Power Quality Analyzer PQM-703 / PQM-702

Advanced Electrical Test & Measurement Technology

Possible measurements:
· Measurements according to EN 50160,
· Voltage L1, L2, L3, N-PE,
– average, minimum, maximum and instantaneous values, range to 760 V, 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), bility to a work with current transformers,
· Crest factor for voltageandcurrent
· Frequency from 40Hz to 70Hz,
· Active, reactive, distortion, apparent power, including the type of reactive power (capacitive, inductive)
· Power recording
– Budeanu method,
– IEEE 1 459,
· Active, reactive, apparent energy
· Power factor, cosφ, tgφ
· K factor (transformer overload caused by the harmonics),
· Up to50 harmonics for voltage and current,
· TotalHarmonic 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 events recording with waveforms (up to 1s) and RMS 10 ms graphs with 30 s maximum recording time,
· Current and voltage waveforms recording after each averaging period,
· Mains signaling up to 3000 Hz,
· Transients up to ±6000 V with max. sampling frequency 10 MHz. Minimal transient time is 650 ns (PQM-703 only).

Specifications Table

Parameter Measurement range Max. resolution Accuracy
Alternating voltage (TRMS) 0.0…760 V 0.01 % Un ±0.1% Un
Crest factor Voltage 1.00…10.00 (≤1.65 for 690 V voltage) 0.01 ±5%
Crest factor current 1.00…10.00 (≤3,6 Inom ) 0.01 ± 5% m.v.
Alternating current
depending on clamp* 0.01% of nominal range ±0.1% of nominal range (error does not account for clamp error)
Frequency 40.00…70.00 Hz 0.01Hz ±0.01 Hz
Active, reactive, apparent
and distortion power
depending on conguratio
(transformers, clamp)
up to four
decimal places
depending on conguratio
(transformers, clamp)
Active, reactive
apparent energy
depending on congurati
(transformers, clamp)
up to four
decimal places
as power error
cosφ 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 error
and interharmonics
Voltage as for alternating voltage True RMS as for alternating voltage True RMS ±5% Uh for Uh ≥1% Un
±0.05% Un for Uh<1% Un
and interharmonics
Current as for alternating True RMS as for alternating True RMS ±5% Ih for Ih ≥3% In
±0.15% In for Ih<3% In
THD Voltage 0.0..100.0%
(in regards to the rms value)
0.10% ±5%
THD Current 0.0..100.0%
(in regards to the rms value)
0.10% ±5%
Active and reactive
power of harmonics
depending on con guration
(transformers, clamp)
depending on minimal
current and voltage values
Angle between current
and voltage harmonics
 -180.0…+180.00 0.10 ±(h x 10 )
K- factor 1.0…50.0 0.1 ±10%
Flicker severity P , P ST LT 0.20…10.00 0.1 ±5%
Voltage asymmetry Voltage and current 0.0…20.0% 0.01 ±0.15%
(absolute error)
Mains signaling Voltage 5…3000 Hz 0.01 Hz ± 0.15% Un for 1…3% Un, 5% Un for 3…15% Un
Transients (PQM-703 only) Voltage ±6000 V (with max. sampling 10 MHz) 5V ± (0.5% + 25 V)

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

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