All over the Power Grid


Mobile Power Quality Analyser

The NEO PQ Analyzer are the result of more than 20 years of experience and development know-how and combined with easy-to-use software to ensure highest-standard Data Acquisition and Class A++ PQ calculation. Simple measurements. Simple Analysis. Simple Report Generation. Simply the reference instrument on the market, suitable for a wide array of applications. Because we know that our customers want and appreciate the best NEO instruments that serve way beyond EN 50160 or Class A ..


  • Power Quality

    Class A ++

  • High Sampling Rate

    120kS/s or 1MS/s

  • High Accuracy


  • High Resolution


  • High Dynamic

    0.5mA to 150kA

  • High Safety

    CAT IV 600V

  • High Performance

    PC with Multi-Touch and battery pack

  • High Connectivity

    additional input signals, Interfaces, AC&DC power, etc.


  • Visualisations

    Recorder, Waveform, FFT, Vector, Table, etc.

  • Supraharmonics 150kHz

    Harmonics, Inter- Supraharmonics, THD

  • Disturbance

    1/2 Period storing & triggering

  • Transient Recording

    Waveform & Disturbance Trigger

  • System Dynamics

    Resonances, Phase Angle Jumps, etc.

  • Phasor Measurement Unit (PMU)

    and RoCoF

  • Report

    EN50160, IEEE519, IEC61000-2-4, etc.

Multi-Channel IV-Curve Tracer

The NEO PV Master products ensure quick and reliable inspection and evaluation of solar plants including a fully-automatic AI based system diagnostic. Up to 24 input channels with a rating of up to 1600V DC together with the smart IV-curve diagnostic function allows simultaneous evaluation of multiple PV strings and complete PV arrays.

WORLD’s first and most powerful solar power plant diagnostic system.


  • Mismatch Losses

  • Hotspots

  • PID (Potential induced degradation)

  • Bypass diode defect

  • Cell Crack

  • Soiling & Glass breakage

  • Delamination & Discoloration

  • and a lot more

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State of the Art

up to 24 CHANNELS

simultaneous measurement of up to 20 strings

Smart Touch

10.1 inch full-HD Smart Touch display

Mobile Operation

up to 4 hours of operation.
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up to 1600V / 40A

designed for high-power applications (high voltage, high current)

IEC 62446

according to IEC 62446-2


USB 3.0, TCP/IP, LAN, Wifi, Bluetooth, RS232, Modbus, 104, DIO, and CAN.
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PV IV-Curve Tracing Systems

Power Quality Monitoring

With the PQM100 and PQM200 hardware lines NEO Messtechnik provides All-In-One Power Quality Monitoring solutions that ensure highest-quality data acquisition and Class A Power Quality calculation. The future-proof solution combines the functionalities of Transient Recorder, Disturbance Recorder, Phase Measure Unit and Power Quality Analyser within one instrument. PQM-SCADA is the enterprise Power Quality management servers solution with a high number of features. Clear Structure and Easy-to-Use Interfaces makes it easy to handle & analyse high amount of data.

Power Quality Monitors

  • Power Quality

    Class A with extended features

  • Disturbance

    1/2 Period storing & triggering

  • System Dynamics

    Resonances, Phase Angle Jumps, etc.

  • Transient Recording

    Waveform & Disturbance Trigger

  • Phasor Measurement Unit(PMU)

    Wide Area Monitoring System (WAMS)

  • RoCoF

    Rate of Change of Frequency

  • Energy Measurement


PQ SCADA Software

  • Visualisations

    Recorder, Waveform, FFT, Vector, Table, etc.

  • Report

    EN50160, IEEE519, IEC61000-2-4, etc.

  • Statistics

    for substations, areas, states

  • Maps

    Geographical Visualisation

  • Interfaces


  • Redundancy

    local and centralised data storage

  • Remote Configuration

    and Supervision

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NEO Power Quality Monitors


Accuracy:      0.1%
Sampling:     16 kS/s or 32 kS/s
Resolution:  24bit
Safety:            CAT IV 600V

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Accuracy:      0.05%
Sampling:     124 kS/s
Resolution:  24bit
Safety:            CAT IV 600V

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Classic PQ Analysis - beyond EN50160 ..

NEO PQ Analysers and Monitors are instruments for reliable measurements, conclusive report generation and thereby ensuring grid stability. According to the EN 50160 we would classify the following signals or values as classic PQ parameters: Power and Energy, Voltage Variations, Harmonics, Unbalance, Flicker, among others.

Harmonics, Interharmonics

Harmonics in the grid heavily influence waveforms as well as the operation and life span of electrical equipment. By using NEO instruments with high sampling rate and bandwidth you easily detect all emerging Harmonics, Interharmonics, THD and Supraharmonics up to 150kHz. Sensor calibration over the whole whole frequency range ensures the highest accurate results – also at high frequencies. This enables a precision of 0.05% for the 50th Harmonic.

