Proactive analysis for digitalized grid

Metrum PQX3-PQR is a 19” (1/2 rack) class A control instrument for energy, power quality and disturbance analysis. The instrument’s design makes it very easy to install directly into existing controller cabinets that support Essailec connectors.

The measuring instrument has maximum measurement performance. Due to the high accuracy together with the intelligent basic platform, the Metrum PQX3- PQR works excellently as both an energy control meter (0.2s) and a class A reference meter for power quality (IEC 61000-4-30).

High-quality analysis

The PQX3 instrument series is developed to provide high-quality measurement data, with a focus on energy, power quality and disturbances. All data can be analyzed with the central Metrum PQ Controller system, which includes various analysis functions, e.g. a report generator according to current standards.

Third-generation measuring instrument

The new PQX3-PQR was developed with the latest available technology and is part of Metrum’s third-generation measuring instruments. The high-performance platform includes proactive and automatic analysis of data, which supports the user throughout the process. The measuring instruments support both multi-triggering and area triggering with several selectable configuration options. This expands the field of application and gives the possibility of dynamic control.

Disturbance recorder

Metrum PQX3-PQR is a full-scale disturbance recorder. The digital inputs can be used to trigger various events, such as breaker switches, and the instru-ment records waveforms and current status at high speed on all channels.

Technical specification


Parameters Specification Information PQX3-PQR
Voltage inputs 0–460 V RMS Differential voltage inputs (+/-), 51.2 kHz/channel 4
HF voltage inputs 0–6 kV peak Built-in high-frequency inputs (1 MHz) 4
Current inputs 0–10 A RMS Differential current inputs (+/-), 51.2 kHz/channel 4
General inputs -20 mA to +20 mA 51.2 KHz 2
Digital inputs 20–150 VDC Digital inputs that support FR options 2
Digital outputs 120 VAC/150 VDC For alarm and control 2

Power supply

Parameters Specification Information PQX3-PQR
Supply voltage 85–264 VAC/110–350 VDC (47–63 Hz) Yes
Built-in backup Yes

Norm compliance

Parameters Specification Information PQX3-PQR
IEC 61000-4-30, class A < 0.1% Reference instrument Yes
IEC 61000-4-7 Harmonic measurement Yes
IEC 61000-4-15 Flicker measurements Yes
EN 50 160 Calculated in the instrument Yes
EIFS 2013:1 Calculated in the instrument Yes
National standards (FoL, DEFU, NL, ZS387, etc.) Large number of standards supported Yes
Custom reports Calculated in the instrument Yes
Storage intervals Selectable storage intervals Yes
PQDIF-format Selectable export Yes


Parameters Information PQX3-PQR
Memory 32 GB
Sampling rate, U/I Standard inputs 51.2 kHz
Sampling rate, HF inputs 1 MHz
Accuracy IEC 61000-4-30, class A < 0.1%
Resolution (U/I) Voltage/current inputs 16 bit
Resolution (GI) General measurement inputs 16 bit
Input impedance – voltage inputs 10 MOhm
Input impedance – current inputs 10 mOhm
Anti-aliasing filter Yes
PLL synchronization Yes


Parameters Specification Information PQX3-PQR
USB Computer port Yes
Ethernet port 1 (RJ-45) Ethernet port Yes
Ethernet port 2 (RJ-45) For redundancy Yes
Time synchronization For external time synchronization (NTP/PTP/IRIG-B) Yes

Physical data

Parameters Information
Size (H x D x W) 129 x 257 x 203 (excluding handles)
Model 19" (1/2 rack)
Connection Essailec connector
IP class IP40 (front), IP20 (rear)
Weight 3.7 kg
Humidity 10–85% non-condensing
Temperature -10°C to +55°C