Ampcontrol ELD V2 User manual

Part Number: 121581
Revision: 9 –March 2014
Designed and manufactured in Australia by Ampcontrol Electronics Pty Ltd
ELDV2–EARTHLEAKAGEPROTECTIONRELAY
UserManual

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Ampcontrol Electronics
ELDB006R9 ELD V2 USER MANUAL
Rev 9 –03/14, ECN: 10573
WARNING!
This safety alert symbol identifies important safety messages in this
manual and indicates a potential risk of injury or even death to
personnel. When you see this symbol, be alert, your safety is
involved, carefully read the message that follows, and inform other
operators.
CAUTION!
This safety alert symbol identifies important information to be read in
order to ensure the correct sequence of work and to avoid damage or
even destruction of the equipment, and reduce any potential risk of
injury or death to personnel.
Supplementary information not directly affecting safety or damage to
equipment. Carefully read the message that follows, and inform other
relevant personnel.
Information concerning possible impact on the environment and
actions required for prevention and proper response.

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ELDB006R9 ELD V2 USER MANUAL
Rev 9 –03/14, ECN: 10573
Copyright Notice
The Ampcontrol ELD V2 relay described in this document is the property of AMPCONTROL PTY LTD. It
is furnished under a license agreement and is to be used only in accordance with the terms of the
agreement.
No part of the hardware or documentation may be reproduced, transmitted, transcribed, stored in a
retrieval system, or translated into any language or computer language, in any form or by any means,
without prior written permission of AMPCONTROL PTY LTD.
Disclaimer
While every effort has been made to assure the accuracy and clarity of this document, AMPCONTROL
PTY LTD assumes no liability resulting from any omissions in this document, or from misuse of the
information obtained herein. The information in this document has been carefully checked and is
believed to be entirely reliable with all of the necessary information included. AMPCONTROL PTY LTD
reserves the right to make changes to any products described herein to improve reliability, function, or
design, and reserves the right to revise this document and make changes from time to time in content
hereof with no obligation to notify any persons of revisions or changes. AMPCONTROL PTY LTD does
not assume any liability arising out of the application or any use of any product or circuit described
herein; neither does it convey license under its patent rights or the rights of others.
Before You Begin
We would like to take a moment to thank you for purchasing the Ampcontrol ELD V2 Earth Leakage
Relay.
WARNING!
To become completely familiar with this equipment and to
ensure correct operation, we strongly recommend that you
take the time to read and thoroughly understand this user
manual.
Ampcontrol Electronics Contact Details
7 Billbrooke Close, Cameron Park, NSW, 2285
P [phone] | F [phone]
EMAIL: [e-mail]
WEB: www.ampcontrolgroup.com

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Ampcontrol Electronics
ELDB006R9 ELD V2 USER MANUAL
Rev 9 –03/14, ECN: 10573
TABLE OF CONTENTS
1 SAFETY AND OTHER WARNINGS..................................................................5
1.1 Safe Use of Equipment..............................................................................5
2 RECEIVING AND STORAGE............................................................................6
2.1 Receiving...................................................................................................6
2.2 Inspection..................................................................................................6
2.3 Storage after Delivery................................................................................6
2.4 Unpacking of Equipment............................................................................6
3 INSTALLATION.................................................................................................7
3.1 General Warnings......................................................................................7
3.2 Mandatory Installation Practices ................................................................7
4 OVERVIEW OF EARTH LEAKAGE PROTECTION ..........................................9
4.1 Overview of Protection Problems...............................................................9
4.2 Earth Leakage Systems...........................................................................10
4.3 Methods of Earth Leakage Protection......................................................10
4.4 Earth Leakage Toroids.............................................................................11
5 COMMISSIONING AND CALIBRATION .........................................................13
5.1 Earth Leakage Test .................................................................................13
6 ELD V2 OPERATION AND TESTING.............................................................14
6.1 Methods of Earth Leakage Protection......................................................14
6.2 Mechanical Arrangement.........................................................................15
6.3 Electrical Connections .............................................................................16
7 OPERATION SUMMARY................................................................................17
7.1 Rotary Switches Configuration.................................................................17
7.2 Indication LEDs........................................................................................17
7.3 Mode of Operation...................................................................................17
8 SERVICE, MAINTENANCE & DISPOSAL.......................................................18
8.1 Equipment Service...................................................................................18
8.2 Equipment Maintenance..........................................................................18
8.3 Disposal...................................................................................................19
9 SPECIFICATIONS ..........................................................................................20
10 EQUIPMENT LIST ........................................................................................21

