Fluke 1777 Three-Phase Power Quality Analyzer

The Fluke 1777 Power Quality Analyzer is a reliable tool for analyzing power quality issues. It comes with an easy-to-use interface, automatic measurements, and a simplified reporting platform for fast and efficient power quality studies.


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Fluke 1777 Three-Phase Power Quality Analyzer

The Fluke 1777 Three-Phase Power Quality Analyzer is a state-of-the-art instrument designed to simplify power quality logging, troubleshooting, and analysis. It is engineered to be a faster and easier way to perform power quality studies, offering automatic measurements, a straightforward user interface and setup, best-in-class specifications, and a simplified reporting platform. This article will provide an in-depth overview of the Fluke 1777, discussing its key features, applications, and benefits.

Key Features

The Fluke 1777 offers a range of features that make it a versatile and reliable tool for power quality analysis. Some of its key features include:

  • Automatic measurement capture system: This unique feature helps ensure that users are collecting the right data every time, with the flexibility to select and adjust specific parameters as needed.
  • Capture high-speed transients up to 8 kV: The Fluke 1777 can detect and analyze fast transients, which can be crucial for identifying equipment failures and maintaining the overall health of an electrical system.
  • Power directly from the measurement circuit: This eliminates the need to find a power outlet or use a lengthy extension cord, providing users with greater flexibility and convenience.
  • Best-in-class accuracy: The Fluke 1777 offers the accuracy that users have come to expect from a Fluke Power Quality Analyzer, with future compliance to IEC 61000-4-30 Class A edition 4, EN 50160, and IEEE 519 standards.
  • Easy-to-use interface and setup: The Fluke 1777 features a straightforward user interface and setup, making it accessible to both experienced professionals and those new to power quality analysis.


The Fluke 1777 is suitable for a wide range of applications, including:

The Fluke 1777 analyzer is a powerful tool that can be used to perform basic and advanced power quality studies on electrical systems. It provides an overview of the overall health of an electrical system by measuring fundamental power quality variables.

In addition to basic power studies, users can leverage the Fluke 1777’s capabilities to perform more in-depth power quality analysis such as harmonic surveys and load testing. This can help identify potential issues and areas for improvement.

The Fluke 1777 can also be used to conduct energy surveys, making it a valuable tool for energy audits and efficiency projects. By analyzing power quality data, users can identify patterns of energy consumption and take appropriate corrective actions.

If you are experiencing nuisance circuit breaker tripping, the Fluke 1777 can help you identify the root cause of the issue and take corrective actions.

This analyzer is also suitable for conducting power quality surveys in utility settings, helping to ensure the reliability and stability of the power grid.

Finally, the Fluke 1777 can be used to capture and analyze high-speed transients, which can help identify and resolve equipment failures.


The Fluke 1777 is a reliable and accurate tool for data capture, ensuring that users collect precise data for their power quality studies. It has an automatic measurement capture system and best-in-class accuracy. It is also convenient and easy to use with a straightforward user interface and can power directly from the measurement circuit. The Fluke 1777 is versatile and adaptable, suitable for basic power studies to advanced power quality analysis, making it a valuable tool for electrical professionals.

Its future-proof design meets the future requirements of Class A edition 4, EN 50160, and IEEE 519 standards, ensuring users are ready to tackle tomorrow’s measurement requirements, today. Additionally, the Fluke 1777 comes with Fluke Energy Analyze Plus software, which allows users to create customized reports or leverage built-in one-click reporting to industry standards like EN 50160, IEEE 519, and GOST 33073.

Fluke 1777 Three-Phase Power Quality Analyzer Specifications:

Power quality measurement

  • Harmonics:
    • h0 … h50 % fund and RMS for voltage, current and power
    • Phase angles for voltage and current up to h11
    • Interharmonics: ih0… ih50 % fund and RMS for voltage and current
  • Supraharmonics:
    • 2–9 kHz with 200 Hz bins
    • 9–30 khz with 2 kHz bins
    • RMS for voltage and current
  • Harmonics measurement method:
    • Grouped, sub-grouped and single harmonic bins according to IEC 61000-4-7.
    • Method selected automatically based on configured PQ standard or user-configurable.
  • Total harmonic distortion: Calculated on up to 50 harmonics (depends on selected PQ standard)
  • Mains signaling: 2 frequencies in the range from 110 Hz to 3000 Hz
  • Triggered recordings:
    • Half-cycle RMS of voltage and current for 10 s
    • The waveform of voltage and current for 10/12 cycles
    • Mains signaling: 200 ms RMS of mains signaling voltage up to 120 s
  • Transients: Waveform of voltage (1 MS/s or 20 MS/s, 500,000 pts)

