Integra Ri3 User manual

INTEGRA Ri3 digital metering system
DIN Rail Digital Energy Meter for
Single- and Three-phase Electrical Systems
Installation and Operating Instructions

2
Symbols used in this document:
Risk of Danger: These instructions contain important safety information:
Read them before starting installation or servicing of the equipment
Caution: Risk of Electric Shock
Important safety information is contained in the
Maintenance section. Familiarise yourself with this
information before attempting installation or other
procedures.

Contents
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Contents
1Introduction 5
1.1 Unit Characteristics..................................................................5
1.2 Current Transformer Primary Current......................................5
1.3 RS485 Serial - Modbus™ or JC N2Protocol............................5
1.4 Pulse Output ............................................................................6
2Start Up Screens 6
3Measurements 6
3.1 Voltage and Frequency ...................................................6
3.2 Current ............................................................................7
3.3 Power and Power Factor .................................................7
3.4 Energy Measurements ....................................................7
4Setting Up 8
4.1 Set-up Menu Structure.............................................................8
4.2 Set-up Entry Methods ..............................................................9
4.2.1 Menu Option Selection.............................................................9
4.2.2 Number Entry Procedure .........................................................9
4.3 Change Password..................................................................10
4.4 Supply System.......................................................................10
4.5 dIT Demand Integration Time ................................................11
4.6 CT..........................................................................................11
4.7 RSET - Reset.........................................................................12
4.8 Communications....................................................................12
4.9 Pulse Output ..........................................................................15
4.10 Energy Units and 1% Limit.....................................................17
4.11 Test........................................................................................18
4.12 Version Information................................................................20
5Specification 21
5.1 Measured Parameters ...........................................................21
5.1.1 Voltage and Frequency..........................................................21
5.1.2 Current...................................................................................21
5.1.3 Power and Power Factor .......................................................21
5.1.4 Energy Measurements...........................................................21
5.2 Measured Inputs ....................................................................21
5.2.1 Range of Use.........................................................................22
5.3 Accuracy................................................................................22

Contents
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5.4 Auxiliary Supply......................................................................22
5.5 Interfaces for External Monitoring ..........................................23
5.5.1 Pulse Relay Output ................................................................23
5.5.2 RS485 Output for Modbus™ or JC N2 Protocol....................23
5.6 Reference Conditions of Influence Quantities........................24
5.7 Environment...........................................................................24
5.8 Mechanics..............................................................................24
5.9 Approval, Certification, and Standards Compliance...............24
6Maintenance 25
7Installation 26
7.1 Safety.....................................................................................26
7.2 EMC Installation Requirements..............................................26
7.3 Case Dimensions...................................................................27
7.4 Wiring.....................................................................................27
7.4.1 Additional considerations for three wire systems...................28
7.5 Auxiliary Supply......................................................................28
7.6 Fusing.....................................................................................28
7.7 Earth/Ground Connections.....................................................28
7.8 Connection Diagrams.............................................................28
7.9 RS485 and Modbus™ or JC N2 Protocol...............................29
7.10 Operation Check ....................................................................29
8Glossary 30
9Index 31

Introduction
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1 Introduction
This document provides operating, maintenance and installation instructions for the Crompton
Instruments Integra Ri3 DIN rail mounted energy meter. The unit measures and displays the
characteristics of single phase, three-phase 3-wire or three-phase 4-wire supplies, including
voltage, frequency, current, power and real and reactive energy, imported or exported. Energy is
measured in terms of Wh, kWh, MWh, VArh, kVArh and MVArh, since it was last reset. Maximum
demand current can be measured over preset periods of up to 60 minutes. In order to measure
energy, the unit requires voltage and current inputs in addition to the supply required to power the
product. The requisite current input(s) are obtained via current transformers (CT).
The Ri3 can be configured to work with a wide range of CTs, giving the unit a wide range of
operation. Built-in interfaces provide pulse and RS485 Modbus™/JC N2 outputs. Configuration is
password-protected.
The unit can be powered from a separate auxiliary (a.c. or d.c.) supply. Alternatively it can be
powered from the monitored supply, where appropriate.
1.1 Unit Characteristics
The Ri3 can measure and display:
Line voltages and THD% (total harmonic distortion) of all phases
Line frequency
Currents, current demands and current THD% of all phases
Power, maximum power demand and power factor
Active Energy (Wh, kWh or MWh) imported and exported
Reactive Energy (VArh, kVArh or MVArh) imported and exported
The unit has password-protected set-up screens for:
Changing password.
Supply system selection 1ph, 3ph3w or 3ph4w.
CT primary current (1 to 9999A)
Demand interval time
Reset for cumulative energy and demand measurements
Pulse output duration and rate divisor
RS485 serial Modbus™ or JC N2 format
A pulsed relay output indicates real-time energy measurement. An RS485 output allows remote
monitoring from another display or a computer.
1.2 Current Transformer Primary Current
The unit can be configured to operate with CT primary current of between 1 and 9999A. Maximum
CT primary current corresponds to a maximum input current to the unit of 5A.
1.3 RS485 Serial - Modbus™ or JC N2Protocol
This uses an RS485 serial port with Modbus™ or Johnson Controls (JC) N2 protocol to provide a
means of remotely monitoring and controlling the Ri3 unit.
Set-up screens are provided for setting up the RS485 port. See Section 4.8.