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1 SAFETY AND OTHER WARNINGS
For safety reasons, the ELD V2 relay must be installed, operated and serviced only by competent
personnel. Read and understand this instruction manual completely before installing, operating or
servicing this equipment. Failure to install or operate this instrument in accordance with the instructions
contained in this manual may create hazardous operating conditions.
1.1 Safe Use of Equipment
The equipment supplied has been manufactured according to the state of the art, and designed to
ensure a safe operation. The equipment may only be used within the design parameters.
The instructions within this manual must be observed as an aid towards achieving maximum safety
during operation.
The owner/user is responsible for observing the following instructions:
1.1.1 Changes to Equipment
Changes in the design and modifications to the equipment are not permitted. Unauthorised changes
made to the hardware or operating firmware will void the manufacturer's warranty, and may
compromise the integrity of the system into which it is installed and other connected equipment.
1.1.2 Equipment Knowledge
Experience with, or understanding of, this equipment is essential for the safe installation and removal of
the equipment. Therefore, in case of a question on how to safely proceed, contact Ampcontrol
immediately.
1.1.3 Manual Handling
Precautions have been taken to ensure all equipment is safe to handle and free from sharp edges.
However care should always be taken when handling enclosures and gloves should be worn.
1.1.4 Installation
Correct operation and safety depend on the ELD V2 relay and associated equipment being installed
correctly. Mechanical and or electrical installation and maintenance of plant and equipment must only be
carried out by appropriately qualified personnel and must be tested thoroughly prior to operation.
1.1.5 Operation
As safety depends on the ELD V2 relay functioning correctly it is highly recommended that all safety
functions of the relay be periodically tested to ensure correct operation.

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2 RECEIVING AND STORAGE
2.1 Receiving
All possible precautions are taken to protect the equipment against damage or losses during shipment,
however before accepting delivery, check all items against the packing list or bill of lading. If there are
shortages or evidence of physical damage, notify Ampcontrol immediately.
Notify Ampcontrol within 7 days (maximum) in case of shortages or discrepancies, according to the
packing list. This action will help ensure a speedy resolution to any perceived problems. Keep a record
of all claims and correspondence. Photographs are recommended.
Where practicable do not remove protective covers prior to installation unless there are indications of
damage. Boxes opened for inspection and inventory should be carefully repacked to ensure protection
of the contents or else the parts should be packaged and stored in a safe place. Examine all packing
boxes, wrappings and covers for items attached to them, especially if the wrappings are to be discarded.
2.2 Inspection
Equipment that is found to be damaged or has been modified away from its published specification must
not be used. Please contact Ampcontrol if the equipment is suspected to be different than that ordered
or if it does not match the published specifications.
2.3 Storage after Delivery
When the equipment is not to be installed immediately, proper storage is important to ensure protection
of equipment and validity of warranty.
All equipment should be stored indoors, preferably on shelves and protected from the elements.
2.4 Unpacking of Equipment
The method of packing used will depend on the size and quantity of the equipment. The following
cautions should be interpreted as appropriate.
CAUTION!
Take care when unpacking crates as the contents may have shifted
during transport.
The disposal of packaging materials, replaced parts, or components
must comply with environmental restrictions without polluting the
soil, air or water.
Ensure that any timber and cardboard used as packaging is disposed
of in a safe and environmentally responsible manner.
Where possible, dispose of all waste products i.e. oils, metals, plastic
and rubber products by using an approved recycling service centre.

