Concord

Electronic Overload Relays

Concord > Electronic Overload Relays

1.COCR 3DE/3EZ

Features

  • 3 Integral Current Transformers
  • Multiple Protection Features
  • Digital Ammeter and fault Diagnosis
  • Wide Current Adjustment range
  • definite/inverse
  • Manual/Remote Reset
  • Ambient Insensitive
  • Alert function before trip

In Built Protections

Specifications

Set Up Instructions

Wiring Diagram For EOCR 3EZ

Wiring Diagram For EOCR 3DE

2.EOCR DS

Features

  • 3 Integral Current Transformer’s
  • * Independently Adjustable D-Time and O-Time
  • Independent Mounting
  • Run Monitor and Fault Diagnosis with 2 LED’s
  • Highly accurate protection for Phase Loss and Locked Rotor
  • Space-Efficient Form Factor (Micro-Compact Design)

Protection Functions

  • Overcurrent O-Time
  • Phase Loss Within 4secs
  • Locked Rotor Within D-Tim
  • Phase Reverse Within 0.1sec

Specifications

Current Setting Type Range
05 0.5-6A
30 3-30A
60 5-60A
100A and above With External CT
Time Setting Start (D-Time) 0.2-30 sec
Trip (O-Time) 0.2-10 sec
Control Voltage 220 24-240VAC/DC
Contact Rating Mode 1SPDT (1C)
Rating 3A 250VAC
Status Normally Energized
Time current Characteristic Definite
Operating (Trip Indication) 2 LED with Fault Diagnosis
Mounting 35mm DIN Rail/Base

Example Wiring Diagram

Time Trip Characteristic – Definite (Inverse available on Request)

Time Trip Characteristic – Definite (Inverse available on Request)

Current Multiples of Current Setting

Overall Dimensions

3.EOCR SS – SOLID STATE PROTECTION RELAY ANALOG TYPE

Features

  • Space-Efficient Form Factor (Micro-Compact Design)
  • Protection against over current/phase loss/locked rotor (phase loss/locked rotor operates within Sum of D-Time + O-Time)
  • Resistant to Shock, Vibration and Dust
  • Universal Power Supply Mode for AC/DC (100~240V)
  • Operation Status Display and Active current checking through LED’s
  • Manual/Electrical remote Reset provision
  • NVR (No volt Release) Function/ Fail Safe
  • Low Energy Consumption and Strong resistance to harsh environments

Protection Functions

  • Overcurrent O-Time
  • Phase Loss Within 4secs
  • Locked Rotor Within D-Tim
  • Phase Reverse Within 0.1sec

Specifications

Current Setting Type Range
05 0.5-6A
30 3-30A
60 5-60A
100A and above With External CT
Time Setting Start (D-Time) 0.2-30 sec
Trip (O-Time) 0.2-10 sec
Control Voltage 220 24-240V AC/DC
Contact Rating Mode 2SPST 3A/250VAC
Rating 3A 250VAC
Contact Fail Safe / Non Fail Safe User selectable
Time current Characteristic Definite
Operating (Trip Indication) 2 LED
Mounting 35mm DIN Rail/Base

Protection Functions

Protected Items Operation Time
Over Current O-TIME
Phase Loss O-TIME
Locked Rotor O-TIME + D-TIME

Operation Display

“N” (Fail safe) Type converts95-96 to open and 95-98 to close when operating power is supplied to A1 and A2 (or L1 and L2).

Overall Dimensions

4.EOCR SSD – SOLID STATE PROTECTION RELAY ANALOG TYPE WITH DIGITAL DIPLAY

Features

  • 2 CT based Digital Protection Relay – Directly replaces the SS model
  • Current Display of max. current in any Phase
  • 7 Segment LED Diagnostic Display
  • Highly accurate protection for Phase Loss and Locked Rotor
  • Space-Efficient Form Factor (Micro-Compact Design)
  • Independent settings for D-Time, O-Time and Current
  • Suitable for 1 Phase or 3 Phase motors
  • Universal Power Supply Mode for AC/DC (100~240V)

Specifications

Current Setting
Type Range
05 0.5-6A
30 3-30A
60 10-60A
Starting Delay Time
(D-Time)		 1-30 sec
Operating Time
(O-Time)		 1-10 sec
Reset Manual/Remote
Overcurrent Trip Definite
Control Voltage 24~240V AC/DC
Contact Rating 2 SPST 3A/250VAC
Fault Diagnosis 7 segment LED Display
Mounting 35mm DIN Rail/Base

Protection Functions

Protection Function Operation Time
Over Current Operates after O-Time
Phase Loss Operates within 3 sec
Locked Rotor Immediately operates if 200% or more of the set current continues after D-Time

Trip Cause Method and Check Method

Product DImensions