Stationary, modular, comprehensive
Stationary 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 power sale/purchase contract.
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.
The PQM-750 can be configured in various ways. Each set of built-in internal modules is a separate sales index for the analyzer. Need help choosing a configuration? Contact our Customer Service.
 
 
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