Korean Over 60A 0.5A 30A thermal Fitted W/External CTs EOCR SS Overload protection Relay

1.Overload 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

Two of three phase motor currents are monitored by current transformers.External Cts are  required for currents more than 60Amps.The internal solid state circuitry compares with the preset current time,the device trips,and changes internal SPDT relay contacts,Red LED remains illuminated indicating an overload trip has occurred.Until manual or remote electrical reset by interrupting supply,is initiated.

If load current falls off below setpoint 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 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.

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 currents.

3)Set load currents(LOAD knob)at rhe 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.