Secure PT3 Series Product manual

PT3 transducer range
Technical reference manual
BGX701-014-R03

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BGX701-014-R03, User Manual for PT3 Transducers
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Copyright © 2020, SIHPL

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Table of Contents
1Preface.........................................................................................................................................5
1.1 Purpose and audience ..................................................................................................................................5
1.2 Abbreviations.................................................................................................................................................5
1.3 Related documentation .................................................................................................................................5
2Disclaimer....................................................................................................................................6
3Important safety information......................................................................................................7
3.1 Safety during installing/ uninstalling and servicing........................................................................................7
3.2 Disposal.........................................................................................................................................................7
3.3 Maintenance..................................................................................................................................................7
4Introduction to three-phase transducers...................................................................................8
4.1 Physical features ...........................................................................................................................................9
4.2 Communication ports (RS-485 and USB) .....................................................................................................9
5Technical specifications...........................................................................................................10
5.1 PT3 output signals.......................................................................................................................................15
6Configuring PT3 transducers...................................................................................................17
6.1 Procedure to configure PT3 in Online mode...............................................................................................17
6.2 Procedure to configure PT3 in Offline mode...............................................................................................18
6.3 Changing the customer serial number in the transducer ............................................................................18
6.4 Printing/exporting label for PT3 transducer.................................................................................................18
7Installing PT3 transducers .......................................................................................................20
7.1 PT3 transducer dimensional details............................................................................................................20
7.2 Mounting the PT3 transducer on a DIN rail.................................................................................................20
7.3 Demounting the PT3 transducer .................................................................................................................21
8PT3 network connections.........................................................................................................23
9Modbus mapping ......................................................................................................................29
9.1 Introduction..................................................................................................................................................29
9.2 References..................................................................................................................................................29
9.3 Modbus settings ..........................................................................................................................................29
9.3.1 Connections..................................................................................................................................29
9.3.2 Slave address...............................................................................................................................29
9.3.3 Register addresses.......................................................................................................................29
9.3.4 Serial port settings........................................................................................................................29
9.3.5 Modbus function codes.................................................................................................................30
9.3.6 Registers.......................................................................................................................................30
9.4 Supported reading parameters for different PT3 network connections.......................................................32
9.5 Reading holding registers............................................................................................................................33
10 Troubleshooting........................................................................................................................36

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11 Frequently asked questions (FAQs) ........................................................................................38

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1 Preface
1.1 Purpose and audience
This manual provides the information necessary to configure, install, and use the PT3 range of transducers. The
information in the manual is intended for use by technically qualified commissioning and operating personnel in
power systems and process industries. Troubleshooting suggestions and answers to FAQs are included to
assist in the installation and operation of the PT3 transducers.
1.2 Abbreviations
Following is a list of abbreviations used in this manual:
Abbreviation
Description
PT
Programmable transducers
FAQs
Frequently asked questions
RMS
Root mean square
HDD
Hard disk drive
CT
Current transformer
AC
Alternating current
DC
Direct current
USB
Universal serial bus
MFT
Multi-function transducer
PDU
Protocol data unit
1.3 Related documentation
The ConfigView software tool is used to set up all the configurable features in PT3 transducers. You can
download the ConfigView software and associated documentation free of cost, from our website:
www.securemeters.com.
Note:
We recommend use of the latest version of ConfigView software for programming PT3 transducers.

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2 Disclaimer
Secure Meters assumes no responsibility for damages caused to the PT3 transducer unit under following
circumstances:
1. Improper maintenance/installation
2. Normal (or abnormal) wear and tear of insulation
3. Accidental contact with hazardous elements

