Fluke 1740 Series
Three-Phase Power Quality Loggers
Memobox
Technical Data
Assess power quality and conduct
long-term studies with ease
Compact and rugged, the Fluke 1740 Series three-phase power
quality loggers are everyday instruments for technicians who
troubleshoot and analyze power distribution systems. Capable
of simultaneously logging up to 500 parameters for up to 85
days and capturing events, the Fluke 1740 Series helps uncover
intermittent and hard-to-find power quality issues. The included
PQ Log software quickly assesses the quality of power at the
service entrance, substation, or at the load, according to the
latest EN50160 standard.
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Plug and play:
Setup in minutes with auto-
matic current probe detection and powering
Installs inside the cabinet: Compact, fully-
insulated housing and accessories fit easily
in tight spaces, next to live power
Determines the root cause: Included PQ Log
software quickly analyzes trends, creates
statistical summaries, and generates detailed
graphs and tables
Monitors power for the long-term: Data
can be downloaded during recording without
interruption
Measure voltage with premium accuracy:
IEC61000-4-30 Class-A compliant voltage
accuracy (0.1 %)
Quickly validate quality of power: Assess
power quality according to EN50160 power
quality standard, with statistical overview
Rugged and reliable: Designed for everyday
field use, with no moving parts and durable,
insulated case, with two year warranty
Applications
Disturbance analysis — Uncover root cause of
equipment malfunction for later mitigation and
predictive maintenance
Quality of service compliance — Validate
incoming power quality at the service entrance
Power quality studies — Assess baseline power
quality to validate compatibility with critical
systems, before installation
Load studies — Verify electrical system capacity
before adding loads
Energy and power quality assessment —
Validate performance of facility improvements
by quantifying energy consumption, power factor,
and general power quality, before and after,
improvements
Plug and play
All three 1740 Series loggers feature easy plug and
play setup, for immediate use. The current probes
are connected to the logger with a single plug. The
instrument automatically detects, scales, and pow-
ers the probes using line power from the measured
voltages. All accessories are individually calibrated
and can be shared with multiple Fluke 1740 series
loggers. Once it is connected, logging begins with
the touch of a single button!
Electrical shock protection
The Fluke 1740 loggers feature double insulated
enclosures and accessories to help prevent electrical
shock when coming into contact with blanket bus
bars, terminals, or cables. They are also designed to
meet the stringent safety standards for use in 600 V
CAT III and 300 V CAT IV environments.
Loggers for every application
The portable Fluke 1740 Series power quality loggers are designed for easy instal-
lation and use, anywhere in low- and medium-voltage applications. There are three
models to choose from to meet your basic or advanced power logging needs:
Fluke 1743: IP65 water-proof model for logging the most common power param-
eters including V, A, W, VA, VAR, PF, energy, flicker, voltage events, and THD.
Fluke 1744: Includes the same features as the Fluke 1743. In addition to common
power parameters, the Fluke 1744 also measures voltage and current harmonics,
interharmonics, mains signaling, unbalance, and frequency.
Fluke 1745: Advanced IP50 power quality logger with the same measurement
capability as the 1744, plus real-time LCD and five hour UPS.
Power quality logger selection table
1745
Measurement of common power parameters:
V, A, W, VA, VAR, PF, energy, flicker, voltage
events, and THD
Measurement of voltage and current harmonics
to the 50th, unbalance, and mains signaling
Dust/water resistance
Display
UPS ride-through
Dimensions (HxWxD)
1744
1743
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IP50
LED + LCD
5 hrs
8 mm x 16 mm x 74 mm
(11.5 in x 8.8 in x 3 in)
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IP65 water proof
LED
3 s
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LED
3 s
170 mm x 15 mm x 55 mm
(6.9 in x 5.1 in x . in)
Fluke Corporation 1740 Series Three-Phase Power Quality Loggers Memobox
Measure all power quality and power
parameters
The Fluke 1745 and Fluke 1744 log over 500
different parameters for each averaging period. This
allows you to analyze power quality in detail and
to correlate intermittent events, helping to identify
the root cause of disturbances. For basic power
logging, the Fluke 1743 captures all relevant power
parameters.
Calculates current harmonics
Fluke 1745 and Fluke 1744 loggers can calculate
the limits of current harmonics to predict overload
of the grid according to the standards VSE, VEOE,
VDN, among others. This powerful predictive main-
tenance feature enables current harmonics to be
observed before a distortion appears in the voltage.
