PQM-750

Power quality analyzer (version AC1-R1-CT5)

Features

• Full class A according to IEC 61000-4-30, confirmed by a certificate from an accredited laboratory
• Voltage inputs L1, L2, L3, N, E (5 terminals)
• L1, L2, L3, N, E currents (5 current transformers)
• Built-in 5 A or 1 A current transducers, or a variant without transducers, but cooperating with external transducers*
• Possibility of indirect measurements with calculation results for the primary side
• Operation in 50 Hz, 60 Hz, 400 Hz networks
• Recording of voltage and current events along with waveforms
• Design with or without transient measurement module
• Measurement of more than 4,000 parameters
• 24-bit analog-to-digital converter
• Basic sampling rate of 80 kHz
• Conducted emissions monitoring in the 2…150 kHz band
• Two LAN ports, including one with the option of powering the meter with PoE (Power over Ethernet)
• Built-in rechargeable battery
• Two mains power supply options: built-in power supply unit 85…264 V AC (120…300 V DC) or 18…60 V DC
• 8 GB memory (microSD card)
• USB port for meter updates and data exchange
• Two binary inputs, two relay outputs, two RS-485 ports
• Relay output to monitoring analyzer operation (Watchdog)
• 1-wire input for external temperature sensors
• 2.4” touch screen
• DIN rail or wall mounting
• Expansion bus allowing connection of various external modules (e.g. GPS, LTE)
• Built-in web server for programming the meter, reading current data, viewing the list of recorded events with oscillogram/RMS display
• Time synchronization with the reference via NTP servers, IRIG-B (via built-in RS-485)
• Optional GPS module and antennas
• Measurement category CAT III 600 V (IV 300 V) for voltage inputs
• Measurement category CAT III 300 V for current inputs
• Possibility of sealing current and voltage inputs

* coming soon

Additional features

Standard transmission protocols

• Modbus TCP/IP
• Modbus RTU
• IEC 61850
• PQdif

Web interface (webserver)

• Access to the interface from any web browser

Modularity

The instrument can be expanded with additional communication protocols and physical and software functionality.

• GPS module with IRIG-B output and GPS module antenna (10 m / 20 m / 30 m)
• LTE GSM module*
• I/O module*
• LCD 7” touch panel for full operation of the analyzer at the mounting location*

* coming soon

Measured parameters

Built-in software (web interface – webserver) allows you to configure the device and view actual data. It allows measurement of the following parameters.

• Phase RMS voltage U for L1, L2, L3+N/PE
• Phase-to-phase RMS voltages U for L12, L23, L31
• RMS currents I of all phases + N + PE
• Crest factor CF of voltages and currents
• Network frequency f for L1
• Active power P for L1, L2, L3
• Active power P1 (separated 50 Hz) for L1, L2, L3
• Reactive power Q for L1, L2, L3
• Reactive power Q1 (separated 50 Hz) for L1, L2, L3
• Apparent power S for L1, L2, L3
• Apparent power S1 (separated 50 Hz) for L1, L2, L3
• Three-phase total power P_3F, Q_3F, S_3F
• Three-phase total power P1_3F, Q1_3F, S1_3F
• cosφ for L1, L2, L3, cosφ_3F
• Power factor PF for L1, L2, L3, PF_3F
• tgφ for L1, L2, L3, tgφ_3F
• Distortion power D for L1, L2, L3
• Three-phase total distortion power D_3F
• Distortion power factor DPF for L1, L2, L3
• Shape of phase voltages and currents for events
• Phase diagrams for currents and voltages
• Active energy for L1, L2, L3 – taken E_P+ or given E_P-.
• Three-phase active energy – drawn E_P3F+ or given E_P3F-
• Inductive reactive energy for L1, L2, L3 for consumption – E_QL+
• Capacitive reactive energy for L1, L2, L3 for consumption – E_QC+
• Three-phase reactive energy for consumption – inductive E_QL3F+ and capacitive E_QC3F+
• Apparent energy for L1, L2, L3 – E_S
• Three-phase apparent energy E_S3F
• Harmonics h_n to 256^th in current and voltage
• Interharmonics up to 256th in current and voltage
• Angles between current and voltage harmonics
• Monitoring of 2…150 kHz bandwidth
• U_DC phase voltage components
• Shares of harmonic currents and voltages in relation to RMS value (%) – h_nR
• Shares of harmonic currents and voltages in relation to the fundamental harmonic h1 (%) – h_nF
• THD_R for voltages and currents calculated against RMS value (%)
• THD_F for voltages and currents calculated relative to the fundamental harmonic (%)
• TID_R for voltages and currents calculated against RMS value (%)
• TID_F for voltages and currents calculated relative to the fundamental harmonic (%)
• Active and reactive harmonic powers
• K-factor for I₁, I₂, I₃, I_N
• Factor K (Europe)
• Symmetrical voltage components: zero U₀, direct U₁, inverse U₂
• Voltage values (V, %) of harmonic components of the order compatible (1, 4, 7,…), opposite (2, 5, 8,…), zero (3, 6, 9,…)
• Symmetrical components of current: zero I₀, direct I₁, inverse I₂
• Values of currents (A, %) of harmonic components of the order direct (1, 4, 7,…), inverse (2, 5, 8,…), zero (3, 6, 9,…)
• Short-term light flicker factor P_st
• Long-term light flicker factor P_lt
• Voltage unbalance
• Current unbalance
• Transients U up to 6000 V
• Ripple control signals
• Temperatures: Tw (analyzer internals), Tz1…Tz4 (1-wire)

Standards

Made in class A of the IEC 61000-4-30 standard, the instrument is compliant:

• Product standards:
  • IEC 62586-1 – Power quality measurement in power supply systems – Part 1: Power quality instruments (PQI)
  • IEC 62586-2 – Power quality measurement in power supply systems – Part 2: Functional tests and uncertainty requirements
• Standards for measuring network parameters:
  • IEC 61000-4-30 – Electromagnetic compatibility (EMC) – Testing and measurement techniques – Power quality measurement methods
  • IEC 61000-4-7 – Electromagnetic compatibility (EMC) – Testing and Measurement Techniques – General Guide on Harmonics and Interharmonics Measurements and Instrumentation for Power Supply Systems and Equipment Connected thereto
  • IEC 61000-4-15 – Electromagnetic compatibility (EMC) – Testing and Measurement Techniques – Flickermeter – Functional and Design Specifications
  • EN 50160 – Voltage characteristics of electricity supplied by public electricity networks
• Safety standards:
  • IEC 61010-1 – Safety requirements for electrical equipment for measurement control and laboratory use. Part 1: General requirements
  • IEC 61010-2-030 – Safety requirements for electrical equipment for measurement, control, and laboratory use – Part 2-030: Particular requirements for equipment having testing or measuring circuits
• Standards for electromagnetic compatibility:
  • EN 55032 – Electromagnetic compatibility of multimedia equipment – Emission Requirements
  • IEC 61000-6-5 – Electromagnetic compatibility (EMC) – Part 6-5: Generic standards – Immunity for equipment used in power station and substation environment