Measurements
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1.4 Pulse Output
This provides a relay pulse output that clocks up measured active (Wh) or reactive (VArh) energy.
The unit can produce one pulse for preset quantity of energy imported or exported. The pulse
divisor and pulse width can be set from the Set-up menu as detailed in Section 0.
2 Start Up Screens
The first screen lights all display segments and can be used as a
display check.
The second screen indicates the firmware installed in the unit and
its build number. This example shows a firmware version of 2.510
and a build number of 21.07.
Next the unit performs a self-test and indicates if the test passes.
After a short delay, the last-used measurement screen appears.
3 Measurements
The buttons operate as follows:
Selects the Voltage and Frequency display screens.
In Set-up mode, this is the ‘Back’ button.
Selects the Current display screens.
In Set-up mode, this is the ‘Up’ button.
Selects the Power and Power Factor screens.
In Set-up mode, this is the ‘Down’ button.
Selects the Energy display screens.
In Set-up mode, this is the ‘Enter’ button.
3.1 Voltage and Frequency
Each successive pressing of the button selects a new range:
Phase to neutral voltages (not 3p3w mode)
Voltages between phases (three phase supplies only)
Frequency in Hz

Measurements
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Percentage total voltage harmonic distortion (THD%) for each phase to N (not 3p3w mode)
Percentage voltage THD% between phases (three phase supplies only)
3.2 Current
Each successive pressing of the button selects a new range:
Current on each phase
Neutral current (three phase supplies only)
Maximum demand currents on each phase since the last Demand reset
Maximum neutral demand current since the last Demand reset (three phase supplies only)
Current THD% for each phase
3.3 Power and Power Factor
Each successive pressing of the button selects a new range:
Instantaneous power:
Power in kW or MW
Reactive Power in kVAr or MVAr
Volt-amps in kVA or MVA
Maximum demanded power since last Demand reset
Power factor
The unit automatically chooses an appropriate unit of power (x1, kilo or Mega).
If the 1% Limit option is set to On (Section 4.10), readings below 1% of maximum for the range will
be displayed as zero.
3.4 Energy Measurements
Each successive pressing of the button selects a new range:
Imported energy in kWh or MWh
Exported energy in kWh or MWh
Imported reactive energy in kVArh or MVArh
Exported reactive energy in kVArh or MVArh
This is a two-line display that can indicate up to 9999999.9. This
example shows that 20133.7 kWh of energy has been imported since the
last energy hours reset.
The blue man symbol flashes during the accumulation of Wh or VArh
data at a rate determined by the associated instantaneous power
parameter.
The displayed unit/kilo/mega (e.g. Wh, kWh or MWh) parameter is set in Set-up mode (see Section
4.10).
If the 1% Limit option is set to On (Section 4.10). readings below 1%of range maximum will not be
included in the energy computation, to prevent meter ‘creep’. The 1% symbol appearing in the
bottom left-hand corner of the display indicates that the 1% Limit option is off and that power
values below 1% of range maximum will accrue to the total energy value.

