PQM-750
Power quality analyzer

Index cat. WMGBPQM750AC1R1CT5

Ingress protection: IP 30

Measurement category: CAT III 300 V, CAT III 600 V

Data transmission: LAN, RS-485

Display: touchscreen, graphic, color, backlit

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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.

* coming soon

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

* 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.

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

* 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

Parameters

Parameter	Measuring range	Max. resolution	Accuracy
Alternating voltage (TRMS) U_{L-L MAX} = 2000 V for U_{L-E MAX} = 1000 V	0.0…1000.0 V	4 significant digits	±0.1% U_din
Crest Factor
Voltage	1.0…6.5 (1.65 for voltage of 690 V)	0.01	±5%
Current	1.00…10.00	0.01	±5%
Alternating current (TRMS)	0…20 A	4 significant digits	±0.2%
Frequency	40.000…70.000 Hz	0.001 Hz	±0.01 Hz
Active power IEC 62053-22 class 0,2S	depending on voltage and current ratio	4 significant digits	±0.2%
Reactive power IEC 62053-24 class 0,5S	depending on voltage and current ratio	4 significant digits	±0.5%
Apparent power	depending on voltage and current ratio	4 significant digits	±0.2%
Active energy IEC 62053-22 class 0,2S	depending on voltage and current ratio	4 significant digits	±0.2%
Reactive energy IEC 62053-24 class 0,5S	depending on voltage and current ratio	4 significant digits	±0.5%
Apparent energy	depending on voltage and current ratio	4 significant digits	±0.2%
cosφ and power factor (PF)	-1.000…1.000	0.001	0.05
tanφ	-10.000…10.000	0.001	depends on error of active and reactive power
Harmonics and interharmonics
Voltage	DC, 0…256	4 significant digits	±0.05% U_din for m.v. < 1% U_din ±5% m.v. for m.v. ≥ 1% U_din
Current	0…256	4 significant digits	±0.15% I_rin for m.v. < 3% I_rin ±5% m.v. for m.v. ≥ 3% I_rin
THD-F
Voltage	0…20%	0.01%	±0.3% (absolute error)
Current	0…100%	0.01%	±0.3% (absolute error)
Active and reactive power of harmonics	depending on voltage and current ratio	4 significant digits	—
Angle between current and voltage harmonics	-180.0…+180.0°	0.1°	≤0.05° for n = 1 ≤1° for 2 ≤ n ≤ 60 at f_nom = 50 Hz ≤4° for 61 ≤ n ≤ 256 at f_nom = 50 Hz
K-Factor	1.0…50.0	0.01	±10%
Flicker index	0.20…10.00	0.01	±5%
Unbalance factor
Voltage and current	0.0…20.0%	0.1%	±0.15% (absolute error)
Measurement of control signals
Voltage	up to 15% U_din at f_R = 5…30000 Hz	4 significant digits	unspecified for <1% U_din ±0.15% for 1…3% U_din ±5% for 3…15% U_din
Emissions in band
2…9 kHz	a single frequency that is multiple of 200 Hz	0.01 V	±0.1% U_din for m.v. < 2% U_din ±5% m.v. for m.v. ≥ 2% U_din
8…150 kHz	a single frequency that is multiple of 2 kHz	0.01 V	±(5% + 0.1 V)

m.v. – measured value

Weight and dimensions

Parameter	Value
Net weight (kg)	0.6
Package weight (kg)	1
Package width (cm)	28.5
Package height (cm)	10.5
Package length (cm)	18

PQM-750
Power quality analyzer

Description

Technical data

Accessories included

Files to download

Files to download

PQM-750 Power quality analyzer

Description

Technical data

Accessories included

Files to download

PQM-750
Power quality analyzer