99 Washington Street
Melrose, MA 02176
®
Fax 781-665-0780
TestEquipmentDepot.com
1744/1743
Power Quality Logger
Users Manual
PN 2560353
April 2006 Rev.1, 6/06
© 2006 Fluke Corporation, All rights reserved. Printed in USA
All product names are trademarks of their respective companies.
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1744/1743
Users Manual
Min/Max Values........................................................................... 30
Voltage Interruptions.................................................................... 31
Voltage Dips and Swells .............................................................. 32
Voltage Harmonics........................................................................... 32
Current Harmonics ........................................................................... 33
Mains Signaling............................................................................ 33
THDV – In Function A................................................................. 34
Calculation of THD in Measuring Function P.............................. 35
Flicker .......................................................................................... 35
Unbalance..................................................................................... 36
Frequency..................................................................................... 36
Current Logging ........................................................................... 37
Logging Function A ..................................................................... 37
Crest Factor (CF).......................................................................... 37
Power ............................................................................................... 37
Logger Parameters with Function P ..................................................... 38
Logger Parameters with Function A..................................................... 41
Maintenance......................................................................................... 45
Lithium Battery ................................................................................ 45
Disposal............................................................................................ 45
Technical Specifications....................................................................... 46
Logging Parameters – Overview ...................................................... 46
Maximum Number of Intervals for Logging Function P.............. 47
General Information ..................................................................... 47
Environmental Specifications....................................................... 48
EMC............................................................................................. 48
Power Supply ............................................................................... 49
Measurement ................................................................................ 49
Input Voltage................................................................................ 50
Current Input with Flexi Set......................................................... 50
Current Input for Clamp ............................................................... 51
General Specifications...................................................................... 52
RMS Logging Slow Voltage Variations....................................... 52
Current Logging Values ............................................................... 52
Events Dips, Swells, Interruptions................................................ 52
Flicker .......................................................................................... 52
Power (Logging Functions A, P only) P, S, |P|............................. 53
Harmonics .................................................................................... 53
Statistics ....................................................................................... 53
Logging Function P.......................................................................... 54
Logging Values ............................................................................ 54
Application................................................................................... 54
Logging Function A – “All” parameters........................................... 55
Logging Values ............................................................................ 55
Applications ................................................................................. 56
PQ Log PC Application Software ........................................................ 57
Online Test................................................................................... 58
ASCII Export................................................................................ 59
ii
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Contents (continued)
Timeplot diagram.......................................................................... 60
UNIPEDE DISDIP Table.............................................................. 61
Cumulative Frequency – Harmonics............................................. 62
Index
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Users Manual
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List of Tables
Table
Title
Page
1.
2.
3.
4.
Symbols.............................................................................................. 4
Standard Equipment........................................................................... 7
Optional Accessories.......................................................................... 7
1744/1743 Power Quality Logger -
Controls and Indicators ...................................................................... 9
Test Lead Markings............................................................................ 14
Measuring Ranges.............................................................................. 27
Logging Parameters - Overview......................................................... 46
5
6.
7.
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Users Manual
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List of Figures
Figure
Title
Page
1.
2.
3.
4.
5.
6.
7.
1743 and 1744 Power Quality Loggers.............................................. 3
1744/1743 Power Quality Logger - Front View................................. 8
Supplying Operating Power to the Logger......................................... 13
Logging in a 3-Phase 4-Wire (Wye) System...................................... 18
Logging in a 3-Phase 3-Wire (Delta) System..................................... 19
Single Phase Logging......................................................................... 20
Measuring 3-Phase Voltages in a 3-Wire (Delta)
System with Three Voltage Converters.............................................. 21
PQ Log Settings for a 16 kV Network ............................................... 22
PQ Log Settings for a 16 kV Network ............................................... 23
Measuring 3-Phase Voltages in a 3-Wire System
8.
9.
10.
with Potential Transformers (Aron Measuring Circuit)...................... 24
PQ Log Settings for a 16 kV Network ............................................... 25
Selecting Voltage Input Ranges During Job Processing..................... 28
Measuring Voltage Variations............................................................ 29
Logging Min and Max Values............................................................ 30
Voltage Interruption........................................................................... 31
Voltage Dips and Swells .................................................................... 32
Measuring Flicker Values .................................................................. 36
Online Test......................................................................................... 58
ASCII Export ..................................................................................... 59
Timeplot Diagram.............................................................................. 60
UNIPEDE DISDIP Table................................................................... 61
Cumulative Frequency – For Voltage and
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
Current Harmonics............................................................................. 62
vii
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Users Manual
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1744/1743
Power Quality Logger
Introduction
The Fluke 1744 and 1743 Power Quality Loggers are sophisticated, robust,
easy-to-use electrical power-recording devices for the electrician or power-
quality specialist.
Note
This manual also refers to the 1744 or 1743 Power Quality Logger
simply as “the Logger.”
You’ll prepare the Logger for use with the included PQ Log software CD. You
can then connect the Logger to an electrical power-distribution network to log
a variety of power parameters, recorded as sequential averaged values over an
averaging period you can define. The Logger can measure up to three voltages
and four currents simultaneously.
The Logger enables you to conduct a load study over a specified period, or
monitor power quality to discover and report disturbances in low- and
medium-voltage networks.
The Logger has a light, compact design. Its case is sealed to IP 65
specifications, so it can be used outdoors in any weather.
Information and PC Software CD
The CD included with the Logger contains the PQ Log application software for
Windows®, along with users manuals in multiple languages, and the 1735
Upgrade Utility for installing firmware upgrades.
The PQ Log software prepares the Logger for use, and downloads data from
the Logger to a connected PC. You can then view the logged data in graphical
and tabular form, export it to a spreadsheet, or create reports for printing. For
details and instructions, see the PQ Log Users Manual on the CD.
1
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1744/1743
Users Manual
Logger Power Supply
The Logger does not include a power switch, but turns on automatically
whenever its power supply leads are connected to a voltage in its allowed
range. You can plug the Logger’s power supply leads into a standard wall
outlet (using the included adapter cord), or you can connect them directly to
the power network under test (in parallel with the test leads) if there is no
convenient wall outlet.
Power Interruptions
The Logger can sustain operation through power interruptions of up to
three seconds, long enough for most common interruptions. In longer
interruptions, the Logger shuts down, then resumes logging when power
returns.
Introduction to the Logging Functions
The Logger monitors power quality and locates disturbances in low and
medium voltage distribution networks. It measures up to three voltages and
four currents. Logged values are saved in your choice of sequential averaging
periods. You graphically or numerically evaluated measured values with PQ
Log.
The Model 1744 has two types of logging functions: logging function A
(Advanced) and logging function P (Power). Function A is the full set of
parameters, and function P provides logging capability optimized for load
studies and basic power logging. Function P contains every parameter in
Function A except voltage and current harmonics and interharmonics. Model
1743 provides only logging function P.
Measured values are saved as averaged values over user-selected averaging
periods. You can evaluate measured values graphically or in tabular form with
PQ Log software.
