Fluke 1742, 1746 and 1748 Three-Phase Power Quality Loggers


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Fluke 1742, 1746 and 1748 Three-Phase Power Quality Loggers

The Fluke 1742, 1746 and 1748 Three-Phase Power Quality Loggers give you fast, easy access to the data you need to make critical power quality and energy decisions in real-time. With the included Energy Analyze Plus software package you can easily create detailed reports.

Get the Fluke Guide to Choosing Power Quality Tools  _

Upgrade according to future needs

The Fluke 1748 logs over 500 different parameters for each averaging period. This allows you to analyze power quality in detail and to correlate intermittent events with detailed waveform data, helping to identify the root cause of disturbances. For basic power quality logging, the Fluke 1746 captures all relevant power parameters for performing energy saving studies and electrical network planning with a full upgrade option to 1748 available. For simple load and energy studies the Fluke 1742 offers optimal performance in a rugged package and can be upgraded to 1746, or complete 1748, functionality.

National and international standards

Compact and rugged, the Fluke 1740 Series Three-Phase Power Quality Loggers are designed specifically for technicians and engineers who need the flexibility to troubleshoot, quantify energy usage and analyze power distribution systems. Fully compliant with international power quality standards such as IEC 61000-4-30 Class A and capable of simultaneously logging up to 500 parameters while also capturing events, the Fluke 1740 Series helps uncover intermittent and hard-to-find power quality issues more easily than ever. Energy Analyze Plus software quickly assesses the quality of power at the service entrance, substation, or at the load, according to national and international standards including EN 50160 and IEEE 519.

An optimized user interface, flexible current probes, and an intelligent measurement verification function that allows you to digitally verify and correct connections makes setup easier than ever and reduces measurement uncertainty. Minimize your time in potentially hazardous environments and reduce the hassle of suiting up in PPE by using a wireless connection (Wi-Fi) to view data directly in the field.

Analysis and reporting

Capturing logged data is just one part of the task. Once you have the data, you need to create useful information and reports that can be easily shared and understood by your organization or customers. Fluke Energy Analyze Plus software makes that task as simple as possible. With powerful analysis tools and the ability to create customized reports in minutes youÕll be able to communicate your findings and quickly solve problems so you can optimize system reliability and savings. A range of built-in report templates for industry standards such as EN 50160, IEEE 519 and GOST enable one-click reporting so you can create high quality reports at the touch of a button. Reports can be modified as standards evolve, or new versions become available.

Which power logger is right for you?

Voltage, current, power, power factor, frequency¥¥¥
Energy forward/reverse¥¥¥
Peak Demand¥¥¥
Voltage and current harmonics (to 50th)1 ¥¥
Unbalance1 ¥¥
Rapid voltage change events1 ¥¥
Interharmonics (to 50th)1 ¥¥
Dips, swells, interruption and transient events tables1 ¥¥
Inrush current1 ¥¥
Transients (low frequency) / Waveform deviation events2  ¥
Waveform snapshots2  ¥
RMS profile2  ¥
USB (mini B)¥¥¥
Wi-Fi download Instrument to device¥¥¥
Wi-Fi download via Wi-Fi hub (free with registration)Opt.Opt.Opt.
Included accessories
Flexible current probenot /B versionnot /B versionnot /B version
USB stick¥¥¥
USB cable¥¥¥
3PHVL-17XX cable assembly¥¥¥
FLUKE-17XX-TL 0.18M test lead set¥¥¥
FLUKE-17XX-TL 2M test lead set¥¥¥
Alligator clips444
173x/174x Soft Case¥¥¥
Cable marker kit¥¥¥
MP1-3R/1B-Magnet Probe 1 set (3 red, 1 black)Opt.11
174x-Hanger KitOpt.Opt.¥

Software features

  • "In-workshop" or "in-the-field" setup and download through PC application software: simple download using USB memory stick, Wi-Fi download, wired Ethernet connection or via USB cable.
  • Energy Analyze Plus application software: Download and analyze every measured detail of energy consumption and power quality state-of-health with automated reporting.
  • One-touch reporting: Create standardized reports according to commonly used standards like EN 50160, IEEE 519, GOST 33073 or export data in PQDIF or NeQual compatible format for use with third party software.
  • Advanced analysis: Choose any available logged parameter to create a highly customized view of logged measurements for advanced correlation of data.

