Fluke 1760 Three-Phase Energy Logger

Key features

  • Three-phase power quality recorder fully compliant to IEC 61000-4-30 Class-A and consistent with compliance testing
  • Uses GPS time synchronization to correlate data with events or datasets from other instruments with precision
  • Offers flexible and fully configurable thresholds and scale factors to allow users to define detailed criteria for detecting and recording disturbances

Product overview: Fluke 1760 Three-Phase Energy Logger

Class-A compliance for the most demanding power quality tests

The Fluke 1760 Three-Phase Power Quality Recorder is fully compliant to IEC 61000-4-30 Class-A, for advanced power quality analysis and consistent compliance testing. Designed for analysis of utility and industrial power distribution systems, in medium- and low-voltage networks. The Fluke 1760 provides exceptional flexibility with the ability to customize thresholds, algorithms, and measurement selections. The 1760 power recorder captures the most comprehensive details on user-selected parameters; the supplied PQAnalyze application software enables users uses the in depth measurement and produce sophisticated analysis and reports.


  • Detailed disturbance analysis – Perform high-speed transient analysis and uncover root cause of equipment malfunction for later mitigation and predictive maintenance. The fast transient option, with its 6000 V measurement range, allows capture of very short impulses such as capacitor switching and lightning strikes.
  • Class-A quality-of-service compliance – Validate incoming power quality at the service entrance. Thanks to Class A compliance, the Fluke 1760 allows undisputable verification. The Fluke 1760 Class A compliance has been independently verified at a world leading power quality laboratory.
  • Event correlation at multiple locations – Utilizing GPS time synchronization, users can quickly detect where a fault occurred first, either inside or outside the facility. The accuracy of this time-stamping enables users with multiple 1760s on their network to understand the propagation of events across the network.
  • Galvanic separation and DC coupling – Allows complete measurements on dissimilar power systems. For example troubleshoot UPS systems by simultaneously recording the battery voltage and power output.
  • Power quality and power load studies – Assess baseline power quality to validate compatibility with critical systems before installation and verify electrical system capacity before adding loads.

Other useful features:

  • Provides uninterrupted power supply (40 minutes) so you’ll never miss important events. Even records the beginning and end of interruptions and outages to help determine the cause
  • Provides continuous recording of voltage, current, power P, Q, S, power factor, kWh, flicker, unbalance, frequency, voltage and current harmonics to the 50th/Interharmonics, THD, and mains signaling
  • Provides 2 GB data memory to enable detailed, simultaneous recording of numerous power parameters for long periods of time
  • Includes comprehensive software that provides trend diagrams for root cause analysis, statistical summaries, report writing, and real-time data monitoring in the online mode
  • Allows quick plug and play setup with automatic sensor detection. Sensors are instrument powered, eliminating the need for batteries
  • Delivers reliable testing under nearly any conditions with rugged insulated housing and a solid state design that has no rotating components
  • Comes with four dual-range flexible current probes (1000 A/200 A AC)

Models: Fluke 1760 Three-Phase Energy Logger

Fluke 1760 Three-Phase Power Quality Recorder


  • Input-channels (4 currents/4 voltages or 8 voltages)
  • Internal Flash-memory 2 GB
  • PQ Analyze software on CD-ROM
  • Ethernet cable for network connection (1)
  • Crosslink Ethernet cable for direct PC connection (1)
  • Mains cable (1)
  • Operational manuals
  • Carrying bag
  • Voltage probes, qty 4 (600 V for INTL set, 1000 V for US set)
  • Current probes, qty 4 (Dual-range flexible current probes 1000 A / 200 A AC)
  • GPS time sync receiver

