EOCR-SE

EOCR-SE
Electronic Overload Relay with Terminals
Overload and Phase Loss Protection
Visual load Setting Aid and Verify Actual Load Current.(No Ammeter Required)
Trip Indication(LED) and Fail-safe protection(N Type)
Flexible Power Supply(90 to 260VAC or 320 to 480VAC)
Remote Electrical Reset
Built-in Terminals for ease of connection
Description
Two of three phase motor currents are monitored by current transformers. CTs form integral part of the
relay, and external CTs are required for currents above 60Amps. The internal solid state circuitry
compares actual motor current with preset load current, set by Load Knob. Any changes greater than the
preset load current, due to either overload or single phasing, the red LED illuminates, indicating overload
condition exists. If the current level does not fall off below set value until the elapse of delay time, SPDT
relay changes state. The red LED remains illuminated indicating an overload trip has occurred. The relay
may be reset manually or remote electrically by interrupting power supply. With the visual aid of the red
LED, actual motor load current may be determined(no Ammeter required). Simply adjust the load knob
slowly CCW until red LED flickers, and read the current scale. The flashing red LED indicates 100% of
actual load current. The test button provides the means of testing the operation and integrity of the relay
with or without motor running, when TEST button is depressed and held, red LED illuminates and the relay
should trip after the delay time set at delay time Knob. Built-in convenience terminals are provided for ease
of connection(No internal connections).
How to set up
1) Set the single delay time knob to desired trip delay time, minimum equal to completion of
normal starting.
2) When commissioning the relay or motor, set the load currents at least over the full load
amperes.
3) With the control power on, depress the TEST button and hold. The LED should illuminate
and after the elapse of the preset delay time, the output relay should trip. Then reset.
4) Start the load, and slowly turn the LOAD Knob CCW, until the LED flashes, where the
100% of actual load currents is indicated. Then, set the trip setting to the desired load
currents.
5) The periodic testing of the unit, using TEST button is required to ensure full protection,
and regularly as a Preventive Maintenance.
Construction
Dimensions
Specifications
MODEL
Current Range
Operating Time
Accuracy
Time Characteristics
Control Voltage
Rated Voltage
Current Sensing
Output Contacts
Output Rating
Output Mode
Expected Relay Life
Reset
Environment
Insulation
Dielectric Strength
Impulse Voltage
Power Consumption
Mounting
Weight
Typical Application
EOCR-SE
05) 0.5 - 5A (scale 6.5A)
30) 3 - 30A (scale 35A)
60) 5 - 60A (scale 70A)
Over 60A to 800A, 05 fitted w/external CTs
O-TIME
0.2 - 15 seconds
±10%
Current
±15% of max. time set value
Time
Definite Time
220) Voltage Free(90~260)VAC, 50/60Hz
440) Voltage Free(320~480)VAC, 50/60Hz
Other Voltage optional.
600VAC, 50/60Hz
2 CTs
SPDT
3A/250VAC, 5A/125V, resistive, 5A/30VDC
Relay energized in normal state(Fail-safe, N Type)
Mechanical : 200,000,000 operations
Electrical : 100,000 ops at rated load
Manual or remote electrical by interrupting supply
Auto Reset optional
Run -20 + 70 deg.
Temp.
Store -30 + 80 deg.
Humidity
45~85% RH, Non-condensing
Between casing and circuits :
over 10M Ohms with DC500V megger
1)Between casing and circuits : AC 2000V, 60Hz, 1 min
2)Between contacts : AC 1000V, 60Hz, 1 min
3)Between circuits : AC 2000V, 60Hz, 1 min
1.2/50μsec, 5 , impulse, IEC255-4
Under 2VA
Panel
approximately 145 gram
Ordering Information
EOCR-SE-05 R-220
MODEL : Electronic Over Current Relay
Current Range : 05, 30, 60 Type
N : Relay energized in control power applied.
R : Relay de-energized in control power applied.
Control Voltage : 220, 440 VAC or Other
Tel +82 2 3473-2340 / Fax +82 2 3473-1159