Page 1
Version: 3, November 2018
Designed and manufactured in Australia by Ampcontrol Pty Ltd
ELV-PRO
EARTH LEAKAGE RELAY
User Manual
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ELV-PRO USER MANUAL
MAG-219 Version 3 – NOV/18
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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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ELV-PRO USER MANUAL
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Copyright Notice
The Ampcontrol Earth Leakage Relay ELV-PRO 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-PRO 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 +61 1300 267 373 | F +61 2 4903 4888
EMAIL: [email protected]
WEB: ampcontrolgroup.com
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ELV-PRO USER MANUAL
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TABLE OF CONTENTS
1 SAFETY AND OTHER WARNINGS .................................................................. 9
Safe Use of Equipment .............................................................................. 9
2 RECEIVING AND STORAGE .......................................................................... 10
Receiving ................................................................................................. 10
Inspection ................................................................................................ 10
Storage after Delivery .............................................................................. 10
Unpacking of Equipment .......................................................................... 10
3 PRODUCT OVERVIEW .................................................................................. 11
Description ............................................................................................... 11
Key Features ........................................................................................... 11
Application ............................................................................................... 11
4 INSTALLATION ............................................................................................... 12
General Warnings .................................................................................... 12
Mandatory Installation Practices .............................................................. 12
Mechanical Installation Information .......................................................... 13
Electrical Installation Information ............................................................. 15
5 PRODUCT OPERATION ................................................................................. 21
Earth Leakage Protection ........................................................................ 21
Earth Leakage Analysis Tool ................................................................... 21
Data Logging ........................................................................................... 22
Real Time Clock (RTC) ............................................................................ 22
IP Configuration ....................................................................................... 23
Protection Settings ................................................................................... 25
ELV-PRO CIP over EtherNet/IP Interface ................................................ 27
ELV-PRO Modbus TCP Interface............................................................. 27
6 OPERATIONAL INTERFACE .......................................................................... 28
ELV-PRO Facia Interface ........................................................................ 28
ELV-PRO Web Interface .......................................................................... 29
7 SERVICE, MAINTENANCE & DISPOSAL ....................................................... 41
Equipment Service ................................................................................... 41
Equipment Maintenance .......................................................................... 42
Disposal ................................................................................................... 42
8 SPECIFICATIONS .......................................................................................... 43
9 EQUIPMENT LIST .......................................................................................... 43
APPENDIX A: MINING EARTH LEAKAGE PROTECTION WITH VARIABLE SPEED
DRIVES .............................................................................................................. 44
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A1 Variable Speed Drives .............................................................................. 44
A2 Improving Protection................................................................................. 46
APPENDIX B: ELV-PRO CURRENT TRANSFORMERS ................................... 47
B1 Earth Leakage Toroids ............................................................................. 47
B2 Toroid selection ........................................................................................ 47
B3 Toroid installation guidelines .................................................................... 47
APPENDIX C: ELV-PRO CIP OVER ETHERNET/IP .......................................... 48
C1 ELEMENTARY DATA TYPES .................................................................. 48
C2 LIVE DATA SEGMENT DEFINITION ....................................................... 49
C3 CONTROLS ............................................................................................. 50
C4 EXPLICIT MESSAGES ............................................................................ 51
C5 EVENT LOGS .......................................................................................... 53
APPENDIX D: ELV-PRO Modbus TCP .............................................................. 55
D1 Modbus Commands ................................................................................. 55
D2 Modbus Status ......................................................................................... 55
D3 Read Modbus Address Table ................................................................... 56
D4 Uint16 Encoded String ............................................................................. 57
D5 Read Modbus Address Table ................................................................... 57
APPENDIX E: ELV-PRO Default Settings .......................................................... 58
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TABLE OF FIGURES
Figure 4-1: ELV-PRO Dimensions .......................................................................................................... 13
Figure 4-2: ELV-PRO Terminal Layout ................................................................................................... 13
Figure 4-3: Electrical Connections – ELV-PRO Circuit Diagram ............................................................. 15
Figure 4-4: Electrical Connections – ELV-PRO Power Supply (Plug 3)................................................... 16
Figure 4-5: Electrical Connections – Trip Resent and Digital Inputs (Plugs 2 & 4) .................................. 16
Figure 4-6: Electrical Connections – EL CT, CT Test and Zero Crossing Connections (Plug 6) .............. 17
Figure 4-7: Electrical Connections – Phase CT Input (Plug 5) ................................................................ 18
Figure 4-8: Electrical Connections – Control Contact Outputs Connections (Plug 1) .............................. 18
Figure 4-9: ELF-PRO Parameter Dongle ................................................................................................ 19
Figure 4-10: Ethernet and Dongle Connections ...................................................................................... 19
Figure 4-11: ELV-PRO Toroid Installation Examples .............................................................................. 20
Figure 5-1: Taskbar Icon: Wired Connection Available ........................................................................... 23
Figure 5-2: Network and Sharing Center ................................................................................................ 24
Figure 5-3: Local Area Connection Status (left) and Properties (right) .................................................... 24
Figure 5-4: Internet Protocol Versions 4 (TCP/IPv4) Properties .............................................................. 25
Figure 6-1: ELV-PRO Relay Fascia Interface ......................................................................................... 28
Figure 6-2: ELV-PRO Web Interface – Overview .................................................................................... 29
Figure 6-3: ELV-PRO Web Interface - Live Graphs (RMS) ..................................................................... 31
Figure 6-4: ELV-PRO Web Interface - Live Graphs (OSC) ..................................................................... 32
Figure 6-5: ELV-PRO Web Interface - Live Graphs (FFT)....................................................................... 32
Figure 6-6: ELV-PRO Web Interface - Data Logs ................................................................................... 33
Figure 6-7: ELV-PRO Web Interface - Data Logs (OSC) ........................................................................ 34
Figure 6-8: ELV-PRO Web Interface - Data Logs (RMS) ................................................................ ........ 34
Figure 6-9: ELV-PRO Web Interface - Data Logs (FFT) ......................................................................... 35
Figure 6-10: ELV-PRO Web Interface - Event Logs ................................................................................ 35
Figure 6-11: ELV-PRO Web Interface - Device Info ................................................................................ 37
Figure 6-12: ELV-PRO Web Interface – Settings ................................ .................................................... 38
Figure 6-13: ELV-PRO Web Interface - About ........................................................................................ 39
Figure 6-14: ELV-PRO Web Interface - Interactive Graph Navigation ..................................................... 40
Figure 6-15: ELV-PRO - Web Interface - Protection Function Trip .......................................................... 40
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TABLE OF TABLES
Table 1: Definitions ................................................................................................................................... 8
Table 2: ELV-PRO Terminal Designators ............................................................................................... 14
Table 3: Earth Leakage Trip level ................................................................................................ ........... 26
Table 4: Earth Leakage Trip Time .......................................................................................................... 26
Table 5: Digital Input Settings ................................................................................................................. 27
Table 6: ELV-PRO Relay Fascia LED Operation ................................................................ .................... 28
Table 7: Web Interface Status Indicators ................................................................................................ 30
Table 8: Event ID Descriptions ............................................................................................................... 36
Table 9: Login Details ............................................................................................................................. 38
Table 10: Modbus Commands ................................................................................................................ 55
Table 11: Modbus Exception .................................................................................................................. 55
Table 12: Modbus Status ........................................................................................................................ 55
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Table 1: Definitions
Term
Definition
BUEL
Back Up Earth Leakage
CB
Circuit Breaker; Main circuit breaker that controls power to all outlets
CCM
Cable Connection Module
CIP
Common Industrial Protocol
CT
Current Transformer
EC
Earth Continuity (Pilot to earth loop resistance)
DHCP
Dynamic Host Configuration Protocol
EFLO
Earth Fault Lock Out
FFT
Fast Fourier Transform
FLC
Full Load Current
GUI
Graphical User Interface
HMI
Human/Machine Interface
HTTP
Hypertext Transfer Protocol
IP
Internet Protocol
MC
Main Contactor; the main power circuit opening device. The main
contactor is opened and closed in order to turn the outlet on and off
MCR
Main Contactor Relay; A relay installed within the protection module to
control the supply to the main contactor coil. All trip times specified are to
the opening of the MCR
NER
Neutral Earthing Resistor
NTP
Network Time Protocol
RMS
Root Means Square
RTC
Real Time Clock
TCP
Transmission Control Protocol
UTP
Unshielded Twisted Pair
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1 SAFETY AND OTHER WARNINGS
For safety reasons, the ELV-PRO 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.
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 relay 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 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
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 the 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.
Inspection
Equipment that is found to be damaged or has been modified away from its published specifications
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.
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.
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
Description
Ampcontrol’s ELV-PRO is a high performance, microprocessor based, wide bandwidth earth leakage
protection relay that is capable of measuring and analysing power and switching frequency currents
flowing in IT power systems. The ELV-PRO uses patented technology (US20130258537) to characterise
earth leakage currents giving superior fault discrimination.
The ELV-PRO relay is designed for use in systems that may exhibit circulating earth currents and
complex earth leakage currents typically associated with variable speed drives in mining environments.