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3 INSTALLATION
3.1 General Warnings
These instructions have been designed to assist users of the ELD V2 relay with installation.
Before the ELD V2 relay can be installed, there are a number of things that need to be considered and
understood to prevent incorrect or unsafe operation of the relay or the system into which it is installed.
Along with relevant competence, and an understanding of the target application, the following points
should be considered:
3.1.1 Ensure that the information provided in this user manual is fully understood.
It is extremely important that the limitations and functionality of the ELD V2 relay are understood to
prevent incorrect installation and use from creating a potentially dangerous risk. If in doubt as to the
nature of the limitations or their implication, consult a competent authority such as a supervisor or
Ampcontrol technical representative.
3.1.2 Ensure that the application into which the relay is being installed has been properly
defined, designed and approved.
Any system intended to mitigate the risk of injury needs to be properly designed and implemented. Such
a system must be the result of structured risk analysis with the outcomes used to define the system
requirements. These requirements, in turn, will guide the choice of instrumentation, logic solvers and
actuators needed to implement the system. Understanding the needs of the system will ensure proper
selection of equipment.
3.1.3 Ensure that the ELD V2 relay will properly perform the required functions within the system
design.
It is important to understand how the relay is intended to interact with other equipment within a system.
For safe and reliable use, it is crucial that neither the ELD V2’s logical operation nor its signalling be
compromised by incompatibilities with connected equipment.
3.1.4 Modifications of any form to the relay are prohibited.
The ELD V2 relay as supplied has been designed and manufactured to comply with the requirements of
protection standards. If modifications of any form are made to the relay, the equipment may no longer be
fit for use. If any modifications or damage to the relay is evident, do not use the equipment and contact
Ampcontrol for advice.
3.2 Mandatory Installation Practices
The following information must be adhered to when installing the ELD V2 relay. Failure to adhere to this
information may give rise to unsafe operation.
Using the relay in a manner that exceeds its electrical, functional or physical specifications, or in a way
that is contrary to its operating restrictions, may create risks to personnel and/or equipment resulting in
injury or death.
The ELD V2 relay must be powered within the specified voltage range.
The installation of the relay must be carried out by suitably trained and qualified personnel.
Identification labels fixed to the relay must not be damaged, removed or covered before, during or
after installation.
The installation is to be in accordance with the relevant installation Standards/Codes of Practice.

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Modifications must not be made to any part of the relay. As supplied, the unit is built to, and
complies with the relevant standards. Modifications to its construction will render the unit non-
compliant.
Complete and accurate records of the installation must be kept as part of the site installation.

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4 OVERVIEW OF EARTH LEAKAGE PROTECTION
Earthing of electrical equipment, associated machinery and structures is a seemingly simple practice and
is covered adequately by the various applicable sections of Australian Standards AS3000 or AS3007.
However, in the mining industry earthing is somewhat more complex than normal domestic or
commercial applications and requires other factors to be taken into consideration, particularly where
trailing and/or reeling cables supply mobile electrical equipment. The protection systems are designed to
provide touch and step potentials of 50V or less when all the systems are used collectively.
It should be clearly understood that unless all four types of protection is incorporated in any design, then
personal protection (touch and step potentials of 50V or less) will need to be assessed by a competent
person or authority.
The protection systems that cover coal, shale mines and metalliferous mining are detailed in AS/NZS
2081:2011.
The above standard does not stand-alone and has been developed in coordination with other standards
being:
AS1740 –Underground mining substations.
AS1802, AS1300 - Reticulation, trailing and reeling cables.
AS1299, AS1300 - Plugs, adaptors, couplers and receptacles.
AS/NZS 4871 –Electrical Equipment For Mines And Quarries
Internationally accepted voltage/time effects on the human body based on IEC479.
Instructions for installation in accordance with accepted State and Federal Regulations.
Equipment maintained in accordance with industry standards.
4.1 Overview of Protection Problems
Unless properly controlled the occurrence of an earth fault can be hazardous because it may cause:
Frame to earth voltages dangerous to personnel.
Electric arcing, which may initiate an explosion or fire when arcing occurs in an underground
mining operation.
CAUTION!
The main purpose of earth fault protection is to safeguard personnel and
electrical apparatus. However it is found that relays designed to operate on
fault limited systems are not suitable for direct personal protection, i.e.
users of portable drills, grinders etc, which require trip levels of 20-30mA,
with instantaneous operation. (Refer AS/NZS 3190).
The most common apparatus faults in mining applications are cable faults. Cables are most susceptible
to damage and are the major source of dangerous electrical incidents. This applies particularly to the
flexible trailing cables supplying power to mobile mining machines.
Cable construction is such as to provide every phase conductor with an individual conductor screen so
that crushing would cause a low single phase to earth fault current. The protective device, such as an
Ampcontrol ELD earth leakage relay, would then isolate the cable and contain the sparking within the
cable before a heavy short circuit current due to a phase to phase fault occurs.
Earth fault protection has been applied with considerable success in limiting faults and providing quick
disconnection of electrical apparatus from the supply in the event of earth fault situations.

