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7.6. PHASOR DIAGRAM
The
Phasor sub-menu displays a vector representation of the fundamentals of the voltages and currents. It indicates their
associated quantities (modulus and phase of the vectors) and the negative-sequence voltage and current unbalance rates.
NOTE: To allow the display of all vectors, those of which the modulus is too small to be pictured are displayed with their
names followed by an asterisk (*).
7.6.1. 3V PHASOR
This screen displays a vector representation of the fundamentals of phase-to-neutral voltages and currents. It indicates their
associated quantities (modulus and phase of the phase-to-neutral voltage vectors) and the negative-sequence voltage unbalance rate.
The reference vector of the representation (at 3 o'clock) is V1.
Column of values for each vector
(1, 2, and 3).
|V1|, |V2| and |V3|: module of
the vectors of the fundamentals
of the phase-to-neutral voltages
(phases 1, 2 and 3).
Φ
: phase angle of the
12
fundamental of phase 1 with
respect to the fundamental of
: phase angle of the
Φ
23
fundamental of phase 2 with
respect to the fundamental of
: phase angle of the
Φ
31
fundamental of phase 3 with
respect to the fundamental of
7.6.2. 3U PHASOR DIAGRAM DISPLAY SCREEN
This screen displays a vector representation of the fundamentals of the phase-to-phase voltages and of the currents. It indicates their
associated quantities (modulus and phase of the phase-to-phase voltage vectors) and the negative-sequence voltage unbalance rate.
The reference vector of the representation (at 3 o'clock) is U1.
The information displayed is identical to that described in §7.6.1 but relative to the phase-to-phase voltage.
7.6.3. 3A PHASOR DIAGRAM DISPLAY SCREEN
For sources having a neutral, this screen displays the vector representation of the fundamental component of the phase-to-neutral
voltages and of the current. For 3-wire three-phase (source without neutral), this screen displays only the vector representation of the
fundamental components of the current. It indicates their associated quantities (modulus and phase of the current vectors) and
negative-sequence current unbalance rate. The reference vector of the representation (at 3 o'clock) is A1.
The information displayed is identical to that described in §7.6.1 but relative to the current.
phase 2.
phase 3.
Vunb: negative-sequence voltage
unbalance rate.
phase 1.
Figure 7-21
62
Indicators showing potential saturation
of the channel.
Phasor diagram.
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