Logging function parameters:
•
•
•
•
RMS Voltage of each phase (average, min, max)
RMS Current of each phase and neutral (average, min, max)
Voltage events (dips, swells, interruptions)
Power (kW, kVA, kVAR, Power PF, Power tangent)
2
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Power Quality Logger
Introduction to the Logging Functions
•
•
•
•
•
•
•
•
•
•
Energy, total energy
Flicker (Pst, Plt)
Voltage THD
Current THD
Current CF
Voltage harmonics to the 50th (not in P function)
Voltage interharmonics (not in P function)
Mains signaling voltage
Unbalance
Frequency
CURRENT INPUT
MEASUREMENT INPUT SUPPLY INPUT
10VRMS MAX
L
L
L
/A
/B
/C
660V MAX
88-660V
45-65Hz
100-350V
5VA
1
2
3
N
830VRMS MAX CAT
600V CAT
300V CAT
1743 POWER LOGGER
START
STOP
IN I3 I2 I1 V3 V2 V1
POWER
egb002.eps
Figure 1. Model 1744/1743 Power Quality Loggers
3
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1744/1743
Users Manual
Symbols
Table 1 lists the symbols used on the instrument and in this manual.
Table 1. Symbols
Symbol
Description
Important information. See the manual.
W
Hazardous voltage.
Earth ground.
X
J
Double insulation.
T
F
Direct current (DC).
Conforms to European Union requirements.
P
)
~
Canadian Standards Association is the certified body used
for testing compliance to safety standards.
Do not dispose of this product as unsorted municipal waste.
Contact Fluke or a qualified recycler for disposal.
Conforms to relevant Australian Standards.
;
Safety Instructions
Please read this section carefully. It will make you familiar with the most
important safety instructions for using the Logger.
Warnings identify conditions and actions that pose safety hazards to the
user, and Cautions identify conditions and actions that can damage the
Logger.
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Power Quality Logger
Safety Instructions
WXWarnings
•
•
To avoid electrical shock, do not connect any part of
the Logger to systems that have higher voltages to
ground (earth) than are marked on the Logger.
Areas between the power company meter and the
source of the distribution system are characterized as
CAT IV areas. To avoid electrical shock or equipment
damage, never connect the Logger to power in CAT IV
areas if the voltage-to-earth ground is greater than
300 V.
•
•
To avoid damaging the Logger, never connect its
voltage measuring inputs to phase-to-phase voltages
higher than 830 V.
To avoid damaging the Logger, never connect the
power supply leads to voltages higher than 660 V RMS
ac.
•
•
•
The Logger is to be used and handled only by qualified
personnel (see page 6).
Maintenance work on the Logger must be done only by
qualified service personnel.
Use only the current probes specified in this manual. If
you use flexible current probes, wear suitable
protective gloves or work on de-energized conductors.
•
•
Do not expose the Logger to moisture or humidity.
To prevent electrical shock, always connect power
supply and voltage test leads to the Logger before
connecting to the load.
•
•
All accessories must be approved for 600 V CAT III or
higher.
Use the Logger only with its original standard
equipment or with approved optional accessories, as
listed in Table 2 and Table 3 in this manual.
5
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1744/1743
Users Manual
•
•
Connect clip-on current transformers and/or Flexi Set
to insulated live conductors only.
If measuring sensors are to be connected to non-
insulated live conductors, additional personal
protective measures must be taken as required by local
government agencies.
WCaution
To avoid damage, use the 1744/1743 Power Quality Logger,
only with the following nominal voltages:
•
Single-/3-phase, 4-wire (Wye) systems (P-N): 69 V
to 480 V
•
3-phase 3-wire(Delta) systems (P-P): 120 V to 830 V
WXWarning
To avoid electrical shock, or damaging the Logger’s
internal protective circuitry or weatherproof seal, do not
open the Logger.
Qualified Personnel
The following qualifications are required for using the Logger safely:
•
Trained and authorized to switch on/off, ground (earth), and mark
power distribution circuits and devices in accordance with electrical
engineering safety standards.
•
•
Trained or instructed in safety engineering standards for maintaining
and using appropriate safety equipment.
Trained in first aid.
Standard Equipment and Optional Accessories
Table 2 lists the standard equipment for the 1744/1743 Power Quality Logger,
and Table 3 lists optional accessories.
6
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Power Quality Logger
Safety Instructions
Table 2. Standard Equipment
Equipment
Model/Part
Number
Power Quality Logger
1744/1743
2441372
2625531
FS17XX
2540726
WC17XX
1642656
2560353
2583487
International IEC Power Plug Adapter Set
RS232 Cable, Red, Null-Modem
Shielded 4-Phase Flexi Set (15 A/150 A/1500 A/3000 A)
Dolphin Clip, Black (4x)
Color Coding Wire Clips
Soft Case
English Users Manual
CD with Users Manual (English, German, French, Spanish,
Portuguese, Simplified Chinese, Italian), and PQ Log
software (same languages as the manual)
Power Cord
2561702
USB Adapter
Note
Power supply and voltage measuring leads are built into the
1744/1743 Power Quality Logger.
Table 3. Optional Accessories
Description
Accessory
MBX 3FLEX
EPO405A
3-Phase Flexi Set
3-Phase 1 A/10 A micro CT
Pole Mounting Kit
1743/4 Pole Kit
Permlink
Permlink Software for Modem
Magnetic Hanging Kit
1281997
7
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1744/1743
Users Manual
Inspect the contents of the shipping box for completeness and damage. Report
any damage to the shipper.
Features
This section introduces the Logger’s controls, indicators, and other features.
Refer to Figure 2 and Table 4.
1
6
CURRENT INPUT
MEASUREMENT INPUT SUPPLY INPUT
10VRMS MAX
L
L
L
/A
/B
/C
660V MAX
88-660V
45-65Hz
100-350V
5VA
1
2
3
N
830VRMS MAX CAT
7
600V CAT
300V CAT
5
3
1743 POWER LOGGER
START
STOP
IN I3 I2 I1 V3 V2 V1
POWER
2
4
egb021.eps
Figure 2. 1744/1743 Power Quality Logger - Front View
8
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Power Quality Logger
Safety Instructions
Table 4. 1744/1743 Power Quality Logger - Controls and Indicators
Item
Name
Description
Power supply voltage range: 88-660 V ac or
100-350 VDC, 50 Hz / 60 Hz, 600 V CAT III.
Power supply
leads and
A
Fixed installed voltage input cables for L1 or A,
L2 or B, L3 or C, N.
The highest permissible nominal voltage for power
supply input is 660 V.
3-phase plus
neutral voltage
test leads
The highest permissible nominal voltage for signal
input is 830 V in a 3-wire network with Delta
connection.
In a 4-wire network with Wye connection, the
highest permissible nominal voltage is 480 V.
When using PTs and CTs for measuring voltage
and current in a medium-voltage network, refer to
the IEC 60044 international standard for
guidelines.
The serial RS232 interface is used to communicate
with a PC. The Logger is connected to the PC’s
serial port (or a modem for remote communication)
using the interface cable. Use a USB adapter if
necessary.
RS232
interface port
B
The START/STOP button is used to start or end
switch-operated logging sessions.
START/STOP
Channel LEDs
C
D
The logging channel LEDs indicate whether the
applied voltages and currents are within the
nominal range set using the PQ Log software.
Continuously on = Logging signal in nominal range
Short blinks = No or low-level signal
Long blinks = Overload
Continuously on = Power supply voltage in
permissible range
Off = No power
Power status
LED
E
F
Flexi sets or current clamps are detected
Connector for
Flexi Set or
current clamps
automatically at power-up. If you change the current
probe type, be sure to remove and restore power so
the Logger will detect the new current probe.
Nominal ranges for the Flexi Set are 15 A, 150 A,
1500 A, and 3000 A ac. Nominal input for current
clamps is 0.5 V.
Continuously on = Logging in progress
Blinking = Logging stopped or not started
Logging status
LED
G
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1744/1743
Users Manual
Power Network Configurations
You can set up the Logger to work with several power network configurations:
•
•
•
•
•
Single-phase voltage
Single-phase voltage, current, power
3-phase voltage
3-phase voltage, 3-phase current, power
3-phase voltage, 3-phase current, neutral current, power
Note
3-phase logging with no neutral current can be done with appropriate
optional accessories (available separately).
