4.2
Measurands
4.2.1
Measurands in 1-phase Systems
The SENTRON PAC5100/5200 can measure and calculate quantities in 1-phase systems, Chapter 4.2.3
contains a detailed list of all measurands.
Measured and Calculated Quantities
The operational measurands alternating voltage V
other operational measurands, harmonics, THDS (Subgroup Total Harmonic Distortion), and power and energy
types are calculated from the measured operational measurands.
Operational Measured Values
•
Alternating voltage V
Va
•
Alternating current I
•
Active power factor cos : cos (a)
•
Power factor PF: PFa
•
Phase angle : a
•
Frequency (system frequency): f
•
Flicker (only SENTRON PAC5200): Pst, Plt
Harmonics
•
Fundamental V
•
Harmonics V, magnitude: H_Va-x
•
Fundamental I
•
Harmonics I, magnitude: H_Ia-x
•
Subgroup Total Harmonic Distortion V: THDS_Va
•
Subgroup Total Harmonic Distortion I: THDS_Ia
Power Quantities
•
Active power P: Pa
•
Reactive power Q: Qa
•
Reactive power (fundamental) Q1: Q1a
•
Apparent power S: Sa
Energy Quantities
•
Active energy WP: WPa (supply and demand)
•
Reactive energy WQ: WQa (inductive and capacitive)
•
Apparent energy WS: WSa
SENTRON PAC5100/5200, 7KM5212/5412, Device Manual
E50417-H1040-C568-A1, Edition 03.2015
P
(mains voltage referred to the neutral conductor/protective ground N; RMS value):
ph
(current through the conductor, RMS value): Ia
P
, alternating current I
, and frequency are measured. All
P
4 Measurands and Recording
4.2 Measurands
39