Hardware features

  • Measure all three voltage and current phases plus the neutral current: Three-phase and neutral voltage leads and four flexible current probes or optional current clamps for CT secondary current.
  • Comprehensive logging: More than 20 separate logging sessions can be stored in the instrument. A comprehensive range of power and power quality variables are automatically logged so you never lose measurement trends.
  • Measure with premium accuracy: Meets the rigorous IEC 61000-4-30 Class A Edition 3 standard for ÔTesting and measurement techniquesÐPower quality measurement methods.'
  • Capture dips, swells and interruptions: The 1748 includes event waveform capture and RMS event profile, along with date, timestamp and severity information to help pinpoint potential root causes of power quality issues.
  • Measure key power quality parameters: Measures harmonics and interharmonics for voltage and current, also includes unbalance, flicker and rapid voltage changes.
  • Optimized user interface: Capture the right data every time with quick, guided, graphical PC based application setup and reduce uncertainty about your connections with an intelligent verification feature and the only auto-correction function for a power quality logger. Connection errors are automatically indicated via an amber light on the unitÕs power button, this light turns green once corrected.
  • Optimized user interface: Quick, guided, graphical setup ensures youÕre capturing the right data every time, and the intelligent verification function indicates correct connections have been made, reducing user uncertainty.
  • Flexible power supply: Powers directly from the measured circuit with the widest available range for a power quality logger automatically going from 100 V to 500 V or from a wall line cord, so you can test anywhere.
  • Rugged and reliable: Designed to withstand harsh installation environments with IP65 rating when used with IP65 voltage input adapter.
  • Two external USB ports: One for PC connection and another for quick, simple data download to standard USB thumb drives, allowing you to leave the measurement device in place and download without disrupting logging.
  • Ethernet connectivity: Wired and wireless connections for instrument setup and high-speed data download.
  • Compact size: Designed to fit in tight spaces and panels with small 23 cm x 18 cm x 5.4 cm (9.1 in x 7.1 in x 2.1 in) footprint.
  • Highest safety rating in the industry: 600 V CAT IV/1000 V CAT III rated for use at the service entrance and downstream.
  • Optimized measurement accessories: Unique tangle-free flat voltage cable and thin flexible current probes ensure easy installation even in tight spaces.
  • Battery life: Four-hour operating time (backup time) per charge on lithium-ion battery to withstand temporary power disruptions.
  • Security: Safeguard your best asset from theft with a standard chain or other security device.
  • Magnetic hanger kit: Conveniently stow the instrument safely inside or outside of electrical panels; compatible with all models and included with 1748 model as standard.

Key features

  • Measure key power quality parameters harmonics and interharmonics for voltage and current, unbalance, flicker and rapid voltage changes.
  • Measure with premium accuracy rigorous IEC 61000-4-30 Class A Edition 3 standard for ÔTesting and measurement techniquesÐPower quality measurement methods.'
  • One-touch standardized reporting including EN 50160, IEEE 519, GOST 33073 or export data in PQDIF or NeQual compatible format for use with third party software using Fluke Energy Analyze Plus Software.