Working with Logged Data
Logged data can be evaluated using the PQ Log software to provide the
following:
•
•
Amount, date/time, and duration of quick and slow voltage variations
Half-cycle 10 ms-extreme values for 50 Hz (8.3 ms at 60 Hz) MIN
and MAX for each measuring interval
•
•
•
•
•
•
•
•
Depth and duration of voltage dips
Correlation between peak current and voltage dips
95%-flicker values according to EN 50160
Number and duration of interruptions
Compliance of harmonic levels with defined limits
Mean and peak values of phase currents
Value of neutral conductor current
Current total harmonic distortion (THD) of phase and neutral
conductor currents
•
•
Profile of active, reactive, and apparent power versus time
Monitoring of power factor (PF), and information about effectiveness
of compensation systems
•
Graphical representations of logging data and statistics
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Power Quality Logger
Using the Logger
Using the Logger
This section explains how to operate the 1744/1743 Power Quality Logger.
A typical logging session includes four steps:
1. Preparing the Logger for use with the PQ Log software.
2. Installing the Logger at the logging site.
3. Leaving the Logger to collect data for a period.
4. Downloading and evaluating the logged data.
These steps are described in the following pages.
Logging Jobs
Logging jobs are defined using the PQ Log software, and transferred to the
Logger over the RS232 cable. Each job contains the following information:
•
•
•
•
•
Logging function (P for Model 1743, and P or A for Model 1744)
Measuring period, defined by start and end times
Time activated, switch or immediate job
Input range
Nominal voltage, primary and secondary voltage for logging with
voltage converters
•
•
•
•
•
•
•
Logging of phase-neutral wire or phase-phase
Memory model
Averaging period length
Logging time periods
Interharmonics and signaling voltages
Limit values for events
Memory model for events: circular (first-in/first-out, continuous), or
linear (quit logging when logging period is finished)
•
•
Logging of current-neutral wire
Converter ratios for current and voltage if using potential transformers
(PTs) and current transformers (CTs) at a medium-voltage network
site
11
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1744/1743
Users Manual
Preparing the Logger for Use
Prepare the 1744/1743 Logger for use with the PQ Log software as follows
(see Figure 3):
1. Connect the Logger to line power. Use the power supply cables to
connect to an outlet, or to the test leads phase and neutral for Wye
configurations, or any two-phase leads for delta.
WCaution
If you are powering the Logger in parallel with the test
leads, and the voltage under test at the Logger power
supply connections could be greater than 660 V RMS ac,
plug the power supply leads into an outlet instead.
Otherwise, you could damage the Logger.
12
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Power Quality Logger
Using the Logger
Power in Parallel
with Test Leads
Power from Wall Outlet
Max 660 V
Voltage
Test Leads
Voltage
Test Leads
Power Supply
Leads
Power Supply
Leads
CURRENT INPUT
MEASUREMENT INPUT SUPPLY INPUT
CURRENT INPUT
MEASUREMENT INPUT SUPPLY INPUT
10VRMS MAX
L
L
L
/A
/B
/C
660V MAX
10VRMS MAX
L
L
L
/A
/B
/C
660V MAX
88-660V
45-65Hz
100-350V
5VA
1
2
3
1
2
3
88-660V
45-65Hz
100-350V
5VA
N
N
830VRMS MAX CAT
830VRMS MAX CAT
600V CAT
300V CAT
600V CAT
300V CAT
1743 POWER LOGGER
1743 POWER LOGGER
START
STOP
START
STOP
IN I3 I2 I1 V3 V2 V1
IN I3 I2 I1 V3 V2 V1
POWER
POWER
egb031.eps
Figure 3. Supplying Operating Power to the Logger
2. Connect the RS232 interface cable to the serial port of your PC.
13
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1744/1743
Users Manual
3. Run the PQ Log software as described in the PQ Log Users Manual.
4. Set up the Logging job and transfer the settings to the Logger.
Test Leads – Markings
The 1744/1743 Logger includes built-in, labeled test leads for voltage
terminals L1 or A, L2 or B, L3 or C, and N, as well as two for the internal
power supply. The Flexi Set or current clamp sets are connected by a seven-pin
plug to the Logger. Color coding clips are provided for your convenience.
Table 5. Test Lead Markings
Test Leads
Phase L1 or A
Phase L2 or B
Phase L3 or C
Neutral wire N
Supply
Markings
L1 / A
L2 / B
L3 / C
N
“Supply”
“Supply”
Supply
Connecting Current Probes
Connect current clamps and Flexi Set probes so that current will flow in the
direction marked by arrows on the probes. Current must flow from the energy
generator to the energy consumer (the load) in order to maintain a positive
active power. (The polarization of the test lead for neutral conductor current is
not significant, because the phase angle of the neutral conductor current is not
evaluated.)
Note
Make sure the clip-on probes are connected to the appropriate phase:
VL1 with IL1 for a P-N measurement or VL12 with IL1 for a P-P
measurement.
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Power Quality Logger
Using the Logger
Logging with Voltage Converters
The 1744/1743 Logger includes an adjustable converter ratio that enables it to
be used with voltage converters (potential transformers, or PTs).
Note
When logging with voltage converters, make sure the power supply
cables are not connected in parallel to the voltage test leads, or the
Logger’s power consumption can reduce accuracy.
The converter ratio is defined using the PQ Log software.
Connecting the Logger
WXWarnings
•
•
To avoid electrical shock, do not connect any part of
the Logger to systems that have higher voltages to
ground (earth) than are marked on the Logger.
Areas between the power company meter and the
source of the distribution system are characterized as
CAT IV areas. To avoid electrical shock or equipment
damage, never connect the Logger to power in CAT IV
areas if the voltage-to-earth ground is greater than
300 V.
•
•
To avoid damaging the Logger, never connect its
voltage measuring inputs to phase-to-phase voltages
higher than 830 V.
To avoid damaging the Logger, never connect the
power supply leads to voltages higher than 660 V RMS
ac.
•
•
The Logger is to be used and handled only by qualified
personnel (see page 6).
Maintenance work on the Logger must be done only by
qualified service personnel.
15
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1744/1743
Users Manual
•
Use only the current probes specified in this manual. If
you use flexible current probes, wear suitable
protective gloves or work on de-energized conductors.
•
•
Do not expose the Logger to moisture or humidity.
To prevent electrical shock, always connect power
supply and voltage test leads to the Logger before
connecting to the load.
•
•
All accessories must be approved for 600 V CAT III or
higher.
Use the Logger only with its original standard
equipment or with approved optional accessories, as
listed in Table 2 and Table 3 in this manual.
•
•
Connect clip-on current transformers and/or Flexi Set
to insulated live conductors only.
If measuring sensors are to be connected to non-
insulated live conductors, additional personal
protective measures must be taken as required by local
government agencies.
WCaution
To avoid damage, use the 1744/1743 Power Quality Logger,
only with the following nominal voltages:
•
Single-/3-phase, 4-wire (Wye) systems (P-N): 69 V
to 480 V
•
3-phase 3-wire (Delta) systems (P-P): 120 V to 830 V
WXWarning
To avoid electrical shock, or damaging the Logger’s
internal protective circuitry or weatherproof seal, do not
open the Logger.
