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Overload Relay |   |
 +44 (0) 118 9700010 sales@icc-gb.com |
 
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EOCR-SS
ELECTRONIC OVERLOAD RELAY
Introduction
1) Over Load and Phase Loss Protection
2) Independently adjustable starting and Trip Delay
3) Visual Current Setting Aid & Trip Indication(LED)
4) Flexible Power Supply(90 to 260VAC or 320 to 480VAC)
5) Fail Safe Protection(N type)
6) Electronic Shear-pin function
Description
Two of three phase motor current are monitored by current
transformers. External CTs are required for currents more than 60Amps.
The internal solid state circuitry compares with the preset current level.
When load currents exceeds the preset trip level, red LED illuminates,
and after the preset time, the device trips, and changes internal SPDT
relay contacts. Red LED remains illuminated indicating an overload trip
has occurred and Green LED(PWR)goes off. Util manual or remote
electrical reset by interrupting supply, is initiated.if load current falls
off below
set point before the preset delay, device resets trip timer. with the visual
aid of LED,
flashing at 100% of preset load, actual load currents can be determined without
the aid of Ammeter. TEST button provides the means of testing service-worthiness
and integrity of the device. Internal relay is energized in normal operation
condition(fail-safe)
and will not become ready mode with either supply lost or own failure.
Starting delay time range : 0.2 - 30 seconds.
Trip delay time range : 0.2 - 10 seconds. May be used as electronic shearpin
by setting trip time
to minimum.
HOW TO SET UP
1) When commissioning, set start delay time(D-Time knob)
to known motor run-up time, or to the maximum. If
not known.
2) Set trip delay time(O-Time knob) to desired trip time.
3) Set load currents(LOAD knob) at the rated full load or desired currents.
4) With connections made and control power on, depress TEST button and hold.
Verify the red LED illuminates
and the internal relay should switch contacts
after the sum of D-Time and
O-Time. Depress reset button.
5) Start the motor and notice run-up time. Then, slowly turn the LOAD knob
CCW, until the LED
flashes, where the 100% of the actual load currents is indicated.
Set the LOAD knob to the
desired trip currents. 110 ~ 125% setting of running current
is recommended.
6) Reset D-Time knob setting to normal run-up time.
7) Periodic testing of TEST button is recommended to ensure the full protection
and regularly as
a preventive maintenance.
Ordering information
