To log supply quality for weeks on a pole or in an outdoor switchboard and produce EN 50160 reports, a class S recorder to IEC 61000-4-30 with a sealed housing, supply from the measured network and a backup battery is enough. The APQM-700 logs up to 1100 parameters in class S, measures voltages up to 760 V with ±0.5% of Unom and currents up to 6 kA depending on the clamp, and keeps working in rain and at -20 °C thanks to its IP65 housing, its internal heater and a battery lasting more than 6 hours.
APQM-700 key data
- Standards: class S measurement methods and accuracy per IEC 61000-4-30; flicker per IEC 61000-4-15; harmonics per IEC 61000-4-7 (class II); compliance reports against EN 50160.
- Voltage: 4 inputs (L1, L2, L3 and N) up to 760 V RMS, AC from 40 to 70 Hz or DC; uncertainty ±0.5% of Unom; measurement category CAT IV 300 V / CAT III 600 V / CAT II 760 V.
- Current: 4 inputs (three phases and neutral) for rigid and flexible clamps, from 0.01 A up to 6000 A depending on the clamp; analyser uncertainty without clamps ±0.2% of Inom.
- Sampling and frequency: 16-bit converter at 10.24 kHz with simultaneous sampling on all channels (204.8 samples per cycle at 50 Hz); frequency from 40 to 70 Hz to ±0.05 Hz.
- Harmonics, flicker and unbalance: voltage and current harmonics from DC to the 50th order with THD, to ±0.15% of Unom (or ±5% of the measured value from 3% of Unom); Pst (10 min) and Plt (2 h) from 0.4 to 10; unbalance from 0 to 10% to ±0.3% absolute.
- Events: dips, swells and interruptions detected on the one-cycle RMS value refreshed every half cycle (±1% of Unom), with a 6-cycle waveform (2 before and 4 after); inrush current recorded for up to 60 s.
- Recording: averaging periods from 1 s to 30 min; 2 GB microSD card expandable to 32 GB; download over USB at up to 921.6 kbit/s.
- Outdoor installation: IP65, -20 to +55 °C with a 5 W internal heater, supply from the measured network at 100…415 V AC or 140…415 V DC, 4.4 Ah Li-ion battery for more than 6 h, 200 × 180 × 77 mm and 1.6 kg, for pole or DIN-rail mounting.
Advantages
Massive parameter logging
Up to 1100 parameters with average, minimum, maximum and instantaneous values, including powers by Budeanu and IEEE 1459, energies, harmonics up to the 50th, THD, flicker and unbalance.
Four voltage and four current inputs
It measures L1, L2, L3 and N up to 760 V, works with voltage transformers, and measures currents up to 6 kA depending on the clamp, with physical measurement of the neutral current.
Built for the outdoors
IP65 ingress protection allows operation in rain, snow and high humidity, and the built-in heater keeps measurements stable down to -20 °C.
Autonomy during power failures
The internal battery keeps the recording running for at least 6 hours if the supply fails, without losing data on the memory card.
Events with waveforms
It detects events in real time and stores waveforms and half-period RMS graphs to locate the origin of disturbances.
Applications
- Recording of load parameters in industry and maintenance services.
- Four-quadrant power analysis in wind and solar farms.
- Supply quality audits in accordance with EN 50160.
- Diagnostics of disturbances in substations and LV switchboards.
About the product
The APQM-700 is a compact analyser of 200 × 180 × 77 mm and about 1.6 kg, powered from the mains at 100…415 V AC or 140…415 V DC, which logs onto a removable 2 GB microSD card expandable to 32 GB; data is downloaded over USB and analysed in the PC software, with reports according to EN 50160.
Technical specifications
| Measurement class | Class S per IEC 61000-4-30; EN 50160 reports |
| Voltage inputs | 4 (L1, L2, L3, N); up to 760 V; voltage transformers |
| Current inputs | 4; up to 6 kA depending on clamp; neutral measured |
| Frequency | 40.00…70.00 Hz; accuracy ±0.05 Hz |
| Recording | Up to 1100 parameters: avg, min, max, instantaneous |
| Harmonics | Up to the 50th in voltage and current; THD |
| Memory | Removable microSD 2 GB; expandable to 32 GB |
| Communication | USB or external reader; PC software |
| Power supply | 100…415 V AC / 140…415 V DC; battery min. 6 h |
| Environment | IP65; internal heater; -20…+55 °C |
| Measuring category | CAT IV 300 V / CAT III 600 V |
| Dimensions and weight | 200 × 180 × 77 mm; approx. 1.6 kg |
| Voltage and current uncertainty | ±0.5% Unom; ±0.2% Inom (without clamps) |
| Flicker and unbalance | Pst/Plt 0.4…10 per IEC 61000-4-15; unbalance 0…10%, ±0.3% |
| Sampling | 16-bit; 10.24 kHz, simultaneous on all channels |
Frequently asked questions
Is the APQM-700 class A or class S?
Class S per IEC 61000-4-30: it measures voltage to ±0.5% of Unom and frequency to ±0.05 Hz, and its recordings support EN 50160 reports. Class A, with ±0.1% of Unom and a GPS-synchronised clock, is offered by the APQM-702/703.
Which networks can the APQM-700 measure?
Single-phase, split-phase, three-phase wye with or without neutral and delta networks, also with two clamps (Aron), directly up to 760 V and above that through user-defined voltage transformers; current is measured on the three phases and the neutral.
Which standards does the APQM-700 follow?
All parameters are recorded in accordance with class S of IEC 61000-4-30, and the software generates reports against EN 50160 and user-defined reference conditions.
Does it work outdoors?
Yes. The IP65 housing withstands rain, snow and high humidity, and the internal heater keeps operation stable from -20 °C up to +55 °C.
What happens during a power cut?
The internal rechargeable battery maintains the recording for a minimum of 6 hours, so no measurement campaign is lost.
How is the data retrieved?
From the removable 2 GB memory card over a USB connection or an external reader, then analysed with the free PC software.
Which currents can it measure?
Up to 6 kA depending on the clamps used, on the three phases and the neutral, whose current is measured physically on a fourth input.