16
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Power Quality Logger
Using the Logger
Connect the Logger as follows:
Note
∆ (Delta) or Υ (Wye) measurements
The 1744/1743 Logger is prepared for logging in 3-phase 4-wire
(Wye) systems (P-N), or 3-phase 3-wire (Delta) systems (P-P). Please
note the different types of connection and configuration in the PQ Log
software.
1. Connect all required measuring leads.
2. If you want to supply the Logger from an extra outlet, use the
supplied line power adapter. The power supply leads can also be
connected in parallel to the voltage test leads, but the voltage is
limited to 660 V RMS ac.
3. Connect the current clamp set or Flexi Set to the Logger.
4. Connect the current sensor to the conductor under test.
5. Connect the dolphin clips to the test leads. For 3-phase, 4-wire
systems, connect the N-test lead first, and then the other phases.
17
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1744/1743
Users Manual
Connections in 3-Phase 4-Wire (Wye) Systems
The following figure shows the connections for logging 3-phase 4-wire (Wye)
systems:
L1
L2
L3
N
CURRENT INPUT
MEASUREMENT INPUT SUPPLY INPUT
10VRMS MAX
L
L
L
/A
/B
/C
660V MAX
88-660V
45-65Hz
100-350V
5VA
1
2
3
N
830VRMS MAX CAT
600V CAT
300V CAT
1743 POWER LOGGER
START
STOP
IN I3 I2 I1 V3 V2 V1
POWER
egb003.eps
Figure 4. Logging in a 3-Phase 4-Wire (Wye) System
18
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Power Quality Logger
Using the Logger
Connections in 3-Phase 3-Wire (Delta) Systems
Figure 5 shows the connections for logging 3-phase 3-wire (Delta) systems.
L1
L2
L3
L4
CURRENT INPUT
MEASUREMENT INPUT SUPPLY INPUT
10VRMS MAX
L
L
L
/A
/B
/C
660V MAX
88-660V
45-65Hz
100-350V
5VA
1
2
3
N
830VRMS MAX CAT
600V CAT
300V CAT
1743 POWER LOGGER
START
STOP
IN I3 I2 I1 V3 V2 V1
POWER
IP65
egb004.eps
Figure 5. Logging in a 3-Phase 3-Wire (Delta) System
The test lead N can be left open, or connected to ground potential.
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Users Manual
Connections for Single-Phase Logging
Figure 6 shows the connections for logging single-phase systems.
L1
N
L3
L2
CURRENT INPUT
MEASUREMENT INPUT SUPPLY INPUT
10VRMS MAX
L
L
L
/A
/B
/C
660V MAX
88-660V
45-65Hz
100-350V
5VA
1
2
3
N
830VRMS MAX CAT
600V CAT
300V CAT
1743 POWER LOGGER
START
STOP
IN I3 I2 I1 V3 V2 V1
POWER
egb005.eps
Figure 6. Single-Phase Logging
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Power Quality Logger
Using the Logger
Connections for Medium-Voltage Networks
In a 3-phase 3-wire (Delta) system with three separate voltage converters and
three current transformers, the Logger can measure phase-phase (P-P, Delta) or
phase-N (P-N, Wye). See Figure 7.
L1
L1
L2
L2
L3
L1
L2
L3
Supply
L3
N
CURRENT INPUT
MEASUREMENT INPUT SUPPL
/A
660
88-660
45-65Hz
100-350
VA
Y
INPUT
10VRMS MAX
L
V
MAX
V
1
L2
L3
N
/
/
B
C
V
830VRMS MAX CA
T
5
600
300
V
V
CA
T
CA
T
1743 POWER LOGGER
START
STOP
I
N
I
3
I
2
I
1
V
3
V
2
V
1
POWER
egb006.eps
Figure 7. Measuring 3-Phase Voltages in a 3-Wire (Delta) System with
Three Voltage Converters
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Phase-Phase Delta Logging
Figure 7 shows the connections for phase-phase Delta logging.
1. Connect the voltage test leads to the outputs of the voltage
transformers (VTs).
2. In PQ Log, select the measuring range with the matching nominal
voltage and P-P logging.
3. Enter the correct converter/transformer ratio for current and voltage.
egb007.bmp
Figure 8. PQ Log Settings for a 16 kV Network
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Power Quality Logger
Using the Logger
Phase-Ground, Wye-Logging
Figure 7 shows the Phase-Ground, Wye-Logging. Figure 9 shows typical PQ
Log settings for using potential transformers (PTs) and current transformers
(CTs) with a 16 kV network.
egb010.bmp
Figure 9. PQ Log Settings for a 16 kV Network
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1. Connect the voltage test leads to the outputs of the voltage
transformers (VTs).
2. In PQ Log, select the measuring range with P-N logging and
matching nominal voltage.
3. Enter the correct converter/transformer ratio for current and voltage.
Note
Current clamp sets are available for 1 A current transformers.
Logging with Two Voltage Converters and Two Current
Transformers
In 3-phase 3-wire systems with two voltage converters (VTs) and two current
transformers (CTs) in an Aron or Blondel measuring circuit, the Logger can
measure only phase-phase (P-P, Delta).
L1
L2
L3
L3
L2, N
CURRENT INPUT
MEASUREMENT INPUT SUPPL
/A 660
88-660
45-65Hz
100-350
VA
Y
INPUT
10VRMS MAX
L
V
MAX
V
1
L2
L3
N
/
/
B
C
V
830VRMS MAX CA
T
5
600
300
V
V
CA
T
CA
T
1743 POWER LOGGER
L1
START
STOP
I
N
I
I
I
V
V
V
3
2
1
3
2
1
POWER
egb009.eps
Figure 10. Measuring 3-Phase Voltages in a 3-Wire System with Potential
Transformers (Aron Measuring Circuit)
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Using the Logger
1. Connect the voltage test leads L2 or B and N to the common ground
point.
2. In PQ Log, select the measuring range with P-P logging and matching
nominal voltage.
3. Enter the correct converter/transformer ratio for current and voltage.
egb007.bmp
Figure 11. PQ Log Settings for a 16 kV Network
Note
Current clamp sets are available for 1 A current transformer.
Logging
When the Logger is connected and ready, you can perform three types of
logging:
•
Switch-activated job: The status LED is blinking. Press the
START/STOP button once. As soon as the job is active, the LED is
on continuously. If needed, the job can be cancelled after running for
at least one minute, and restarted later.
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Users Manual
•
Time-activated job: The Logger starts logging as soon as the
preprogrammed start time is reached, and stops at the defined end
time.
•
Immediate job: The Logger starts logging as soon as power is on.
Note the following about logging jobs:
•
The connection can be verified using the logging channel LEDs. If all
three LEDs are lit continuously, the connection and the signal levels
are within nominal range. For details, see Table 4 in the Features
section.
•
The unit/job status is indicated by the status LED. For details, see
Table 4 in the Features section.
Completing the Logging Job
1. Terminate the job as follows:
•
For switch-activated jobs: At the end of the logging period, stop
the logging job by pressing the START/STOP button.
•
For time-activated and immediate jobs: Stop the job in PQ Log
with the
icon, or with menu Logger/Stop logging.
Note
Make sure the logging job is stopped with the START/STOP button
(switch-activated jobs) or PQ Log (time-activated jobs) before the test
leads or power supply leads are removed. Otherwise, the Logger will
record a voltage interruption.
Only switch-activated jobs can be aborted. Time-activated jobs are
terminated only when the programmed measuring time has elapsed.
2. Remove the test leads of the three phases. Be sure to remove the
measuring cable of the neutral wire last.
3. Remove the current probes.
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Power Quality Logger
Methods of Logging
Evaluating the Logged Data
You’ll use PQ Log to evaluate the logged data. Data can be read out during
logging as well as at the end.
