EOCR_Digital Electronic Over Current Relay

Product catalog summary

Overview: The document provides technical specifications and features of electronic protection relays, specifically the EOCR-DS3 and EOCR-SS models. These relays are designed for motor protection with multiple functionalities and adjustable settings.

Specifications:

Dimensions: Compact design suitable for 35mm Din Rail or contactor mounting.
Current Range: Models cover a wide range from 0.5A to 720A with external current transformer options for higher ranges.
Voltage: Rated insulation voltage is 600VAC with control voltage options from 24 to 240VAC/DC.
Temperature: Operating temperature range is -20 to +60°C, and storage temperature range is -30 to +80°C.
Dielectric Strength: Between casing and circuit is 2kV for 1 minute.

Features:

Protection Functions: Includes over-current, phase loss, locked rotor, and phase reversal protection.
Adjustable Settings: Independently adjustable starting trip delay (D-TIME) and trip time (O-TIME).
LED Indicators: Two LED lamps provide easy troubleshooting and run-monitor functions.
Reset Options: Manual instantaneous reset and electrical remote reset available.
Energy Efficiency: Low energy consumption with significant cost savings over traditional relays.

Operation:

Over-current Protection: Triggers when motor current exceeds the set limit for a duration longer than the preset operating time.
Phase Loss Protection: Quick trip time prevents damage to motor windings during phase loss.
Looping Option: Allows for increased current measurement by looping wires multiple times through the relay.

Additional Notes:

Relays are ambient insensitive and have a wide current adjustment range (10:1).
Output relay contact status is 1a1b with a capacity of 3A/250VAC or 5A/30VDC.
Models are fitted to EOCR relays for large amp motor protection with a measuring class of 1.0.

Catalog excerpts

EOCR_Digital Electronic Over Current Relay-1

Electronic Protection

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EOCR_Digital Electronic Over Current Relay-2

Electronic Protection Relays Feature Compact Design MCU Bassed Multiple Protection Functions Wide Current Adjusment Range (10:1) Ammeter Function & Trip Indication Easy Trobuleshooting & Run Monitor Manual Instanditive / Electrical Remote Reset Test Function Ambient Insensitive Normally relay energized (N type) 3 Integral Current Transformer Electronic Shear-pin Function Independently Adjustable Starting Trip Run Monitor & Troubleshooting with 2-LED’s Delay (D-TIME) & Trip (O-TIME) 2 LED Lamps on the dial plate provide easy troubleshooting and run-monitor functions Motor Status Pulse Signal Protective...

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EOCR_Digital Electronic Over Current Relay-3

Typical Wiring In case line voltage in 380V or 440V. the isolated step-down transformer for power supply to LED should be used. 2 Integral Current Transformer Normaiiy relay energized (N type) Independently Adjustable Starting Trip Output Relay Delay (D-TIME) & Trip (O-TIME) Protection Protective Item Operating (Trip) Time Time - Current Characteristic Curve Time (sec) Locked Rotor ManualReset button ElectronicReset after stopping power supply Ambient Temperature 20∼60℃ (Operating) Ambient Temperature 30∼80℃ (Storge) Between casing & circuit Over 2kV (60Hz) for 1 min. Current Setting Dielectric...

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EOCR_Digital Electronic Over Current Relay-4

■.Fitted to EOCR relays for Large Amp Motor Protection

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Electronic Protection Relays Features Looping Option Motors that require one-third or one-fourth the relay capability can use the same size relay by looping wires 2 or 3 times. Each additional loop will increase the current measured by one time of the single loop. Compact Design Multiple Protection Function Wide Current Adjustment Range (10:1) Trip Indication High Accuracy Manual Instantaneous Reset Electrical Remote Reset Test Function Ambient Insensitive Low Energy Consumption Normally relay energized (N type) O-Time Setting 12 0 Se co nds (Wh en In2Ie) Preset O-Time (Wh en InIs) Looping Option...

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