CONCORD

http://www.cacindia.net

Electronic Overload RelaysElectronic Overload Relays

EOCR

ISO 9001 : 2008

NABCBQ M 0 3 0

U®

CONCORD has been the pioneer of the Electronic Motor Protection technology in the Indian market with innovative and useful products for the

Industry since 1997. We design build and supply a vast array of Electronic Protection Relays and our vision is to become the best supplier for Motor

protection and Motor management for its customers nationwide.

Electronic Overload Relays

Salient Features

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Compact Design

2/3 Integral Current Transformers

Multiple Protection Features

Wide Current Adjustment Range

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Ammeter Function

Trip Indication/ Fault Diagnosis

Highly Accurate

Looping Options

Manual/ Electrical Remote Reset

EOCREOCR

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Test Function

Suitable for use with External CT’s upto 600A

Ambient Insensitive

Low Energy Consumption

D-Time (Starting delay Time)

O-Time (Operating Time)

The D-Time is the time taken by the motor before it reaches it’s normal

running current. During start the motor draws much higher levels of

current and the D-Time setting is to ensure that the EOCR does not

cause any nuiscance trippings before this set time has elapsed. After the

D-Time setting is over the relay monitors the normal running currents.

Full Load Current

Set Current

TRIP

D-Time

Normal Load

O-Time

CURRENT

TIM

E

O-Time is the operating time in the event of overload. When motor

current exceeds the desired set current value, the EOCR detects the

increase and trips the motor within the set O-Time preventing excess

heating and long periods of overload.

The TEST function facility on the front face of the relay is provided to

check the health status of the relay without electrically nergizing the

relay. On pressing the TEST button the internal relay will trip after the D-

Time + O-Time settings have elapsed. After using this test facility , the

RESET button has to be pressed to operate the relay

By pressing the RESET button or disconnecting the electrical supply

will trip the relay immediately. Once the relay has tripped due to any

Over Load or any other fault, the relay has to be reset to start the

motor again.

Reset Function

TEST RESET

Looping Option

The Looping option is required in case the amount of current

measurement is desired to be more accurate and precise. The wire from

the main line when passing through the Internal EOCR CT is looped one

or more times depending upon the current range of the relay to suit the

application.

External CT Option

By using External CT’s with secondary rating of 5A the EOCR can be

used to monitor and protect motors with normal running currents of

upto 600A. This is used with an 05 Type relay with current setting range

of 0.5 - 6A. In Digital models the display current values are selectable as

desired.

[A] 1x

0,5-6

2,5-30

5-60

-05

-30

-60

2x

0,25-6

1,25-15

2,5-30

0,17-2

0,83-10

1,7-20

3x

0,13-1,5

0,62-7,5

1,25-15

4x 5x

0,1-1,2

0,5-6

1-12

Test Function

CONCORD

Wiring Diagram

Overall Dimesnions

MC

Tr.

L1L2

9596

98

EOCR SS

M

MC ON

OFF/RESET

L1 L2 L3

10

54

54

65

4416

5 - M3.58.4DIN RAIL TYPE

L1L2

9596

9798 N

R

M

EOCR DS3

MC

MC

Tr.

OFF/RESET

ON

Overall DImensions

58 39

4612

1076-M3.5

69

81

L1 L2 L3

Fuse Tr.

MC MC

MC

ON

OFF(RESET)

A1A295969798

M EOCR SSD N TYPE

Overall DImensions

8 8 8 8 CONCORD

12

6-M3.5

50.8

19.5

58

51

62.2

10

77.2

Features

3 Integral Current Transformers

Independently adjustable D-Time and O-Time

Independent Mounting

Run Monitor and Fault Diagnosis with 2 LED’s

Protection Functions

Overcurrent

Phase Loss

Locked Rotor

Phase Reverse

O-Time

Within 4 seconds

Within D-Time

0.1sec

Specifications

Current Setting

Time Setting

Control Voltage

Contact Rating

Time CurrentCharacteristicOperating(Trip Indication

Mounting

Type053060100A and aboveStart(D-Time

Trip (O-Time)Control Voltage

Contact RatingRating(R)Status

Definite

2 LED with Fault Diagnosis

35mm DIN Rail/Base

Range0.5-6A3-30A5-60AWith External CT1 - 50sec

0.2-10sec180-260VAC

1SPDT(1C)3A 250VACNormallyEnergized

Protection Functions

Over current

Phase Loss

Locked Rotor

O-Time

Within 4 sec

0.5 sec after D Time

has elapsed

Features

2 CT based Digital Protection Relay

Current Display of Max. current in any phase

Highly accurate protection for Locked Rotor

Compact Size and Ambient Insensitive

Indepebdent settings for D-Time and O-Time

Specifications

Current Setting

Starting Delay Time 1-30 sec

(D-Time)