1. Connect the Logger to line power.
2. Connect the RS232 interface cable to your PC’s serial port, then to the
Logger.
3. Start the PQ Log software.
4. Use PQ Log to transfer the data from the Logger to the PC.
5. Once the data is transferred, remove the RS232 interface cable and
operating power from the Logger.
6. Evaluate the data using PQ Log.
For details, refer to the PQ Log manual.
Methods of Logging
The following section describes methods of logging using the 1744/1743
Logger.
Measuring Ranges
The Logger has three input ranges for each of its two connection systems: Wye
connection (3-phase, 4-wire) and Delta connection (3-phase, 3-wire).
Table 6. Measuring Ranges
Connection
Nominal Voltages (Wye/Delta) Max. Input Voltage
Wye/Delta
69 V / 120 V
115 V / 200 V
115 V ~, +20%
230 V / 400 V
230 V ~, +20%
480 V / 830 V
480 V ~, +20%
Phase/Neutral
3-phase 4 wire
69 V ~, +20%
Phase/Phase
120 V ~, +20%
200 V ~, +20%
400 V ~, +20%
830 V ~, +20%
3-phase 3 wire
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egb015.bmp
Figure 12. Selecting Voltage Input Ranges During Job Processing
Note
For P-P logging, the P-P voltage must be entered as the nominal
voltage (e.g. 400 V for 230 V systems).
Signal Sampling
Input signals (up to three voltages and four currents) are filtered with an anti-
aliasing filter, and digitized with a 16-bit A/D converter. The sampling rate is
10.24 kHz. All parameters are calculated from this data.
Resolution Accuracy
Resolution and accuracy depend on the logging parameter. For details, see
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Power Quality Logger
Methods of Logging
Technical Specifications” on page 46.
Voltage Variations
The interval value of the voltage is defined as the mean value of the RMS
values over the interval length defined in PQ Log.
Averaging intervals can be set in PQ Log to the following:
•
•
1, 3, 5, 10, or 30 seconds
1, 5, 10, 15, or 60 minutes
1 Interval
V
N
Time
Measuring period
egb016.eps
Figure 13. Measuring Voltage Variations
Note
For logging in Wye configuration using logging function A, the
phase-phase voltages are measured and displayed separately from the
logging of the phase-neutral voltages.
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Min/Max Values
Logging detects the highest and lowest voltage RMS values and the highest
current RMS value during the test interval, using a minimum resolution of
10 ms.
The response time can be set in PQ Log to the following:
•
•
•
0.5 or 1 line power period
200 ms
1, 3, or 5 seconds.
U
Max. Value
Min. Value
t
Measuring Interval
egb017.jpg
Figure 14. Logging Min and Max Values
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Power Quality Logger
Methods of Logging
Voltage Interruptions
The Logger records two types of interruptions:
•
All measured RMS values of input voltages that are < 1% of the
nominal voltage. (This threshold can be adjusted in PQ Log.)
•
Interruptions > 10 ms (0.5 line power periods).
The start time and duration of each interruption are registered.
110% Un
100% Un
90% Un
1%
Time
Duration
egb018.eps
Figure 15. Voltage Interruption
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Voltage Dips and Swells
If the voltage passes the upper limit (VN + 10%) or lower limit (VN – 10%), the
event is registered as a voltage swell or dip, respectively (thresholds are
adjustable in PQ Log).
The duration, time, and extreme value of the dip or swell is also recorded.
Heigth
110% Un
100% Un
90% Un
Depth
Duration
Duration
Time
Zeit
egb019.eps
Figure 16. Voltage Dips and Swells
Voltage Harmonics
Voltage harmonics are defined as voltage components that have a frequency
that is an integer multiple of the fundamental frequency of the line power
voltage. Logging function A records each individual voltage harmonic, up to
the 50th order. These values are averaged over the interval length defined in
PQ Log.
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Power Quality Logger
Methods of Logging
Current Harmonics
Current harmonics are defined as current components that have a frequency
that is an integer multiple of the fundamental frequency of the line power
current. Logging function A records each individual harmonic of the phase
currents and the neutral current, up to the 50th order, and presents the
harmonics as absolute values. The values are averaged over the interval length
defined in PQ Log.
Mains Signaling
Voltage components that have frequencies that are not integer multiples of the
fundamental frequency of the line power voltage are called Mains Signaling
voltages or ripple-control voltages (“interharmonics”).
The Logger can be programmed to record up to five interharmonics, with a
resolution of 5 Hz. This function can also be used to monitor ripple-control
signals, by entering the signal frequency of the local utility.
The Logger measures the three-second RMS value of each interharmonic, and
establishes statistics for EN 50160 evaluation. These statistics are available
after a minimum recording time of 24 hours, or after regular termination of the
measuring job, and can be exported from PQ Log and evaluated later.
Additionally, the Logger provides a long-term recording of the interharmonics.
You can select from the following special measurement methods in the PQ
Log software:
•
200 ms maximum value (recommended for estimating ripple-control
signal levels)
•
•
•
200 ms minimum value
3 seconds maximum value
Average value over interval
In PQ Log, the frequency can be entered with a resolution of 0.5 Hz, but for
evaluation the values are corrected to a bandwidth of 5 Hz. One frequency can
be defined for each band: for example, for a ripple-control signal of 183 Hz,
the values will be corrected to 185 Hz. Interharmonics of voltages and currents
with these frequencies are recorded.
See the PQ Log manual for details.
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Users Manual
THDV – In Function A
50
V 2
∑
n
n=2
Function A: THDV =
V1
Vn: RMS value of harmonic frequency #n.
V1: RMS value of the fundamental frequency.
THDV: total contents of harmonics of the line power voltage as a percentage
of the fundamental.
This algorithm is according to EN 61000-4-7.
THD of currents:
50
2
I
∑
n
n=2
THDI =
50
2
I1
Function A:
and THDI(
A
)
=
I
∑
n
n=2
In: RMS value of harmonic frequency #n.
I1: RMS value of the fundamental frequency.
THDI: total contents of harmonics of the current as a percentage of the
fundamental.
34
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Power Quality Logger
Methods of Logging
Calculation of THD in Measuring Function P
THD – Measuring Function P
Function P does not measure harmonic values.
VRMS −V12
2
Voltages:THDV =
V1
V
RMS: RMS value of total signal
V1: RMS value of the fundamental
2
2
IRMS − I1
Currents: THDI =
I1
I
RMS: RMS value of the total signal.
I1: RMS value of the fundamental.
Note
THDI for currents < 5% of IE (measuring range) can have additional
uncertainties, or can be suppressed.
Harmonics up to 50th order are taken into account.
Flicker
Flicker is the visual impression of unsteadiness in a light source whose
luminance or spectral distribution changes over time. Flicker is logged in
accordance with the IEC 61000-4-15 standard. The short-term (st) flicker Pstt
is logged over a default standard interval of 10 minutes, and is used to
calculate the long-term (lt) flicker Plt (by taking the sliding average of 12
short-term values). The interval value can be changed as needed in PQ Log.
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Users Manual
Formula for Plt Function
Pst3
12
3
Plt =
∑
12
i=1
Flicker [%]
Time
12 x interval length => 1 flicker value Plt
Interval length => 1 Pst
egb020.eps
Figure 17. Measuring Flicker Values
Unbalance
The ratio of negative-to-positive sequence harmonics is calculated, with the
angles and magnitudes of the phase voltages taken into account. These values
are averaged over the interval length defined in PQ Log.
