Ampcontrol MAG-153 User manual

Version: 7, JULY 2023
Designed and manufactured in Australia by Ampcontrol Pty Ltd
ELV
EARTHLEAKAGEPROTECTIONRELAY
UserManual

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ELV USER MANUAL
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WARNING!
The warning symbol highlights a potential risk of injury or death.
Please share these warnings with other operators.
CAUTION!
The caution symbol highlights a potential risk of damage to
equipment.
Please share these cautions with other operators.
NOTE
The note symbol highlights key information.
Please share these notes with other operators.
ENVIRO
The enviro (environmental) symbol highlights areas which may have an
impact on the surrounding fauna and/or flora.

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Copyright Notice
The Ampcontrol ELV 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
Thank you for purchasing the Ampcontrol ELV Relay.
WARNING!
In the interests of safety and correct equipment operation, please
take the time to read and understand the content in this manual.
Ampcontrol Contact Details
7 Billbrooke Close, Cameron Park, NSW, 2285
P [phone] | F [phone]
EMAIL: [email protected]
WEB: ampcontrolgroup.com

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TABLE OF CONTENTS
1 SAFETY AND OTHER WARNINGS ...................................................................................................6
1.1 Safe Use of Equipment................................................................................................................6
2 RECEIVING AND STORAGE .............................................................................................................7
2.1 Receiving.....................................................................................................................................7
2.2 Inspection ....................................................................................................................................7
2.3 Storage after Delivery..................................................................................................................7
2.4 Unpacking of Equipment .............................................................................................................7
3 PRODUCT OVERVIEW......................................................................................................................8
3.1 ELV Earth Leakage Relay ...........................................................................................................8
3.2 Accessories ...............................................................................................................................10
4 INSTALLATION.................................................................................................................................13
4.1 General Warnings......................................................................................................................13
4.2 Mandatory Installation Practices................................................................................................13
4.3 ELV Relay Mechanical Installation Information .........................................................................14
4.4 Toroid Mechanical Installation Information................................................................................15
4.5 Electrical Installation Information...............................................................................................17
5 COMMISSIONING AND CALIBRATION...........................................................................................19
5.1 Earth Leakage Test ...................................................................................................................19
6 PRODUCT OPERATION ..................................................................................................................20
6.1 Frequency Response Selection.................................................................................................20
6.2 Configuration of Trip Level and Trip Time .................................................................................21
6.3 Resetting the ELV Relay ...........................................................................................................22
6.4 ELV Relay Indicators.................................................................................................................22
6.5 CT Fault Protection....................................................................................................................23
6.6 Fail Safe Operation....................................................................................................................23
7 SERVICE, MAINTENANCE & DISPOSAL........................................................................................24
7.1 Equipment Service ....................................................................................................................24
7.2 Equipment Maintenance............................................................................................................25
7.3 Disposal.....................................................................................................................................25
8 SPECIFICATIONS ............................................................................................................................26
9 SETTINGS QUICK REFERENCE GUIDE ........................................................................................27
10 EQUIPMENT LIST ..........................................................................................................................27
10.1 Relay .......................................................................................................................................27
10.2 Toroids.....................................................................................................................................27
10.3 Accessories .............................................................................................................................28
APPENDIX A: EARTH LEAKAGE PROTECTION REQUIREMENTS .................................................29

