Fluke 1745 Basic Power Quality Logger

Disturbance Analyzers – Fluke 1745 three-phase power quality logger is capable of logging up to 500 power parameters for up to 85 days.





Power quality logging is easy with a compact and rugged Fluke power meter

The Fluke 1745 Three-phase Power Quality Logger is an everyday power meter for technicians who troubleshoot and analyze power quality issues. Capable of simultaneously logging up to 500 power parameters for up to 85 days and monitoring for events, these power loggers help 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.


  • 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: Setup in minutes with automatic 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

Loggers for every application

The portable Fluke 1745 Power Quality Logger is designed for easy installation and use, anywhere in low- and medium-voltage applications.

The advanced IP50 power quality logger has the same measurement capability as the 1744, plus real-time LCD, five hour UPS.


  • 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: IP50
  • LED and LCD Displays
  • 5 hr UPS ride-through
  • Dimensions (H x W x D): 282 x 216 x 74 mm (11.5 x 8.8 x 3 in.)


General Data
Intrinsic error Refers to the reference conditions and is guaranteed for two years
Recalibration interval 2 years recommended
Quality system developed, designed, and manufactured according to DIN ISO 9001
Reference conditions 23°C ±2 K; 74°F ±2 K , Vm = 230 V ±10%, 50 Hz ±0.1 Hz or 60 Hz ±0.1 Hz
Phase sequence L1, L2, L3
Interval length 10 minutes
Wye connection (L1, L2, L3 to N)
Power supply 88 V … 265 V AC
Environment conditions Working temp. range -10°C to 55°C; 14°F to 131°F
Operating temp. range 0°C to 35°C; 32°F to 95°F
Storage temp. range -20°C to 60°C; -4°F to 140°F
Reference temp. range 23°C ±2 K; 74°F ±2 K
Relative humidity Class B2 acc. IEC 60654-1
Housing robust, fully insulated housing and accessories
Protection type IP50 as per EN 60529
Safety IEC/EN 61010-1 600 V CAT III, 300 V CAT IV, pollution degree 2, double insulation
Type test voltage 5.2 kV rms, 50 Hz / 60 Hz, 5 s
EMC Emission IEC/EN 61326-1, EN55022
Immunity IEC/EN 61326-1
Voltage and Current Measurement
Input voltage Input range VI P-N max 480 V AC
Input range VI P-P max 830 V AC
Max. overload voltage 1.2 VI
Input range selection By job programming
Connections P-P or P-N, 1- or 3-phase
Nominal voltage VN ≤ 999 kV with PTs and ratio
Input resistance App. 820 kΩ per chan. Lx-N Single phase (L1 or A, L2 or B, L3 or C connected): app. 300 kΩ
Intrinsic uncenrtainty 0.1% of VI
Voltage transformer Ratio: < 999 kV / VI
Ration selection By job programming
Current input with flexi set Input ranges II L1 or A, L2 or B, L3 or C, N 15 A / 150 A / 1500 A / 3000 A AC
Measuring range 0.75 A … 3000 A AC
Intrinsic uncertainty < 2% of II
Position influence Max. ±2% of measured value – for distance conductor to meas. head > 30 mm
Stray field influence < ±2 A AC for Iext=500 A AC and distance to measuring head > 200 mm
Temperature coefficient < 0.05% / K
Current transformer Ratio ≤ 999 kA / II
Ratio selection By job programming
Connection 3-phase, 3-phase +N, 2 phase L1 or A and L3 or C (2 W-meter-method) 7 pole connector
Current input for clamp Input ranges II L1 or A,
L2 or B, L3 or C, N
0.5 V nominal (for II) 1.4 Vpeak
Intrinsic uncertainty < 0.3% of II
Max. overload 10 V AC
Input resistance App. 8.2 kΩ
Current transformer Ratio Ω 999 kA / II
Power systems Delta, 2-Element Delta, Wye, Single Phase, Split Single Phase
Power supply Functional Range 88 V to 660 V absolute, 50 Hz / 60 Hz
100 V to 350 V DC Internal fuse: 630 mA T
Power consumption 5 Watts
Ride through Internal battery for typ. > 5 hours ride through with intelligent power management
Fuse Power supply fuse can be replaced in service facility only. Supply can be connected in parallel to measuring inputs (up to 660 V)
Display, indicators LEDs for status and voltage levels
LC-display with backlight for voltage, current, active power, phase sequence.
Memory Capacity 8 MB Flash-EPROM
Intervals A function > 12000 intervals for > 85 days with 10 min intervals
P function > 30000 intervals for > 212 days with 10 min intervals
Events > 13000
Memory model linear, circular
Interface RS 232, 9600…115 000 Baud, automatic Baud rate selection, 3-wire communication
Dimensions 282 x 216 x 74 mm (115 x 88 x 33 in)
Weight approx. 3 kg
Measurement A/D converter 16 bit, sample rate: 10.24 kHz
Anti-aliasing filter FIR-Filter, fc = 4.9 kHz
Frequency response Uncertainty < 1% of Vm for 40 Hz to 2500 Hz
Interval length 1, 3, 5, 10, 30 s, 1, 5, 10, 15, 60 minutes
Averaging time for Min/max values ½, 1 mains period, 200 ms, 1, 3, 5 s
Time base Resolution: 10 ms (at 50 Hz), deviation: 2s/day at 23°C; 74°F ±2 K


