Determination Of The Residual Voltage Vg For Various Connection Types; Calculation From The Three Phase-To-Ground Voltages - Woodward MCDGV4 Traducción Del Original

2.8.5 Determination of the Residual Voltage VG for Various Connection
Types
The residual voltage can be calculated either from the three phase-to-ground voltages, or
it can be directly measured at the neutral terminal (e. g. of the generator) or over the
broken delta.
The method is selected (via setting parameter »VG[x] . Fuente VG«) for each instance of
the residual voltage protection »VG[x]«
2.8.5.1

Calculation from the Three Phase-to-Ground Voltages

L1 L2 L3
V̲ L 12
V̲ L 23
V̲ L 31
The residual voltage is calculated from the three phase-to-ground voltages with the
following setting:
• »VG[x] . Fuente VG« = «calculado»
The residual voltage can be calculated only if the phase-to-ground voltages (star
connection) are connected to the measuring inputs of the device.
If the phase-to-phase voltages (delta connection) are measured instead of the phase-to-
ground voltages (star connection) it is not possible to calculate the residual voltage.
MCDGV4-3.7-ES-MAN

2.8.5 Determination of the Residual Voltage VG for Various Connection Types

Elemento de Ejemplo
20000 V
100 V
3
3
V̲ L 1'
V̲ L 1
V̲ L 2
V̲ L 3
¡INDICACIÓN!
separately.
Par. cam./VT
Nombre
VT pri
VT sec
VT con
TVT pri
TVT sec
Sinc V
V̲ L 31'
V̲ L 12'
V̲ L 23'
V̲ L 2' V̲ L 3'
MCDGV4
Valor Unidad
20000 V
100 V
Fase a masa
20000
V
100 V
L12
X?.
L1
1
2
L2
3
4
L3
5
N
6
7
8
2 Hardware
VL1/VL12
VL2/VL23
VL3/VL31
VG
147