Setting Up
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4 Setting Up
To enter set-up mode, firmly press the and buttons simultaneously and hold for about 5
seconds, until the password screen appears. Setting up is password-protected so you must enter
the correct password (default ‘0000’) before proceeding. If an incorrect password is entered, the
display reverts to measurement mode.
To exit setting-up mode, press repeatedly until the measurement screen is restored or hold
and buttons simultaneously for 5 seconds.
4.1 Set-up Menu Structure
Change password
nnnn 4-digit number – default ‘0000’.
Supply system
3-phase 4-wire
3-phase 3-wire
single phase.
CT Set the value of the CT primary in use
nnnn – 4-digit number 0001 to 9999.
dIT Demand Integration Time
This is the period in minutes over which the current and power readings are integrated for
maximum demand measurement. Options are: Off, 5, 8, 10, 15, 20, 30 and 60 minutes.
RSET Resets cumulative Energy and/or Demand measurement to zero.
COMS - Communication parameters for RS485 interface
FMT - Format
Modb - Modbus™ protocol
Baud rate 2400/4800/9600/19200/38400
Parity none/odd/even
Stop bits 1 (1 or 2 if parity is None)
RS485 network address nnn – 3-digit number, 1 to 247
Order::Norm/Rev – Indicates if the Modbus™ word order is normal or reversed.
N2 Johnson Controls (JC) N2 protocol
RS485 network address nnn – 3-digit number, 1 to 255.
Rly - Relay pulse output
kWh/kVArh (Active/reactive) Import or Export
Rate 0.001/0.01/0.1/1/10/100/1k/10k kWh or kVArh per pulse
Pulse width 200/100/60 ms.
NRGy - Energy
Unit/kilo/Mega units selection
1% limit on/off. If on, power values <1% of range max. will not be included in energy
measurements (prevents ‘creep’).
Test Display on – all elements on to check display
dISTG Display toggle. Each element is turned on and off alternately
Phase sequence (V123 I123).
SOFT Firmware version and build numbers.

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4.2 Set-up Entry Methods
Some menu items, such as password and CT, require a four-digit number entry while others, such
as supply system, require selection from a number of menu options.
4.2.1 Menu Option Selection
1. Use the (up) and (down) keys to select the required item from the menu shown in
Section 4.1. Selection does not roll over between bottom and top of list.
2. Press to confirm your selection.
3. If an item flashes (shown red on these pages), then it can be adjusted by the (up) and
(down) keys. If not, there may be a further layer, e.g. Comms - Baud rate, before
adjustment is possible. Press to select the lower layer.
4. Having selected an option from the current layer, press to confirm your selection. The
SET indicator will appear.
5. Having completed a parameter setting, press to return to a higher menu level. The SET
indicator will be removed and you will be able to use the and keys for further menu
selection.
6. On completion of all setting-up, press repeatedly until the measurement screen is
restored.
4.2.2 Number Entry Procedure
When setting up the unit, some screens require the entering of a number. In particular, on entry to
the setting up section, a password must be entered. Digits are set individually, from left to right.
The procedure is as follows:
1. The current digit to be set flashes (shown red on these pages) and is set using the
(up) and (down) keys.
2. Press to confirm each digit setting. The SET indicator appears after the last digit has
been set.
3. After setting the last digit, press to exit the number setting routine. The SET indicator will
be removed.

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4.3 Change Password
1. Use the (up) and (down) to choose the Change Password option.
2. Press to enter the change password routine. The New Password screen
will appear with the first digit flashing.
3. Use and to set the first digit and press to confirm your selection.
The next digit will flash.
4. Repeat the procedure for the remaining three digits.
5. After setting the last digit, SET will show.
6. Press to exit the number setting routine and return to the Set-up menu.
SET will be removed.
4.4 Supply System
Use this section to set the type of power supply being monitored.
1. From the Set-up menu, use the (up) and (down) keys to select the
System option. The screen will show the currently selected supply option.
2. Press to enter the Supply Selection routine. The current selection will
flash.
3. Use the (up)and (down) keys to select the required system option:
or
3-phase 4-wire 3-phase 3-wire Single phase.
4. Press to confirm your selection. SET indicator will appear.
5. Press to exit the system selection routine and return to the menu. SET will
disappear and you will be returned to the main Set-up menu.

