1734 Three-Phase Electrical Energy Logger

Simultaneously log up to two other measurement parameters, virtually any parameter available on a Fluke Connect wireless digital multimeter or module

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$4,439.00 CAD
Normally ships in 4-6 Weeks

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The Fluke 1734 Three Phase Electrical Energy logger delivers easy to use three phase power measurement data for discovering sources of electrical energy waste, overloaded circuits and help you perform routine load studies. Discover when and where energy in your facility is being consumed - from the service entrance to individual circuits. Access and share three phase power data remotely with your team via the Fluke Connect® app so you can maintain safer working distances and make critical decisions in real-time, reducing the need for protective equipment, site visits and check-ins.

Profiling energy usage across your facility helps you identify opportunities for energy savings, and provides you with the data you need to act on them. The new Energy Analyze software package allows you to compare multiple data points over time to build a complete picture of energy usage, which is the first step to reduce the cost of your energy bill.

• Automatically capture and log voltage, current, power, power factor, energy and associated values
• Fluke Connect® compatible, so you can view data locally on the instrument, via Fluke Connect mobile app and desktop software or through your facilities’ WiFi infrastructure
• Power instrument directly from the measured circuit
• The 600 V CAT IV/1000 V CAT III rating (for use at the service entrance and downstream) boosts the highest safety rating in the industry
• Measure all three phases With included 3 flexible current probes
• More than 20 separate logging sessions can be stored on the instruments. In fact, all measured values are automatically logged so you never loose measurement trends. They can even be reviewed during logging sessions and before downloading for real-time analysis
• Optimized user interface
• Quick, guided, graphical setup ensures you’re capturing the right data every time, and the intelligent verification function indicates correct connections have been made, reducing user uncertainty
• Bright, color touch screen allows you to perform convenient in-the-field analysis and data checks with full graphical display
• Capture the right data every time with quick, guided, graphical setup and reduce uncertainty about your connections with the intelligent verification function
• Complete “in-the-field" setup through the front panel or Fluke Connect
• Download and analyze every detail of energy consumption with our automated reporting

Electrical Specifications

Power Supply

Voltage Range

100 V - 500 V using safety plug input when powering from the measurement circuit

100 V - 240 V using standard power cord (IEC 60320 C7)

Power Consumption

Maximum 50 VA (max. 15 VA when powered using IEC 60320 input)


≥ 68.2% (in accordance with energy efficiency regulations)

Maximum No-Load Consumption

< 0.3 W only when powered using IEC 60320 input

Mains Power Frequency

50 Hz / 60 Hz, +/- 15%


Lithium-ion 3.7 V, 9.25 Wh, customer-replaceable

On-Battery Run-time

4 h in standard operating mode, up to 5.5 h in power saving mode

Charging Time

< 6 h

Data Acquisition


16-bit synchronous sampling

Sampling Frequency

10.24 kHz at 50 Hz / 60 Hz, synchronized to mains frequency

Input Signal Frequency

50 Hz / 60 Hz (42.5 Hz - 69 Hz)

Circuit Types

1-φ, 1-φ IT, Split phase, 3-φ delta, 3-φ wye, 3-φ wye IT, 3-φ wye balanced, 3-φ Aron/Blondel (2-element delta), 3-φ delta open leg, Currents only (load studies)

Data Storage

Internal flash memory (not user replaceable)

Memory Size

Typical 10 logging sessions of 8 weeks with 1-minute intervals and 500 events¹

¹The number of possible logging sessions and logging period depends on user requirements.

Basic Interval

Measured Parameters

Voltage, current, aux, frequency, THD V, THD A, power, power factor, fundamental power, DPF, energy

Averaging Interval

1 s, 5 s, 10 s, 30 s, 1 min, 5 min, 10 min, 15 min, 30 min (user-selectable)

Averaging Time Min/Max Values

Voltage, Current: Full cycle RMS updated every half cycle Aux, Power (200 ms)

Demand Interval (Energy Meter Mode)

Measured Parameters

Energy (Wh, varh, VAh), PF, maximum demand, cost of energy


5 min, 10 min, 15 min, 20 min, 30 min, off (user-selectable)

Standards Compliance


IEEE 1459



File transfer via USB flash drive, firmware updates
Max. current: 120 mA


File transfer and remote control via direct connection or WiFi infrastructure


Read auxiliary measurement data from Fluke Connect® 3000 series modules (requires 1734, or 1732 upgrade option)


Data download device to PC

Voltage Inputs

No. of Inputs

4 (3 phases and neutral)

Maximum Input Voltage

1000 Vrms, CF 1.7

Input Impedance

10 MΩ

Bandwidth (-3 dB)

42.5 Hz - 3.5 kHz


1:1 and variable

Measurement Category

1000 V CAT III / 600 V CAT IV

Current Inputs

No. of Inputs

3, mode selected automatically for attached sensor

Input Voltage (Clamp 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


1 A - 150 A / 10 A - 1500 A with thin flexible current probe i17XX-flex1500 12 in

3 A -  300 A / 30 A -  3000 A with thin flexible current probe i17XX-flex3000 24 in

6 A -  600 A / 60 A - 6000 A with thin flexible current probe i17XX-flex6000 36 in

40 mA - 4 A / 0.4 A - 40 A with 40 A clamp i40s-EL

Bandwidth (-3 dB)