View graphs and generate reports
with Fluke PQ Log software
With its easy-to-use interface, the included PQ Log
software assists you with logger setup, enables
you to verify actual measurement values quickly
using the online function, and downloads data
from the logger to a connected PC operating on
standard Windows
®
operating systems. You can
view the logged data in graphical and tabular
form, export it to a spreadsheet, or generate a pro-
fessional report with the Report Writer function.
For root cause analysis, different measurements such as
flicker, voltage and THD can be shown in the same time
plot, helping to quickly identify the cause of a disturbance.
Statistical summaries like EN50160 and DISDIP table provide a quick,
comprehensive summary. The EN50160 overview display provides a simple
display of 8 power quality parameters on one dashboard, according to the latest
international power quality standard.
Statistical analysis of Voltage and Current harmonics over a
given time period. Red bar graphs indicate issues with the
grid. Other colors are warnings for pontential future issues.
Harmonics can be presented also as time plots.
3 Fluke Corporation 1740 Series Three-Phase Power Quality Loggers Memobox
Specifications
General
Intrinsic error
Warranty
Recalibration interval
Quality system
Reference conditions
Refers to the reference conditions and is guaranteed for two years
years
years recommended
developed, designed, and manufactured according to DIN ISO 9001
3 °C ± K; 74 °F ± K , Vm = 30 V ± 10 %
50 Hz ± 0.1 Hz or 60 Hz ± 0.1 Hz
phase sequence L1, L, L3
interval length: 10 minutes
Wye connection (L1, L, L3 to N)
Power supply: 88 V to 65 V ac
Ambient conditions
Working temperature range
Storage temperature range
Reference temperature range
Relative humidity
Housing
Environmental protection
Safety
-10 °C to 55 °C (14 °F to 131 °F)
-0 °C to 60 °C (-4 °F to 140 °F)
3 °C ± K (74 °F ± K)
Fluke 1745: Class B acc. IEC 60654-1
Fluke 1744/43: Class C acc. IEC 60654-1
robust, fully insulated housing and accessories
Fluke 1745: IP50 as per EN6059
Fluke 1744/43: IP65 as per EN6059
IEC/EN 61010-1 600 V CAT III
300 V CAT IV, pollution degree
Type test voltage
double insulation
5. kV rms, 50 Hz/60 Hz, 5 s
EMC
Emission
Immunity
IEC/EN 6136-1, EN550
IEC/EN 6136-1
4 Fluke Corporation 1740 Series Three-Phase Power Quality Loggers Memobox
Voltage and current measurement
Input voltage
Input range V
I
P-N
Input range V
I
P-P
Max. overload voltage
Input range selection
Connections
Nominal voltage V
N
Input resistance
Intrinsic uncertainty
Voltage transformer
Ratio selection
max 480 V ac
max 830 V ac
1. V
I
By job programming
P-P or P-N, 1- or 3-phase
≤ 999 kV with PTs and ratio
App. 80 kΩ per chan. Lx-N Single phase (L1 or A, L or B, L3 or C connected): app. 300 kΩ
0.1 % of V
I
Ratio: < 999 kV / V
I
By job programming
Current input with Flexi-Set
Input ranges I
I
(L1 or A, L2 or B, L3 or C, N)
Measuring range
Intrinsic uncertainty
Position influence
Stray field influence
Temperature coefficient
Current transformer
Ratio selection
Connection
15 A/150 A/1500 A/3000 A ac
0.75 A to 3000 A ac
< % of I
I
Max. ± % of measured value – for distance conductor to meas. head > 30 mm
< ± A ac for I
ext
= 500 A ac and distance to measuring head > 00 mm
< 0.05 %/K
Ratio ≤ 999 kA/I
I
By job programming
3-phase, 3-phase +N, phase L1 or A and L3 or C ( W-meter-method) 7 pole connector
Current input for clamp
Input ranges I
I
(L1 or A, L2 or B, L3 or C, N)
Intrinsic uncertainty
Max. overload
Input resistance
Current transformer
Ration selection
Power configurations
0.5 V nominal (for I
I
) 1.4 Vpeak
< 0.3 % of I
I
10 V ac
App. 8. kΩ
Ratio ≤ 999 kA/I
I
By job programming
Delta, -Element Delta, Wye, Single Phase, Split Single Phase
5 Fluke Corporation 1740 Series Three-Phase Power Quality Loggers Memobox
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