ELD V2 EARTH LEAKAGE RELAY
Issue: R8, Date: 10/08/2011, CRN: 8530
ELDB006 Rev8 ELD V2 (2002) Earth Leakage Protection Relay User Manual
Page 11
5.3
Testing Procedure
A test current is injected through the window of the toroid to test the operation of the relay (See typical connection
diagram on page 16Appendix A – Drawings). To reset the relay: press the button located on the facia of the relay, or
provide an external normally open contact. (It is recommended that a twisted pair be used between the N/O contact
and the reset input). The reset button is also used to access the memory of the processor to view the maximum level
of leakage since the previous trip. A section of the bar graph will slow flash (2Hz) indicating the peak level while the
reset button is held closed, and will continue to flash for 1 second after the reset button is released.
5.4
Toroids
The ELD V2 Relay is designed for use with Ampcontrol EL500S series Toroids. They are available with window
sizes 25, 60, & 112mm. These allow trip settings from 100mA to 2500mA.
5.5
Mode of Operation
To comply with AS/NZS 2081.3:2002 the relay can only be operated in the fail-safe mode.
This is the default mode, where the relay drops out on fault or loss of power. Power to the relay is from the line side
of the isolating device or from an independent supply.
6
Specifications
Relay Supply Volts:
25.6 –132VAC, 20-185VDC
Power Consumption Approx. 4VA
4-20mA Output:
The ‘Loop Powered’ current output represents the leakage current as a percentage of the trip level.
4mA => 0% leakage, 20mA =>120% leakage (100% = 17.33mA)
Maximum Loop Resistance = [Vs-10] x 50, where Vs must be greater than 10VDC and less than 30VDC.
4 – 20mA accuracy ± 2% of full scale.
Relay Contacts:
1 N/O, 1 C/O. Rated at 5A 250V.
Relay to Toroid
Loop resistance < 1 ohm
Dimensions:
Overall:
77 W x 47 H x 116 D mm
Cut-out:
69 W x 39 H mm