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3 Important safety information
Local best practice and regulatory stipulations must always be observed. In addition, safety precautions
recommended for installation of electrical equipment should be strictly adhered to. Transducers should be
installed by trained personnel only.
The following symbols have been used in this document or appear on the product.
Risk of electric
shock Caution Alternating current (AC) Direct current (DC) Double Insulation
3.1 Safety during installing/ uninstalling and servicing
1 Use insulated crimp terminations to make voltage and current connections. Ensure that
the terminal block insulation requirements are always met.
2 Read the information provided on the rating plate carefully before making the
connections or installing/uninstalling the transducers. The rating plate is available on
the right-hand side of the device.
3 Use a switch or circuit breaker to disconnect the auxiliary supply to the transducers.
Mark it suitably and keep it handy for quick access to ensure appropriate safety.
4 If the equipment is not used in the manner specified in the manual, the protection
provided by the equipment may be impaired.
1 Do not touch any exposed terminals during installing/uninstalling or maintenance as
hazardous voltages are present, which constitute a major risk of electrical shock and
can cause severe and permanent injury.
2 Before switching on the transducer device, verify that all connections to the network
have been correctly made.
3 Do not open the secondary circuit of a live CT as the high voltage produced could be
lethal or cause severe injury.
4 Disconnect the power supply before installing the transducer within a panel. The same
instructions should be followed for uninstalling the device.
3.2 Disposal
PT3 transducers should be disposed of in a safe and responsible manner. The regulations applicable within the
country of operation for disposal of the product should be followed.
3.3 Maintenance
PT3 transducers normally require no maintenance. To ensure a robust user experience, please adhere to the
environmental and technical specifications provided by the manufacturer. For any further queries, you may
contact the nearest sales representative.

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4 Introduction to three-phase transducers
The PT3 transducer is suitable for measuring, monitoring and analysing three-phase industrial and supply
applications. It is available with up to four analogue outputs and can accurately measure electrical quantities
such as current, voltage, active power, reactive power and power factor by converting them into proportional DC
current or voltage analogue signals (For e.g. 0-10 V, 0-2mA, 4-20 mA etc.). The output signal that is generated
is proportional to the true RMS value of the input signal.
Salient features
•Available in single-function and multi-function variants
•Available with high or low auxiliary power supply options
•Has two or four, galvanically isolated, load independent analogue outputs
•Has a loop impedance support of ≤750 Ω for current and ≥2 kΩ for voltage outputs (independent of
analogue outputs used)
•Provides a full-scale accuracy class of 0.2, 0.5 or 1.0
•Offers a response time of < 220 ms
•Offers fast sampling rates and accurate RMS measurements over a long range
•Measures V, I, PF, active and reactive power, load PF, apparent power and frequency
•Can be configured onsite for required input measurement range, output type (either mA or V) and curves
•Multiple functions can be configured as input for multi-function transducers. Different input functions can be
assigned for measurement to each of the four output channels or a single input function can be assigned to
all channels.
•Easily configurable through micro USB port without the need for power supply
•LEDs for signalling Power ON and diagnostics
•Top hat DIN Rail mountable as per EN50022

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4.1 Physical features
The figure below provides an illustrated reference to the main parts of the PT3 transducer device.
Figure 1: PT3 transducer physical features
Note:
A terminal will be marked as ‘NC’ when it is not available for use. NC refers to a non-connected terminal.
4.2 Communication ports (RS-485 and USB)
The PT3 is equipped with a micro USB port. In addition the MFT variant has an RS-485 port.
•The USB point-to point connection port is used for configuring the PT3 transducer in the field. For details on
configuration refer section 6.
•The RS485 communication port is used for reading instantaneous parameters using the MODBUS RTU
protocol. For details refer section 9.