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A definite time operating characteristic is provided with adjustable trip sensitivity and time delay.
Time delay between protective units is introduced to allow the unit close to the fault to isolate the faulty
circuit without causing the healthy part of the system to be de-energised.
4.2 Earth Leakage Systems
Desirable though it may be, it is impractical to provide automatic protection against electrocution as a
result of direct contact with a live conductor, particularly where the electrical reticulation is exposed to a
humid or damp atmosphere.
The table below (taken from IEC Standards) indicates the current values affecting human beings.
Current mA
Symptom
1 or less
Causes no sensation - not felt
1 to 8
Sensation of shock, not painful, individual can let go at will, as muscular
control is not lost
8 to 15
Painful shock, individual can let go at will, as muscular control is not lost
15 to 20
Painful shock, muscular control of adjacent muscles lost, cannot let go
20 to 50
Painful, severe muscular contractions, breathing difficult
50 to 100
(possible)
100 to 200
(certain)
Ventricular fibrillation (a heart condition that may result in death)
200 and over
Severe burns, severe muscular contractions; so severe that chest
muscles clamp the heart and stop it for the duration of the shock (this
prevents ventricular fibrillation).
It can be seen from the previous table that the passage of a current of as low as 15mA through the
human body can cause loss of muscular control to the extent of preventing the recipient from
disengaging from the live conductor. Whereas a current in excess of 50mA is sufficient to produce a
critical heart condition from which there is little or no chance of recovery.
It follows that as an effective safeguard against electrocution resulting from direct contact with a live
conductor, it would be necessary to introduce earth leakage protection designed to operate with a fault
current below 15mA, which in the majority of cases, would be impractical.
The automatic protection of circuits is not intended to take the place of sound installation practice and
the regular maintenance and testing of electrical apparatus.
Care must be taken in the selection and installation of all electrical equipment with due regard to its
required duty and the conditions under which it may be called upon to operate.
Where automatic earth leakage protection has been installed it is essential that its operation be tested
often, and to facilitate this, a means for testing is incorporated in all approved earth leakage relays.
4.3 Methods of Earth Leakage Protection
Earth Leakage Protection Relays for use in mining applications have to be designed and tested to
AS/NZS 2081:2011 for use on fault limited systems.
There are two methods of protection used, Core Balance and Series Neutral earth leakage protection
systems. A relay installed in Core Balance applications performs the primary protection in an installation,
protecting the outlet supplying power to a machine. In this application the time delay is set at
instantaneous. Series Neutral earth leakage provides backup protection for the installation and can have
a time delay up to a maximum of 500mS.