Models (1)
Model Name Description
Fluke 1745 Basic Fluke 1745 Basic Power Quality Logger

  • Power Quality Logger Memobox
  • CD-ROM with PQ Log software
  • RS232 interface cable and RS232-USB adapter
  • Test leads for voltages and power supply
  • 4 black dolphin clips
  • Color localization kit
  • Carrying bag
  • Test certificate with measurement values
  • Printed English manual
  • Multi-language manual CD


Current Clamps (9)
Model Name Description
Fluke 3000A/6000A Fluke 3000A/6000A 36-Inch Flexi ProbeTM 4 Phase
Fluke I1A/10A Clamp PQ1 Fluke I1A/10A 1 Phase Mini Current Clamp Set for Power Quality
I1A/10A Clamp PQ3 Fluke I1A/10A Clamp PQ3 3-Phase 1A/10A
I1A/10A Clamp PQ4 Fluke I1A/10A Clamp PQ4
Fluke I20A/200A Fluke I20A/200A Clamp PQ3
Fluke I20A/200A Fluke I20A/200A Clamp PQ4
I5A/50A Clamp PQ1 Fluke I5A/50A Clamp PQ1
I5A/50A Fluke I5A/50A Clamp PQ3
Fluke I5A/50A Fluke I5A/50A Clamp PQ4



1745 Users Manual Download
1745 Users Manual Supplement Download
PQ Log Users Manual Download
1743, 1744, 1745 Statement of Memory Volatility Download
1A/10A Instruction Sheet Download
20A/200A Instruction Sheet Download
3000A/6000A Flex 4 Instruction Sheet Download
3000A/6000A Flex 4 Instruction Sheet Supplement Download
5A/50A Instruction Sheet Download
FS17XX/FS17XX IP65 Instruction Sheet Download
FS17XX/FS17XX IP65 Instruction Sheet Supplement Download
Application Notes (1)
Power quality recording and analysis: techniques and applications Download
Data Sheets (3)
Fluke 1A/10A Current Clamp Data Sheet Download
Fluke 20A/200A Clamp Set Data Sheet Download
Fluke 5A/50A Current Clamp Data Sheet Download

About us

บริษัท เมสเชอร์เมนท์เอเชีย จำกัด
Measurementasia Co.,Ltd.

99 Moo. 3, Khlong 5, Khlong Luang,
Pathumthani 12120



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