EOCR-3E420 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 current 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

• 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

35mm DIN rail mounting or screw fixing

• 1 NC + 1 NO (OL)

• 1 NO

[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

Bar graph and 7-segment LED display

[Ith] 

Continuous Current

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

Control circuit 0.8...1.2 N·m suitable for 4.7 mm cable

Through screw-terminal type

56.3 mm

91.3 mm

106

4 gn panel mounting in compliance with IEC 60068-2-6

2 gn 35mm DIN rail mounting in compliance with IEC 60068-2-6

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