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A1 Australian Standards for Earth Leakage (Mining Industry).........................................................29
A2 Overview of Protection Problems...............................................................................................30
A3 Earth Leakage Systems.............................................................................................................31
A4 Earth Leakage Protection and Variable Speed Drives...............................................................32
A5 Methods of Earth Leakage Protection........................................................................................34
A6 Earth Leakage Toroids...............................................................................................................34
APPENDIX B: THE REQUIREMENT OF WEIGHTED WIDEBAND MODE ........................................36
B1 Earth Leakage Requirements from AS/NZS 4871 & AS/NZS 2081...........................................36
B2 Wideband Earth Leakage Protection .........................................................................................37
B3 Weighted Wideband Earth Leakage Protection .........................................................................38
APPENDIX C: SIL CERTIFICATE OF CONFORMITY ........................................................................40
TABLE OF FIGURES
Figure 3.1: Ampcontrol ELV Earth Leakage Relay...................................................................................8
Figure 3.2: Core Balance and Series Neutral Installation Types..............................................................9
Figure 3.3: EL500S Toroid Series..........................................................................................................10
Figure 3.4: DIN Rail Mounting Kit (Suit ELM / ELD / ELV).....................................................................10
Figure 3.5: Lockable Cover (Suit ELM / ELD / ELV Relay) ....................................................................11
Figure 3.6: ELCF Adaptor (Suit ELM / ELD / ELV Relay) ......................................................................11
Figure 3.7: ELF Adaptor (Suit ELM / ELD / ELV Relay).........................................................................12
Figure 4.1: ELV Enclosure Dimensions –Panel Mounted (Top) and DIN Rail Mounted (Bottom).........14
Figure 4.2: EL500S/25 Toroid (115437) Dimensions.............................................................................15
Figure 4.3: EL500/60 Toroid (101649) Dimensions ...............................................................................15
Figure 4.4: EL500S/60 Toroid (101658) Dimensions.............................................................................16
Figure 4.5: EL500S/112 Toroid (101656) Dimensions...........................................................................16
Figure 4.6: ELV Relay Typical Connection Diagram..............................................................................17
Figure 5.1: Earth Leakage Test Circuit...................................................................................................19
Figure 6.1: Frequency Response Configuration.....................................................................................20
Figure 6.2: ELV Relay Fascia Operators................................................................................................21
Figure 6.3: Trip Level and Trip Time Settings........................................................................................21
Figure 6.4: ELV Relay Fascia Operators................................................................................................22
Figure 6.5: Functionality of ELV Relay Indicator LEDs ..........................................................................22

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1 SAFETY AND OTHER WARNINGS
For safety reasons, the ELV Earth Leakage Relay must be installed, operated and serviced only by
competent personnel. Please 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 designed and manufactured to ensure safe operation. The equipment
must only be used within the design parameters.
The instructions within this manual must be observed as an aid towards achieving the safest possible
installation.
Persons responsible for installation, maintenance, or operation, must observe 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, please read and understand this manual prior to use. Competency based
training courses are recommended and are available on request.
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 ELV 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 ELV Relay functioning correctly it is highly recommended that all safety
functions of the ELV 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 loading. If there is
evidence of physical damage, notify Ampcontrol immediately.
Notify Ampcontrol immediately in case of any discrepancies to the packing list. Keep a record of any
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, retain and store any approval documentation
for your safety file as applicable prior to wrapping being 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 between 0-40 ˚C, preferably on shelves and protected from
moisture and sunlight.
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.
ENVIRO
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 PRODUCT OVERVIEW
3.1 ELV Earth Leakage Relay
The Ampcontrol ELV Earth Leakage Relay is electronic in design and is based on microprocessor
technology. It is designed to AS/NZS 2081:2011 Section 6.
The ELV Relay uses patented technology (AU2011264414) to characterise earth leakage currents giving
superior fault discrimination, particularly in applications involving switching power electronics and
variable speed drives.
The earth fault current is measured using a toroid, with the trip time and trip threshold being able to be
independently adjusted using selectors on the relay fascia. When a fault occurs and the trip level and
time delay is exceeded the relay’s trip function is activated. A trip will de-energise the trip contacts
connected in the system control circuit. 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.
A ten-segment LED bar graph indicates the percentage of leakage level being detected. This reading
can be remotely monitored/displayed using the 4-20 mA output of the relay.
The user has the ability to switch the relay between wideband (up to 10 kHz), narrowband (power
frequency) and weighted frequency mode (up to 10 kHz, high frequency compensated).
The ELV 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 ELV Earth Leakage 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 or the use of a padlocked
cover (see the equipment list for part number), thus inhibiting the unauthorised removal of the front
fascia cover.
An internal switch mode power supply allows the ELV Relay to operate from 24VAC to 110VAC or
24VDC to 150VDC.
Figure 3.1: Ampcontrol ELV Earth Leakage Relay

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The ELV Relay is suitable for both core balance and series neutral methods of protection.
Figure 3.2: Core Balance and Series Neutral Installation Types
The ELV Earth Leakage 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 20-30 mA, with
instantaneous operation (refer to AS/NZS 3190).
The ELV Earth Leakage Relay continually monitors the toroid and if the connection is lost the relay will
trip and flash the ‘CT Fault’ LED.
A B C
A B C
To Supply
To Load
N
NER
To Supply Neutral
To NER
Core Balance Installation Series Neutral Installation
EL500S
Toroid EL500S
Toroid

