | 6 kV Conforming to IEC 60947-4-1 |
| Reset method | Manual reset / Electric reset / Automatic reset |
| Time Setting | Overcurrent operating time: 0.2...30 seconds (inverse time) |
| Display Type | Bar graph and 7-segment LED display |
| Power Consumption | 5 W |
[Ith] Continuous Current | 3 A control circuit |
| Permissible Current | 100...240 V，3 A |
| Wiring | Control circuit cable: 2 x 1...1.5 mm² flexible cable with terminals - M3 Control circuit cable: 2 x 1...1.5 mm² flexible cable without terminals |
| Tightening Torque | Control circuit 0.8...1.2 N·m suitable for 4.7 mm cabl |
| Dimensions and weight |
| type | Through bottm-hole type | Through screw-terminal type |
| Height | 56.3mm | 56.3 mm |
| Width | 70mm | 91.3 mm |
| Depth | 106 | 106 |
| Weight | 470g | 640g |
| Split cable(Cable-3M ) | 125g |
| Using Environment |
| Using Temperature | Matching IEC 60947-4-1, -20…60 °C |
| Storage Temperature | -40…85 °C |
| Using Altitude | 2000m |
| IP Rating | IIP20 conforming to IEC 60529 |
| Fire Resistance | 650°C, compliant with IEC 60695-2-12 standard |
| Shock Resistance | 15 gn 11 ms compliant with IEC 60068-2-7 |
| Vibration Resistance | 4 gn panel mounting in compliance with IEC 60068-2-6 2 gn 35mm DIN rail mounting in compliance with IEC 60068-2-6 |
| Surge Withstand | 6 kV compliant with IEC 61000-4-5 |
| Dielectric Strength | 2 kV 50...60 Hz between enclosure and circuit in compliance with IEC 60255-5 1 kV 50...60 Hz between contacts in compliance with IEC 60255-5 2 kV 50...60 Hz between internal circuits in compliance with IEC 60255-5 |
Electromagnetic Compatibility | - Radiated RF immunity 10 V/m level 3 in accordance with IEC 61000-4-3 - Electrostatic discharge immunity 8 kV air, 6 kV contact in accordance with IEC 61000-4-2 - Transient overvoltage 2 kV in accordance with IEC 61000-4-4 - Conducted RF immunity 10 V in accordance with EN 61000-4-6 - Conducted RF emission class A in accordance with EN 55011 |
| Certification and standards |
| Standards | Matching IEC 60947-4-1, |
| Certification | CE |
| 18 months warranty |
EOCR-FE420 Reference Wiring
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The analog current (4-20mA) signal output is powered by a 4-wire system, so the input side must be connected to a 2-wire system ※ The control power should be supplied by an isolation transformer connected between phases | The analog current (4-20mA) signal output is powered by a 4-wire system, so the input side must be connected to a 2-wire system ※ The control power should be supplied by an isolation transformer connected between phases |
EOCR-FE420 Dimensions
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EOCR-FE420 Product Ordering
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