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NEO Messtechnik solutions are especially powerful when it comes to the increasing demand of Higher Frequency and Supraharmonics analysis. For more information simply click on the button below.

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IEEE 519 and Harmonics

Read about the standard and all the information you need in our Multipart-Series PQ-Explained.


Flicker is a visible change in lamp brightness due to rapid fluctuations/voltage changes. The NEO Messtechnik instruments calculate the short-term, long-term flicker exposure as well as the instantaneous flicker (PST, PLT, Pinst).

Learn more about Pst, Plt, IEC 61000-4-15 Flicker meter and Current Flicker and the IEC 61400-21 in our NEO-Blog.


A multitude of trigger options allows to detect any kind of waveform deviation from the ideal pure sine wave. The trigger options include trigger on input signals (voltage, current), calculated parameters (P,Q,S, THD, x-th Harmonic etc.) and dynamic signal analysis (1/2 Period values, Phase angle Jumps, RoCoF, Envelope trigger). Furthermore, it is possible to combine multiple triggers.

International Standards

Evaluation according to national and international standards:
Grid: EN50160, IEC61000-2-2/-4/-12, IEEE 1159, IEEE 519, NRS048

Renewable: FGW-TR3, IEC61400-21, IEC61400-12, BDEW, TOR

Motor, Transformer: IEC 60076-1 / IEC60034

Equipment: IEC 61000-3-2 /-12  and IEC 61000-3-3 /-11

Symmetrical Components and Unbalance

Already a small voltage unbalance (2%) can increase the winding temperature of electrical equipment heavily. Further consequences are reduced lifetime, malfunction, increased energy consumption, among others.

The NEO Messtechnik instruments determine the Unbalance for fundamental or total spectrum as well as the symmetrical components for 10-period values or simple period-values.

The calculated positive, negative and zero-sequence systems are available for voltage, current, active and reactive power. These are major evaluation parameters of Distributed energy sources (DER). Photovoltaic or Wind Power plants need to fulfil the requirements of FGW-TR3, IEC61400-21 and other grid codes in order to be connected to the power grid.

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Symmetrical components

Learn about positive, negative and zero-sequence of 3-phase systems in our NEO-Blog.

Emerging Power Quality Phenomena

From our experience, PQ Analysis nowadays goes way beyond EN50160. This is why we use the term emerging PQ phenomena because they are increasingly driving the PQ Monitoring market and our customers.


Power Quality Analysis doesn’t stop at the 50th Harmonic order. Emissions in the frequency range from 9 kHz to 150 kHz are sources of electromagnetic interference to various electric equipment. By design, classic PQ Analysers cannot be used for troubleshooting due to their limited bandwidth.

Fortunately, all these problems do not concern engineers with the appropriate measurement equipment from NEO Messtechnik. Our customers appreciate the PQA8000H in troubleshooting Supraharmonic emissions, where its strengths really come into play ..

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Grid Impedance Measurement

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  • Grid Impedance Measurement (Z, phi, Re, Im, R, X / Zero-, Postivie- Negative Sequence)
  • Fundamental Frequency Impedance (50Hz / 60Hz /…)
  • Grid Impedance up to 10 kHz (Higher Frequencies)
  • Grid Impedance up to 150 kHz (Supraharmonics)
  • Interaction Inverter

Windpower and Renewable Testing

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  • AC Power
  • DC Power
  • Efficiency
  • Power Quality according to IEC61400 and FGW-TR3
  • Switching Operations and Grid connection
  • U-I curve respective Power Performance curve

Electric Vehicle Charging Station

  • Power Quality Analysis
  • Supraharmonics up to 150kHz
  • PLC Signal Analysis
  • CAN Data
  • DC Power
  • AC Power
  • Efficiency
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Energy Measurement

Meter input modules can be combined in a way of measuring one 3-phase voltage and multiple 3-phase current systems. The intention of such meter is typically to monitor the distribution transformer powering multiple output feeders. Functionality of multi-feeder-monitor is similar to PQ meter, with possibility to measure up to 10x  3-phase feeders in total. Multi  feeder monitor also provides detailed information about power and energy consumption of each feeder.

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System Dynamics

New applications like Microgrids, Distributed generation (DER), Distributed Control will bring higher dynamics and wider range of interactions.

During connection & reconnection of Microgrids and DER an increased number of Phase Angle jumps, frequency variations (RoCoF), voltage dips/swells and switching transients will appear.

Increasing number of inverters & power electronics will increase significance of Grid Impedance measurements,  Resonances and oscillations measurements and analysis.