Frequency
The line power frequency is measured and averaged over 10 seconds, and the
resulting values are divided into 42 classes for establishing statistics. Values
are also averaged over the interval length defined in PQ Log.
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Power Quality Logger
Methods of Logging
Current Logging
The maximum values of the currents (L1 or A, L2 or B, L3 or C, and N) are
measured, and the interval value of the current is calculated using the mean
value over the RMS values of the interval defined in PQ Log.
Logging Function A
If a 3-phase current sensor is connected, the neutral current is calculated on a
sample basis from the phase currents. If a 3-phase+N sensor is detected, you
can select between logging and calculating the neutral current in PQ Log.
I
peak
The peak values of the current (samples, not RMS values) are averaged in the
PQ Log software over the predefined measuring interval.
Note
Short peak values do not contribute much to the average value, and so
I
max can be higher than Ipeak.
Crest Factor (CF)
The crest factor (CF) of the currents (L1 or A, L2 or B, L3 or C, and N) is the
ratio of current peak value divided by current RMS value, and is averaged over
the interval length defined in PQ Log. For sinusoidal signals: CF = 1.41, and
for square waves: CF = 1.00
Power
The power values (L1 or A, L2 or B, L3 or C and N) are averaged over the
interval length, and the maximum value of each is recorded.
The response time can be set to 1 second or 1 minute, and is independent of the
response time for voltage and current.
In logging function P, the active power, apparent power, and reactive power of
the phases and total power of all three phases is calculated.
Logging function A also calculates the distorting power D of the phases, and
Dtotal
.
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Logger Parameters with Function P
The following are the parameters of the 1744/1743 Logger with function P.
N
1
RMS value of voltage and current.
Basic values on 200 ms per phase.
Vbas
=
=
⋅
⋅
V 2
∑
i
N
i=1
N
1
2
Ibas
I
∑
i
N
i=1
N: Number of samples in 200 ms intervals
(2048)
M
1
RMS value of voltage and current
per logging interval per phase
VRMS
=
=
⋅
⋅
V
∑
bas
j
M
j=1
M
1
IRMS
I
∑
bas
j
M
j=1
M: Number of 200 ms intervals per
logging interval
N
1
Active power based on samples.
Basic value on 200 ms per phase.
P
=
V ⋅ I
∑
bas
i
i
N
i=1
M
1
Active power per logging interval
per phase
P =
⋅
P
∑
bas
j
M
j=1
Pbas: 200 ms value
M: Number of 200 ms intervals per
logging interval
3
Total active power on all three
phases
P
=
P
∑
total
k
k=1
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Power Quality Logger
Logger Parameters with Function P
Pk: Active power of the phase
k: Phase (k = 1, 2, 3)
M
1
Absolute value of the active power
per interval per phase. Parameter in
PQ Log: |P|.
P
=
⋅
P
∑
betr
bas
j
M
j=1
M: Number of 200 ms intervals per
logging interval
3
Sum of the absolute value of the total
active power on all three phases. PQ
P
=
(
P
)
k
∑
betrtotal
betr
k=1
Log parameter: |P|total
.
K: Phase (k = 1, 2, 3)
2
2
Apparent power per phase
Sbas = P + Qbas
bas
M
1
Apparent power per logging interval
per phase
S =
⋅
S
∑
bas
j
M
j=1
3
Total apparent power on all three
phases
Stotal
=
S
∑
k
k=1
Power factor per phase
P
S
Q
Q
PF = λ =
⋅
Total power factor on all three
phases
P
Qtotal
total
PF = λtotal
=
⋅
total
Stotal Qtotal
Tangent φ per phase
Q
tanϕ =
P
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Tangent φ total on all three phases
Qtotal
tanϕtotal
=
P
total
Active energy per phase and total
Active power accumulated on each
logging interval
Note
The sign of the active power P gives the direction of the power flow
(positive: from generator to load), and the sign of the power factor
distinguishes between inductive load (positive) and capacitive load
(negative).
Sign of PF, tan φ, cos φ:
•
•
Sign “+” : Q positive (“inductive”)
Sign “–” : Q negative (“capacitive”) independent of the sign of active
power P
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Power Quality Logger
Logger Parameters with Function A
Logger Parameters with Function A
The following are the parameters of the 1744/1743 Logger with function A.
TRMS value of voltage
and current. Basic values
on 200 ms per phase.
N
1
Vbas
=
=
.
V 2
i
∑
N
i=1
N
1
2
Ibas
⋅
I
∑
i
N
i=1
N: Number of samples in 200 ms intervals (2048)
RMS value of voltage and
current per logging
interval per phase
M
1
VRMS
=
=
.
V 2
basj
∑
M
j=1
M
1
IRMS
⋅
I 2
bas
j
∑
M
j=1
M: Number of 200 ms intervals per logging interval
Active power calculated
from FFT from samples
of voltage and current.
Basic value on 200 ms per
phase.
P = Vn .In .cosϕn
n
Vn: RMS value of voltage harmonics of order n
In: RMS value of current harmonics of order n
n: Order of the harmonics
φn: Phase angle between current and voltage
harmonics of order n
Pn : Harmonics of the active power of order n
Fundamental
50
P
=
P
∑
bas
n
n=1
Ph1bas = P
1
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Active power of logging
interval per phase
M
1
P =
⋅
P
∑
bas
j
M
j=1
Pbas j to 200 ms value
M: Number of 200 ms intervals per logging interval
Total active power on all
three phases
3
P
=
P
∑
total
k
k=1
Pk: Active power of the phase
k: Phase (k = 1, 2, 3)
Absolute value of the
active power per interval
per phase
M
1
P
=
⋅
P
∑
betr
bas
j
M
j=1
Sum of the absolute
values of the active power
on all three phases
M
1
P
=
P
+ P + P
∑
betr
bas
bas
bas
total
1
2
3
M
j=1
Apparent power based on
RMS values of voltage
and current. Basic values
on 200 ms per phase
Sbas = Vbas .Ibas
Apparent power per
logging interval per phase
M
1
S =
⋅
S
bas
∑
j
M
j=1
Sbas j: 200 ms value
M: Number of 200 ms intervals per logging interval
Total apparent power on
three phases
3
Stotal
=
S
k
∑
K =1
k: Phase (k = 1, 2, 3)
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Power Quality Logger
Logger Parameters with Function A
Distortion power. Basic
value on 200 ms per
phase
2
2
2
Dbas = Sbas − P − Qbas
bas
Distortion power per
interval per phase
M
1
D =
⋅
D
bas
∑
j
M
j=1
Dbas j : 200 ms value
M: Number of 200 ms intervals per logging interval
Total distortion power on
three phases
3
Dtotal
=
D
∑
k
k=1
Distortion power per
phase
P
S
Q
Q
PF = λ =
⋅
Total distortion power on
three phases
P
Qtotal
total
PF = λtotal
=
⋅
total
Stotal Qtotal
Tangent φ per phase
Q
tanϕ =
P
Total tangent φ on three
phases
Qtotal
tanϕtotal
=
P
total
Active power of the
fundamental per phase
Basic value for 200 ms.
Ph1bas = P
1
Active power of the
fundamental per phase per
interval
M
1
Ph1bas
=
⋅
Ph1
∑
bas
j
M
j=1
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Total active power of the
fundamental for three
phases
Ph1total = ⋅ 3 Ph1
∑
k
k=1
Apparent power of the
fundamental per phase.
Basic value for 200 ms.