Key Features
The ELV-PRO has the following key features:
Compliance to AS/NZS 4871 and AS/NZS 2081
Patented earth leakage analysis method*
Fail safe operation
Wide range Earth Leakage Current Measurement (20 Hz to 8 kHz)
Wideband, Narrowband and Weighted Frequency Response Modes
Adjustable trip level and trip times
On board memory logs last 1000 data logs and 50 events
CIP over EtherNet/IP for control and Monitoring
Modbus TCP
Continuous Toroid Connection Monitoring
DIN rail mounted
* International patent application number PCT/AU2011/000705
Application
The ELV-PRO is intended for use at transformer NER connection points as a BUEL Protection relay. The
relay is not limited to be used in this configuration only, and can be utilised on any individual outlet if
desired. This would allow greater earth leakage current data to be captured relating to a specific outlet,
rather than the entire system connected to the transformers secondary that the NER is protecting.
The ELV-PRO provides data logging to assist in fault finding. On each event trigger, the relay stores
system data two seconds before and two seconds after the event including system time, earth leakage
current, phase current and zero crossing of the phase current.
Ethernet connection to the ELV-PRO relay provides the ability to monitor the device parameters and real
time measured current from an internet browser. All data logs stored on the unit can also be viewed.
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4 INSTALLATION
General Warnings
These instructions have been designed to assist users of the ELV-PRO with installation.
Before the ELV-PRO 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 relay are understood to prevent
incorrect installation or use, 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 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 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 logical operation nor its signalling be
compromised by incompatibilities with connected equipment.
4.1.4 Modifications of any form to the relay are prohibited.
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.
Mandatory Installation Practices
The following information must be adhered to when installing the ELV-PRO. Failure to adhere to this
information may give rise to unsafe operation.
Using the relay in a manner that exceeds its electrical or functional 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 ELV-PRO must be supplied by a regulated voltage within the specified range.
The installation of the ELV-PRO must be carried out by suitably trained and qualified personnel.
Identification labels fixed to the ELV-PRO must not be damaged, removed or covered.
The installation is to be in accordance with the relevant installation Standards/Codes of Practice.
Modifications must not be made to any part of the ELV-PRO. Modifications to its construction will
render the unit non-compliant.
Complete and accurate records of the installation must be retained for warranty purposes.
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Mechanical Installation Information
Figure 4-1: ELV-PRO Dimensions
The ELV-PRO metal enclosure is rated at IP20. It is DIN Rail mounted and measures 135mm x 135mm
and 107mm deep as per Figure 4-1. The terminal layout and description is shown in Figure 4-2 and
Table 2 respectively.
Figure 4-2: ELV-PRO Terminal Layout
135
135 107
1
2
4
5
6
3
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Table 2: ELV-PRO Terminal Designators
Plug
Label
Designator
Plug
Label
Designator
1
P1_5
Contact 2: Normally Open
4 P4_6
Trip Reset Input
P1_4
Contact 2: Common
P4_5
Digital Input 5
P1_3
Contact 1: Normally Open
P4_4
Digital Input 4
P1_2
Contact 1: Normally Closed
P4_3
Digital Input 3
P1_1
Contact 1: Common
P4_2
Digital Input 2
P4_1
Digital Input 1
2
P2_6
Digital Input 6: 24V Supply
P2_5
Digital Input 5: 24V Supply
5 P5_3
Phase CT Cable Shield
P2_4
Digital Input 4: 24V Supply
P5_2
Phase CT Input: Signal
P2_3
Digital Input 3: 24V Supply
P5_1
Phase CT Input: Common
P2_2
Digital Input 2: 24V Supply
P2_1
Digital Input 1: 24V Supply
6 P6_8
Zero Crossing Input (110VAC)
P6_7
Zero Crossing Input (110VAC)
3
P3_4
Power Supply Input: 0V
P6_6
CT Test Signal
P3_3
Power Supply Input: 0V
P6_5
CT Test Signal
P3_2
Power Supply Input: +24V
P6_4
Earth Connection
P3_1
Power Supply Input: +24V
P6_3
EL CT Cable Shield
P6_2
EL CT Input: Signal
Screw
Chassis Earth Connection
P6_1
EL CT Input: Common
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Electrical Installation Information
A typical installation diagram of the ELV-PRO is shown below, Figure 4-3. The following sub-sections
provide a more detailed description of each of the individual circuit elements.
Figure 4-3: Electrical Connections – ELV-PRO Circuit Diagram
WARNING!
Ensure all connections to the relay are correct prior to putting into
service. Incorrect wiring may cause damage to the relay and the
systems into which it is installed.
ELV-PRO
P3_1
24 VDC
Supply
DIG IN 5
DIG IN 4
DIG IN 3
DIG IN 2
DIG IN 1
Circuit
Breaker
Main
Contactor
M
NER
A B C
N/O 2
COM 2
N/O 1
N/C 1
COM 1
PHASE CT
PHASE CT
CT SCRN
EARTH
SIGNAL
EL CT
EL CT
EL CT SCRN
CT TEST
INPUT (110VAC)
ZERO CROSSING
Relay
Output 2
Relay
Output 1
Zero Crossing
Detector
Optional
Front Panel
RESET Button
Front Panel IP
RESET Button
+24VDC
0V
24V
RESET INPUT
P3_2
P3_3
P3_4
P2_6
P2_5
P2_4
P2_3
P2_2
P2_1
P4_6
P4_5
P4_1
P4_2
P4_3
P4_4
P1_5
P1_4
P1_3
P1_2
P1_1
P5_3
P5_2
P5_1
P6_4
P6_5
P6_1
P6_2
P6_3
P6_6
P6_7
P6_8
Alternate
Installation
RESET
P/B
Chassis
Earth
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4.4.1 Power Supply (Plug 3)
The ELV-PRO requires a regulated 24VDC power supply. There are two input supply connections for
both the 0V and +24VDC inputs. These connections are internally connected. Terminals P3_1 & P3_2
are the positive supply inputs. Terminals P3_3 & P3_4 are the negative supply inputs.
Figure 4-4: Electrical Connections – ELV-PRO Power Supply (Plug 3)
NOTE
There are two internally connected input supply terminations for each
input. The additional connection is to allow for daisy chaining to other
devices.
4.4.2 Trip Reset and Digital Inputs (Plug 2 & Plug 4)
The trip reset and digital inputs are split across two plugs; Plug 2 and Plug 4 (see Figure 4-5). Plug 2
(right) is a dedicated digital input and Trip Reset 24V supply. All terminals of plug 2 are internally
connected. Plug 4 (left) is a dedicated input plug; terminals P4_1 - P4_5 are assignable digital inputs,
with terminal P4_6 the Reset input. The Trip Reset Input allows the ELV-PRO to be reset remotely.
Figure 4-5: Electrical Connections – Trip Resent and Digital Inputs (Plugs 2 & 4)
ELV-PRO
P3_1
24VDC
Control Supply
Plug 3
+24VDC
0V
P3_2
P3_3
P3_4
ELV-PRO
DI1
DI2
DI3
DI4
DI5
RST
ELV-PRO
P4_6
P4_5
P4_4
P4_3
P4_2
P4_1
P2_6
P2_5
P2_4
P2_3
P2_2
P2_1
+24VDC
Plug 4 Plug 2
RESET P/B
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4.4.3 Earth Leakage CT, CT Test, Zero Crossing Input Connections (Plug 6)
The Earth Leakage protection is achieved through the use of a core balance CT. The connections to
the CT are terminals P6_1 & P6_2. Terminal P6_3 is the screen termination point for the cable
connecting the EL CT to the relay. For further details see Section 4.4.9.
NOTE
The loop impedance of the cables used to connect the phase CT to
the ELV-PRO relay must be less than 0.1Ω. It is recommended that
this is wired as a twisted pair shielded cable.
To ensure the CT is connected and the signal the relay monitors is correct, a CT test output is provided
on terminals P6_5 & P6_6. A missing CT Test signal through the CT will cause the ELV-PRO relay to
trip. The test signal is applied every two seconds, and may be seen on the live screens and data logs.
Terminal P6_4 of Plug 6 is a general earth connection.
The Zero Crossing input, terminals P6_7 & P6_8, is provided for logging purposes.
Figure 4-6: Electrical Connections – EL CT, CT Test and Zero Crossing Connections (Plug 6)
NOTE
The protection system constantly injects a CT test signal into the CT
every two seconds. As such, the earth leakage graph will record a small
non-zero value, even when the outlet is open (Not connected to the
load). This confirms that the Earth Leakage system is operational.
ELV-PRO
NER
Alternate
Installation
To neutral of Star
Connected Transformer
P6_6
P6_3
P6_2
P6_1
P6_5
P6_4
CT TEST
EL CT SCRN
EL CT
EL CT
SIGNAL
EARTH
Plug 6
ZERO CROSSING
INPUT (110VAC)
Zero Crossing
Detector
P6_8
P6_7
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4.4.4 Phase CT Input (Plug 5)
The ELV-PRO relay has an optional phase CT input which is captured only during a logged event if
available. The CT is connected to terminals P5_1 & P5_2. Terminal P5_3 is the screen termination
point for the cable connecting the phase CT to the relay. Typical connection is shown in Figure 4-7.