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4.3.1 Core Balance Protection
With this method all three phases of the cable are passed symmetrically through the toroid. If there is no
earth fault present, the vector sum of the currents in a three-phase supply is zero. If current from any
phase flows to earth the toroid flux becomes unbalanced. The toroid produces an output, which trips the
relay.
A test current is injected through the window of the toroid to test the operation of the relay.
4.3.2 Series Neutral Protection
With this method the neutral is passed through the toroid. An earth fault on any of the phase conductors
causes an earth current which returns, through the toroid, to the star point of the transformer.
A test circuit can connect a test resistor between a phase and earth or inject a current through the toroid
as previously described. The test resistor to earth method is recommended with this type of protection as
this test also proves the neutral to earth connection.
4.4 Earth Leakage Toroids
Toroids (current transformers) are not ideal devices and if correct procedures are not followed during
installation, nuisance tripping can result. If, for example, we consider a single-phase earth leakage
system where active and neutral pass through a toroid then at all times currents in the two wires are
equal and opposite so that the net current through the toroid is zero. An ideal current transformer would
have all of the flux from each wire contained in the core and so would accurately add the opposing fluxes
to get a net result of zero. A real current transformer has “leakage fluxes”. This means that a very small
proportion of the total flux from each cable is not contained in the core but in the space outside it and as
a result it may link some turns but not others, depending on the positioning of the cables. The effect of
this is that a small output may be obtained from the toroid where none would arise if the device were
ideal.
The size of the error may vary from toroids of the same type because of slight differences in the core and
the symmetry of the winding. Problems caused in this way increase as the toroid size increases, as
currents increase and symmetry decreases. Nuisance tripping tends to occur when the total current
rises, such as when a large motor is started. The following guidelines would help to avoid such
problems.
4.4.1 Toroid Selection
i. Select the smallest internal diameter toroid, which will allow the cables to fit through. Avoid very
large toroids (200mm) or toroids with square apertures.
ii. Only use approved toroids specified by Ampcontrol as these have been designed to minimise the
problem.
4.4.2 Toroid Installation Guidelines
i. Keep cables as close to the centre of the toroid as possible. Do not tie them to one side of the
toroid. Remember to aim for symmetry.
ii. Do not bring the cables back past the toroid within one diameter of the toroid. Trying to cram
cables into a small space reduces symmetry and may lead to problems which are difficult to
solve.
iii. Avoid placing the toroid near any device which produces magnetic fields. This includes busbars,
transformers or other cables. Try to maintain several toroid diameters clearance.
iv. Many small cables tend to be worse than three larger ones. Try to position the toroid in the circuit
with this in mind.
v. Toroids used for core balance earth leakage protection cannot have busbars passed through the
toroid.
vi. To prevent possible nuisance tripping it is suggested that the conductor screen of the earth
leakage toroid should be earthed at the relay end only. If both ends are earthed the possibility

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exists for the shield to become an earth loop, having finite resistance and injecting noise into the
toroid leads.
vii. To reduce the possibility of noise pickup, install twisted pair cable between the ELD relay and the
toroid.
CAUTION!
The ELD relay includes a circuit for continually testing the toroid
connection. The resistance of the wiring between the relay and toroid must
be kept below 1ohm. If this is not done then a “CT” fault will be detected
and the relay will trip.

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5 COMMISSIONING AND CALIBRATION
Prior to being put into service, the electrical protection system must be correctly commissioned. This
manual does not cover system commissioning; the full scope of commissioning tests should be
determined during the risk assessment or FMEA covering the design of the electrical protection system.
The following test can provide guidance on checking the correct operation of the ELD during
commissioning. This is not intended to provide an exhaustive commissioning checklist, but should be
considered to be a minimum set of tests.
5.1 Earth Leakage Test
A test current is injected through the window of the toroid to test the operation of the relay. See section
6.3.2 for instruction on resetting the ELD relay following a fault or a test.

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6 ELD V2 OPERATION AND TESTING
The Ampcontrol ELD V2 Earth Leakage Relay is electronic in design and is based on microprocessor
technology. The ‘Healthy’ LED flashes to indicate correct operation of the microprocessor. The relay
uses a toroid to measure earth fault current. A definite time operating characteristic is provided with
adjustable trip sensitivity and time delay. When a fault occurs and the trip level and time delay is
exceeded the relay’s trip function is activated, which operates the trip contacts connected in the system
control circuit. The ‘Trip’ LED is on when a trip occurs. The trip condition is latched in non-volatile
memory and requires operation of the reset input to clear the trip condition. An internal reset is also
provided on the fascia of the relay. The ‘Relay’ LED is on to indicate the relay is energised.
A ten-segment LED bar graph indicates the percentage of leakage level being detected. This reading
can be remotely monitored/displayed using the 4-20mA output of the relay. When the relay measures
currents with frequencies much greater than 50Hz, the bar graph LED fast flashes (5Hz) instead of being
steady. Should the high frequency current persist until the time delay is exceeded the relay will trip and
the ‘Har.Trip’ LED (Harmonic Trip) will be illuminated.
The ELD V2 Earth Leakage Relay is housed in a stainless steel case and can be either ‘DIN Rail’ or
‘Panel’ mounted through a 69 x 39mm cut out. When panel mounted the front of the ELD relay is
designed to provide IP56 ingress protection. There is provision to prevent unauthorised adjustment of
the trip settings by sealing the post (in front of the knurled nut) with a lead seal, thus inhibiting the
unauthorised removal of the front fascia cover.
An internal switch mode power supply allows the ELD to operate from 32VAC to 110VAC or 20VDC to
185VDC.
The ELD V2 Relay has been designed and tested for use on fault-limited systems. To ensure maximum
protection the earth leakage system should be used in conjunction with the other protection systems
covered by AS/NZS 2081. The collective systems are designed to limit touch and step potentials.
The relay is also suitable for industry where equipment or system earth leakage protection is required.
The relay is not suitable for personal protection, which requires trip levels of 20-30mA, with
instantaneous operation. (Refer AS/NZS 3190).
The ELD relay continually monitors the toroid and if the connection is lost the relay will trip and flash the
‘CT Fault’ LED.
CAUTION!
The ELD relay includes a circuit for continually testing the toroid
connection. The resistance of the wiring between the relay and toroid must
be kept below 1Ω. If this is not done then a CT fault will be detected and the
relay will trip.
6.1 Methods of Earth Leakage Protection
The ELD V2 Relay is suitable for the two methods of protection used. They are the Core Balance and
Series Neutral earth leakage protection systems. (See Section 4.3, Methods of Earth Leakage
Protection, for details).

