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EOCR-PMZ  overview

✔ Higher Measurement Accuracy (1% Class)

✔ Built-in Dedicated MCU Microcontroller Unit

✔ Protection Functions: Overcurrent, Undercurrent, Phase Loss, Stall, Reverse, Current Imbalance, 

Ground Fault, Short Circuit, and Two 4-20mA Analog Outputs

✔ Modbus RS-485 Communication Function, Supporting up to 200 Nodes

✔ Main Protection Current Range 0.5~100A, External CT Up to 6000A

✔ Built-in Zero-Sequence Current Transformer (ZCT), No External ZCT Required Within 100A

✔ Digital Low-pass Filtering Function to Prevent False Trips for Ground Fault Protection

✔ RTC Clock to Record Fault Time

✔ Selectable Fixed-time and Inverse-time Current-Time Characteristics

✔ Digital Display

♦ Cyclic Display of Three-phase Main Circuit Current, Short-circuit Current, and Ground Current 

Every 5 Seconds, with Option to Fix the Phase Display

♦ Display of Fault Cause and Current Value for Easy Troubleshooting

✔ Three Fault Records Retained Without Data Loss in Power-off Condition

✔ Operating Time Setting for Regular Maintenance Reminders, such as Bearing Replacement

✔ Analog (4-20mA) Signal Output for Centralized Equipment Management

✔ Customizable Output Contact State for Ground Fault (57-58)

✔ Selectable Zero-sequence Current Detection Method for Measuring Ground Leakage Current and 

Action Characteristics

✔ Reset Methods: Manual (RESET), Power-off, and Auto Reset

✔ Power-off Mode N and R Selectable ★ Suitable for 20~400Hz Variable Frequency Environments

✔ Removable Terminal, with Terminal Type and Through-type Freely Assembled

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EOCR-PMZ Protection Functions

✔ Overcurrent (Fixed-time: 0.2...30 seconds, Inverse-time: 1...30 class)

✔ Undercurrent (OFF, 0.2...30 seconds)

✔ Phase Loss (OFF, within 3 seconds)

✔ Reverse (0.1...0.3 seconds)

✔ Current Imbalance (8 seconds)

✔ Stall (0.5 seconds after D-Time)

✔ Locked Rotor (0.1...10 seconds)

✔ Ground Fault (0.05, 0.1...10 seconds)

✔ Short Circuit (0...20 seconds)

★ Two 4...20mA Analog Outputs, Function as Current Transducer

★ Modbus RS-485 Communication Function

EOCR-PMZ  Product Features

Product Information

Product RangeEOCR

Model NameEOCR-PMZ Motor Protection Relay

Protection Type

Overload Protection: In > Overcurrent Setting

Undercurrent Protection: In < Undercurrent Setting

Running Stall: In > 1.5...5 times Overcurrent Setting

Phase Loss Protection

Ground Fault: Ig > Ground Current Setting

Reverse Phase Protection

Start Stall: In > 2...10 times Overcurrent Setting

Imbalance Protection: 5...50%


 Output Range4...20 mA

Communication Modbus RTU

[Us]Rated 

Input Voltage

85...250 V AC/DC

Power Frequency

50...60 Hz

Protection 

Range

0.5...100 A

0.03...10 A,Fixed Time Limit OFF - Ground Fault Current

0.03...1 A   Inverse Time Limit - Ground Fault Current


Mounting 

Method

35 mm DIN Rail

Panel Mounting


Electrical/Mechanical Characteristics

Contact Type &

 Composition

 1 NC+1 NO,  OL ; 1 NO,  GR ; 1 NO,  SH


Reset method

Manual reset

Automatic reset:0.3…1200 秒

Electric reset:0…1 秒


Time 

Setting

Overcurrent Trip Time: 0.2...30 seconds (Fixed Time Limit)

Start Delay Time: 1...200 seconds, off

Undercurrent Trip Time: 0.5...30 seconds

Ground Fault Trip Delay Time During Start: 1...10 seconds, off

Overcurrent Trip Time: 1...30 class (Inverse Time Limit)

Ground Fault Trip Time: 0.05, 0.1...10 seconds (Fixed Time Limit)

Ground Fault Trip Time: 0.05...10 class (Inverse Time Limit)


[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 Voltage6 kV Conforming to IEC 60947-4-1

Power Consumption3 W

Display TypeBar graph and 7-segment LED display

[Ith]Continuous 

Current

3 A control circuit

Permissible Current250 V, 3A

Wiring

Control Circuit Cable: 2 x 1…1.5 mm², Flexible Cable with Terminal - M3

Control Circuit Cable: 2 x 1…1.5 mm², Flexible Cable without Terminal - M3

Control Circuit Cable: 1 x 1…2.5 mm², Flexible Cable with Terminal - M3

Control Circuit Cable: 1 x 1…2.5 mm², Flexible Cable without Terminal - M3


Tightening 

Torque

Control Circuit: 0.8...1.2 N·m, Suitable for Cable, Diameter 4.7 mm

Main Circuit: 2.5 N·m, Suitable for Terminal Clamp, Diameter 11 mm


Dimensions and weight

PFZ

Through bottm-hole typeThrough screw-terminal type

Height

55 mm96 mm

Width

90.3 mm96 mm

Depth

126.5 mm110 mm

Weight

0.425 kg
0.679 kg

Using Environment

Using TemperatureMatching IEC 60947-4-1, -20…60 °C

Storage Temperature

-40…85°C

Operating Altitude 2000m

IP RatingIP20 conforming to IEC 60529

Fire Resistance650°C, compliant with IEC 60695-2-12 standard

Shock Resistance15 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 Withstand6 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

StandardsIEC 60947-4-1

CertificationUL

18 months warranty



EOCR-PMZ  Reference Wiring

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EOCR-PMZ  Dimensions

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Through bottm-hole typev

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Through screw-terminal type

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EOCR-PMZ  Product Ordering

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Online consultation

If you are interested in our products, or if we can help you, you can call our national customer service number at any time:+86-17717479099

You can also communicate with us online, of course, you can also leave us a message below, we will be happy to serve you!