Tabla de contenido
Publicidad
MAVOWATT 230, 240, 270 & 270-400
Calculations
Measuring and monitoring power quality (PQ) parameters require several calculations, i.e. RMS values of voltage and current,
etc. Depending on the type of parameter measured, calculations are performed using samples of monitored waveforms or using
every sample cycle for quick disturbance detection. This section defines the parameters used in PQ calculations.
NOTE: The parameter specifications provided in this section are for reference only and are subject to change without notice.
Description
Volts RMS
Derived from
200 mS
(10/12 cycles
50/60 Hz)
Aggregated to
selected interval
Volts DC Derived
from
200mS (10/12
cycles 50/60 Hz)
Aggregated to
selected interval
Volts ½ cycle slide
Cyclic RMS of full
cycle restarted every
½ cycle
(used in Sag/Swell
detection)
DC of individual
Cycle
* +/- 0.05 % of FS for input < 40 V
44
PQ Parameter Calculations
Abbreviation
Wiring Configuration
Vrms-a
Single phase
Vrms-b
Split phase
Vrms-c
Wye
Vrms-d
Vrms-ab
Measured for Delta
rms-bc
Calculated for Wye
Vrms-ca
Vdc-a
Single phase
Vdc-b
Split phase
Vdc-c
Wye
Vdc-d
Vdc-ab
Measured for Delta
Vdc-bc
Calculated for Wye
Vdc-ca
Vcyc-a
Single phase
Vcyc-b
Split phase
Vcyc-c
Wye
Vcyc-d
Vcyc-ab
Measured for Delta
Vcyc-bc
Calculated for Wye
Vcyc-ca
Vcycdc-a
Single phase
Vcycdc-b
Split phase
Vcycdc-c
Wye
Vcycdc-d
Vcycdc-ab
Measured for Delta
Vcycdc-bc
Calculated for Wye
Vcycdc-ca
Formula
where n=512 samples
where n=512 samples
where n=512 samples
where n=512 samples
GMC-I Messtechnik GmbH
Units
Precision
Volts
+/- 0.1% of
Reading *
15 KHz BW
Volts
+/- 0.2% of
Reading *
Volts
+/- 0.2% of
Reading *
Volts
+/- 0.2% of
Reading *
Publicidad
Tabla de contenido