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3.2 Accessories
3.2.1 Earth Leakage Toroids
The ELV Relay requires a separately purchased EL500S toroid for measurement of the earth leakage
current. EL500S toroids are available in the following window sizes: 25 mm, 60 mm & 112 mm (refer to
Section 4.4 for dimensional details).
Figure 3.3: EL500S Toroid Series
3.2.2 DIN Rail Mounting Kit (Part Number 101399)
The ELV Relay is designed to be panel mounted, however a DIN rail mounting kit can be separately
purchased.
Figure 3.4: DIN Rail Mounting Kit (Suit ELM / ELD / ELV)

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3.2.3 Lockable Cover (Part Number 164672)
A separately purchasable Lockable Cover is available to install over the fascia of the ELV Relay. This
can be used to prevent earth leakage resets being performed by unauthorised personnel.
Figure 3.5: Lockable Cover (Suit ELM / ELD / ELV Relay)
3.2.4 ELCF Adaptor (Part Number 120255)
This accessory allows users of the obsolete ELCF Earth Leakage Relay to upgrade to Ampcontrol’s
next generation of earth leakage relays. The ELCF Adaptor seals the larger hole left by the ELCF
Relay and provides a mounting point for the ELV Relay.
Figure 3.6: ELCF Adaptor (Suit ELM / ELD / ELV Relay)

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3.2.5 ELD / ELV / ELM Service Kit (Part Number 179513)
This kit includes all loose components used in the ELD / ELV / ELM Relays.
•1x Clear Front Window Cover
•2x Window Thumb Nuts
•2x Mounting Clips with Screws
•1x Facia Gasket
3.2.6 BRAMCO ELF Adaptor (Part Number 175279)
This adaptor kit allows users of the BRAMCO ELF and ELF2 Relays to transfer to Ampcontrol’s next
generation of earth leakage relays. The ELF Adaptor seals the larger hole (90 x 90 mm) left by the ELF
Relay and provides a mounting point for the ELV Relay.
Figure 3.7: ELF Adaptor (Suit ELM / ELD / ELV Relay)

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4 INSTALLATION
4.1 General Warnings
These instructions have been designed to assist users of the ELV Relay with installation.
Before the ELV 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:
4.1.1 Ensure that the information provided in this user manual is fully understood.
It is extremely important that the limitations and functionality of the ELV 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.
4.1.2 Ensure that the application into which the ELV 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.
4.1.3 Ensure that the ELV Relay will properly perform the required functions within the
system design.
It is important to understand how the ELV Relay is intended to interact with other equipment within a
system. For safe and reliable use, it is crucial that neither the ELV Relay logical operation nor its
signalling be compromised by incompatibilities with connected equipment.
4.1.4 Modifications of any form to the ELV Relay are prohibited.
The ELV 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 ELV Relay, the equipment may no
longer be fit for use. If any modifications or damage to the ELV Relay is evident, do not use the
equipment and contact Ampcontrol for advice.
4.2 Mandatory Installation Practices
The following information must be adhered to when installing the ELV Relay. Failure to adhere to this
information may give rise to unsafe operation.
Using the ELV 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 relay must be powered within the specified voltage range.
•The voltage and current ratings of the relay’s output contacts must be observed.
•The 4-20 mA Output Signal circuit must adhere to the parameters stated in the specifications.
•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
4.3 ELV Relay Mechanical Installation Information
The ELV Relay is housed in a plastic and stainless-steel enclosure and is rated as IP20. The ELV Relay
enclosure is designed to be either DIN rail or Panel mounted. The dimensions are shown in Figure 4.1
below.
Figure 4.1: ELV Enclosure Dimensions –Panel Mounted (Top) and DIN Rail Mounted (Bottom)
4.3.1 Panel Mounting
The required cut out for panel mounting is 69w x 39h (mm).
When panel mounted correctly using the supplied gasket, the ELV Relay will have a fascia IP rating of
IP56.
4.3.2 DIN Rail Mounting
A separately purchasable mounting kit is available for mounting the ELV Relay onto a DIN rail. See the
equipment list in Section 10.