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5 Technical specifications
Environmental and safety specifications
Protection class
II (double insulation) EN 61010-1
Pollution degree
2
Ingress protection Protection enclosure - IP 40, terminals and USB - IP 20
(EN 60529)
Temperature Operating range -5
°
C to + 55
°
C
Limit range for
storage -25°C to +70°C
Limit range for
transportation -25°C to +70°C
Temperature
coefficient ± 0.1% / 10°C
Reference conditions
Usage group (IEC
60688) Group I
Reference
temperature range +10°C to + 35°C
Pre-conditioning 30 minutes
Environment
Indoor only
Humidity
95% non-condensing
Altitude level
Up to 2000 m
Over voltage / Installation category
CAT III for ≤ 300 VAC and CAT II for ≤ 600 VAC
Measurement category
CAT III for ≤ 300 VAC and CAT II for ≤ 600 VAC
Insulation AC voltage test (IEC 61010:2010)
3.7kV
Impulse voltage test (IEC 61010:2010)
6.4kV
Electrical specifications
Transducer variant
Parameter Specification
AC voltage Input voltage (Un) 100 V to 500 V (L-L)
500 V is maximum limit.
Measuring range 0 to 130% Un
Scale factor 0.8 to 1.5 of Un(up to 500 V)
Frequency 50/60 Hz (±5%)
Maximum overload voltage 1.3 x Uncontinuously
2 x Unfor 1 second, with up to 10 repetitions at 10 second
intervals
Output curve mA
type 0-20 mA, 4-20 mA and 0-10 mA
(Applicable for accuracy class 1.0, 0.5 and 0.2)
0-5 mA

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(Applicable for accuracy class 1.0 and 0.5)
0-1 mA and 0-2 mA
(Applicable for accuracy class 1.0)
V
type -5 to +5 V and -10 to +10 V
(Applicable for accuracy class 1.0, 0.5 and 0.2)
AC current Input (In) current 1 to 5 A
Measuring current range 0 to 150% In
Scale factor 0.6 to 1.5 of In
Frequency 50/60 Hz (±5%)
Output curve mA type 20 mA, 4-20 mA and 10 mA
(Applicable for accuracy class 1.0,
0.5 and 0.2)
0-5 mA
(Applicable for accuracy class 1.0
and 0.5)
0-1 mA and 0-2 mA
(Applicable for accuracy class 1.0)
V type -5 to +5 V and -10 to +10 V
(Applicable for accuracy class 1.0,
0.5 and 0.2)
Maximum overload current 2 x Incontinuously
20 x In for 1 second, with up to 5 repetitions at 5 minute
intervals
Active
power/reactive
power
Input voltage (Un) 100 V to 500 V (L-L)
500 V is maximum limit.
Input voltage range 0 to 130 % Un
Input current (In) 1 to 5 A
Input current range 0 to 150% In
Frequency 50/60 Hz (±5%)
Output curve mA type -20 to +20 mA, 4-20mA and -10 to
+10 mA
(Applicable for accuracy class 1.0,
0.5 and 0.2)
-5 to +5 mA
(Applicable for accuracy class 1.0
and 0.5)

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-1 to +1 mA and -2 to +2 mA,
(Applicable for accuracy class 1.0)
V type -5 to +5 V and -10 to +10 V
(Applicable for accuracy class 1.0,
0.5 and 0.2)
Scale factor 0.5 to 1.5 (active power at unity power factor)
0.3 to 1 (reactive power at reactive power factor >0.8 or
unity)
Active power factor
Input voltage (Un) 100 V to 500 V (L-L)
500 V is maximum limit.
Input voltage range 0 to 130 % Un
Input current (In) 1 to 5 A
Input current range 0 to 150% In
Frequency 50/60 Hz (± 5 %)
Measurement range -1 lead-0-1 lag
Output curve mA type -20 to +20 mA, 4-20mA and -10 to
+10 mA
(Applicable for accuracy class 1.0,
0.5 and 0.2)
-5 to +5 mA
(Applicable for accuracy class 1.0
and 0.5)
-1 to +1 mA and -2 to +2 mA,
(Applicable for accuracy class 1.0)
V type -5 to +5 V and -10 to +10 V
(Applicable for accuracy class 1.0,
0.5 and 0.2)
Load power factor Input voltage (Un) 100 V to 500 V (L-L) for 3P3W
57.5 to 400 V (L-N) for 3P4W
500 V is maximum limit.
Input voltage range 0 to 130 % Un
Input current (In) 1 to 5 A
Input current range 0 to 150% In
Frequency 50/60 Hz (± 5 %)
Measurement range -1 lead-0-1 lag
Output curve mA type -20 to +20 mA, 4-20mA and
-10 to +10 mA