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6.2 Mechanical Arrangement
6.2.1 Enclosure
The ELD is housed in a plastic and stainless steel enclosure and is rated as IP20. The ELD enclosure is
designed to be either DIN rail or Panel mounted. The dimensions are shown in Figure 1 below:
Figure 1: ELD enclosure dimensions –Panel mounted (top) and DIN rail mounted (bottom) options
6.2.2 Front Panel
The front fascia of the ELD V2 relay consists of a two switches for selection of the Trip Level and Delay
Time, five (5) indication LEDs for diagnostics support and a ten-segment LED bar graph to display the
level of Earth Leakage current being measured. Figure 2 shows the front fascia of the relay.
Figure 2: ELD V2 Front Fascia

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6.3 Electrical Connections
Once the ELD relay has been mounted in a suitable location, it is necessary to wire it correctly.
Figure 3 shows a typical wiring diagram for the application of the ELD relay.
Figure 3: ELD Typical Electrical Application
6.3.1 Supply
The ELD V2 relay is able to operate across both AC and DC voltages ranges. The supply voltage can be
32-110VAC +/- 20% at 50Hz, or 20-185VDC.
6.3.2 Reset
To reset the relay: press the button located on the fascia 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.
6.3.3 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.

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7 OPERATION SUMMARY
7.1 Rotary Switches Configuration
7.1.1 Trip Level selection
The trip level can be selected via one of the rotary switches at the front of the unit. The trip level
represents the threshold of current measured by the earth leakage toroid, above which a trip condition
occurs. Trip level settings can be selected from 100 to 2500mA.
7.1.2 Time Delay selection
The time delay can be selected via one of the rotary switches at the front of the unit. The trip time
represents the delay after which a trip condition has occurred when the ELD relay will de-energise.
The settings for the time delay are <50 to 500ms.
7.2 Indication LEDs
7.2.1 Healthy LED
LED state
Indication
Off
Power Off; microprocessor not operating correctly
Flashing
Microprocessor is correctly operating
On
N/A
7.2.2 Trip LED
LED state
Indication
Off
Relay is healthy
Flashing
N/A
On
Relay has tripped due to a fault condition
7.2.3 Relay LED
LED state
Indication
Off
Relay is not energised
Flashing
N/A
On
Relay is energised
7.2.4 Har. Trip LED
LED state
Indication
Off
High frequency currents not being measured.
Flashing
N/A
On
High frequency current measured for a period exceeding the time delay.
7.2.5 CT Fault LED
LED state
Indication
Off
Earth Leakage toroid connection healthy
Flashing
Connection lost to the Earth Leakage toroid
On
N/A
7.3 Mode of Operation
To comply with AS/NZS 2081:2011 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.