Setting Up
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4.5 dIT Demand Integration Time
This sets the period in minutes over which the Current and Power readings are integrated for
maximum demand measurement. The options are Off, 5, 8, 10, 15, 20, 30, and 60 minutes.
1. From the Set-up menu, use the (up) and (down) keys to select the
dIT option. The screen will show the currently selected integration time.
2. Press to enter the selection routine. The current time interval will flash.
3. Use the (up) and (down) keys to select the required option from Off (no
integration time) to 60 minutes.
4. Press to confirm your selection. SET indicator will appear.
5. Press to exit the dIT selection routine and return to the menu. The SET
indicator will be removed and you will be returned to the main Set-up menu.
4.6 CT
The CT option sets the maximum primary current (1 to 9999A) of the current transformer (CT) that
will give 5A into the meter (the maximum).
1. From the Set-up menu, use the (up) and (down) keys to select
the CT option. The screen will show the current CT primary current value.
An ‘A’ to the right of the lower line indicates that the reading is in amps.
2. Press to enter the CT primary current selection routine. The first digit
will flash.
3. Use the method described in Section 4.2.2 to set the 4-digit number to the maximum CT
primary current, e.g. 500A.
4. On completion of the entry procedure, press to return to the main Set-
up menu.

Setting Up
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4.7 RSET - Reset
Use this option to restart Energy Hours (kWh, kVArh) and/or Current/Power Demand
measurements from zero. These can be set individually or all together.
1. From the main Set-up menu, use the (up) and (down) keys to
display the Reset screen.
2. Press . ‘dMd’ will flash.
3. Use the (up) and (down) keys to select which counter(s) you wish to reset:
Demand (dMd), Energy hours (hour), or both (ALL).
4. Press to reset the selected counter. RSET will be displayed and the
flashing will stop.
5. Press to exit the Reset routine. RSET will clear and you will be
returned to the main Set-up menu.
4.8 Communications
The RS485 port can be used for communications using either Modbus™ or Johnson Controls (JC)
N2 protocol. For Modbus™, parameters such as Baud rate are selected from the front panel
whereas for JC N2 they are fixed. The RS485 address can be selected for both protocols.
The first section allows you to select either Modbus™ or JC N2 configuration.
1. From the main Set-up menu, use the (up) and
(down) keys to display the Communications screen.
2. Press . The Format screen will appear showing the
current format – Modb or N2.
3. To change the format, press . The format will flash.
4. Use the or key to change the format.
5. Press to confirm your selection. SET will be displayed.

Setting Up
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6. Press to exit the format selection routine. SET will be
removed.
If you have selected N2 format, you can use the or key to select the RS485
address option and set it as detailed on page 14.
If you have selected ModB format, set the serial parameters as follows:
7. Use the or key to cycle through the Baud, parity,
stop bits and address menu options.
Baud Rate (not applicable for JC N2)
8. To change the Baud setting, ensure that the display shows the
Baud setting and press to enter the setting routine. The
digits will flash.
9. Use the and keys to select the desired Baud rate
from the available options: 9600, 4800, 2400, 38.4k (38400)
and 19.2k (19200).
10. Press to confirm your Baud rate selection. SET will be
displayed.
11. Press to exit Baud setting routine. SET will go off and the
and keys can be used to select a different Comms
parameter.
Parity (not applicable for JC N2)
Note that if parity is set to Odd or Even, Stop Bits will be set to 1 and cannot be changed.
12. Use the and keys to select the Parity option.
13. Press to enter the parity setting routine. The parameter
will flash.
14. Use the and keys to select the desired parity option
from None, Even and Odd.

Setting Up
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15. Press to confirm your selection. SET will be displayed.
16. Press to exit parity setting routine. SET will go off and
the and keys can be used to select a different
Comms parameter.
Stop Bits(not applicable for JC N2)
Note that, if Parity is set to Odd or Even, Stop Bits will be set to 1 and cannot be changed.
17. Use the and keys to select the Stop Bits option.
18. Press to enter the Stop Bits setting routine. The
parameter value will flash.
19. Use the and keys to select the desired number of
Stop Bits – 1 or 2.
20. Press to confirm your selection. SET will be displayed.
21. Press to exit Stop Bits setting routine. SET will go off and
the and keys can be used to select a different
Comms parameter.
RS485 Address
An RS485 network can accommodate up to 255 different devices, each identified by an
address between 1 and 247 (Modbus™) or 1 and 255 (JC N2).
22. Use the and keys to select the Address option.
23. Press to enter the Address setting routine. The first digit
will flash.
24. Use the method described in Section 4.2.2 to set the 3-digit
address to the required number between 1 and 247 for
Modbus™ or 1 and 255 for JC N2.

