Description

Sonel PQM-750 fixed permanent power quality meter

The Sonel PQM-750 is a permanent sub meter designed to measure and record power supply parameters for compliance with standards and applicable laws, and with the ability to verify preset terms of a DNO connection agreement.

Made in class A. Designed to be mounted on a DIN rail (with the possibility of mounting on a wall in a cabinet). Modular design allows adding new modules to expand the capabilities of the meter. The instrument allows measurements in 50 Hz, 60 Hz and 400 Hz networks.

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 current transformers 5 A (optional: 1 A*), possibility of indirect measurements with calculation results for the primary side (optional: version with external current transformers*)
  • Operation in 50 Hz, 60 Hz networks, operation in 400 Hz networks
  • Recording of voltage and current events along with waveforms
  • 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)
  • Power supply 85…264 V AC (120…300 V DC), built-in rechargeable battery
  • 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
  • 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

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.

Additional internal modules

  • Transient module
  • SSR relay module
  • 18…60 V DC power supply unit

Additional external modules

  • LTE GSM module
  • GPS module with IRIG-B output
  • I/O module
  • LCD 7” touch panel for full operation of the analyzer at the mounting location

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 P3F, Q3F, S3F
  • Three-phase total power P13F, Q13F, S13F
  • cosφ for L1, L2, L3, cosφ3F
  • Power factor PF for L1, L2, L3, PF3F
  • tgφ for L1, L2, L3, tgφ3F
  • Distortion power D for L1, L2, L3
  • Three-phase total distortion power D3F
  • 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 EP+ or given EP-
  • Three-phase active energy – drawn EP3F+ or given EP3F-
  • Inductive reactive energy for L1, L2, L3 for consumption – EQL+
  • Capacitive reactive energy for L1, L2, L3 for consumption – EQC+
  • Three-phase reactive energy for consumption – inductive EQL3F+ and capacitive EQC3F+
  • Apparent energy for L1, L2, L3 – ES
  • Three-phase apparent energy ES3F
  • Harmonics hn to 256th in current and voltage
  • Interharmonics up to 256th in current and voltage
  • Angles between current and voltage harmonics
  • Monitoring of 2…150 kHz bandwidth
  • UDC phase voltage components
  • Shares of harmonic currents and voltages in relation to RMS value (%) – hnR
  • Shares of harmonic currents and voltages in relation to the fundamental harmonic h1 (%) – hnF
  • THDR for voltages and currents calculated against RMS value (%)
  • THDF for voltages and currents calculated relative to the fundamental harmonic (%)
  • TIDR for voltages and currents calculated against RMS value (%)
  • TIDF for voltages and currents calculated relative to the fundamental harmonic (%)
  • Active and reactive harmonic powers
  • K-factor for I1, I2, I3, IN
  • 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 Pst
  • Long-term light flicker factor Plt
  • 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