Sh1bas = V1.I1
Apparent power of the
fundamental per phase per
interval
M
1
Sh1 =
⋅
Sh1
bas
∑
j
M
j=1
Power factor of the
fundamental per phase
Ph1total
Sh1
Qh1
Qh1
cosϕ1 =
cosϕ1total
⋅
Total power factor on all
three phases
Ph1total
Sh11 + Sh12 + Sh13 Qh1total
Qh1total
=
⋅
Active energy per phase
and total
Active power accumulated on each logging interval
Sign of PF, tan φ, cos φ:
•
•
Sign “+” : Q positive (“inductive”)
Sign “–” : Q negative (“capacitive”) independent of the sign of active
power P
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Power Quality Logger
Maintenance
Maintenance
WCaution
Maintenance work on the Logger can be done only by
trained and qualified personnel at a company-approved
service center within the warranty period. For locations of
Fluke Service Centers worldwide and contact information,
With proper use, the Logger does not require special maintenance other than
periodic calibration at a Fluke calibration center.
If the Logger gets dirty, wipe it off carefully with a damp cloth without
cleaning agents.
Lithium Battery
The 1744/1743 Logger contains a vanadium pentoxide lithium rechargeable
battery. This battery is automatically recharged during normal operation.
Disposal
If you discard the Logger, you must recycle it at an appropriate recycling
center as required by local regulations.
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1744/1743
Users Manual
Technical Specifications
Logging Parameters – Overview
The following table gives an overview of the logging parameters.
Table 7. Logging Parameters – Overview
Measuring Function
P
A
Voltage: mean, min, max
values
z
z
Current: mean, max values
Neutral current N
z
z
z
z
z
z
z
z
Voltage events
Power: P, |P|, S, D, PF,
tangent
Power total P, |P|, S, D, PF,
tangent
z
z
Energy
z
z
z
z
z
z
Flicker: Pst, Plt
Voltage harmonics
Current harmonics (L1 or A,
L2 or B, L3 or C, N,
up to 50th order)
Interharmonics, ripple-control
signals
z
THDV (voltage)
THDI (current)
CF (crest factor current)
Unbalance
z
z
z
z
z
z
z
Frequency
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Power Quality Logger
Technical Specifications
Maximum Number of Intervals for Logging Function P
The maximum recording period can be calculated by multiplying the interval
time defined in PQ Log with the maximum number of intervals in the
following table.
Version
P, V+I
A, V+I
Averaged
periods
> 24,000
> 10,000
General Information
Intrinsic uncertainty
Valid for reference conditions, and guaranteed for
two years.
Quality system
Developed, designed, and manufactured according to
DIN ISO 9001.
Recalibration interval
Reference conditions
Fluke recommends a recalibration interval of no
more than two years, depending on use.
23 C ± 2 K, 230 V ± 10%
50 Hz ± 0.1 Hz / 60 Hz ± 0.1 Hz
Phase sequence: L1 or A, L2 or B, L3 or C
Interval length: 10 minutes, 3-phase Wye
configuration.
Power supply: 88 to 265 V ac
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1744/1743
Users Manual
Environmental Specifications
Working temperature
range
–10 °C to +55 °C
Operating temperature
range
0 °C to +35 °C
Storage temperature range –20 °C to +60 °C
Reference temperature
23 °C ± 2 K
range
Relative humidity
Housing
10 to 90%, no condensation
Robust, compact housing of CYCOLOY
IP65 per EN 60529
Protection
Safety
EN 61010-1 600 V CAT III, 300 V CAT IV
pollution degree 2, double insulation
Type test voltage
5.2 kV ac, 50 Hz / 60 Hz, 5 s
EMC
Emission
Immunity
IEC/EN 61326-1, EN 55022
IEC/EN 61326-1
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Power Quality Logger
Technical Specifications
Power Supply
Functional range
Safety
88 to 660 V RMS ac absolute, 50 Hz / 60 Hz
EN 61010-1 600 V CAT III, 300 V CAT IV,
pollution degree 2, double insulation
Fuse
Power supply fuse can be replaced only in service
facility. Supply can be connected in parallel to
measuring inputs (up to 660 V RMS ac).
Power consumption
Memory capacity
Intervals
5 W
8 MB Flash-EPROM
> 5.600 intervals, > 39 days with 10-min intervals
Events
> 13.000
Memory model
Interface
Linear, circular
RS232, 9600 to 115000 Baud, automatic selection,
3-wire communication.
Dimensions
Weight
170 mm x 125 mm x 55 mm
Approx. 0.9 kg
Measurement
A/D converter
16 bit
Sampling frequency
Anti-aliasing filter
Frequency response
Interval length
10.24 kHz
FIR-Filter, f = 4.9 kHz
C
Uncertainty < 1% of Vm for 40 to 2500 Hz
1, 3, 5, 10, or 30 seconds,
1, 5, 10, 15, or 60 minutes
Averaging time for
min/max values
½ , 1 line power period
200 ms
1, 3, 5 s
Time base
Resolution: 10 ms (at 50 Hz) deviation: 2 s/day
at 23 °C.
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Users Manual
Input Voltage
Input range VI P-N:
Input range VI P-P
Max overload voltage
Input range selection
Connections
69, 115, 230, or 480 V ac
120, 200, 400, or 830 V ac
1.2 VI
By job programming
P-P or P-N, 1- or 3-phase
≤ 999 kV (using PTs and ratios)
Nominal voltage VN
Input resistance
Approx. 820 keper channel. Lx-N
Single phase (L1 or A, L2 or B, L3 or C connected):
app. 300 ke
Intrinsic uncertainty
Voltage transformer
Ratio selection
0.1% of VI
Ratio : < 999 kV / VI
By job programming
Current Input with Flexi Set
Input ranges II L1 or A, L2 15, 150, 1500, or 3000 A ac
or B, L3 or C, N:
Measuring range
Intrinsic uncertainty
Position influence
0.75 A to 3000 A ac
< 2% of II
Max. ±2% of m.v. for distance conductor to
measuring head >30 mm
Stray field influence
<± 2 A for Iext= 500 A ac and distance to measuring
head >200 mm
Temperature coeff.
Current transformer
Ratio selection
Connection
0.005% / K
Ratio : ≤ 999 kA / II
By job programming
3-phase, 3-phase + N 2-phase L1 or A and L3 or C
(2 W-meter-method) 7-pole connector
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Power Quality Logger
Technical Specifications
Current Input for Clamp
Input signal:
0.5 V ac nominal (for II) 1.4 V peak
Intrinsic uncertainty
Max. overload
< 0.3% of II
10 V ac
Input resistance
Current transformer
Ratio selection
App. 8.2 ke
Ratio : ≤ 999 kA / ≤ II
By job programming
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1744/1743
Users Manual
General Specifications
RMS Logging Slow Voltage Variations
Logging values: Mean value
Min, Max values
RMS values averaged over interval length
Averaging with selectable averaging time from
0.5 periods to 5 s
Max value
Min value:
Max 10 ms RMS value per interval
Min 10 ms RMS value per interval
Current Logging Values
Mean value
RMS values averaged over interval length
Highest RMS value per interval
Max value
Events Dips, Swells, Interruptions
Limit value
Variable
Lower limit: 0 to 95% VN
Upper limit: 105 to 120% VN
Set in PQ Log
Range
0 to VI + 20%
Logging value
Operating uncertainty
Response time
½ period RMS value
< 2% of VI
½ line power period
Flicker
Logging value
Flicker severity (Pst / Plt) according to
IEC 61000-4-15
Intrinsic uncertainty Pst
Measuring range Pst
< 5% of m. v
0.4 to 4
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Power Quality Logger
Technical Specifications
Power (Logging Functions A, P only) P, S, |P|
Active power P
Distorting power D
Max value
As per EN 61036, class 2
As per EN 61268, class 2 (A-version only)
Highest value per interval
Smallest value per interval
< 0.3 degrees
Min value
Phase uncertainty
Conditions
Conductor centered within clamp jaws or
Flexi Set
Harmonics
Vm, Im, THDV, THDI per IEC/EN 61000-4-7, class B
Voltage harmonics (function A)
intrinsic uncertainty:
For Vm < 3% VN: < 0.15% VN
For Vm ≥ 3% VN: < 5% Vm
For Im < 10% IN: < 0.5% IN
For Im ≥ 10% IN: < 5% Im
For THDV < 3%: < 0.15%
For THDV ≥ 3%: < 5%
Current harmonics (function A)
intrinsic uncertainty
THDV (function A) intrinsic
uncertainty at VN
THDV (function P) intrinsic uncertainty For THDV < 3%: < 1%
at VN
For THDV ≥3%: < 5%
THDI (functions A, P) intrinsic
uncertainty at II
For THDI < 3%: < 2%
For THDI ≥ 3%: < 5%
Statistics
Frequency
42 classes for 10 s mean values
Ripple-control signals
Interharmonics
21 classes for 3 s mean values
Analysis of logging data
Programming and analysis is done by PQ Log software on PC.