Figure 4-7: Electrical Connections – Phase CT Input (Plug 5)
NOTE
The loop impedance of the cables used to connect the phase CT to
the ELV-PRO relay must be less than 0.1Ω. It is recommended that
this is wired as a twisted pair shielded cable.
4.4.5 Control Contact Output Connections (Plug 1 Terminals 1,2,3,4 & 5)
The ELV-PRO has two control contact output Relays.
Figure 4-8: Electrical Connections – Control Contact Outputs Connections (Plug 1)
ELV-PRO
Phase Conductors
P5_3
P5_2
P5_2
SCRN
SCRN
SCRN
Plug 5
ELV-PRO
N/C 1
N/O 2
COM 2
N/O 1
COM 1
Relay
Output 2
Relay
Output 1
P1_5
P1_4
P1_3
P1_2
P1_1
Plug 1
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4.4.6 ELV-PRO Dongle Input (Dedicated Dongle Slot)
The ELV-PRO has a dedicated dongle input, item 2 of Figure 4-10. The dongle is keyed and therefore
has a specific orientation. Refer to Figure 4-9.
Figure 4-9: ELF-PRO Parameter Dongle
4.4.7 Ethernet Input (Dedicated Ethernet Socket)
The ELV-PRO has an Ethernet socket to allow the ELV-PRO to be connected to a network switch or
directly to a PC or Ethernet device, see item 1 of Figure 4-10.
Figure 4-10: Ethernet and Dongle Connections
4.4.8 Removal of ELV-PRO Relay
The ELV-PRO can be removed by simply removing the plugs and dislodging the Analyser from the DIN
rail. Each plug is secured to the ELV-PRO through two screws on either end to prevent the plugs
becoming loose during operation or transport.
4.4.9 ELV-PRO Current Transformer Location and Selection
The ELV-PRO relay has been designed for compliance to AS/NZS 2081:2011 for use on earth fault
limited systems. There are generally two locations where the ELV-PRO may be installed:
1- Core balance protection performs the primary protection in an installation by protecting the outlet
supplying power to a machine. In this application the relay’s operation time is typically set at
instantaneous. The three power phases are passed symmetrically through the centre of 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, allowing the
toroid to produce an output, which in turn trips the relay.
A test current is injected through the window of the toroid to test the operation of the relay.
1
2
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2- Series neutral protection is the backup protection method and may have an operation time up to
a maximum of 500ms. In this method the neutral to earth connection is passed through the
toroid. An earth fault on any of the phase conductors causes an earth current which returns,
through the neutral, to the star point of the transformer and is detected by the toroid.
A test circuit can connect a test resistor between a phase and earth or inject a current through
the toroid as previously described.
NOTE
The test resistor to earth method is recommended with this type of
protection as this test also proves the neutral to earth connection.
Figure 4-11: ELV-PRO Toroid Installation Examples
The ELV-PRO relay is designed for use with Ampcontrol 100/1A EL500S series Toroids. They are
available with window sizes 25, 60, & 112mm.
4.4.10 ELV-PRO Phase Monitoring Toroid
The ELV-PRO has provision for the connection of a suitable toroid, with a secondary rating of 5A, to
monitor a phase current in the system.
NOTE
No settings are required within the unit for the connection of this
additional toroid, but the ratio of the toroid should be recorded so that
when data is analysed, the actual phase current can be calculated.
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5 PRODUCT OPERATION
The ELV-PRO’s advance analysis ability does not prevent the relay operating as an effective Earth
Leakage Protection Relay. This section will discuss the various features of the relay.
Earth Leakage Protection
The Earth Leakage (EL) protection used in the ELV-PRO is based upon the ELV wideband EL Protection
relay. The relay is designed to AS/NZS 2081:2011 Section 6. The ELV-PRO, like the ELV, 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 through the web interface. When a fault occurs above the relays trip level and
time delay settings, 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 and requires a reset input to clear,
either through the web interface, Ethernet IP or Modbus IP. A local reset is also provided on the fascia of
the relay.
The user has the ability to switch the relay between wideband (up to 8 kHz), narrowband (power
frequency) and weighted frequency mode (up to 8 kHz, high frequency compensated).
The ELV 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 to AS/NZS 3190).
The ELV-PRO has three operating modes:
Wideband mode: The relay will see all currents between 20 Hz and 8 kHz and trips if the true
RMS level of leakage current is above the trip level (adjustable from 50mA to 5A). This mode is
compliant with AS/NZS 2081:2011 and would be used in most cases.
Narrowband (power frequency) mode: The relay will see all currents between 20 Hz and 100 Hz
and trips if the true RMS level of leakage current is above the trip level (adjustable from 50mA to
5A). This mode operates as a traditional earth leakage relay.
Weighted frequency mode: This mode sets a modified form of wideband operation for demanding
applications; these settings allow increased trip levels at higher frequencies to take into account
the reduced sensitivity of the human body to touch potentials at these frequencies.
Earth Leakage Analysis Tool
The ELV-PRO offers real time analysis of the earth leakage current and also provides a logging function
that allows the data to be analysed later.
The real time analysis consists of three live graphs; an Oscilloscope graph, RMS Graph and a Fast
Fourier Transform Graph.
OSC (Oscilloscope) graph: Plots the instantaneous values of earth leakage current measured by
the ELV-PRO. At every update, it displays the last 80ms of data.
RMS graph: In this view, Root Mean Square values of the measured current are shown. The user
is able to select the time interval on the graph by selecting from the buttons below the graph.
FFT graph: This plot shows the frequency content of the past 80ms worth of instantaneous
measurements.
For further details on navigating these graphs and utilising the analysis tools refer to Section 6.
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Data Logging
Data logs are triggered by a trip or alarm event, a trigger from a digital input, or can be set to happen
periodically. On each event trigger, the ELV-PRO stores system data for two seconds before and two
seconds after the event. This includes:
System time,
Earth leakage current,
Phase current (with connection of a toroid, 5A secondary connection, within ±5% of full-scale),
Zero crossing of the phase current (with connection of a 110Vac supply), and
Temperature
The last 1000 events are stored in the unit. The internal storage cannot be overwritten by the user. When
the unit’s memory reaches capacity the oldest entries are overwritten.
Besides being triggered by a trip, logging can be initiated in three other ways:
Digital Inputs: By a signal at digital inputs 1-5.
Periodically: Logging initiated by the ELV-PRO software at a regular interval.
Alarm level logging: The user selects a trip level and delay below that of the unit’s main trip
settings; typically those of the downstream protection. This allows the user to see the operation of
the downstream protection. A cool down time can also be selected to prevent the unit from
continuously logging.
Real Time Clock (RTC)
Recorded data is stored on the ELV-PRO with a time stamp, indicating the system time when the log
was made. For the purposes of aligning recorded data with other records, it is important that the user
regularly checks that the time on the RTC reflects a level of accuracy acceptable to the user.
Without regular synchronisation, the RTC may become different from actual time. The ELV-PRO does
not have an on board battery to maintain the RTC settings.
NOTE
The ELV-PRO does not have an on board battery to maintain the real
time clock. Without regular synchronisation, the RTC may be different
from the actual time.
If the relay is not configured to use a NTP server, on power-up the relay will look at the last event stored
in the memory, add 30 seconds, and use this time as the current time. When a change is made to the
relay’s time, an event is recorded, capturing the relative time with reference to the power-up time, and a
second event is captured with a time stamp of the new configured time.
By doing this any events that occur between power-up and time synchronism can be manually
timestamped to the correct time relative to the configured time change. The ELV-PRO can be configured
to utilise an NTP server on a connected network. Refer to Section 6.2.6 for further information. This
allows the relay to automatically update the time. Similarly to a manual time change, if the NTP server
causes the ELV-PRO to adjust its time configuration, the previously mentioned events will be captured.
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IP Configuration
The Ethernet connection can be configured in two ways, Static IP or DHCP configurations.
If there is a DHCP server running on your local network, the DHCP setting should be selected in the
relays settings page, Section 6.2.6Error! Reference source not found.. Alternatively if you wish to
manually configure a static IP address, this can also be adjusted in the settings page.
DHCP: Requires no further user configuration.
Static IP: Requires the user to manually set up the required network parameters. These include
IP address, subnet mask and gateway address. These are typically specified by your network
administrator.
Connection to the ELV-PRO’s internal web server requires access to a web browser on a connected PC
or GUI that has access to HTTP port 80. Network settings will need to be configured correctly to
successfully connect to the ELV-PRO web server. If there are multiple ELV-PRO relays used on a single
network switch, initial configuration through a dedicated connection may be required before you can
access through a network switch.
NOTE
Minimum recommended browser versions for full functionality: Microsoft
Internet Explorer 9, Google Chrome 20, Apple Safari 5 (or Mobile Safari
from iOS 6), Mozilla Firefox 13, Opera 12.
