Fluke 1745 Three Phase Power Quality Logger

Fluke 1745 Three Phase Power Quality Logger is an advanced IP50 power quality logger with real-time LCD & five hours UPS for technicians who troubleshoot and analyze power quality issues.


Fluke 1745 Three Phase Power Quality Logger can not only measure of voltage and current but it also measures harmonics to the 50th, unbalance, and mains signaling and frequency.

Fluke 1745 Three Phase Power Quality Logger is an advanced IP50 power quality logger with real-time LCD & five hours UPS for technicians who troubleshoot and analyze power quality issues.

Fluke 1745 More than Capable of simultaneously logging up to 500 power parameters for up to 85 days and monitoring for events.
This allows you to analyze power quality in detail and to correlate intermittent events, helping to identify the root cause of disturbances.

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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  • 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
  • 5 hr UPS ride-through
  • LED and LCD Displays
  • Dust/water resistance: IP50
  • 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
2 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 Fluke 1745: Class B2 acc. IEC 60654-1
Fluke 1744/43: Class C2 acc. IEC 60654-1
robust, fully insulated housing and accessories
Protection type
Fluke 1745 IP50 as per EN 60529
Fluke 1744/1743 IP65 as per EN 60529
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
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 Fluke 1745: Internal battery for typ. > 5 hours ride through with intelligent power management
Fluke 1743/44: 3 sec Capacitor
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
Fluke 1745: LC-display with backlight for voltage, current, active power, phase sequence.
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
RS 232, 9600…115 000 Baud, automatic Baud rate selection, 3-wire communication
Fluke 1745 282 mm x 216 mm x 74 mm (115in x 88in x 33in)
Fluke 1743/1744 170 mm x 125 mm x 55 mm (69in x 51in x 22in)
Fluke 1745 approx. 3 kg
Fluke 1744/1743 approx. 2 kg
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


  • 4 Flexible probes 15/150/1500/3000 A with 2 m cable
  • 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


Fluke 1745 Three Phase Power Quality Logger – Catalog    Download


Current Clamps
I1A/10A Clamp PQ4 I1A/10A Clamp PQ4
I5A/50A Clamp PQ4 I5A/50A Clamp PQ4
Rack Mounts Hardware
1743/44 Poleset 1743/44 POLESET Mounting Kit for Fluke 1743/1744
Test Leads
VL1735/45 VL1735/45 Banana 4-Phase voltage lead set for Fluke 1735/45


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