Operating Time 1-10 sec

(O-Time)

Reset Manual/Remote

Overcurrent Trip Definite

Control Voltage 110V AC/220V AC

Contact Rating 2SPST 3A/250V AC Resistive

Fault Diagnosis 7 Segment LED Display

Mounting 35mm DIN Rail/Base

05 0.5-6A30 3-30A60 5-60A

Overcurrent O-Time

Phase Loss O-Time

Locked Rotor O-Time + D-Time

Protection Functions

Features

Specifications

Current Setting

Time Setting

Control Voltage

Contact Rating

Time Current

Characteristic

Operating

(Trip Indication)

Mounting

Type

05

30

60

100A and above

Start(D-Time

Trip (O-Time)

220

440

Mode

Rating(R)

Status

Definite

2 LED

35mm DIN Rail/Base

Range

0.5-6A

3-30A

5-60A

With External CT

0.2-30sec

0.2-10sec

90-260VAC

320-480VAC

1SPDT(1C)

3A 250VAC

Normally

Energized

EOCR SSDEOCR DS EOCR SS

Wiring Diagram Wiring Diagram

SOLID STATE MCU BASED DIGITAL

2 Integral Current Transformer’s

Electronic Shear Pin Function

Independently Adjustable D-Time and O-Time

Independent Mounting

L3L2L1

Available in your area with:

For More details/information, please contact:CONCORD AUTOMATION & CONTROLS

G 43, DLF Industrial Estate, 1 Faridabad

121003 Haryana (INDIA)

Phone :

Mobile :

Fax :

0129 2278256, 2273860

+91 9810659379

0129 2278350

Email :

Website : http://www.cacindia.net

info@cacindia.net

CONCORDWiring Diagram

Overall DImensions

Trip Characteristic

L1 L2 L3

FUSE Tr.*

MC

EOC

R 3

DE

M

RESETOFF MC

MCON

ALERTTRIP

R GMCSTOP

EOCR-3DE

A1

A2

96 98

95 97 07

08

OL/UL

AL/UL

A1

A2

95

96

97

98

07

08

EOCR 3DE EOCR 3EZ

EO

CR 3

EZ

A1

A2

Z1Z2

97

98

57

58

L1 L2 L3

FUSE Tr.

MC Aux

MC RESET OFF

MC

MCON

R G Y

Stop Run

Aux

AuxTrip/GR

GROL/ULEOCR-3EZ

A1

A2

Z1

Z2 97

98 58

57

M

Z2(k)

Z1(k)

~

70

10

16

53

DIN RAIL TYPE

71 59

15

7.5

55

10 10

20 20

30 30

0.1

1

1 2 4 6 8 10

10

100

1000

10000TIME (sec)

CURRENTMultiples of Current Setting

HOT

COLDTIME ( sec)

Ad

just

able

CurrentMultiples of Current Setting

0.21

0 1 2 3 4 5 6

30

Inverse Type - EOCR 3DE/EZ Definite Type - EOCR SS/SSD/DS

Protection Functions

Protection

Overcurren

Undercurrent

Phase Loss

Phase Unbalance

Phase Reverse

Locked Rotor

Ground Fault

3DE Trip Time

O-Time

0.5-30 sec

3 sec

8 sec

0.1-0.3 sec

D-Time

NA

Trip Time

3EZ

O-Time

0.5-30 sec

3 sec

8 sec

0.1-0.3 sec

D-Time

0.05-10 sec

Features

MCU Based Design

3 Integral Current Transformers

Multiple Protection Features

Digital Ammeter and Fault Diagnosis

Wide Current Adjustment range

User selectable Time Current curves - Definite/Inverse

Manual/Remote reset

Ambient Insensitive

Alert Function before trip

Specifications

Current Setting

Above 60A

Ground Fault setting

Alert Setting

Start Delay Tim

(D-Time)

Trip Delay Time

(O-Time)

Control Voltage

Contact Rating

Trip Time

Characteristic

Fault Diagnosis

Mounting

3DE

05/60A

With Suitable External CT

NA

5-100%/OFF

1-200 sec

INV

DEF

110VAC/220VAC

2 SPST 3A/250V Resistive

INV/DEF- Refer to Graph

7 segment LED Display

35mm DIN Rail/Base

3EZ

05/60A

A:0.02-3A, B:0.2-10A

NA

1-30 sec

0.2-30 sec

EOCR 3DE / 3EZ

DIGITAL

*We reserve the right to change specification without notice