ParameterRangeMaximum ResolutionIntrinsic Accuracy at Reference Conditions (% of Reading +% of Range)
Voltage1000 V0.1 V±0.1 % of nominal voltage 1, 2
Current: Direct inputi17xx-flex 1500IP 24 1500 A150 A0.01 A (min. 1.5A)3±(1% + 0.02%)
1500 A0.1 A
i17xx-flex 3000IP 24 3000 A300 A0.01 A (min. 3.0 A)3±(1% + 0.03%)
3000 A0.1 A
i17xx-flex 6000IP 36 6000 A600 A0.01 A (min. 6.0 A)3±(1.5% + 0.03%)
6000 A0.1 A
i40s-EL clamp4 A1 mA±(0.7% + 0.02%)
40 A10 mA
Frequency42.5 Hz to 69 Hz0.01 Hz±(0.1%)2
Auxiliary input±10 V dc0.1 mV±(0.2% + 0.02%)
Voltage min/max1000 V0.1 V±0.2 % of nominal input voltage1
Current min/maxDefined by accessoryDefined by accessory±(5% + 0.2%)
THD on voltage1000%0.10%± 2.5%
THD on current1000%0.10%± 2.5%
Voltage harmonics 2nd to 50th1000 V0.1 V³ 1 V: ±5% of reading
< 1 V: ±0.05V
Current harmonics 2nd to 50thDefined by accessoryDefined by accessory³ 3% of current range: ±5% of reading
< 3% of current range: ±0.15% of range
Flicker PLT, PST0 to 200.015%
Current probe accuracy
ParameterInfluence quantityiFlex1500IP-24iFlex3000IP-24 iFlex6000IP-36i40S-EL
150 A / 1500 A300 A / 3000 A600 A / 6000 A4 A / 40 A
Active Power P PF ³ 0.991.2% + 0.005%1.2% + 0.0075%1.7% + 0.0075%1.2% + 0.005%
Active Energy Ea
Apparent power S0 ² PF ² 11.2% + 0.005%1.2% + 0.0075%1.7% + 0.0075%1.2% + 0.005%
Apparent Energy Eap
Reactive power Q0 ² PF ² 12.5% of measured apparent power
Reactive Energy Er
Power Factor PF-±0.025
Displacement Power
Factor DPF/cos_
Additional uncertainty in% of rangeVP-N>250 V0.015%0.023%0.023%0.015%
1 In the range of 100 V É 500 V; also known as Udin
2 0 ¡C É 45 ¡C: Intrinsic accuracy x 2, outside of 0 ¡C É 45 ¡C: Intrinsic accuracy x 3
3 Consult operators manual for details