One main focus of NEO Messtechnik products is to investigate System dynamics and help to design a stable grid – as much as possible. The instrument measures all kind of sytem dynamics with highest available quality.

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PMU - Phasor Measurement Unit

Highest Precision Synchrophasor Measurement

PMU – The Phasor Measurement Unit is a device for accurate synchrophasor measurements. The measurement results are used for the online detection of the electrical grid status. This principle is based on comparing the phase angles of the fundamental harmonic measured at different points of the distribution or transmission network using several devices at synchronized points in time.
High-Accurate GPS Receiver
The meter has to be equipped by the internal/external GPS for receiving synchronous timestamps.

Additional Sensor and Range calibration
The additional sensor and measurement range calibration (see chapter PQA8000 calibration) allows for highly accurate measurement results.
IEEE C37.118
The PMU firmware measures voltage and current phasors, frequency, and calculates the positive symmetrical components of voltages and currents. The measured data is sent to the superior system according to the IEEE C37.118 communication protocol. By default, the device fully complies with the requirements of IEEE C37.118, which defines the PMU accuracy in stabilized state and a communication protocol for real-time phasor transmission.

The PQA 8000 instrument offers a built-in GPS receiver together with highly-accurate voltage inputs and
– Total Vector Error 0.01% (typ.)
– Angle Accuracy 0.003° (typ.)

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Rate of Change of Frequency (RoCoF)

Rate of change of frequency RoCoF is the time derivative of the power system frequency (df/dt). Large df/dt values may endanger secure system operation. RoCoF measurements are becoming more important to system operators as the number of distributed energy resources (DER) increases.

NEO Messtechnik offers highest precision RoCoF measurement instruments. The extremely low noise floor of the amplifiers together with a smart measurement algorithmn, which reflects influences like Harmonics, Interharmonics, Flicker, etc., allows highest accurate measurements with very low latency.

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WAMS - Wide Area Monitoring System

Phasor angle differences between various parts of the transmission grid are an indicator of grid health and can provide early warning in the case of developing power system disturbances that can lead to grid separation known as islanding, or even blackout. The accurate measurement of the phasor angles across the grid is made possible by the use of GPS-synchronized phasor-sampling clocks. Nationwide networks of time-synchronized phasor measurement units (PMUs) are called Wide Area Monitoring Systems (WAMS).

The main features of the WAMS systems are the visualization and monitoring of phasors , islanding detection, resynchronization and black start detection, oscillations detection, stability and voltage monitoring. The results can also be passed to SCADA or other systems.

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DC Measurements

The number of AC to DC and DC to AC conversions in the power landscape is steadily increasing. More and more loads and energy generation units are connected via power electronic interfaces (inverters) to the grid. The number of batteries is increasing and DC power is also used for long-distance power transfer (HVDC). The measurement of AC and DC parts of the voltage and current signals is getting mandatory.

High Voltage Applications

  • Short Circuit Tests 16,7Hz / 15kV Railway Grid
  • Disturbance & Transient Record Transmission & Distribution Grid
  • Transformer and HVDC Efficiency Measurement (230V to 400kV)
  • Interferecence Current Measurement
  • Inductive Coupling Detection
  • System Dynamics ROCOF / PMU
  • Power Quality

Railway, Aircraft, Marine Applications

  • Short-Circuit Tests
  • Power Quality Testing
  • Harmonics & THD
  • Transient Recording
  • Troubleshooting
  • Pantograph and Current Shoe Testing (Railway)

Efficiency Analysis

Using best available technology on market for highest precision measurement results.

  • EV Charging Stations
  • Motor
  • Generator
  • Inverter
  • Transformer
  • HVDC
  • Any type of Electrical Equipment

Power Quality Spreading & Mitigation Analysis

The spreading analysis of Power Quality parameters is done for electrical equipment which is used in high amount or with high power. Examples are multiple Electric Vehicle (EV) Charging stations or heatpumps.

Mitigation of some Power Quality parameters very often increases the penetration of other Power Quality parameters. Typical example is using higher switching frequencies of inverters while reducing lower number harmonics often increases emission at higher frequencies.

This types of analysis require synchronous measurements of multipe input channels and instruments. The NEO Messtechnik instruments can be synchronised directly or via GPS with highest time precision.

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Photovoltaic / Solar power plant Inspection

Inspection of solar PV parks are divided in several disciplines. First of all the system needs to be checked for any safety issues. Leakage currents and isolations faults can be dangerous people and can also affect other equipment like pipelines. Further performance limiting faults like PID, Hotspots, broken, bypass diodes etc. should be detected and the performance of the whole system according to IEC62446-2 analysed.

Check out the ALL-IN-ONE inspection system PV-Master of NEO Messtechnik


Inspection of solar power plants

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