Catalog index: WMGBPQM703

Power quality analyzer




Power quality analyzer PQM- 703 is a technically advanced product that allows for comprehensive measurements of  the quality of electricity , analysis and recording of power network parameters, for frequencies 50/60 Hz  in accordance with European standard EN 50160. PQM -703 is another representative of a well, known family of analyzers line PQM- 70x . In relation to the PQM -702 has new functions like recording of transients  with max. sampling frequency 10 MHz  (rapid changes in voltage) and control signals. Minimal transient capturing time is 650 ns. It is intended for a very wide range of users who need to control the quality of power with a mobile device , which fulfills the requirements of a multi-sheet standard IEC 61000 for class A analyzers. This applies to measurement accuracy, measurement methods, and synchronization of time with a standard signal. The last condition is met with a built-in GPS module with an internal antenna. If  the analyzer is installed inside,  it is possible to use an additional antenna with a 10m-long wire. If the antenna is situated outside, GPS signal will be attainable without any problems and used for the synchronization of an internal clock.

In practice, the analyzer may be used with all network types with rated voltage from 110 V to 760 V, directly or indirectly via transducers. It works in the following networks:

  • one-phase,
  • split-phase with N wire,
  • three-phase Wye type, with and without N wire,
  • three-phase delta type,
  • DC voltage.

Thanks to these features PQM -703 can be used in power engineering and maintenance services fields for industrial plants , as well as by persons  providing services in the power network analysis field.

Possible measurements:

  • Measurements according to EN 50160
  • Voltage L1, L2, L3, N-PE
    – average, minimum, maximum and instantaneous values, range to 760V, ability to work with voltage transformers,
  • Current L1, L2, L3, N (four inputs)
    – average, minimum, maximum and instantaneous values, measurement current with range to 3 kA (depends on used clamp), ability to work with current transformers,
  • Crest factor for voltage and current,
  • Frequency from 40Hz to 70Hz ,
  • Active, reactive, distortion, apparent power, including the type of reactive power (capacitive, inductive),
  • Power recording:
    – Budeanu method,
    – IEEE 1459,
  • Active, reactive, apparent energy,
  • Power factor, cosφ, tgφ,
  • K factor (transformer overload caused by the harmonics),
  • Up to 50th harmonics for voltage and current,
  • Total Harmonic Distortion (THD) for voltage and current,
  • Short-term (PST) and long-term (PLT) flicker,
  • Unbalance of voltage and current,
  • Current events detection including waveforms recording,
  • Current and voltage waveforms recording after each averaging period.
  • Mains signalling up to 3000 Hz.
  • Transients up to ±6000 V, minimal transient capturing time is 650 ns.
  • All parameters meet Class A acc. IEC 61000-4-30 standard.

 The device is designed to work with networks:

  • with nominal frequency 50/60Hz,
  • with nominal voltage:
    64/110 V; 110/190 V; 115/200 V; 127/220 V; 220/380 V; 230/400 V; 240/415 V; 254/440 V; 290/500 V; 400/690 V,
  • DC network

Supported networks:

  • single-phase,
  • two-phase with common N conductor,
  • three-phase star connection with and without N conductor,
  • three-phase delta.


Specification Range Resolution Accuracy


0,0…760,0 V 0,01 % Un ±0,1% Un
Voltage 1,00…10,00
(≤1,65 for
voltage 690 V)
0,01 ±5%
Current 1,00…10,00
(≤3,6 Inom)
0,01 ± 5% m.v.
depends on
the clamp*
0,01 % of nominal range ±0,1% of nominal
(add clamps
Frequency 40,00…70,00 Hz 0,01Hz ±0,01 Hz
of configuration
up to 4
decimal places
on configuration
Active, reactive apparent energy depends
of configuration
up to 4
decimal places
the same
as above
and Power
Factor (PF)
0,00…1,00 0,01 ±0,03
tgφ 0,00…10,00 0,01 depends on Active
and Reactive
power accuracy
Harmonics Voltage same as for AC
voltage TRMS
same as for
AC voltage TRMS
±5% Uh
for Uh ≥ 1% Un
±0,05% Un
for Uh < 1% Un
Current same as for AC
current TRMS
same as for
AC current TRMS
± 5% Ih
for Ih ≥ 3% In
± 0,15% In
for Ih < 3% In
Voltage 0,0..100,0% 0,1% ±5%
Current ±5%
depends on configuration
on current
and voltage
minimum value

and current

-180,0…+180,0o 0,1o ±(h x 1o)
K-Factor 1,0…50,0 0,1 ±10%
Flicker 0,20…10,00 0,01 ±5%
Unbalance Voltage and Current 0,0…20,0% 0,1% ±0,15%
(absolute error)
Mains signalling Voltage 5…3000 Hz 0,01 Hz ±0,15% Uh for 1…3% Uh ,5% Un for 3…15% Uh
(max. 10 MHz)
±6000 V 5 V ±(5% + 25 V)

*Clamp F-1/F-2/F-3:0..3000 A (10000 Ap-p) *Clamp C-4: 0..1000 A (3600 Ap-p)*Clamp C-5: 0..1000 A (3600 Ap-p)*Clamp C-6: 0..10 A (36 Ap-p) (without current transformers) *Clamp C-7: 0…100 A (360 Ap-p )

Data Sheet                                      

User Manual                                   

Declarations of conformity          

PSLab 61000-4-30 Class A certificate           

User Manual – Sonel Analysis       

Firmware for PQM-703                  

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