NOTE
Initial Configuration of an ELV-PRO relay may require direct connection
to a PC / GUI using a standard through-type Ethernet cable
(CAT5 UTP).
5.5.1 Configuration through a Dedicated Connection
First time operation and operation after an IP Reset may require configuration through a dedicated
connection. After connecting the ELV-PRO directly your computer, the red cross over the
wireless/hardwired icon on your task bar icon should disappear. If the wireless icon was displayed prior
to connecting, the icon will change to the hardwired icon. There will likely be a yellow triangle with an
exclamation mark over the hardwired icon, as shown in Figure 5-1. The triangle symbol simply means
that internet access is unavailable.
Figure 5-1: Taskbar Icon: Wired Connection Available
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You will need to configure the network adapter settings by right-clicking on this icon and selecting “Open
Network and Sharing Center”. The following should appear:
Figure 5-2: Network and Sharing Center
Click on “Local Area Connection” for the status page to appear as in Figure 5-3.
Figure 5-3: Local Area Connection Status (left) and Properties (right)
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Click the “Properties” button for the “Local Area Connection Properties” window to appear as in Figure
5-3.
Double click on “Internet Protocol Version 4 (TCP/IPv4)”. The following should appear:
Figure 5-4: Internet Protocol Versions 4 (TCP/IPv4) Properties
Assign the following IP address and Subnet mask:
IPv4 Address = 10.1.1.xxx, where xxx is a value between 1 and 250 excluding address 10 (The
ELV-PRO default setting is 10 so will cause a clash)
IPv4 Subnet Mask = 255.255.255.0.
Once you have configured the network adapter settings, open up a web browser and type the following
IP address into the browsers address bar:
10.1.1.10
The ELV-PRO Web Interface should appear as detailed in Section 6.
Protection Settings
The modifiable settings of the ELV-PRO include the following:
Earth Leakage Trip Level
Earth Leakage Trip Time
Earth Leakage Alarm Trip Level
Earth Leakage Alarm Time
Alarm Cool Down
Earth Leakage Mode
Digital Input Settings
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5.6.1 Earth Leakage Trip Level
This defines the leakage current which will cause an Earth Leakage trip. The current is detected via the
Earth Leakage CT and is given in RMS. The setting can be any value between 50mA and 5000mA
inclusive. The web server however has used values in set intervals to make adjustment easier and
quicker. These values can be seen below, Table 3.
Table 3: Earth Leakage Trip level
Value
Value
Value
50mA
1100mA
3100mA
100mA
1200mA
3200mA
150mA
1300mA
3300mA
200mA
1400mA
3400mA
250mA
1500mA
3500mA
300mA
1600mA
3600mA
350mA
1700mA
3700mA
400mA
1800mA
3800mA
450mA
1900mA
3900mA
500mA
2000mA
4000mA
550mA
2100mA
4100mA
600mA
2200mA
4200mA
650mA
2300mA
4300mA
700mA
2400mA
4400mA
750mA
2500mA
4500mA
800mA
2600mA
4600mA
850mA
2700mA
4700mA
900mA
2800mA
4800mA
950mA
2900mA
4900mA
1000mA
3000mA
5000mA
5.6.2 Earth Leakage Trip Time
This defines how quickly the Earth Leakage trip will occur when the current through the CT is greater
than the Earth Leakage Trip Level. These values are the maximum trip time, not the minimum (that is a
trip is guaranteed to occur in less than 100ms when set to 100ms). The setting can be any value
between 50ms and 500ms inclusive. The web server however has used values in set intervals to make
adjustment easier and quicker. These values can be seen below.
Table 4: Earth Leakage Trip Time
Max. Trip Time
Max. Trip Time
Instant (50ms)
300ms
100ms
350ms
150ms
400ms
200ms
450ms
250ms
500ms
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5.6.3 Earth Leakage Alarm Trip Level
The setting can be any value between 50mA and 5000mA inclusive. The web server however has used
values in set intervals to make adjustment easier and quicker. These values are identical to the EL Trip
Level, as shown in Table 3.
5.6.4 Earth Leakage Alarm Time
This can be set to any value between 1ms and 1500ms inclusive. The web server however has used
values in 50ms intervals to make adjustment easier and quicker.
5.6.5 Alarm Cool Down
This is the number of seconds that needs to have elapsed before the alarm can re-trigger. The value can
be set to any value between 5 seconds and 300 seconds inclusive. The web server however has used
values in set intervals of 5 seconds to make adjustment easier and quicker.
5.6.6 Digital Input Settings
The five (5) digital inputs are individually configured to suit the user’s application requirements. The
following settings can be selected.
Table 5: Digital Input Settings
Digital Input Polarity
Digital Input Action
Normally Open
None
Normally Closed
Log
ELV-PRO CIP over EtherNet/IP Interface
The ELV-PRO has included EIP protocol to allow external equipment (capable of communicating in this
protocol) to monitor and reset the ELV-PRO, such as a PLC. The EIP commands and configuration can
be seen in APPENDIX C: ELV-PRO CIP OVER ETHERNET/IP.
ELV-PRO Modbus TCP Interface
The ELV-PRO has included a Modbus IP protocol to allow external equipment (capable of
communicating in this protocol) to monitor and reset the ELV-PRO, such as a PLC. The Modbus IP
commands and configuration can be seen in APPENDIX D: ELV-PRO Modbus TCP.
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6 OPERATIONAL INTERFACE
This section provides information relating to the interfacing of the ELV-PRO. All interfacing elements will
be defined here including the front Facia, Web server, Ethernet IP and Modbus IP.
ELV-PRO Facia Interface
The ELV-PRO has a basic interface on the front of the relay. The relay has been specifically designed to
operate through a PC or web server when connected to a network. The ELV-PRO interface is shown in
Figure 6-1.
The front of the relay has two buttons and two indicators. The ‘Reset’ button, Item 3 in Figure 6-1,
functions as a local reset button allowing a trip to be reset, provided the fault has cleared. The ‘IP Reset’
button, Item 4 in Figure 6-1, is used to reset the IP address to the factory default setting (10.1.1.10). An
IP Reset requires a ‘press and hold’ operation for 8 seconds. A successful IP Reset, will be confirmed
through the front LED indication sequence as indicated in Table 6.
Figure 6-1: ELV-PRO Relay Fascia Interface
Table 6: ELV-PRO Relay Fascia LED Operation
LED
Description
Healthy / Green
Trip / Red
Flash (1Hz)
Off
Healthy Relay
Flash (5Hz)
Tripped Relay
Flash (2Hz)
OFF/ON
IP Reset. Once the reset has taken effect the red
indicator will remain on for 5 seconds
3
1
2
4
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ELV-PRO Web Interface
The ELV-PRO Web Interface allows the user to remotely access the information stored within the ELVPRO. This includes live data, event and data logs, device information and settings. The ELV-PRO has
six main tabs, accessible from the left-hand side of the page. These are:
Live Graphs
Data Logs
Event Logs
Device Info
Settings
About
6.2.1 Connecting to the ELV-PRO Web Interface
In order to connect to the ELV-PRO Web Interface, the user must type the IP address of the Analyser
that they wish to connect to into their web browsers address bar. To view the Web Interface, the
computer that is accessing the Analyser must be connected to the same network as the Analyser. For
more information on IP configuration, refer to Section 5.5.
The Live Graphs tab is the default landing page and will automatically be displayed upon accessing the
Web Interface. Refer to Section 6.2.2 for more information on the Live Graphs.
The web interface has a number of features that are common to all views. These features are identified
in Figure 6-2 by numbered circles. Items identified by these numbered circles are explained in further
detail in the following sub-sections.
1
3
4
5
2
Figure 6-2: ELV-PRO Web Interface – Overview
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NOTE
In order to view the Web Interface, the ELV-PRO and the computer that
is accessing the Analyser must be on the same network.
NOTE
Minimum recommended browser versions for full functionality: Microsoft
Internet Explorer 9, Google Chrome 20, Apple Safari 5 (or Mobile Safari
from iOS 6), Mozilla Firefox 13, Opera 12
Item 1: Selected Tab
This name of the tab that is currently visible is displayed here.
When the relay is tripped, the web server reset button is also displayed next to the tab name (see
Section 6.2.9).
Item 2: IP Address | Temperature | Unit Date and Time
This area of the Web Interface displays:
The relays description
The IP address of the ELV-PRO
The temperature that the ELV-PRO is currently operating at
The Hardware status
Trip Level
Trip Time
EL Current
The relay’s description in the top of the screen is defined in the ELV-PRO dongle settings (see Section
6.2.6Error! Reference source not found.). This description is also used to correctly identify the
connected ELV-PRO relay.
Item 3: ELV-PRO Analyser Status Indicators
The ELV-PRO Status Indicators display the status of the Web Interface’s network connection to the
Analyser and the status of the Relay. The functionality of these indicators is outlined in Table 7.
Table 7: Web Interface Status Indicators
Indicator
Colour
Description
Network
Green/Red
The network indicator flashes green every time a
network request is made to the unit. If a network
request fails, this indicator will flash red.
