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Eocr 3de 3ez

This document provides specifications for two multi-function microprocessor-based circuit breaker relays: the EOCR-3DE and EOCR-3EZ. The EOCR-3DE provides overcurrent, undercurrent, phase loss, phase unbalance, phase reversal, and locked rotor protection. It has adjustable trip time characteristics and load alerting functionality. The EOCR-3EZ provides all the same protections as the EOCR-3DE plus ground fault protection. Both models have digital ammeters, trip cause indicators, and independently adjustable start and trip delay times.

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Mushfiqur Rahman
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389 views1 page

Eocr 3de 3ez

This document provides specifications for two multi-function microprocessor-based circuit breaker relays: the EOCR-3DE and EOCR-3EZ. The EOCR-3DE provides overcurrent, undercurrent, phase loss, phase unbalance, phase reversal, and locked rotor protection. It has adjustable trip time characteristics and load alerting functionality. The EOCR-3EZ provides all the same protections as the EOCR-3DE plus ground fault protection. Both models have digital ammeters, trip cause indicators, and independently adjustable start and trip delay times.

Uploaded by

Mushfiqur Rahman
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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EOCR-3DE/3EZ

MCU Based
3 Integral Current Transformers
Over-current, Under-Current, Phase Loss, Phase
Unbalance, Phase Reversal, Locked Rotor Protection
Digital Ammeter & Trip cause indication
Selectable Trip Time-Current Characteristics
Independently Adjustable Starting Trip Delay and
Operating Trip Time
+ Load Alerting Function
EOCR-3DE
+ Ground Fault Protection EOCR-3EZ
EOCR-3DE / 3EZ

Protection

Typical Wiring
EOCR-3DE

Protective Item
Over-current
Under-current
Phase Loss
Phase Unbalance
Phase Reversal
Locked Rotor
-

EOCR-3EZ
Trip Time
O-TIME
0.5~30 sec
3 sec
8 sec
0.1~0.3 sec
D-TIME
-

Protective Item
Over-current
Under-current
Phase Loss
Phase Unbalance
Phase Reversal
Locked Rotor
Ground Fault

Trip Time
O-TIME
0.5~30 sec
3 sec
8 sec
0.1~0.3 sec
D-TIME
0.05~10 sec

Specification
Model
Over Current Setting Range
Ground Fault Current Setting
Alert Setting
Start Delay Time Setting (D-TIME)
Trip Delay Time Setting (O-TIME) INV
DEF
Control Voltage
Contact Rating
OL
AL/GR
Rating
Time Characteristic
In/tcmode
dE/tcmode
Troubleshooting / Trip Indication
Current Sensing
Mounting

EOCR-3DE

EOCR-3EZ
Refer Table #1

50 ~ 100% / OFF

A: 0.02 ~ 3A / B: 0.2~10A
-

1 ~ 200 sec
1 ~ 30
0.2 ~ 30 sec
24VAC/DC, 110VAC 15%, 220VAC 15%
2-SPST
1-SPST
AL Relay
Ground Fault Relay
3A/250VAC Resistive
Inverse (See Curve-1)
Definite (See Curve-2)
LED Display (SSD+LED)
3-CT
35mm Din-rail

EOCR-3DE

Table #1. Current Range


Current Setting Range
(Amps)
0.5 ~ 60A
0.25 ~ 3.0A
0.1 ~ 1.2A
1 ~ 12A
1.5 ~ 18A
2.0 ~ 24A
2.5 ~ 30A
3.0 ~ 36A
4.0 ~ 48A
5 ~ 60A
6 ~ 72A
7.5 ~ 90A
10 ~ 120A
12 ~ 144A
15 ~ 180A
20 ~ 240A
25 ~ 300A
30 ~ 360A
40 ~ 480A
50 ~ 600A
60 ~ 720A
75 ~ 900A
80 ~ 960A

12

Number of Conductors
thru CT windows
1
2
5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Extermal CT Ratio

Setting of CT Ratio

Remark

10 : 5
15 : 5
20 : 5
25 : 5
30 : 5
40 : 5
50 : 5
60 : 5
75 : 5
100 : 5
120 : 5
150 : 5
200 : 5
250 : 5
300 : 5
400 : 5
500 : 5
600 : 5
750 : 5
800 : 5

OFF(Mode : --)
2t
5t
10
15
20
25
30
40
50
60
75
100
120
150
200
250
300
400
500
600
750
800

Wide Range

EOCR-3EZ
Tolerance(3DD/ 3DZ / FD / FDZ / PMZ / SSD)
Current

Time

I<1A :
I 1A :

0.05A
5%

0.05s Within 0.05s


t 3s : 0.2S
t>3s : 5%

Caution
The extermal CT should be used in case Inverse curve(toln setting)
is applied over 10Amps.

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