42.5 Hz - 3.5 kHz


1:1 and variable

Auxiliary Inputs

No. of Inputs


Input Range

0 to +/-10 V DC, 1 reading/s

Scale Factor

mx + b (gain and offset) user configurable

Displayed Units

User configurable (7 characters, for example, °C, PSI, or m/s)

Wireless Connection

No. of Inputs


Supported Modules

Fluke Connect® 3000 series


1 reading/s

Environmental Specifications



-10°C - 50°C (14°F - 122°F)


-20°C - 60°C (-4°F - 140°F),

-20°C - 50°C (-4°F - 122°F), with battery

Operating humidity

10°C - 30°C (50°F - 86°F) max. 95% RH

30°C - 40°C (86°F - 104°F) max. 75% RH

40°C - 50°C (104°F - 122°F) max. 45% RH



2000 m (up to 4000 m derate to 1000 V CAT II / 600 V CAT III / 300 V CAT IV)




IP50 in accordance with EN60529


MIL-T-28800E, Type 3, Class III, Style B


IEC 61010-1

IEC Mains Input: Overvoltage Category II, Pollution Degree 2

Voltage Terminals: Overvoltage Category IV, Pollution Degree 2

IEC 61010-2-031: CAT IV 600 V / CAT III 1000 V

Electromagnetic Compatibility

EN 61326-1: Industrial CISPR 11: Group 1, Class A

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

Temperature Coefficient

0.1 x accuracy specification/°C

General Specifications

Color LCD Display

4.3 in active matrix TFT, 480 x 272 pixels, resistive touch panel


Instrument and Power Supply

2 years (battery not included)


1 year

Calibration Cycle

Calibration cycle: two-years



19.8 cm x 16.7 cm x 5.5 cm (7.8 in x 6.6 in x 2.2 in)

Power Supply

13.0 cm x 13.0 cm x 4.5 cm (5.1 in x 5.1 in x 1.8 in)

Instrument with Power Supply Attached

19.8 cm x 16.7 cm x 9 cm (7.8 in x 6.6 in x 3.5 in)



1.1 kg (2.5 lb)

Power Supply

400 g (0.9 lb)

Tamper Protection

Kensington lock slot

i17xx-flex 1500 12" Flexible Current Probe Specifications

Measuring Range

1 - 150 A AC / 10 - 1500 A AC

Nondestructive Current

100 kA (50 Hz / 60 Hz)

Intrinsic Error at Reference Condition*

+/- 0.7% of reading

Accuracy 173x + iFlex

+/- (1% of reading + 0.02% of range)

Temperature Coefficient Over Operating Temperature Range

0.05% of reading/°C (0.09% of reading/°F)

Working Voltage

1000 V CAT III, 600 V CAT IV

Probe Cable Length

305 mm (12 in)

Probe Cable Diameter

7.5 mm (0.3 in)

Minimum Bending Radius

38 mm (1.5 in)

Output Cable Length

2 m (6.6 ft)


115 g

Probe Cable Material


Coupling Material


Output Cable




-20°C - 70°C (-4°F - 158°F) temperature of conductor under test shall not exceed 80°C (176°F)


-40°C - 80°C (-40°F - 176°F)

Relative Operating Humidity

15% - 85% non-condensing

IP rating

IEC 60529:IP50


1 year



* Reference condition:

Environmental: 23°C +/- 5°C, no external electrical/magnetic field, RH 65%

Primary conductor in center position



Three-Phase Energy Loggers

Three-Phase Power Loggers


1732 Energy Logger

1734 Energy Logger

1736 Power Logger

1738 Advanced Power Logger

Load Studies

Energy Assessments

Neutral Current Measurement (Four Current Channels)



Harmonics Measurements



Voltage Event Capture



Advanced Analysis: 
Waveform and Inrush Event Capture 
PQ Health (EN51060)



Upgrade package*

IEEE519 Total Harmonic Distortion Measurements





Fully Integrated Logging with Fluke Connect®

Upgrade package*

Upgrade package*



Wi-Fi / Bluetooth



Magnetic Probe Set



Magnetic Hanger



Connection via WiFi Router

Requires FREE software license available upon product registration.

Requires FREE software license available upon product registration.


*Upgrade packages are available to upgrade existing 1732 Energy Loggers with the same features of the 1734 Energy logger, and to upgrade existing 1736 Power Loggers with the same features and capabilities of the 1738 Advanced Power Logger. Please note that 1732 and 1734 Energy Loggers cannot be upgraded with the functionality of 1736 and 1738 Power Loggers.


Connect directly to the 173X Energy or Power Logger, displaying current measurements without error prone scaling factors.
Normally ships in 4-6 Weeks
Starting At
$247.00 CAD
0.1 m test lead for connecting measurement input to Fluke 17XX Power or Energy Loggers
Normally ships in 4-6 Weeks
$55.00 CAD
1.5 m test lead for connecting measurement input to Fluke 17XX Power or Energy Loggers
Normally ships in 4-6 Weeks
$41.00 CAD