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1744/1743
Users Manual
Logging Function P
Logging Values
Voltage L1 or A, L2 or B, L3 or C: phase-phase or phase-neutral:
•
•
•
•
Voltage (mean, min, and max values)
THDV (mean, and max values)
Flicker Pst, Plt
Voltage events (dips, swells, interruptions)
Current L1 or A, L2 or B, L3 or C, and N:
•
Current (mean, max values), THDI
Power:
•
•
•
•
•
Active power P (mean, min, and max values)
Absolute values active power |P| (mean, min, and max values)
Apparent power S (mean, min, and max values)
Power Factor PF, tangent
Energy per averaging interval
Total Power:
•
•
Total power P, |P|, S
3-wattmeter and 2-wattmeter method (Aron circuitry)
Application
Power logging:
•
•
Long-term analysis of active, reactive, apparent power
Long-term analysis of power factor, symmetry
Disturbance analysis:
•
Examination of voltage dips and swells, flicker measurement
Network optimization:
•
•
Load measurements, acceptance of new loads
Efficiency of compensation systems
54
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Power Quality Logger
Technical Specifications
Logging Function A – “All” parameters
Logging Values
All parameters for voltage quality per EN 50160:
Voltage L1 or A, L2 or B, L3 or C: phase-phase or phase-neutral:
•
•
•
•
•
•
•
•
•
Voltage (mean, max, min values)
Voltage harmonics 1st to 50th order
THDV (harmonic contents of voltage)
Interharmonics 5 to 2500 Hz (in steps of 0.5 Hz)
Flicker Pst,Plt
Unbalance
Signaling voltages
Frequency
Voltage events (dips, swells, interruptions)
Current L1 or A, L2 or B, L3 or C, and N:
•
Current (mean, max values)
•
Harmonics of phase and neutral currents up to 50th order
•
Crest factor and peak values of the currents
Power:
•
•
•
•
•
•
Active power P (mean, min, and max values)
Absolute values active power |P| (mean, min, and max values)
Distorting power D (mean, min, and max values)
Apparent power S (mean, min, and max values)
Power Factor PF, tangent
Energy per averaging interval
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1744/1743
Users Manual
Total power:
•
•
•
•
Total power P, |P|, D, S
3-wattmeter method
2-wattmeter method (Aron circuitry)
2 ½ wattmeter method
Applications
Power quality:
•
Voltage quality analysis according to EN 50160 over a 1-week period
(time-activated job)
•
Examination of measurement quantities per standards
Disturbance analysis:
•
•
•
•
•
Long-term analysis of line power voltage
Examination of voltage dips, swells, and harmonic problems
Flicker measurement
Examination of ripple control signals (level)
Specific search for disturbances through correlation of relevant
logging quantities (e.g. current, voltage, and flicker), time of
occurrence, periodicity
Network Optimization:
•
•
•
Load logging
Current logging (with Flexi Set 5 to 3000 A or clamps 1 to 1000 A)
Capture of current peaks
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Power Quality Logger
PQ Log PC Application Software
PQ Log PC Application Software
PQ Log software for Windows® PCs is the application for use with the
1744/1743 Power Quality Logger. The data are also available in ASCII format.
Programs available for setting up the Logger:
•
Interval length
•
Memory model
•
Voltage input range, nominal voltage, nominal current
Response time for min, max values
Connection type (P-N, P-P)
•
•
•
Thresholds for event detection, interruptions
Setup:
•
Internal clock (date/time)
•
Define 1744/1743 Power Quality Logger designation
Parameters for data export
•
•
Software updates
Analysis:
•
•
•
ASCII data export
Graphical summary of all EN 50160 parameters
Online test function
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1744/1743
Users Manual
Online Test
The following figure shows the online test display.
egb024.bmp
Figure 18. Online Test
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Power Quality Logger
PQ Log PC Application Software
ASCII Export
The following figure illustrates the ASCII export display:
egb025.bmp
Figure 19. ASCII Export
For special cases, additional evaluations are available:
•
•
•
•
•
•
•
•
•
•
Graphic representation of measured data
Timeplot diagrams
Application oriented analysis
Logging value list
Table of events (UNIPEDE DISDIP)
Table summary
Cumulative frequency, harmonics (logging function A only)
Statistical values (logging function A only)
All exceeding table (logging function A only)
Most critical values (logging function A only)
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Users Manual
Timeplot diagram
The following figure shows a typical Timeplot diagram:
egb026.bmp
Figure 20. Timeplot Diagram
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Power Quality Logger
PQ Log PC Application Software
UNIPEDE DISDIP Table
The following figure shows a typical UNIPEDE DISDIP table:
egb027.bmp
Figure 21. UNIPEDE DISDIP Table
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Users Manual
Cumulative Frequency – Harmonics
The following figure shows a typical display of cumulative frequencies for
current and voltage harmonics:
egb028.bmp
Figure 22. Cumulative Frequency – For Voltage and Current Harmonics
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Index
Logging Configurations, 10
Logging input for voltages, 9
Logging segments, 11
Logging with two voltage converters and
two current transformers, 24
—A—
Anti aliasing filter, 28
Apparent Power, 37
—C—
—M—
Completing the Logging, 26
Connecting the clip on probes, 14
Connection modes, 27
Connections for Medium Voltage
Networks, 21
Maximum nominal voltages, 6, 16
Memory model, 11
Methods of Logging, 27
—N—
Crest Factor, 37
Current, 37
Nominal Voltages, 27
Current Harmonics, 33
—P—
—D—
Phase-N, 11
Disposal, 45
Phase-Phase, 11
Power factor, 37, 39
—E—
—R—
Energy, 40
Evaluation, 27
Extreme values, 29
Reactive Power, 37
—F—
Sampling rate, 28
Flicker, 35
signaling voltages, 11
Frequency, 36
Signaling voltages, interharmonics, 33
—I—
Installation at the measuring site, 17
Interharmonics, 11
THD I, 35
THD V, 34
Interval length, 11
—U—
I
, 37
peak
Unbalance, 36
User Interface, 1
—L—
Limit values for events, 11
Lithium Battery, 45
—V—
Voltage dips/swells, 32
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Users Manual
Voltage Harmonics, 32
Voltage interruptions, 31
Voltage variations, 28
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