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Specification for a IEC 61000-4-30 Class A compliant Power Quality Recorder
The device shall be a Class A multifunctional measurement device with the main purpose of
measure and monitor the power quality according to IEC 62586-1 product standard. The device
shall encompass all important quantities for the assessment of electrical supply networks. The
recorder shall acquire, display, analyze and communicate measured electrical quantities of the
electrical network. The following electrical quantities have to be acquired at a minimum: AC
voltage, AC current, frequency, harmonics, interharmonics, flicker, power, energy, power factor,
THD.
The acquisition and calculation has to be according to the standard IEC 61000-4-30 Class A
power quality measurement standard. The device has to provide the possibility of long term data
evaluation directly in the device with the possibility of displaying an report in accordance with
power quality standard such as EN 50160.
The device shall come with an integrated display providing easy display of measured real time
quantities of the electrical network.
For configuration and evaluation the power quality recorder has to feature an integrated webserver providing easy to use parameterization and evaluation functionality. No additional
software for device settings shall be used.
The device must incorporate at least 2GB internal memory for historical data.
The device must allow connection over MODBUS RTU Master of up to 8 slave MODBUS RTU
RTU devices.
Measurement inputs, binary inputs and outputs
 4 inputs for AC voltage measurements up to 400V (L-N/PE), 690V (L-L) rated input
voltage
 4 inputs for AC current measurements, rated input current AC 1A to 5A
 Sampling rate per channel: 10,24 kHz
 2 binary inputs and 2 binary outputs
 It must be possible to expand I/Os
Continuous measured of the following quantities:
 . Alternating voltage U
 . Alternating current I
 . Power frequency f (fundamental component)
 . Active power P
 . Reactive power Q
 . Apparent power S
 . Power measurements W
 . Active power factor cos phi
 . Measurements up to the 63rd harmonics order
 . Interharmonics of voltage and current
Event-specific measured value acquisition:
 Min./max./mean values with configurable intervals - (30 s, 1 min, 10 min, 15 min, 30 min,
1 h, or 2 h)
 Recording of events: voltage dips, overvoltages, interruptions: with 1/2 cycle continuous
monitoring and recording with and time stamp (duration)
 Limit value violations
 Transient detection (100microsseconds)
 Waveform capture of triggered events of voltage and current. Up to 3seconds records
must be possible.
Harmonic Directions
Harmonics of voltages, currents, and powers up to the 63rd order according to the
IEC 61000-4-7 standard.
The following values are given for each harmonic:
• RMS value (for power: RMS value and sign)
• Phase angle
The sign of the active power of the single harmonic can indicate the direction of the power flow
of this harmonic in a system from the device installation point of view. Thus, it is possible to
indicate loads that generate the harmonics and that are probably the cause of the harmonics.
For voltage and current, the given phase angle of the harmonic refers to the voltage of the
fundamental component in the respective phase. The phase angle between the current
harmonic and the corresponding voltage harmonic is used to calculate the sign of the active
harmonic power.
IEC 61000-4-30 Ed.2 measurement accuracy and range
The accuracy and range specifications of the power quality recorder shall match the IEC 610004-30 Ed.2 standard.
Measurement
Unit
Measurement Range
Operat. Measurem. Uncertainty acc. to
IEC 62586-1, Class A,
IEC 61000-4-30, IEC 61000-4-7,
IEC 61000-4-15
Frequency f
Hz
±10 mHz in the measuring ranges:
50 Hz (±15 %): 42.5 Hz bis 57.5 Hz
60 Hz (±15 %): 51.0 Hz bis 69.0 Hz
10 mHz > 2 V required
Voltage
V
10 % to 150 % Udin
±0.1 % Udin
AC 57.73 V to 400 V (autorange)

IEC 61000-4-30 Class A: to AC 230 V: 200 % overvoltage
Flicker Pst, Plt
-
Pst, Plt: 0.2 to 10
Acc. to class A, IEC 61000-4-30:
Pst: ±5 %; Plt: ±5 %,
Accuracy Pinst: ±8 %
Undervoltages (dips) and
overvoltages (swells) of
the mains voltage
V, s
-
Amplitude ±0.1 % Udin; 1 cycle;
Voltage interruptions of
the mains voltage
V, s
-
Duration: 1 cycle
Voltage unbalance
%
Measurement range 0.5 % to 5.0 % ±0.1 %
Harmonics of
voltage
% or V
10 % to 200 % acc. to
IEC 61000-2-4, class 3
IEC 61000-4-7, class 1:
Condition: Vm > 1 %
Vrated Maximum error: ±5
% Vm
------------------------------Condition: Um < 1 % Vrated
Maximum error: ±0.05 % Vrated
Udin: Primary nominal voltage, corresponds to the primary rated voltage
Vm: Measured value
Vrated: Rated voltage
Communication
 RJ45 Ethernet interface with:
o IEC 61850 server
o Modbus TCP server
o SNMP Server
o HTTP Server
 RS485 interface with 9-pin D-sub socket and Modbus RTU Master protocol for up to 8
slave Modbus RTU devices
 Integrated switch to connect other field devices
Synchronisation
 Internal RTC clock
 External synchronization via NTP
Indications, LED
Minimum 4 configurable LEDs for indication of device status, limit value violations and
communication status
Display and function keys
 Integrated Display with configurable display content:
 List view
 Measured values screen
 Min 2 function keys for easy navigation
Auxiliary Power supply
Rated input voltage: 24 VDC to 250 VDC (+/-20%); 110 VAC to 230AC (+/-20%), 50Hz/60Hz;
Memory and data exchange formats
Minimum 2-GB memory with the possibility of data export by using PQDif (IEEE1159.3),
COMTRADE (IEEE Std C37.111) and CSV-file and data exchange formats.
Configuration, visualization and evaluation on board functions
 Power quality values and other events are displayed directly via a web browser with
HTML pages. The following evaluations must be possible:
 Online and operational measured values and messages from the device and from the
relevant Modbus slave device displayed via HTML and on the display
 Event evaluations und power quality recordings as well as mean values displayed in
tables or graphs
 Grafical visualization of events on HTML
 Power Quality Reports generated according to the EN 50160 and ITIC/CBEMA event
curves standard
 Logging of transient data
Data export
Recorded data must be exported in the following standard formats:
 CSV data
 PQDIF data – IEEE1159.3: PQDIF for PQ recordings (events, measurements, logs)
 COMTRADE data – IEC 60255-24/IEEE Std C37.111:
Operating conditions
Unless otherwise specified the Power Quality Recorder must met the following requirements:
 Operating temperature: -25°C to +55°C
 Maximum relative humidity: 95% of
 No condensation
 Max. altidude: 2000m
 Only indoor operation
Standards and norms
The device has to be developed and tested in accordance with the applicable product standard
Product standard IEC 60068
 Electrical tests
o IEC EN 61000-6-2
o IEC EN 61000-6-4
o IEC EN 61010-1
o IEC EN 61010-2

Mechanical tests
o IEC 60068