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(Applicable for accuracy
class 1.0, 0.5 and 0.2)
-5 to +5 mA
(Applicable for accuracy
class 1.0 and 0.5)
-1 to +1 mA and -2 to +2
mA,
(Applicable for accuracy
class 1.0)
V type -5 to +5 V and -10 to +10 V
(Applicable for accuracy
class 1.0, 0.5 and 0.2)
Apparent Power Input voltage (Un) 100 V to 500 V (L-L)
500 V is maximum limit.
Input voltage range 0 to 130 % Un
Input current (In) 1 to 5 A
Input current range 0 to 150% In
Frequency 50/60 Hz (±5%)
Output curve mA type -20 to +20 mA, 4-20mA and
-10 to +10 mA
(Applicable for accuracy
class 1.0, 0.5 and 0.2)
-5 to +5 mA
(Applicable for accuracy
class 1.0 and 0.5)
-1 to +1 mA and -2 to +2
mA,
(Applicable for accuracy
class 1.0)
V type -5 to +5 V and -10 to +10 V
(Applicable for accuracy
class 1.0, 0.5 and 0.2)
Frequency Input voltage (Un) 100 V to 500 V (L-L)
500 V is maximum limit.
Input voltage range 0 to 130 % Un
Input current (In) 1 to 5 A
Input current range 0 to 150% In

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Measurement range 45 Hz to 55 Hz (on 50 Hz), or 55 Hz to 65 Hz (on 60 Hz)
Output curve mA type -20 to +20 mA, 4-20mA and
-10 to +10 mA
(Applicable for accuracy
class 1.0, 0.5 and 0.2)
-5 to +5 mA
(Applicable for accuracy
class 1.0 and 0.5)
-1 to +1 mA and -2 to +2
mA,
(Applicable for accuracy
class 1.0)
V type -5 to +5 V and -10 to +10 V
(Applicable for accuracy
class 1.0, 0.5 and 0.2)
MFT Ranges applicable for configured input function (AC voltage, AC current, reactive
power, active power, active power factor, apparent power, load power factor, and
frequency ) as per measurement inputs shown above.
Auxiliary supply
High-auxiliary Voltage range 80 V to 276 V AC/DC
Frequency 50/60 Hz
Maximum burden
≤11 VA, 6 W with two outputs at 750
Ω each at 20 mA
≤12 VA, 7 W with four outputs at 750
Ω each at 20 mA
Low-auxiliary Voltage range 24 V to 80 V DC
Maximum burden
≤6 W with two outputs at 750 Ω each
at 20 mA
≤8 W with four outputs at 750 Ω
each at 20 mA
Standards compliance
Standards complied IEC 60688 (Edition 3.0) : 2012, IEC 61010-1 (Edition 3.0) : 2010, IEC
61010-2-030 (Edition 1.0) : 2010, IEC61326-1(Edition-2) : 2012, IEC or
EN60068-2-1/-2/-3/-6/-27
Analogue outputs
Type Current or Voltage (configurable)
Maximum load impedance ≤750 Ω for 20 mA, ≥2 kΩ for 10 V (for each output)

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Response time At 5 cycles measurement
≥100 ms to ≤ 220 ms
Ripple < 0.4% peak to peak, at 20 mA
Mechanical specifications
Product dimensions (W x H x D) 100 mm x 75 mm x 105 mm
Weight 0.7 kg (approx.)
Material Flame-retardant polycarbonate (PC-FR), UL94 V-0
Mounting Top hat DIN Rail mountable as per EN 50022
Connector type Screw terminals
Conductor size for terminals ≤4 mm2 (solid max.)
Connection cables
(recommended size) 2.5 mm2
Recommended torque 0.5 N m
Impact rating (IK code) IK06
Impact energy level 1 joule
5.1 PT3 output signals
1. Curve A (linear)
2. Curve B (linear with live
zero)
3. Curve F (compressed upper
region)
Example 0-10 mA
corresponding to 0-100 A
Example 4-20 mA corresponding
to 0-100 A
Example 0-16-20 mA corresponding
to 0-200-800 A
4. Curve F (compressed
lower region with live
5. Curve C (Bipolar)
6. Curve D (Bipolar with live zero)

