Fluke 1744 Three Phase Power Quality Logger

The Fluke 1744 Three-Phase Power Quality Logger captures and analyzes power distribution system behavior across all three phases simultaneously. This Class A instrument logs up to 500 parameters for 85 days, delivering IEC 61000-4-30 compliant measurements of voltage, current, power, harmonics, interharmonics, mains signaling, unbalance, and frequency. Built for field troubleshooting and advanced power quality studies, it detects intermittent faults and hard-to-find disturbances that conventional meters miss.

– Technical Specifications

Measurement Parameters
• Voltage, current, real power (W), apparent power (VA), reactive power (VAR), power factor
• Total Harmonic Distortion (THD) for voltage and current
• Harmonics to the 50th order
• Interharmonics
• Mains signaling
• Voltage unbalance
• Flicker and voltage events
• Frequency measurement

Voltage Measurement
• Range: 88 V to 660 V AC absolute (50 Hz/60 Hz)
• Input (phase-to-neutral): maximum 480 V AC
• Accuracy: 0.1% IEC 61000-4-30 Class A

Current Measurement
• Current probe ranges: 15 A, 150 A, 1500 A, 3000 A AC
• Current transformer input: 0.5 V nominal, 1.4 V peak
• CT ratio support: up to 999 kA / II
• Intrinsic uncertainty: <0.3% of II
• Maximum overload: 10 V AC
• Input impedance: 8.2 kΩ

Analog-to-Digital Conversion
• 16-bit A/D converter at 10.24 kHz sample rate
• FIR anti-aliasing filter, cutoff 4.9 kHz
• Frequency response uncertainty: <1% from 40 Hz to 2500 Hz

System Configuration
• Power systems: Delta, 2-Element Delta, Wye, single phase, split single phase
• Logging intervals: 1, 3, 5, 10, 30 seconds; 1, 5, 10, 15, 60 minutes
• DC voltage functional range: 100 V to 350 V DC
• Mains frequency: 50 Hz / 60 Hz

– Key Features

• Simultaneous logging of up to 500 parameters
• Extended deployment: 85-day logging capability
• Event capture for transient analysis
• Configurable measurement intervals for flexible deployment strategies

– Typical Applications

• Power quality baseline studies and compliance validation
• Intermittent fault diagnosis in distribution systems
• Harmonic analysis and equipment interaction assessment
• Three-phase system unbalance investigation
• Long-term power parameter trending

– Compatibility & Integration

• PQ Log software for logger configuration, data analysis, and report generation