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4.4 Toroid Mechanical Installation Information
The ELV Relay uses the below approved EL500 and EL500S toroid range. This is available in three
window sizes: 25 mm, 60 mm & 112 mm.
4.4.1 EL500S/25 (Part Number 115437)
The EL500S/25 toroid has a 25 mm window and is DIN rail mounted.
Figure 4.2: EL500S/25 Toroid (115437) Dimensions
4.4.2 EL500/60 (Part Number 101649)
The EL500/60 toroid has a 60 mm window and is panel mounted.
Figure 4.3: EL500/60 Toroid (101649) Dimensions
NOTE
Only the later EL500 toroid is suitable. This is denoted by the "N"
designator at the end of the core type. For this toroid is it W-20N.

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4.4.3 EL500S/60 (Part Number 101658)
The EL500S/60 toroid has a 60 mm window and is panel mounted.
Figure 4.4: EL500S/60 Toroid (101658) Dimensions
4.4.4 EL500S/112 (Part Number 101656)
The EL500S/112 toroid has a 112 mm window and is panel mounted.
Figure 4.5: EL500S/112 Toroid (101656) Dimensions

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4.5 Electrical Installation Information
Figure 4.6: ELV Relay Typical Connection Diagram
4.5.1 CT-SIG & CT-COM Connections (Terminals 1 & 2)
These terminals are for the connection of the ELV’s earth leakage toroid.
The ELV Earth Leakage Relay is designed for use with Ampcontrol EL500S series 100:1 Toroids. They
are available with window sizes 25, 60, & 112 mm. These allow trip settings from 30 mA to 2.5 A.
CAUTION!
The wires connecting the ELV Relay and the earth leakage toroid
should be run in a twisted pair and must have a loop resistance of
less than 1Ω.
NOTE
When installing the wideband EL Relays on an outlet with VSD or VVVF
drive, it is recommended that the relays toroid be installed on the cables
before the drive. This will allow the relay to provide EL protection that
includes the drive itself.
4.5.2 Earth Connection (Terminal 3)
This terminal is for the connection of the earth to the ELV Relay.
Non Fail Safe Link
(NOT USED)
ELV
10 NC-2
9COM-2
8NO-2
COM-1
NO-1
PWR2
PWR1
EARTH
CT-COM
CT-SIG
4-20mA +
18
4-20mA -
RESET +
RESET -
15
NON-FS1
14
NON-FS2
LINK-3
LINK-2
LINK-1
Wideband Mode
Narrowband Mode
13
12
11
External Reset
Pushbutton
17
16
+
_10-30Vdc
19
Analogue Input
Device
To Main Contactor
Tripping Circuit
To Indication
Circuit
7
6
5
4
24-110Vac
To Load
Main
Contactor
3
EL Test
Circuit 2
1
Alternative
Toroid Position
PWR2
PWR1
Alternative
Power Supply
5
4
24-168Vdc
-
+
Loop Resistance < 1Ω
Toroidal Current
Transformer
Incoming
Supply

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4.5.3 PWR1 & PWR2 Connections (Terminals 4 & 5)
These terminals are for the connection of the control supply for the ELV Relay.
The ELV Relay is able to operate across both AC and DC voltages ranges. The supply voltage can be
24-110 VAC +/- 20 % at 50 Hz, or 24-168 VDC +/- 10 %.
4.5.4 NO-1 & COM-1 Connections (Terminals 6 & 7)
These terminals provide a normally open contact that can be wired into control or indication circuits.
The output relay will be energised (closed) whilst the ELV Relay is healthy and will de-energise when
the ELV Relay is in the tripped state.
4.5.5 NO-2, COM-2 & NC-2 Connections (Terminals 8, 9 & 10)
These terminals provide a changeover open contact that can be wired into control or indication circuits.
The output relay will be energised whilst the ELV Relay is healthy and will de-energise when the ELV
Relay is in the tripped state.
4.5.6 LINK-1, LINK-2 & LINK-3 Connections (Terminals 11, 12 & 13)
These terminals allow the user to configure the frequency response of the ELV Relay.
To set the frequency response to Narrowband, bridge LINK-1 to LINK-2. Leave LINK-3 unconnected.
To set the frequency response to Wideband, bridge LINK-2 to LINK-3. Leave LINK-1 unconnected.
To set the frequency response to Weighted, bridge LINK-1 to LINK-3. Leave LINK-2 unconnected. If no
links are bridged the ELV Relay will default to this mode.
4.5.7 NON-FS1 & NON-FS2 Connections (Terminals 14 & 15)
These terminals are not used and are not to be connected.
In order to comply with the failsafe requirements of AS 2081:2011, the option to run in non-failsafe
mode was not implemented in the ELV Relay.
4.5.8 RESET- & RESET+ Connections (Terminals 16 & 17)
These terminals are for the connection of the external reset pushbutton.
A tripped ELV Relay can be reset two ways; by pressing the reset button located on the front fascia or
via an external normally open (NO) contact connected to the ELV Relay terminals labelled “Ext Reset”.
If an external reset is used, it is recommended that a twisted pair be used between the N/O contact and
the reset input.
4.5.9 4-20 mA- & 4-20 mA+ Connections (Terminals 18 & 19)
These terminals provide a 4-20 mA analogue output that indicates the earth leakage current as a
percentage of the trip level.
The current output of 4 mA represents an earth leakage current of 0 % of the trip level (no earth
leakage) and the current output of 20 mA represents an earth leakage current of 120 % of the trip level.
The 4-20 mA output should be wired as per Figure 4.6.
NOTE
Ampcontrol does not recommend using the 4-20 mA output as the main
tripping signal. All tripping should be carried out by the provided output
relays.