Reference conditions:
Environmental: 23 ¡C ± 5 ¡C, instrument operating for at least 30 minutes, no external electrical/magnetic field, RH <65 %
Input conditions: Cos_/PF=1, Sinusoidal signal f=50 Hz/60 Hz, power supply 120 V/230 V ±10 %.
Current and power specifications: Input voltage 1 ph: 120 V/230 V or 3 ph wye/delta: 230 V/400 V
Input current: I > 10 % of I range
Primary conductor of clamps or Rogowski coil in center position
Temperature coefficient: Add 0.1 x specified accuracy for each degree C above 28 ¡C or below 18 ¡C
Electrical Specifications
Power Supply
Voltage range100 V to 500 V using safety plug input when powering from the measurement circuit
100 V to 240 V MA-C8 and using standard power cord (IEC 60320 C7)
Power consumptionMaximum 50 VA (max. 15 VA when powered using MA-C8 adapter)
Efficiency³ 68.2% (in accordance with energy efficiency regulations)
Maximum no-load consumption< 0.3 W only when powered using IEC 60320 input
Mains power frequency50/60 Hz ±15%
BatteryLi-ion 3.7 V, 9.25 Wh, customer-replaceable
On-battery runtimeTypically 4 hours
Charging time< 6 hours
Data Acquisition
Resolution16-bit synchronous sampling
Sampling frequency10.24 kHz at 50/60 Hz, synchronized to mains frequency
Input signal frequency50/60 Hz (42.5 to 69 Hz)
Circuit types1-_, 1-_ IT, split phase, 3-_ delta, 3-_ wye, 3-_wye IT, 3-_ wye balanced, 3-_ Aron/Blondel (2-element delta), 3-_ delta open leg, currents only (load studies)
Data storageInternal flash memory (not user replaceable)
Memory sizeTypical 20 logging sessions of 4 weeks with 1-minute intervals and 500 events
Basic Interval
Measured parametersVoltage, current, aux, frequency, THD V, THD A, power, power factor, fundamental power, DPF, energy
Averaging intervalUser selectable: 1 sec, 5 sec, 10 sec, 30 sec, 1 min, 5 min, 10 min, 15 min, 30 min
Averaging time min/max valuesVoltage, Current: Full cycle RMS updated every half cycle (URMS1/2 according to IEC61000-4-30 Aux, Power: 200ms)
Demand Interval (Energy Meter Mode)
Measured parametersEnergy (Wh, varh, VAh), PF, maximum demand, cost of energy
IntervalUser selectable: 5 min, 10 min, 15 min, 20 min, 30 min, off
Power Quality Measurements
Measured parameterVoltage, frequency, unbalance, voltage harmonics, THD V, current, harmonics, THD A, TDD, voltage interharmonics, TID V, current interharmonics, TID A, Flicker, Mains Signaling, under/over deviation
Averaging interval10 min for all parameters
2 hrs (long term Flicker PLT)
150/180 cycles (3 s) for harmonics (requires software license IEEE519/REPORT)
Individual harmonics2nd to 50th harmonic
Grouping according to IEC 61000-4-7 user configurable depending on application: Sub-grouped (harmonics + interharmonics), grouped or harmonic bins only
Interharmonics1st to the 50th interharmonic
Total harmonic distortionCalculated on 50 voltage harmonics
EventsVoltage: dips, swells, interruptions, current: inrush current
1748: mains signaling, transients (low frequency)
Triggered recordingsRMS profile: Full cycle RMS updated every half cycle of voltage and current up to 11 s (URMS1/2 according to IEC 61000-4-30)
Waveform of voltage and current up to 200 ms, 10/12 cycles
Mains signaling: 10/12 cycle RMS recording of the configured frequencies up to 120s
InrushRMS profile based on 1/2 cycle RMS steady state triggering
FlickerIn accordance with IEC 61000-4-15 and IEEE 1453
Mains signalingTwo user defined frequencies up to 3 kHz
PQ HealthSummarizes power quality measurements in one table. Detailed data available for each parameter
EN 50160Compliance with standard
Programmable PQ limitsEnables user defined limits for local standards compliance
Standards Compliance
HarmonicsIEC 61000-4-7: Class 1
IEEE 519 (short time and very short time harmonics)
Power qualityIEC 61000-4-30 Class A, IEC 62586-1, IEC 62586-2 (PQI-A-PI device)
PowerIEEE 1459