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8 SERVICE, MAINTENANCE & DISPOSAL
8.1 Equipment Service
The ELD V2 relay requires no internal servicing during its normal operating life. A number of external
system based checks should however be completed on a regular basis. These ‘routine inspections’ must
be carried out by suitably trained people with knowledge of the relay and the systems into which it is
fitted. Routine inspections may take the form of either visual-only checks, or visual and ‘hands-on’
checks.
8.1.1 Visual Only Inspections
A basic visual inspection focuses on looking at the installation for signs of physical damage, water or
dust ingress and the condition of cables and labels. This type of inspection may involve opening cabinets
to gain access to the ELD V2 relay and other equipment. This level of inspection may also include
cleaning display windows that have become obscured by dirt.
Observations would typically be:
Check that equipment enclosures, cable trays, conduits, etc. are in good order with no physical
damage.
Check that sealed wall boxes are free from water and dust ingress internally. Door seals are in
good condition.
Check that connected cables are free from cuts, abrasions and obvious signs of damage. Cable
restraints are in good order and correctly fitted.
Check that labels on equipment, wall boxes and cables are present and in good condition
(especially certification labels).
Check that no modifications have been carried out to installed equipment.
8.1.2 Hands-On (Detailed) Inspections
A more detailed inspection would include all of the elements of a visual inspection, plus some checks
that cover the integrity of connections, fixtures and fittings.
In addition to basic visual observations, more detailed integrity checks would involve:
Verify that equipment housings, wall boxes and other mechanical fixtures are secured in place.
This includes terminal box lids, tightness of cable glands, integrity of wall-box mountings, security
of equipment fixing to walls/DIN rails etc.
Verify all electrical connections are secure with no loose screw terminals or DIN rail terminals not
fitted to rails etc.
8.2 Equipment Maintenance
WARNING!
The ELD V2 relay has no user-serviceable parts. All repairs must be
carried out by Ampcontrol only. If a fault develops, return the relay
to Ampcontrol for repair. It is essential that no attempt be made to
repair the relay as any attempt to dismantle or repair the relay can
seriously compromise the safety of the unit.

ELDB006R9 15/07/2015 17:44 Page 19 of 21
Ampcontrol Electronics
ELDB006R9 ELD V2 USER MANUAL
Rev 9 –03/14, ECN: 10573
8.3 Disposal
The electronic equipment discussed in this manual must not be
treated as general waste. By ensuring that this product is disposed
of correctly you will be helping to prevent potentially negative
consequences for the environment and human health which could
otherwise be caused by incorrect waste handling of this product.

ELDB006R9 15/07/2015 17:44 Page 20 of 21
Ampcontrol Electronics
ELDB006R9 ELD V2 USER MANUAL
Rev 9 –03/14, ECN: 10573
9 SPECIFICATIONS
Supply Voltage
Voltage
32-110VAC +/- 20%, 50Hz
20-185VDC
Power Consumption
< 3W
Relay Contacts
Contacts
1 x NO / 1 x CO
Ratings
1.6A, 400VA
Relay to Toroid
< 1Ω
The above table relates to the latest version of the ELDV2 relay,
designed and tested to AS/NZS 2081:2011, Section 6. While the relay
itself has not changed, the relay output limits are different to previous
versions of the relay to ensure compliance with the 2011 version of
the standard.
4-20mA Output
4-20mA Output
The ‘Loop Powered’ current represents the leakage current as a % of the trip level.
4mA => 0% leakage, 20mA => 120% leakage (100% = 17.33mA)
Max. Loop Resistance
[Vs-10] x 50, where Vs must be greater than 10VDC and less than 30VDC
Accuracy
+/- 2% of full scale
Mechanical
Dimensions
77x47x116mm
IP Rating
IP56 (when panel mounted)
Trip and Time Delay Settings
Switch Position
Trip Level mA
Time Delay mS
0
100
<50
1
150
100
2
200
150
3
250
200
4
300
250
5
350
300
6
400
350
7
450
400
8
500
450
9
750
500
A
1000
500
B
1250
500
C
1500
500
D
1750
500
E
2000
500
F
2500
500
WARNING!
The above table relates to Version 2 of the ELD relay, designed and
tested to AS/NZS 2081:2011, Section 6. Positions 9 to F differ to
previous relay versions to ensure compliance to the latest standard.
Verify you have the correct relay by checking that ‘V2’ is printed on
the fascia before selecting positions 9-F from this table.