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zero)
Example 4-6-20 mA
corresponding to 0-8-12 kV
Example (-10)-0-10 mA
corresponding to (-100) -0-100
kW
Example 0-5-10 mA
corresponding to (-100) -0-100 kW
Figure 2: PT3 transducer output curves

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6 Configuring PT3 transducers
Configuration means setting up the programmable features in a device, in order to make it suitable for a
particular application. To configure PT3 transducers, you must have the latest version of ConfigView software
installed on your PC or laptop device. This software may be downloaded free of charge from our website:
www.securemeters.com.
PT3 transducers can be configured either in online or offline mode.
6.1 Procedure to configure PT3 in Online mode
To configure the transducer device in online mode, a physical connection must be established between the
transducer and the PC /laptop with ConfigView. The process for configuration is described below:
1. Connect the PC /laptop to the micro USB port on the PT3 transducer using a suitable cable.
Figure 3: Establishing connection between PT3 and ConfigView
2. Launch the ConfigView software.
3. Establish the connection between ConfigView and the transducer. For details on how to make the
connections, refer the ConfigView help file.
4. Once connected, the existing configuration of the connected transducer device is displayed in ConfigView.
5. Make the required changes and click the Apply button.
6. If required, the customer serial number of the transducer can be changed from ConfigView. A label can also
be printed for the new configuration applied. For both the procedures, refer the sections 6.3 and 6.4
respectively.
7. Perform a power cycle reset (Power OFF-ON) of the transducer device for the new configuration to take
effect.
Figure 4: Configuring PT3 in online mode

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Note: Please refer the ConfigView user manual for detailed settings that can be configured in the PT3
transducers.
6.2 Procedure to configure PT3 in Offline mode
In this mode, a configuration file is generated in ConfigView and saved in the computer or laptop. This
configuration can be transferred to the transducer device by establishing a physical connection at any later time.
Please ensure that the configuration file includes the correct product code details of the transducer to be
configured. In case of incorrect product code, the device will reject the configuration file.
To perform the configuration in offline mode, do the following:
1. Launch the ConfigView software.
2. Create a new configuration file or open an existing configuration file.
3. Make the required modifications.
4. Save the file.
Figure 5: Configuring PT3 in offline mode
5. The rest of the procedure is the same as that described for online mode under section 6.1. The only
difference is that you need to select the saved configuration file and apply it to the transducer device.
Note:
Multiple transducers can be configured using a single configuration file generated in offline mode.
6.3 Changing the customer serial number in the transducer
If required, the serial number of the transducer device can be changed when the transducer is connected to
ConfigView via a USB cable.
To change the customer serial number on the transducer using ConfigView, do the following:
•In the Settings menu, click Change Customer Serial No.
•Set the customer serial number to any combination of eight alphanumeric characters.
•Type the required customer serial number in the Change Customer Sr. No. box, and then click Save.
6.4 Printing/exporting label for PT3 transducer
A label stating the configuration details can be printed out and pasted on the PT3 transducers. This can be done
directly from ConfigView, if a transducer is connected via USB cable.

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To print/export the label from ConfigView, do the following:
•Click the icon in the toolbar.
•The printer settings can be adjusted, or the file can be exported in Word, Excel or PDF formats.
•To export the file, click the icon in the Print screen toolbar.
•A previously exported label can be printed using Word, Excel or Acrobat Reader.
•Cut the printed label around the dotted line and then stick it on the PT3 transducer.

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7 Installing PT3 transducers
7.1 PT3 transducer dimensional details
The overall dimensions of PT3 transducers are shown below.
Figure 6: PT3 transducer dimensions
7.2 Mounting the PT3 transducer on a DIN rail
To mount the PT3 transducer on a DIN rail, hook one edge of the rail with the top edge of the cut out located at
the rear of the device.
Figure 7: Aligning PT3 transducer on DIN rail
Press the device against the bottom edge of the DIN rail until the locking mechanism engages firmly in place
with the release clip at the rear.