Measurement At The Neutral Terminal (E. G. Of The Generator) - Woodward HighPROTEC MRU4 Manual De Instrucciones

2 Hardware
2.5.3.3 Measurement at the Neutral Terminal (e. g. of the Generator)
2.5.3.3 Measurement at the Neutral Terminal (e. g. of the Generator)
L1
Elemento de Ejemplo
20000 V
3
After the voltage inputs have been connected correctly the residual voltage is measured
with the following setting:
• »VG[x] . Fuente VG« = «medido»
Quotient / Scaling Based on Vn
All voltage thresholds of the voltage protection modules are set in units of the nominal
voltage Vn, that is dependent on the settings »VT . TVT sec« and »VT . TVT pri«.
Example: For the voltage transformer data shown in the diagram above (secondary
voltage = 100 V / √3 ̅ ) , we have:
• »VG[x] . VG>« = 1.0⋅Vn = 100 V
Residual Voltage in Case of a 1p Ground (Earth) Fault
• VG med = Vn / √3 ̅
Example: For the voltage transformer data shown in the diagram above (secondary
voltage 100 V / √3 ̅ ) , the result is:
• VG med = Vn / √3 ̅ = 57.74 V
106
L2 L3
Sal poten
100 V
3
X?.
1
2
3
4
5
6
7
8
Par. cam./VT
Nombre Valor
VT pri 20000
VT sec 100
VT con Fase a masa
TVT pri 20000
TVT sec 100
Sinc V L12
MRU4
L1
L2
L3
VL1/VL12
VL2/VL23
VL3/VL31
VG
Unidad
V
V
V
V
MRU4-3.7-ES-MAN