Tripped
Red
This indicator illuminates red when the unit trips.
The header block and page background will also
change to red.
Item 4: Tab Selection Panel
The Tab Selection Panel allows the user to switch between the different views in the ELV-PRO Web
Interface. To move between tabs, simply mouse over the desired tab and select it with the left mouse
button.
Item 5: Tab Viewing Area
This area of the Web Interface will display the information that is relevant to the tab that has been
selected. The area outside of this zone will remain constant.
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6.2.2 Live Graphs Tab
Figure 6-3 shows the ELV-PRO Live Graphs interface. By default, the Live Graphs tab displays the RMS
graph of the past 30 seconds. The graphs in this tab are refreshed every second; provided the Live
Update button (Item 2 of Figure 6-3) is activated (default is ON). With the Live Update button disabled
the plot is static which can allow for better inspection of the data shown using the interactive features of
the plots (described in Section 6.2.8). The buttons above the graphs (item 1 of Figure 6-3) allow the
graph to alternate between the three possible options. These are:
OSC (Oscilloscope) graph: Plots the instantaneous values of earth leakage current measured by
the ELV-PRO. At every update, it displays the last 80ms of data. Figure 6-4.
RMS graph: In this view, Root Mean Square (RMS) values of the measured current are shown.
The user is able to select the time interval on the graph by selecting from the buttons below the
graph. Figure 6-3.
FFT graph: This plot shows the frequency content of the past 80ms worth of instantaneous
measurements. Figure 6-5.
For information on navigating the interactive graphs see Section 6.2.8. There is also a Help button below
the plots, item 4 of Figure 6-4, which allows access to online help information.
1 2
3
4
Figure 6-3: ELV-PRO Web Interface - Live Graphs (RMS)
NOTE
The protection system constantly injects a CT test signal into the CT
every two seconds. As such, the earth leakage graph will record a small
non-zero value, even when the outlet is de-energised. This confirms
that the Earth Leakage detection is operational.
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1
2
3
4
Figure 6-4: ELV-PRO Web Interface - Live Graphs (OSC)
1
2
3
4
Figure 6-5: ELV-PRO Web Interface - Live Graphs (FFT)
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6.2.3 Data Logs Tab
The Data Logs tab is similar to the Live Graphs tab, in that it allows inspection of measured earth
leakage currents. However, in this tab, historic measurements from data logs stored on the ELV-PRO
relay are shown.
Each data log is centred on a trip or log event (i.e. the log covers the two seconds before and two
seconds after the log initiation, making the command instant at the centre of the graph).
Once a particular log is selected from the list (Item 1 of Figure 6-6) in the drop down menu, OSC, RMS
and FFT views are available as they are in the Live Graph tab.
The RMS view (Figure 6-8) is calculated using a running window of 300 data points.
The FFT graph (Figure 6-9) corresponds to the selected 80ms of signal. A small oscilloscope plot of the
signal (item 2 of Figure 6-9) is provided to indicate where in the recording the data is being analysed.
Use the slider below the plot to select another window within the recording.
Data logs can also be downloaded by clicking on the ‘Download Log’ button. This will export the data in
an Ampcontrol proprietary format.
1
Figure 6-6: ELV-PRO Web Interface - Data Logs
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1
Figure 6-7: ELV-PRO Web Interface - Data Logs (OSC)
1
Figure 6-8: ELV-PRO Web Interface - Data Logs (RMS)
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2
1
Figure 6-9: ELV-PRO Web Interface - Data Logs (FFT)
6.2.4 Event Logs Tab
This tab shows the 50 most recent user changes made at the unit, see Figure 6-10. To export this list,
use the link above the log (item 1) to show the log entries in a separate popup window for printing or
copy-pasting. The Event log descriptions can be found in Table 8 below.
1
2
Figure 6-10: ELV-PRO Web Interface - Event Logs
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Table 8: Event ID Descriptions
Event ID
String
Description
0
Unused
Not a valid message. Should not be seen
1
System Powered Up
When the unit received power following a normal shut down
2
System Powered Down
When the unit had power removed in a normal shut down
3
Loss of RTC Detected
The Real Time Clock has been lost
4
Stored Trip Corrupted
The trip value as stored in the EEPROM is corrupted.
Defaulting to the unit being tripped
5
Trip Reset (Local)
When the unit has been reset after a trip using the Local Trip
Reset
6
Trip Reset (Ext Input)
Unit has been reset after a trip using a pushbutton on the
external input
7
Earth Leakage Trip
Unit tripped due to detection of an earth leakage current at or
exceeding the trip settings
8
Ext Input Trip
Unit tripped due to a signal from an external input
9
Ext Input Log
A signal change is seen at any configured input
10
Periodic Log
Periodic log has been taken
11
Settings Changed
User has changed settings
12
EEPROM has failed
The internal EEPROM chip has failed
13
OS Scheduler fault
The internal Threading Scheduler has failed
14
Open Toroid Trip
Unit tripped because it could not sense the earth leakage
current detection toroid
15
Relay failed to close
Relay contacts failed to close when expected
16
Relay failed to open
Relay contacts failed to open when expected
17
System Restarted
The unit has restarted un-expectedly
22
Power State Corrupted
The unit’s previous power state is corrupted
23
Alarm tripped Log
Unit has made a log on the alarm level setting
24
Serial Number Corrupted
Serial Number value Corrupted and is out of range
(Not a valid number)
25
MAC Address Corrupted
Serial Number value Corrupted
(Not a valid number)
26
EL Sample rate Error
The internal protection loop has failed to execute in the
required time
27
Dongle Missing
The parameter dongle has been removed or is not operating
28
Invalid Dongle Type
The parameter dongle is not correctly setup for the ELV Pro
29
IP Address Reset
The unit’s IP address has been reset to its factory default
30
Trip Reset (Webpage)
When the unit has been reset after a trip using the web
interface
31
Pre Large NTP Time
Adjustment
The system’s time is about to be modified based upon the
NTP server (used to determine size of system time change.)
32
Post Large NTP Time
Adjustment
The system’s time has been modified based upon the NTP
server (used to determine size of system time change.)
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6.2.5 Device Information Tab
The Device Information Tab (Figure 6-11) shows settings, states and measurements relating to the
hardware and software of the Analyser. The information is updated once a second and includes:
Trip Settings
Network Settings
NTP Settings
ADC Settings
Software Information
General Settings
Systems Trips
Digital Input Settings
Hardware Status
Figure 6-11: ELV-PRO Web Interface - Device Info
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6.2.6 Settings Tab
The settings Tab (Figure 6-12) allows for configuration of the following:
Trip Settings
Network Settings
NTP Settings
Date and Time
Digital Input Settings
Unit Configuration
ADC Settings
Passwords
To access the Settings page, the user will be prompted to enter a Username and Password. The default
login details are shown in Table 9 below. Once the desired settings have been changed, select “Save
Settings” to save and return to the Home page.
Table 9: Login Details
Username
admin
Password
Password
Figure 6-12: ELV-PRO Web Interface – Settings
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NOTE
Username and Password are case sensitive. Record the Username and
Password as resetting these will require the ELV-PRO to be reset. This
will erase all user settings.
When the ELV-PRO has been installed and powered up for the first time in an installation, it is
recommended that the user press the ‘Calibrate ADC’ button on the settings page. When doing this the
outlet or outlets the relay is protecting should not be energised. This will allow the relay to factor in the
cable wiring, toroid differences and any influences due to the installation and location of the equipment
for the application/installation.
6.2.7 About Tab
The About Tab (Figure 6-13) provides contact details and licensing information about the device and
website.
Figure 6-13: ELV-PRO Web Interface - About
6.2.8 Interactive graph navigation
The graphs shown on the website are interactive. The user can zoom, pan, and display values:
To zoom in, click on the graph and drag either horizontally (as shown in Figure 6-14) or vertically.
Alternatively, for touchscreen devices pinch out to zoom in.
To zoom out, double click the graph area (or pinch in on touchscreen devices)
To pan around, shift-click and drag (mouse driven devices) or swipe (touchscreen devices)
To display signal values, simply mouse over the plot to show the extended legend in the top right
of the graph area (not available on touchscreen devices).
In the Oscilloscope and RMS graphs of a historic data log, time intervals can be determined by marking
the start and end time with single clicks and then reading off the selected range from the box in the top
left of the plot. To remove the marked range, click the box. To refine the selection, use single clicks near
either end of the marked range to move the markers.
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Figure 6-14: ELV-PRO Web Interface - Interactive Graph Navigation
6.2.9 Protection Function Trip
Should a trip occur, the trip indicator illuminates red (Item 3 of Figure 6-15) and the header block (Item 1
of Figure 6-15) and page background changes to red. The Reset pin code entry and button will also
appear, see Item 2 in Figure 6-15. To reset, simply enter the pin and select the reset button.
2
1
3
Figure 6-15: ELV-PRO - Web Interface - Protection Function Trip
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7 SERVICE, MAINTENANCE & DISPOSAL
Equipment Service
A number of external system based checks should be completed on a regular basis. These ‘routine
inspections’ must be carried out by suitably trained people with knowledge of the ELV-PRO 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.