Electrical measurement accuracy

ParameterRangeResolutionIntrinsic Accuracy at Reference Conditions % of Reading + % of Full Scale
Voltage1000 V0.1 V0.1 % of nominal voltage in accordance with IEC 61000-4-30 Class A ±(0.04 % + 0.004 %)
Voltage dips and swells0.1 V0.2 % of Vnom
Voltage transients±8 kVpk±5 % +0.25 %
Voltage harmonics/interharmonics100%0.1 % / 0.1 mV≥1 % Vnom1: ±2.5 % of rdg., <1 % Vnom: ±0.025 Vnom
THD on voltage100%0.1 % / 0.1 V±(2.5 % + 0.5 %)
Voltage distortions 2-9 kHzMax 100 V0.1 mV±(2.5 % + 0.1 V)
Voltage distortions 9-30 kHzMax 100 V0.1 mV±(2.5 % + 0.1 V)
Current (Rogowski clamp mode)With iFlex 1500 A,150 A0.01%±(1 % + 0.02 %)
i17XX-FLEX1500 241500 A0.1 A
With iFlex 3000 A,300 A0.01 A±(1 % + 0.03 %)
i17XX-FLEX3000 243000 A0.1 A
With iFlex 6000 A,600 A0.1 A±(1.5 % + 0.03 %)
i17XX-FLEX6000 366000 A0.04
With AC clamp 40 A,0.170.001 A±(0.7 % + 0.02 %)
i40s-EL40 A0.01 A
With AC clamp 400 A,40 A0.01 A±(2 % + 0.2 %)
i400s-EL400 A0.1 A ±(0.7 % + 0.1 %)
With AC/DC clamp200 A0.01 A±(0.8 % + 0.2 %)
2000 A, 80i-2010s-EL2000 A0.1 A
Current min/max100%defined by accessoryx2 of intrinsic accuracy
Current harmonics/interharmonics100%0.1 % / 0.01 A≥3 % Inom: ±2.5 % of rdg., <3 % Inom: ±0.15 % of Inom
THD on current100%0.10%±(2.5 % + 0.5 %)
Frequency42.5 Hz … 69 Hz0.001 Hz±0.01 Hz
Voltage unbalance100%0.10%±0.15 %
Current unbalance100%0.10%±0.15 %
Flicker Pinst, Pst, Plt0 to 200.015%
Mains signaling voltageUp to 3 kHz0.1 V / 0.1 %1-3 % Vnom: ±0.15 % of Vnom, 3-15 % Vnom: ±5 % of rdg.
0-15 % of Vnom
AUX input±10 V0.1 mV±(0.2 % + 0.05 %)


ParameterDirect Input1Clamp i40S-EL
Power range W, VA, varClamp: 50 mV / 500 mV4 A / 40 A
Rogowski: 15 mV / 150 mV
Clamp: 50 W / 500 W4k W / 40 kW
Rogowski: 15 W / 150 W
Max. resolution W, VA, var0.1 W1 W / 10 W
Phase (voltage to current)±0.2°±1°


Calibration cycle2 years
Size (L X W X HD)28.0 cm x 19.0 cm x 6.2 cm (11.0 in x 7.5 in x 2.4 in)
Weight2.1 kg (4.6 lb)
Anti-theft protectionSlot to support Kensington lock


Operating temperature range-10 °C to 50 °C
Storage temperature range-20 °C to 60 °C
Operating humidityIEC 60721-3-3: 3K5, modified:
-10 °C to 30 °C: ≤95 %, no condensation or ice
35 °C: 70 %
40 °C: 55 %
50 °C: 35 %
IP RatingIEC 60529: IP50
VibrationIEC 60721-3-3 / 3M2

Power supply

  • Voltage range: 100 V – 600 V -15 % / +10 % (85 V … 660 V)
  • Power consumption: Max. 40 VA
  • Mains frequency: 50/60 Hz (42.5 Hz … 69 Hz)


GeneralIEC 61010-1: Pollution Degree 2
Power supplyOvervoltage Category IV 600 V With Mains Adapter MA-C8: Overvoltage Category II 300 V
MeasurementIEC 61010-2-030: CAT IV 600 V, CAT III 1000 V
Altitudes 2000 m to 4000 mDerate to: Power Supply: Category IV 300 V With MA-C8 Adapter: Category II 150 V Measurement: CAT IV 300 V, CAT III 600 V, CAT II 1000 V


  • Data storage: 32 GB microSD card (installed)
  • Memory size:
    • Typical 10 logging sessions of 8 weeks with 1-minute intervals and 100 events.
    • The number of possible logging sessions and logging period depends on user requirements
  • Real-time accuracy:
    • Internal: 3 ppm (0.26 s per day, 8 s per month)
    • NTP (internet time): Depending on internet latency, typical < 0.1 s absolute to UTC
    • GPS: < 1 ms absolute to UTC
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Fluke Corporation Since its founding in 1948, Fluke has helped define and grow a unique technology market, providing testing and troubleshooting capabilities that have grown to mission critical status in manufacturing and service industries. Every new manufacturing plant, office, hospital, or facility built today represents another potential customer for Fluke products. From industrial electronic installation, maintenance and service, to precision measurement and quality control, Fluke tools help keep business and industry around the globe up and running. Typical customers and users include technicians, engineers, metrologists, medical-device manufacturers, and computer network professionals — people who stake their reputations on their tools, and use tools to help extend their personal power and abilities.





power quality analyzer
AC C range/resolution/accuracy

Depends on probe

AC V range/resolution/accuracy

1000 V, 0.1 V, ±(0.04 % + 0.004 %)

Frequenc range/resolution/accuracy

42.5 Hz … 69 Hz, 0.001 Hz, ±0.01 Hz

Phase rotation:


Mechanical and General Specifications

28.0 cm x 19.0 cm x 6.2 cm (11.0 in x 7.5 in x 2.4 in)


2.1 kg (4.6 lb)

IP rating



Power consumption: Max. 40 VA, Voltage range: 100 V – 600 V -15 % / +10 % (85 V … 660 V)

Operating temperature

-10 °C to 50 °C

Storage temperature

-20 °C to 60 °C

Operating altitude

2000 m to 4000 m


2 years

Measurement Unit

User configurable (up to 8 characters)