Ampcontrol Pty Ltd –ABN 28 000 915 542
ELV USER MANUAL
MAG-153 Version 7 –JULY 2023
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 19 of 40
APPROVED FOR EXTERNAL DISTRIBUTION –PROPERTY OF AMPCONTROL PTY LTD –NOT TO BE REPRODUCED IN PART
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 ELV Relay 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
Inject a test current at 120 % of the trip level setting through the toroid, as shown in Figure 5.1. Verify
that the ELV Relay trips as expected.
Figure 5.1: Earth Leakage Test Circuit
Non Fail Safe Link
(NOT USED)
ELV
10 NC-2
9COM-2
8NO-2
COM-1
NO-1
PWR2
PWR1
EARTH
CT-COM
CT-SIG
4-20mA +
18
4-20mA -
RESET +
RESET -
15
NON-FS1
14
NON-FS2
LINK-3
LINK-2
LINK-1
Wideband Mode
Narrowband Mode
13
12
11
External Reset
Pushbutton
17
16
+
_10-30Vdc
19
Analogue Input
Device
To Main Contactor
Tripping Circuit
To Indication
Circuit
7
6
5
4
24-110Vac
To Load
Main
Contactor
3
EL Test
Circuit 2
1
Alternative
Toroid Position
PWR2
PWR1
Alternative
Power Supply
5
4
24-168Vdc
-
+
Loop Resistance < 1Ω
Toroidal Current
Transformer
Incoming
Supply

Ampcontrol Pty Ltd –ABN 28 000 915 542
ELV USER MANUAL
MAG-153 Version 7 –JULY 2023
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 20 of 40
APPROVED FOR EXTERNAL DISTRIBUTION –PROPERTY OF AMPCONTROL PTY LTD –NOT TO BE REPRODUCED IN PART
6 Product OPERATION
The following subsections will detail the operation of the ELV Relay. This includes the operation of the
earth leakage protection, rotary switches, output relays and indication LEDs.
6.1 Frequency Response Selection
The ELV Relay can be configured to operate with three different frequency responses: Narrowband,
Wideband and Weighted.
The frequency response of the ELV Relay is set by installing bridges on the LINK terminals on the rear of
the ELV Relay.
Figure 6.1: Frequency Response Configuration
6.1.1 Narrowband Response
When Narrowband is selected the ELV Relay uses a low pass filter to prevent tripping on earth leakage
currents above 50 Hz. In this mode of operation, the ELV Relay behaves like a traditional earth leakage
relay, such as the ELD.
This mode can be activated by bridging links 1 and 2.
6.1.2 Wideband Response
In Wideband mode the ELV Relay does not utilise any frequency discrimination up to 10 kHz.
This mode can be activated by bridging links 2 and 3.
6.1.3 Weighted Response
Utilising a patented technique (AU2011264414) weighted mode provides a scaled earth leakage
response to take into account the reduced sensitivity of the human body to touch potentials at higher
frequencies. This improved frequency discrimination reduces the occurrence of nuisance trips.
This is the default mode and can be activated by bridging links 1 and 3. If no links are bridged the ELV
Relay will default to this mode.
Narrow Wide
Weighted