7.1.1 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 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.
7.1.2 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.
7.1.3 Electrical Testing / Commissioning
Prior to being put into service, the electrical protection system must be correctly commissioned. This
manual does not cover system commissioning; the scope of commissioning tests should be
determined during the risk assessment or FMEA covering the design of the electrical protection
system.
The following points can provide guidance on checking the correct operation of ELV-PRO during
commissioning. This is not intended to provide an exhaustive commissioning checklist, but should be
considered to be a minimum.
Ensure that the system is connected in accordance with the manufactures’ instructions, and
conforms to the intended design.
In the case of monitoring the NER circuit, ensure that no alternate earth paths exist that bypass
the NER.
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Perform an earth leakage test by injecting a current through the primary (window) of the EL toroid
and verify that the unit behaves as expected and that when it trips it also operates the intended
circuit breaking device.
The ADC settings should be calibrated through the web server interface on each installation or
routine maintenance.
CAUTION!
Insulation Resistance or “megger” testing MUST NOT be done when
the ELV-PRO is wired in to the circuit. Disconnect CT wiring to the unit
before performing insulation resistance tests.
Equipment Maintenance
WARNING!
The ELV-PRO has no user-serviceable parts.
All repairs must be carried out by Ampcontrol only.
If a fault develops, return the unit to Ampcontrol for repair. It is essential
that no attempt be made to repair the unit as any attempt to
dismantle or repair the unit can seriously compromise the safety of
the unit and voids product warranty.
It is recommended that the electrical protection system incorporating the ELV-PRO be subject to regular
functional tests at intervals determined by risk assessment of FMEA. These intervals typically coincide
with periodic maintenance checks and will cover (but not limited to) tests such as earth continuity tests.
Disposal
ENVIRO
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 which could otherwise be caused by
incorrect waste handling of this product.
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8 SPECIFICATIONS
Specifications
Supply
Regulated Voltage
24V DC ±25%
Power Supply Requirement
12W
Dimensions
ELV-PRO (W x H x L) (mm)
135 x 135 x 107
Operating Conditions
Ambient operating
temperature
0-60°C
IP Rating
IP20
Earth Leakage Protection
Trip Current Level
50mA – 5A (50mA – 1A in 50mA increments, 1A – 5A in 100mA increments)
Trip Operation Time
Instantaneous – 500ms in 50ms increments.
Output Contacts
Relay 1 – Fail Safe
1xCO (Mechanical) 6A / 250VAC, 50VDC, 300VA (cosø=1)
Relay 2 – Fail Safe
1xNO (Solid State) 2.9A / 110VAC/DC, 100VA (cosø=1)
ELV-PRO Inputs
Inputs 1-5
Programmable Trip/Log functions
Input 6 – Trip Reset
Manual trip reset by external pushbutton.
Earth Leakage Toroid (CT)
Toroid 100/1A (Ampcontrol EL500S series recommended).
Phase Monitoring Toroid
(CT)
Optional; 5A secondary toroid, for monitoring a selected phase current
Zero Crossing (110VAC)
Optional; Phase current zero crossing detection
Communication Interface
Ethernet Socket
Relay 10BASE-TX or 100BASE-TXaccessible via http (using a standard web
browser).
EtherNet IP
Standard Protocol, See below for details
Modbus IP
Standard Protocol, See below for details
Find Out More
For more information on this product, contact Ampcontrol Customer Service on +61 1300 267 373 or
[email protected] or visit the Ampcontrol website: www.ampcontrolgroup.com
9 EQUIPMENT LIST
Part Number
Description
176426
ELV-PRO - Wideband earth leakage relay
179971
ELV-PRO Settings Dongle
115437
Toroid EL500S - 25mm ID
101658
Toroid EL500S - 60mm ID
101656
Toroid EL500S - 112mmID
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APPENDIX A: MINING EARTH LEAKAGE PROTECTION WITH
VARIABLE SPEED DRIVES
The mining working environment presents a range of unique challenges for electrical distribution
systems due to the equipment used and associated hazards. As such, various protection schemes have
evolved to prevent damage to equipment and injury to personnel. In particular, these include:
a) Earth fault current limitation, usually consisting of a resistor connected between the supply
transformer star point and earth, commonly referred to as a Neutral Earthing Resistor (NER).
b) Earth continuity monitoring devices.
c) Earth leakage protection devices.
d) Earth fault lockout protection.
As described in Appendix C of AS/NZS 4871.1:2012, the protection scheme is
Intended to ensure that when persons are exposed to touch potentials, the level of voltage
and time exposed before protection systems trip is limited to an acceptable level
The acceptable levels are given in Figure C1 of the standard for 50 Hz touch voltages.
CAUTION!
Relays designed to operate on earth fault limited systems are not
suitable for direct personal protection.
These protection systems were originally devised to protect against touch potential hazards cause by
earth fault currents driven by the power supply (50 Hz). Consider, for example, that an earth fault occurs
in a mobile machine powered by a trailing cable. The earth fault current will flow through the fault to the
machine frame and return to the supply transformer star point via the trailing cable earth conductors. The
voltage drop caused will result in a potential rise above earth on the frame, presenting a touch potential
hazard. As described in AS/NZS 4871.1:2012 the system assessment must determine the earth fault
limitation current that will protect people based on the achievable earth leakage clearance times and
knowledge of the system in which it is installed.
A1 Variable Speed Drives
Variable speed drives (VSDs) are now finding wide use in mining applications. Most of these drives use variable
frequency outputs that are produced by rectifying the supply to dc and then inverting this voltage back into ac using
a high frequency carrier and pulse width modulation (PWM) to produce variable frequency currents in the motor.
They complicate the situation in several ways:
1) VSDs introduce a new and complex voltage source into the power system. This may mean that earth faults
can now be direct current (dc) in nature or may be driven by the inverter of the drive and so have a
frequency that is primarily that of the drive PWM carrier frequency (1000Hz for example).
2) To minimise interference with protection and control systems, many drives employ electromagnetic
compatibility (EMC or EMI) filters that consist primarily of a capacitive circuit between the input of the drive
and earth. This provides a path for the earth currents that represents an alternative path to the NER, as
shown in the figure below. In fact, it is the intention of the filter to provide this alternative path for the high
frequency currents that flow (through the motor and cable stray capacitances) to earth under normal
conditions. They will also provide an alternative path under fault conditions, particularly if the fault is driven
by the high switching frequency drive output.
It has also been shown that when one or more drives and filters are in use, and an earth fault occurs, there
can be circulating currents between the drives and filters and/or the fault location. The fault current
magnitudes may then greatly exceed the nominal current limitation value (typically 5A) determined by the
NER. These large currents may cause touch potentials that greatly exceed the expected values.
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3) Most earth leakage protection relays approved for use in mining applications are designed to detect 50 Hz
currents, not dc or high frequency currents so the relays may not trip, or if they do trip they may take longer
than expected.
The overall result is that with standard earth leakage protection relays and electrical system assessments based
only on consideration of faults driven by the supply system (50 Hz), protection performance is unlikely to be
adequate when variable speed drives are used in mining applications.
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A2 Improving Protection
The design of earth leakage relays used in mining applications in Australia and New Zealand must comply with
AS/NZS 2081. The latest version of this standard (AS/NZS 2081:2011) better recognises that system protection
needs to be assessed in accordance with AS/NZS 4871.1:2010 and with the changes in the mining electrical
environment.
The following extracts from AS/NZS 2081:2011 provide some key statements of interest:
1.1 Scope
Whereas this standard is based upon 50 Hz supply systems, it is envisaged that the equipment
described may also be installed in systems with higher, lower or variable frequencies, or in dc supplied
systems.
AS/NZS 60479, Part 1 and 2 should be referenced for consideration of the effects at other supply
frequencies upon the human body.
Appendix B:
The diversity of operating conditions and equipment addressed by this Standard precludes reliance
solely on explicitly prescribed trip levels or fault current levels, and their duration, in order to ensure a
safe working environment. Rather, the onus is placed on the system designer to ensure appropriate
touch voltage/operating times when integrating the protection devices addressed by this Standard.
B2 Voltage/duration Thresholds
Design criteria for the protection devices have been chosen to enable compliance to the touch
voltage/operating times for systems operating at 50 Hz as described by Figure B1.
B3 Systems at other than 50 Hz Cyclic Frequency
Where equipment is installed and operated within systems at other than a constant 50 Hz cyclic
frequency, the characteristics in paragraph B2 are not immediately applicable. In such instances,
individual calculation to determine requirements at the frequency or frequencies in question will be
required.
Standards AS/NZS 60479.1 and AS/NZS 60479.2 should be referenced in relation to the effects upon
the human body of other supply frequencies.
What this means is that when VSDs (or other non 50Hz sources) are used in a mining electrical system then the
standard approach needs to be interpreted to ensure that protection is adequate. The key factors to consider are
as follows:
1) The sensitivity of the human body to electric shock varies with frequency. In general, for a given exposure
time, the allowable touch voltage magnitude increases with frequency. For example, at 10 kHz, the “let go”
voltage is about 5 times that level at 50 Hz.