Power quality complianceEN 50160
SafetyGeneral: IEC 61010-1: Pollution Degree 2
Measurement: IEC 61010-2-033: CAT IV 600 V / CAT III 1000 V
Power Supply: Overvoltage Category IV, Pollution Degree 2
Li-ion Battery: IEC 62133
USB-AFile transfer via USB flash drive, firmware updates, max. supply current: 120 mA
Wi-Fi (free with product registration)File transfer and remote control via direct connection or Wi-Fi infrastructure
BluetoothRead auxiliary measurement data from Fluke Connect¨ 3000 series modules (requires supported USB to BLE or Wi-Fi/BLE adapter, check for availability)
USB-miniData download device to PC
Voltage Inputs
Number of inputs4 (3 phases referenced to neutral)
Maximum input voltage1000 Vrms, CF 1.7
Input impedance10 M½
Bandwidth42.5 Hz to 3.5 kHz
Scaling1:1 and variable
Measurement category1000 V CAT III/600 V CAT IV
Current Inputs
Number of inputs4 (3 phases and neutral), mode selected automatically for attached sensor
Input voltageClamp input: 500 mVrms/50 mVrms; CF 2.8
Rogowski coil input: 150 mVrms/15 mVrms at 50 Hz, 180 mVrms/18 mVrms at 60 Hz; CF 4 all at nominal probe range
Range1 A to 150 A/10 A to 1500 A with thin flexible current probe i17XX-flex1500 IP 24
3 A to 300 A/30 A to 3000 A with thin flexible current probe i17XX-flex3000 IP 24
6 A to 600 A/60 A to 6000 A with thin flexible current probe i17XX-flex6000 IP 36
40 mA to 4 A/0.4 A to 40 A with 40 A clamp i40s-EL
Bandwidth42.5 Hz - 3.5 kHz
Scaling1:1 and variable
Auxiliary Inputs
Number of inputs2 (Analog with auxiliary adapter, or up to 2 BLE devices simultaneously)
Input range0 to ± 10 V dc, or 0 to ± 1000 V dc (with optional adapter), 1 reading/s
Scale factorFormat: mx + b (gain and offset) user configurable
Displayed unitsUser configurable (7 characters, for example, ¡C, psi, or m/s)
Wireless Bluetooth connection (check for availability)
Number of inputs2
Supported modulesFluke Connect¨ 3000 series
Acquisition1 reading/s
Environmental Specifications
Operating temperature-25 ¡C to +50 ¡C (-13 ¡F to 122 ¡F)1
Storage temperatureWithout battery: -25 ¡C to +60 ¡C (-13 ¡F to 140 ¡F), with battery: -20 ¡C to +50 ¡C (_4 ¡F to 122 ¡F)
Operating humidityIEC 60721-3-3: 3K6:
-25 ¡C to +30 ¡C (-13 ¡F to +86 ¡F): ² 100 %
40 ¡C (104 ¡F): 55 %
50 ¡C (122 ¡F): 35 %
Operating altitude2000 m (up to 4000 m derate to 1000 V CAT II/600 V CAT III/300 V CAT IV)
Storage altitude12,000 m
EnclosureIEC 60529: IP50
IEC 60529: IP65 with IP65 rated voltage connector
VibrationIEC 60721-3-3 / 3M2
Electromagnetic compatibility (EMC)EN 61326-1: Industrial CISPR 11: Group 1, Class A
IEC 61000-6-5 Power station environment
Korea (KCC): Class A Equipment (industrial broadcasting and communication equipment)
USA (FCC): 47 CFR 15 subpart B. This product is considered an exempt device per clause 15.103
General Specifications
WarrantyTwo-years (battery not included)
Accessories: one-year
Calibration cycle: two-years
Dimensions23.0 cm x 18.0 cm x 5.4 cm (9.1 in x 7.1 in x 2.1 in)
WeightInstrument: 1 kg (2.2 lb)
Tamper protectionAccept securing cables (max. _ 6mm)
1Warm up the product to -10 ¡C (+14 ¡F) before you power the unit on
i17XX-FLEX1.5KIP Flexible Current Probe Specifications
Measuring range1 to 150 A ac/10 to 1500 A ac
Probe cable length610 mm (24 in)
Probe cable diameter7.5 mm (0.3 in)
Weight170 g (0.38 lb)
Minimum bending radius38 mm (1.5 in)
Nondestructive current100 kA (50/60 Hz)
Temperature coefficient over
operating temperature range
0.05 % of reading/¡C (0.028 % of reading/¡F)
Working voltage1000 V CAT III, 600 V CAT IV
Output cable length2.0 m (6.5 ft)
Probe cable materialTPR
Weight115 g
Probe cable materialTPR
Coupling materialPOM + ABS/PC
Output cableTPR/PVC
Operating temperature-20 ¡C to +70 ¡C (-4 ¡F to 158 ¡F) temperature of conductor under test shall not exceed 80 ¡C (176 ¡F)
Temperature, non-operating-40 ¡C to +80 ¡C (-40