SCHNEIDER EOCR I3MZ – WRDUW ELECTRONIC OVER CURRENT RELAY 100~240V SIDE HOLE
- BRAND: I3MZ-WRDUW
- SCHNEIDER ELECTRIC
- MAIN CIRCUIT: Ue 690V, Uimp: 6KV, le: 0.5-60A
- CONTROL VOLTAGE: Ue: 100-240VAC/DC, 50/60 HZ, Uimp-4KV
- AUX CONTACT: 3A/250VAC RESISTIVE
- OL(1NC), GR(1NO)
- CCAWG18….14, CU 75 C
- TORQUE: 0.8….1.2 N.MÂ 1588-2630
- MADE IN SOUTH KOREA
- SAMWHA EOCK
The Schneider Electric EOCR I3MZ-WRDUW is a compact, digital, and highly reliable electronic overload relay designed to protect three-phase motors and other electrical equipment from damaging overcurrent conditions. It is a key component in motor control centers (MCCs) and starter panels, replacing traditional thermal overload relays with superior accuracy and functionality.
Its “SIDE HOLE” design refers to the mounting style, where the unit is secured from the side, making it easy to install and remove without needing to dismount the entire contactor in a crowded panel.
Key Features and Benefits
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Wide Supply Voltage (100-240V AC/DC):Â Can be powered directly from a wide range of control voltages, simplifying inventory and design for various international and industrial applications.
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3-Range Selectability:Â A single model covers multiple current ranges (see specifications below), reducing the number of variants needed in stock.
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Digital Display & LED Indicators:Â Features a clear digital LCD for setting parameters and viewing real-time current, as well as LEDs for status indications (Power, Trip, Warning).
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Advanced Protection Functions:
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Overload (OL):Â Protects against sustained overcurrents based on a user-defined Inverse Time Curve.
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Short Circuit (SC):Â Provides instantaneous or time-delayed protection against high-level fault currents.
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Phase Loss / Unbalance:Â Detects and trips for missing phases or significant current imbalance between phases, which can damage motors.
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Reverse Phase / Phase Sequence:Â Protects against incorrect phase rotation.
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Locked Rotor / Jam:Â Specialized protection for when a motor rotor is unable to turn.
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Undercurrent / Light Load:Â Protects against conditions like a broken pump coupling or loss of load.
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Side Hole Mounting (WRDUW):Â This design allows for easy installation and removal from the side of compatible contactors (like Schneider’s TeSys D-line), saving space and time during maintenance.
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Communication Ready:Â Supports Modbus RTU communication via an optional module (EOCR-COMM), enabling integration into SCADA and PLC systems for remote monitoring and control.
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Test and Reset Functions:Â Built-in test functionality to verify operation and both manual and automatic reset options.
Technical Specifications
| Category | Specification |
|---|---|
| Model | EOCR I3MZ-WRDUW |
| Product Line | EOCR (Electronic Over-Current Relay) |
| Supply Voltage | 100 ~ 240V AC/DC, 50/60Hz |
| Current Ranges | 0.5 ~ 2A, 2 ~ 8A, 5 ~ 20A (User selectable) |
| Protection Functions | Overload (OL), Short Circuit (SC), Phase Loss, Unbalance, Reverse Phase, Locked Rotor, Undercurrent |
| Display | LCD with 3-digit readout for settings and real-time current |
| Mounting | Side Hole (Specifically for TeSys D contactors) |
| Communication | Optional Modbus RTU (with EOCR-COMM module) |
| Output Contacts | 1x Fault Relay (SPDT – 250VAC/5A), 1x Alarm Relay (SPDT – 250VAC/5A) |
| Reset Mode | Manual, Automatic, Remote |
| Standards | CE, UL, cUL |
Typical Applications
The EOCR I3MZ-WRDUW is ideal for protecting motors and systems in a wide range of industries, including:
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HVAC Systems:Â Pumps, fans, and compressors.
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Water & Wastewater Treatment:Â Pumps and aerators.
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Industrial Machinery:Â Conveyors, crushers, mixers, and machine tools.
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Manufacturing Plants:Â Production line equipment.
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Building Automation:Â For any motor-driven application requiring reliable protection.
