Description
3.7 Date and time
SENTRON PAC4200
System Manual, 09/2009, A5E02316180B-02
43
The display represents the instantaneous value of the phase angle on several screens:
● Phasor diagram,
can be called with "MAIN MENU" > "PHASOR DIAGRAM"
● Value table of the phasor diagram, row
V"
can be called with "MAIN MENU" > "PHASOR DIAGRAM" > F1
Figure 3-10 Phasor diagram, value table
Unbalance
A three-phase system is referred to as balanced if the three phase-to-phase voltages and
phase-to-phase currents have an identical amplitude and are offset 120° from each other.
SENTRON PAC4200 calculates the unbalance for voltage and current according to the
EN 61000-4-27:2000 standard.
The display represents the unbalance information on several screens:
● "PHASE UNBAL.", current and voltage unbalance in percent
● PHASOR DIAGRAM, absolute values of the current, voltage, and phase angle "
V" for
each phase
Figure 3-11 Voltage and current unbalance
In addition to the vectorial calculation of the phase unbalance, SENTRON PAC4200 also
supplies the amplitude unbalance for current and voltage according to the IEC 61557-12
standard at the communication interfaces. The amplitude unbalance only takes account of
the amplitude and not the phase angle.
3.7 Date and time
UTC time and local time
The internal clock of SENTRON PAC4200 measures UTC time. All information about the
date and time (time stamp) that can be called at the communication interfaces must be
interpreted as UTC time.
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