Setting Up
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5
Modbus™ Word Order (not applicable for JC N2)
This screen shows the word order (Hi/Lo) of the 8-bit bytes in the
Modbus™ message format. Normal is Hi first. This setting can only be
changed from the Modbus port. See the Cix Communications Guide for
further information
4.9 Pulse Output
This option allows you to configure the pulse output. The output can be set to provide a pulse for a
defined amount of energy imported or exported. The energy monitored can be active or reactive
and the pulse width can be selected as 200, 100 or 60 ms.
The pulse rate output is limited to a maximum of two pulses per second. It is not possible to set an
energy-per-pulse that will result in a pulse rate that is greater than this. For example, on a single-
phase, two-wire system, a CT setting of 900A with a maximum 289V supply implies a maximum
energy imported or exported in an hour of 900 x 289 = 260 kWh which is 72 W.seconds. A setting
of 10Wh per pulse would generate 7 pulses per second. Since this exceeds 2/s, the unit would not
allow such a setting.
Use this section to set up the relay pulse output –
Units Import kWh, export kWh, import kVArh, export kVArh
Rate 0.001/0.01/0.01/0.1/1/10/100/1k/10k kilo/pulse
Pulse width 200/100/60 ms.
1. From the main Set-up menu, use the (up) and (down) keys to
display the Relay screen.
2. Press . The Relay Import/Export range screen will appear.
3. Press to enter the Import/Export range selection routine. The displayed
value will flash.
4. Use the (up) and (down) keys to select the required option– none
or import/export and units.
5. Press to confirm your selection. SET will appear.
6. Press to exit Output setting routine. SET will be removed and the
and keys can be used to select a different Relay parameter.

Setting Up
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Rate
Use this to set the energy represented by each pulse. Rate can be set to generate 1 pulse per
0.001 = 1 Wh/VArh
0.01 = 10 Wh/VArh
0.1 = 100 Wh/VArh
1 = 1 kWh/kVArh
10 = 10 kWh/kVArh
100 = 100 kWh/kVArh
1k = 1 MWh/MVArh
10k = 10 MWh/MVArh
The rate cannot be set to a value that could result in more than 2 pulses per second.
7. Use the (up) and (down) keys to select the Rate screen.
8. Press to enter the Rate setting routine. The Rate value will
flash. The Rate is the energy that each output pulse represents.
9. Use the (up) and (down) keys to select the Rate required
for the pulse output.
10. Press to confirm your selection. The SET indicator will appear
and the display will stop flashing.
11. Press to exit the Rate setting routine. The SET indicator will be
removed and the and keys can be used to select a
different Relay parameter.
Pulse Duration
Use this option to set the duration of pulses (in ms). Pulse duration can be set to 60, 100 or 200
ms.
12. Use the (up) and (down) keys to select the Pulse screen.
13. Press to enter the Pulse Width setting routine. The value will
flash.
14. Use the (up) and (down) keys to select the Pulse Width in
ms.

Setting Up
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15. Press to confirm your selection. The SET indicator will appear
and the display will stop flashing.
16. Press to exit Pulse Width setting routine. SET will disappear
and the and keys can be used to select a different Relay
parameter.
4.10 Energy Units and 1% Limit
Use this option to set the displayed energy units multiplier and to set a 1% limit on measured
energy on or off.
The unit multiplier can be set to Wh/VArh (x1), kWh/kVArh (kilo) or MWh/MVArh (Mega).
To prevent noise from being recorded and causing ‘meter creep’, a 1% limit can be imposed on the
measured input such that energy readings less than 1% of maximum are not recorded. This limit
can be turned off so that even small energy increments are recorded.
1. Use the (up) and (down) keys to select the Energy
screen.
2. Press to select the Energy menu.
At this stage, you can use the and keys to select either the Energy Units or 1%
Limit menu.
Energy Units
3. With the Unit screen selected, press to enter the Units
setting routine. The currently selected unit flashes.
4. Use the (up) and (down) keys to select the required
units: x1, kilo or Mega.
5. Press to confirm your selection. SET will appear and the
display will stop flashing.