2) When EMC filters are used, this forms a path for earth currents alternative to the NER. When considering
touch potentials at a mobile machine for example, strictly speaking the impedance of the filter at the
frequency of interest should be examined in order to determine the earth fault current that will flow when a
fault occurs in the machine. The earth leakage trip time must then be used to ensure that the touch voltage
and exposure time guarantee a safe system. Care must be taken when multiple filters are connected to a
single supply, as this presents many modes of possible earth fault that need to be considered and actual
earth fault currents may exceed the current seen by any single filter.
3) An earth leakage relay must be able to accurately sense earth fault currents of any frequency from dc to
the maximum frequency of interest.
It can be seen that this is not a trivial matter and it is likely that the industry will need to adapt to this new and
complex environment.
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APPENDIX B: ELV-PRO CURRENT TRANSFORMERS
B1 Earth Leakage Toroids
Toroids (current transformers) are not ideal devices and if correct procedures are not followed during
installation nuisance tripping can result. Consider, for example, 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 toroid 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 toroid has “leakage fluxes”. That is, 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.
B2 Toroid selection
1. Select the smallest internal diameter toroid, which will allow the cables to fit through. Avoid very
large toroids (>200mm aperture) or toroids with square apertures.
2. Only use approved toroids specified by Ampcontrol as these have been designed to minimise
problems.
B3 Toroid installation guidelines
1. Keep cables as close to the center of the toroid as possible. Do not tie them to one side of the
toroid. Remember to aim for symmetry.
2. 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.
3. Avoid placing the toroid near any device that produces magnetic fields. This includes bus bars,
transformers or other cables. Try to maintain several toroid diameters clearance.
4. Many small cables tend to be worse than say, three large ones. Try to position the toroid in the
circuit with this in mind.
5. Toroids used for core balance earth leakage protection cannot have bus bars passed through
them.
6. To prevent possible nuisance tripping it is suggested that the conductor screen of the earth
leakage toroid should be earthed at one end only, the relay end. If both ends are earthed the
possibility exists for the shield to become an earth loop, having finite resistance and injecting
noise into the toroid leads
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APPENDIX C: ELV-PRO CIP OVER ETHERNET/IP
The ELV-PRO communicates with a PLC, implementing CIP (Common Industrial Protocol) over
EtherNet/IP.
C1 ELEMENTARY DATA TYPES
The elementary data types used within this document are taken from table C-2.1 from the CIP
Specification, and are as follows.
Character String Data Types
The declaration of a variable of type STRING is equivalent to declaring a structured data type for the
variable which allocates a UDINT variable containing the current size of the string in characters and an
array of declared character size elements.
Keyword
Description
Range
Minimum
Maximum
BOOL
Boolean
0
1
SINT
Short Integer
-128
127
INT
Integer
-32768
32767
DINT
Double Integer
-231
231-1
LINT
Long Integer
-263
263-1
USINT
Unsigned Short Integer
0
255
UINT
Unsigned Integer
0
65535
UDINT
Unsigned Double Integer
0
232-1
ULINT
Unsigned Long Integer
0
264-1
STRING
Character string (1 byte per
character)
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C2 LIVE DATA SEGMENT DEFINITION
Value
Assemble Instance
100
Size
8
Data Type
UINT
Offset
Value Name
Details
0
Earth Leakage Current
The unbalanced 3-phase current. Value returned in mA.
1
RTC – Data Upper
Upper byte of the RTC number.
The RTC is sent as a standard 32bit number that
represents the number of seconds since 1st January
2000.
2
RTC – Data Lower
Lower byte of the RTC number
3
Trip Mask 1
The 16-bit mask of possible trips
4
Status Mask 1
The 16-bit mask of status updates
5
Internal Temperature
Temperature measured inside the IPX. Value is given
to 1 decimal point by multiplying actual temp by 10.
Range of values is -20˚C to +100˚C.
6
Digital IO
Digital Input status
7
<Reserved>
Reserved
C2.1 Trip Mask 1
Bitmask
Trip Name
Details
0x0001
System Tripped
General Bitmask denoting the system is currently
Tripped
0x0002
Earth Leakage CT
Detect
The Earth Leakage CT is not being detected. This trip
will automatically clear once the CT is detected
0x0004
(Future) DC Shunt
Detect
The DC Shunt CT is not being detected. This trip will
automatically clear once the shunt is detected
0x0008
Relay Fault
The Relay didn’t respond quickly enough or has failed
to go to the desired state
0x0010
ADC Rail Fault
The power rails supplying the external ADC has failed
0x0020
Dongle Tripped
If the Dongle is corrupt or removed the relay will trip
0x0040
Earth Leakage Tripped
An earth leakage current of greater than the specified
limit was detected
0x0080
Digital Input Tripped
The unit was tripped by a change from the Digital Inputs
C2.2 Status Mask 1
Bitmask
Trip Name
Details
0x0001
Storage Fault
Internal Storage fault, either unable to read or write.
0x0002
EEPROM Fault
The EEPROM Isn’t responding or is corrupted
0x0004
RTC Fault
An error has been detected with the Real Time Clock
0x0008
Digital Input Fault
The sampling of the digital inputs are in fault
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C2.3 Digital IO
Bitmask
Trip Name
Details
0x0001
Digital Input 1
User Defined digital Input, 1 = CLOSED INPUT
0x0002
Digital Input 2
User Defined digital Input, 1 = CLOSED INPUT
0x0004
Digital Input 3
User Defined digital Input, 1 = CLOSED INPUT
0x0008
Digital Input 4
User Defined digital Input, 1 = CLOSED INPUT
0x0010
Digital Input 5
User Defined digital Input, 1 = CLOSED INPUT
0x0020
Digital Input 6
External Reset Input, 1 = CLOSED INPUT
C3 CONTROLS
This is a Write Only Class 1 service.
Value
Assemble Instance
150
Size
5
Data Type
UINT
Offset
Value Name
Details
0
Reset Control
Resets various trip types (if safe to do so).
1
Unused
2
Unused
3
Unused
4
Unused
C3.1 Reset Control
This reset bit should only be set by an authorised person. An EL Trip requires investigation by a suitably
trained electrician before being reset. The reset requests occur on the zero to one bit transition.
Transitions from one to zero have no effect. This mask will always read as zero.
Bitmask
Action
0x0001
Trip Reset
Attempts to clear any active trips within the system
Others
Unused
NOTE
Unused bits should not be written. They may be used in future software
versions.
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C4 EXPLICIT MESSAGES
C4.1 ELV-PRO Settings
Class Code: 70 hex
Class Attributes
#
Name
Access
Type
Value
1
Revision
Get
UINT
Object revision (current value = 0001h).
2
Max Instance
Get
UINT
3
Number of
Instances
Get
UINT
Implemented Instances: 1
Instance Attributes
Attribute
ID
Access
Rule
Name
Data Type
Description of Attribute
1
Get
Unit Name
String
User settable name
2
Get
Earth Leakage Trip Level
UINT
Value returned in mA
3
Get
Earth Leakage Trip Time
UINT
Value returned in ms
4
Get
EL Alarm Trip Level
UINT
Value returned in mA
5
Get
EL Alarm Trip Time
UINT
Value returned in ms
6
Get
Alarm Cool Down
UINT
Values returned in seconds
7
Get
EL Mode
USINT
0 = Narrow Band
1 = Wide Band
2 = Weighted Band
8
Get
Digital Input Settings - 1
USINT
See table below
9
Get
Digital Input Settings - 2
USINT
See table below
10
Get
Digital Input Settings – 3
USINT
See table below
11
Get
Digital Input Settings – 4
USINT
See table below
12
Get
Digital Input Settings – 5
USINT
See table below
Digital Input Settings
Value
Digital Input State
Digital Input Action
0
Normally Open
No Action
1
Normally Closed
No Action
2
Normally Open
Generate Log
3
Normally Closed
Generate Log
4
Normally Open
Trip Unit
5
Normally Closed
Trip Unit
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Common Services
Service
Code
Service Name
Description of Service
0E hex
Get_Attribute_Single
Returns the contents of the specified attribute
01 hex
Get_Attributes_All
Returns a predefined listing of this object’s attributes (See
the Get_Attributes_All_Response definition below)
Get_Attributes_All Response Data – Instance Level
Byte
Name
Data Structure
0-19
Unit Name
Byte array String
20-21
Earth Leakage Trip Level
UINT
22-23
Earth Leakage Trip Time
UINT
24-25
EL Alarm Trip Level
UINT
26-27
EL Alarm Trip Time
UINT
28-29
Alarm Cool Down
UINT
30
EL Mode
USINT
31
Digital Input Settings - 1
USINT
32
Digital Input Settings - 2
USINT
33
Digital Input Settings – 3
USINT
34
Digital Input Settings – 4
USINT
35
Digital Input Settings – 5
USINT
C4.2 ELV-Pro Firmware
Class Code: 71 hex
Class Attributes
#
Name
Access
Type
Value
1
Revision
Get
UINT
Object revision (current value = 0001h).