Specifications: Fluke 1760 Three-Phase Energy Logger

Overview of Measurement Functions
Statistical evaluation Power quality statistics according to EN50160 and DISDIP tables like ITIC, CEBEMA, ANSI
Event list Dips, swells and interruptions are detected and stored in the event list. Also any trigger which fires generates an event added to this list.
The Event list shows the exact time when the event occurred as well as the duration and magnitude. Sorting by several attributes of these events is possible to select one for further root cause analysis.
RMS values, transients and fast transients can be stored if a trigger fires
Continuous recording Fluke 1760 records rms values together with corresponding minimum and maximum values for:
• Voltage
• Current
• Power P, Q, S
• Power Factor
• kWh
• Flicker
• Unbalance
• Frequency
• Harmonics/Interharmonics continuously with the following time aggregations: Day, 10 min, Free Interval, e.g.: 15 min, 2 h
Triggered recordings rms Aggregation time is adjustable between 10 ms (1/2 cycle), 20 ms (1 cycle), 200 ms (10/12 cycles) or 3 sec (150/180 cycles).
Calculating rms values, Harmonics and Interharmonics is performed synchronous to the power frequency.
Basic aggregation for harmonics and interharmonics is 200 ms
Sample rate is 10.24 kHz for all 8 channels
Mains signalling Phases and N-conductor, Voltage and current
Online mode Variable refresh rate. This feature allows verification of instrument set up and delivers a quick overview of oscilloscope, transients and events.
General Data
Intrinsic uncertainty refers to reference conditions and is guaranteed for two years
Quality system developed, manufactured as per ISO 9001: 2000
Environment conditions Operating temp. range 0°C to +50°C; 32°F to +122°F
Working temp. range -20°C to +50°C; -4°F to +122°F
Storage temp. range 20°C to +60°C; -4°F to 140°F
Reference temperature 23°C ±2 K; 74°F ±2 K
Climatic class B2 (IEC 654-1), -20°C to +50°C; -4°F to +122°F
Max. operating altitude 2000 m: max. 600 V CAT IV1
power supply: 300 V CAT III 5000 m: max 600 V CAT III1
power supply: 300 V CAT II
1. Depending on sensor
Reference conditions Environment temperature 23°C ±2 K ; 74°F ±2 K
Power supply 230 V ±10%
Power frequency 50 Hz / 60 Hz
Signal declared input voltage Udin
Averaging 10 minute intervals
Housing Insulated, robust plastics housing
EMC Emission Class-A as per IEC/EN 61326-1
Immunity IEC/EN 61326-1
Power supply Range AC: 83 V to 264 V, 45 to 65 Hz
DC: 100 V to 375 V
Safety IEC/EN 61010-1 2nd edition
Power consumption NIMH, 7.2 V, 2.7 Ah
Battery pack In case of a power supply failure an internal battery maintains the supply for up to 40 minutes. Afterwards, or in case of discharged accumulators the Fluke 1760 is turned off and continues the measurements with the latest settings as soon as the supply voltage returns. The battery can be replaced by the user.
Display Fluke 1760 features LED indicators for the status of the 8 channels, phase sequence, power supply (mains or accumulator), memory usage, time synchronization, and data transfer.
Power LED Permanent light: normal power supply from mains.
OFF: supply via internal accumulator in case of a power failure.
Channel LEDs 3-color LEDs per channel for Overload condition
Under load condition
Data memory 2 GB Flash memory
Memory model Linear
Interfaces Ethernet (100 MB/s), compatible to Windows® XP, 7 and 8, RS 232, external modem via RS 232
Baud rate for RS 232 9600 Baud to 115 kBaud
Dimensions (H x W x D) 325 x 300 x 65 mm; 2.8 x 11.8 x 2.6 in
Weight appr. 4.9 kg; 10.8 lbs (without accessories)
Warranty 2 years
Calibration interval 1 year recommended for Class-A, otherwise 2 years
Signal Conditioning
Range for 50 Hz systems 50 Hz ±15% (42.5 Hz to 57.5 Hz)
Range for 60 Hz systems 60 Hz ±15% (51 Hz to 69 Hz)
Resolution 16 ppm
Sampling frequency for 50 Hz power frequency 10.24 kHz, The sampling rate is synchronized to mains frequency.
Uncertainty for frequency measurements < 20 ppm
Uncertainty of internal clock < 1 s / day
Measurement intervals Aggregation of the interval values as per IEC 61000-4-30 Class-A
Min-, Max-values Half cycle, e.g.: 10 ms rms values at 50Hz
Transients Sample rate 100 kHz to 10 MHz per channel
Harmonics as per IEC 61000-4-7:2002: 200 ms
Flicker as per EN 61000-4-15:2003: 10 min (Pst), 2 h (Plt)
Measurement Inputs
Number of inputs 8 galvanically isolated inputs for voltage and current measurements.
Sensor safety up to 600 V CAT IV depending on sensor
Basic safety 300 V CAT III
Nominal voltage (rms) 100 mV
Range (peak value) 280 mV
Overload capacity (rms) 1000 V, continuously
Voltage rise rate max. 15 kV / µs
Input resistance 1 MΩ
Input capacitance 5 pF
Input filter Each channel is equipped with a passive low-pass filter, an anti-aliasing filter and a 16-bit A/D converter. All channels are sampled synchronously with a common quartz-controlled clock pulse.
The filters protect against voltage transients and limit the signal rise rate, reduce high frequency components and especially the noise voltage above half the sampling rate of the A/D converter by 80 dB, thus achieving very small measuring errors in an exceptionally large amplitude range. This is also valid under extreme operating conditions like transient voltages at the output of converters.
Uncertainty at reference conditions Uncertainty including the voltage sensors is in compliance with IEC 61000-4-30 Class-A. All voltage sensors are suitable for DC up to 5 kHz
With Sensor 1000 V 0,1% at Udin = 480 V and 600 V P-N
Sensor 600 V 0,1% at Udin = 230 V P-N
Intrinsic uncertainty for harmonics Class I as per EN 61000-4-7:2002
Reference conditions 23°C ±2 K < 60% rH; 74°F ±2 K < 60% rH
Warmed up instrument > 3h
Power supply: 100 V to 250 V AC
Temperature drift 100 ppm / K
Aging < 0.05% / year
Common mode rejection > 100 dB at 50 Hz
Temperature drift Change of amplification through temperature: < 0.005%/K
Aging Change of amplification due to ageing: < 0.04%/year
Noise Noise voltage, input short-circuited: < 40 µV
DC ±(0.2% rdg + 0.1% sensor)