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6. Press to exit Units setting routine. SET will be removed.
1% Limit
With the 1% Limit On, line noise below 1% of maximum power will be displayed as zero and
will not accrue to the energy reading. With Limit Off, the 1% symbol will be appear on the
power and energy screens to show that low power readings will be displayed and utilised.
7. Use the (up) and (down) keys to select the Limit
screen.
8. Press to enter the Limit setting routine. The value will flash.
9. Use the (up) and (down) keys to turn the 1% limit on
or off.
10. Press to confirm your selection. SET will appear and the
display will stop flashing.
11. Press to exit 1% Limit setting routine. SET will be removed.
12. Press again to exit the Limit menu and return to the main
Set-up menu.
4.11 Test
This option provides various test facilities.
1. Use the (up) and (down) keys to select the Test screen.
2. Press to enter the Test menu.
3. Use the and keys to select the required test option and press to
confirm your selection. The available options are:

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Lights all LED segments so that display segments can be
checked.
Press to exit.
Toggles display segments alternately.
Press to exit.
Shows the voltage and current phase sequences.
Press to exit.
4. Press to exit the selected test display mode.
5. Press again to return to the main Set-up menu.
For the voltage and current phase sequence test to operate reliably, voltage and current inputs
must be greater than 5% of nominal.
The Phase Sequence display shows the phase relationships of the supply voltages and currents.
To obtain correct power, voltage and current readings, the indicated phase sequences should be
‘123’.
To obtain sequence test indications, the measured phase relationships must be within the following
parameters.
Three-phase four-wire mode
Measurements are referenced from L1.
Voltage:
For the voltage sequence test, the phase of L2 relative to L1 must be within the window 240 +/-
48 degrees and L3 relative to L1 must be within the window 120 +/- 48 degrees to record the
sequence V123.
Alternatively, the phase of L2 relative to L1 must be within the window 120 +/- 48 degrees and
L3 relative to L1 must be within the window 240 +/- 48 degrees to record the sequence V132.
The display shows ‘V1--‘ if a voltage phase is outside these parameters.
Current:
For the current sequence test, the phase of I1 relative to L1 must be within the window 0 +/- 48
degrees and I2 relative to L1 must be within the window 240 +/- 48 degrees and I3 relative to
L1 must be within the window 120 +/- 48 degrees to record the sequence i123.
Alternatively the phase of I1 relative to L1 must be within the window 0 +/- 48 degrees and I2
relative to L1 must be within the window 120 +/- 48 degrees and I3 relative to L1 must be within
the window 240 +/- 48 degrees to record the sequence i132.

Specification
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The display shows ‘I --‘ if a current phase is outside these parameters.]
Three-phase three-wire mode
Measurements are referenced from L1-L2.
Voltage:
For the voltage sequence test, the phase of L2-L3 relative to L1-L2 must be within the window
240 +/- 48 degrees and L3-L1 relative to L1-L2 must be within the window 120 +/- 48 degrees
to record the sequence V123.
Alternatively, the phase of L2-L3 relative to L1-L2 must be within the window 120 +/- 48
degrees and L3 relative to L1-L2 must be within the window 240 +/- 48 degrees to record the
sequence V132.
The display shows ‘V1--‘ if a voltage phase is outside these parameters.
Current:
For the current sequence test, the phase of I1 relative to L1-L2 must be within the window 330
+/- 48 degrees and I2 relative to L1-L2 must be within the window 210 +/- 48 degrees and I3
relative to L1-L2 must be within the window 90 +/- 48 degrees to record the sequence i123.
Alternatively, the phase of I1 relative to L1-L2 must be within the window 330 +/- 48 degrees
and I2 relative to L1-L2 must be within the window 90 +/- 48 degrees and I3 relative to L1-L2
must be within the window 210 +/- 48 degrees to record the sequence i132.
The display shows ‘I --‘ if a current phase is outside these parameters.
4.12 Version Information
The last option of the Set-up menu show the versions of firmware and hardware of the unit. Use
the and keys to scroll through the Set-up menu options.
Firmware version (2.51)
Build (21.07)
Setting Up