2
Max Instance
Get
UINT
3
Number of
Instances
Get
UINT
Implemented Instances: 1
Instance Attributes
Attribute ID
Access Rule
Name
Data Type
Description of Attribute
1
Get
Firmware Name
String
2
Get
Firmware Version
String
3
Get
Unit Serial Number
String
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Common Services
Service Code
Service Name
Description of Service
0E hex
Get_Attribute_Single
Returns the contents of the specified attribute
C5 EVENT LOGS
The ELV-PRO stores the last 50 events. The events are stored from new to old; as a new event is
created an old event is deleted (provided that the 50 event spaces are full). To allow the PLC to access
these events, the ELV-PRO presents them as 5 instances, each containing 10 encoded event structures.
Instance 1 contains the most recent event logs (with the first attribute containing the most recent event
log). All events stored within an instance can be read using the ‘Get_Attributes_All’ service as described
below.
Class Code: 72 hex
Class Attributes
#
Name
Access
Type
Value
1
Revision
Get
UINT
Object revision (current value = 0001h).
2
Max Instance
Get
UINT
3
Number of Instances
Get
UINT
Implemented Instances: 5
Instance Attributes
Attribute ID
Access Rule
Name
Data Type
Description of Attribute
1
Get
Event Log N
EVENT STRUCT
2
Get
Event Log N+1
EVENT STRUCT
3
Get
Event Log N+2
EVENT STRUCT
4
Get
Event Log N+3
EVENT STRUCT
5
Get
Event Log N+4
EVENT STRUCT
6
Get
Event Log N+5
EVENT STRUCT
7
Get
Event Log N+6
EVENT STRUCT
8
Get
Event Log N+7
EVENT STRUCT
9
Get
Event Log N+8
EVENT STRUCT
10
Get
Event Log N+9
EVENT STRUCT
EVENT STRUCT
Byte Offset
Byte Name
Description
0
Log ID
The log counter where 1 is always the latest log and 50 is
the oldest log.
1-4
Ampcontrol Timestamp
The time at which the event occurred is stored as a 32 bit
number. Add 946684800 to convert to a UTC Time Stamp.
5
Event ID
The Event Type number. This number is defined in
Section 6.2.
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Common Services
Service
Code
Service Name
Description of Service
0E hex
Get_Attribute_Single
Returns the contents of the specified attribute
01 hex
Get_Attributes_All
Returns a predefined listing of this object’s attributes
(See the Get_Attributes_All_Response definition below)
Get_Attributes_All Response Data – Instance Level
Byte
Name
Data Structure
0-5
Event Log, Instance N, Attribute 0
EVENT STRUCT
6-11
Event Log, Instance N, Attribute 1
EVENT STRUCT
12-17
Event Log, Instance N, Attribute 2
EVENT STRUCT
18-23
Event Log, Instance N, Attribute 3
EVENT STRUCT
24-29
Event Log, Instance N, Attribute 4
EVENT STRUCT
30-35
Event Log, Instance N, Attribute 5
EVENT STRUCT
36-41
Event Log, Instance N, Attribute 6
EVENT STRUCT
42-47
Event Log, Instance N, Attribute 7
EVENT STRUCT
48-53
Event Log, Instance N, Attribute 8
EVENT STRUCT
54-59
Event Log, Instance N, Attribute 9
EVENT STRUCT
*NOTE: N ranges from 1-5.
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APPENDIX D: ELV-PRO Modbus TCP
D1 Modbus Commands
The following Modbus commands are supported:
Table 10: Modbus Commands
Modbus CMD
Comment
03
Read Holding Registers
06
Store Single Register
Valid read registers are in the range from 4 to 109. An attempt to read a register outside this range will
result in an exception scan. Supported Modbus exception responses are:
Table 11: Modbus Exception
Modbus Exception
Comment
01
Illegal Function
02
Illegal Data Address
03
Illegal Data Value
D2 Modbus Status
Table 12: Modbus Status
Status
Comment
Address
The Modbus slave address the ELV-PRO is set
to
Read
A solid block when a READ command is
received
Wrt
A solid block when a WRITE command is
received
Exc
A solid block when an unsupported Modbus
command is received
CRC
A solid block when a checksum error is
detected
Par
A solid block when a parity error is detected
NE
A solid block when noise is detected
FE
A solid block when a framing error is detected
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D3 Read Modbus Address Table
Modbus Address
Name
Bit Identification
0-3
Reserved
4
Earth Leakage
Current
The unbalanced 3-phase current. mA returned.
5
RTC – Data Upper
The RTC is sent as a standard 32bit number that represents the
number of seconds since 1st January 2000. RTC upper byte number.
6
RTC – Data Lower
RTC lower byte of number.
7
Trip Mask 1
Bit
Description
0
System Tripped
1
Earth Leakage CT Detect
2
(Future) DC Shunt Detect
3
Relay Fault
4
ADC Rail Fault
5
Dongle Tripped
6
Earth Leakage Tripped
7
Digital Input Tripped
8-15
Reserved
8
Status Mask 1
Bit
Description
0
Storage Fault
1
EEPROM Fault
2
RTC Fault
3
Digital Input Fault
4-15
Reserved
9
Internal Temperature
Temperature measured inside the IPX. Value is given to 1 decimal
point by multiplying actual temp by 10. Range of values is -20°C to
+100°C.
10
Digital IO
Bit
Description
(0 = open, 1 = closed)
0
Digital Input 1
1
Digital Input 2
2
Digital Input 3
3
Digital Input 4
4
Digital Input 5
5
Digital Input 6
6-15
Reserved
11-17
Reserved
18-25
Software Version
Uint16 encoded String
26-33
Serial Number
Uint16 encoded String
34-39
Reserved 44-54
ELV PRO Name
Uint16 encoded String
55
EL Trip Level
Value returned in mA
56
EL Trip Time
Value returned in ms
57
EL Alarm Level
Value returned in mA
58
EL Alarm Time
Value returned in ms
59
Alarm Cool Down
Value returned in Seconds
60
EL Mode
0 = Narrowband
1 = Wideband
2 = Weighted
61
Reserved
62
Digital Input Settings
– 1
0 – Normally Open, No Action
1 – Normally Closed, No Action
63
Digital Input Settings
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Modbus Address
Name
Bit Identification
– 2
2 – Normally Open, Generate Log
3 – Normally Closed, Generate Log
64
Digital Input Settings
– 3
65
Digital Input Settings
– 4
66
Digital Input Settings
– 5
67-79
Unused
80-82
Most Recent Log
Details
Word 0 – Ampcontrol Timestamp Upper 16 bits
Word 1 – Ampcontrol Timestamp Lower 16 bits
Word 2 – Event ID
83-85
Log Details
86-88
Log Details
89-91
Log Details
92-94
Log Details
95-97
Log Details
98-100
Log Details
101-103
Log Details
104-106
Log Details
107-109
Oldest Log Details
D4 Uint16 Encoded String
To help with efficient data transfer, all strings transmitted via Modbus have been ‘compressed’ to contain
two characters per 16bit word, with the upper byte containing the first character and the lower byte
containing the second character. The characters themselves are encoded using the ASCII encoding
standard and are terminated with a NULL character. Note: data returned after the NULL character should
be ignored as its value is undefined.
Eg the string ‘Hello’ will be encoded as
0x4865, 0x6c6c, 0x6f00
D5 Write Modbus Address Table
Modbus Address
Name
Bit Identification
0
Reset Control
Bit
Description
0
Reserved
1
Trip Reset
2-15
Reserved
1-3
Reserved
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APPENDIX E: ELV-PRO Default Settings
The following settings are considered the factory default settings. Default settings will be utilised on an
ELV-PRO that is booted with no dongle installed or when booted with a brand new dongle installed. If the
ELV-PRO is booted with a brand new dongle installed, settings will not be saved to the dongle until a
setting is modified. When a brand new dongle is installed into a powered and running ELV-PRO, the
dongle will only be updated once a setting is modified.
If a dongle has been configured or has been initialised from another ELV-PRO, then the settings may not
match those in the table below. If a dongle is removed when in operation the settings will not be altered.
WARNING!
Ampcontrol recommends the user review the configured settings before
operating equipment.
Parameter
Setting
Trip Level
150mA
Trip Time
50mS
Alarm Level
0mA
Alarm Time
0mS
Alarm Lockout
5mS
EL Mode
2
Input 1 Polarity
Normally Open
Input 1 Action
None
Input 2 Polarity
Normally Open
Input 2 Action
None
Input 3 Polarity
Normally Open
Input 3 Action
None
Input 4 Polarity
Normally Open
Input 4 Action
None
Input 5 Polarity
Normally Open
Input 5 Action
None
Periodic Log Time
0
DHCP
NO
Static IP Address
10.1.1.10
Static IP Mask
0.0.0.0
Static IP Gateway
0.0.0.0
Admin Password
"Password"
Unit Name
"ELV-Pro Unit"
User Password
"reset"
NTP Server Enabled
No
NTP Server IP
0.0.0.0
UTC Offset
+0Hr
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