Voltage Differential Protection Vdcptov (60) - ABB RELION 670 SERIES Applications Manual

Section 10
Voltage protection
10.5
10.5.1
10.5.2
586
V/Hz
%
150
140
130
120
110
100
0.05 0.1 0.2 0.5
t6 t5 t4
IEC01000377 V1 EN
Figure 292: Example on overexcitation capability curve and V/Hz protection settings
for power transformer

Voltage differential protection VDCPTOV (60)

Identification
Function description
Voltage differential protection
Application
The Voltage differential protection VDCPTOV (60) functions can be used in some
different applications.
• Voltage unbalance protection for capacitor banks. The voltage on the bus is
supervised with the voltage in the capacitor bank, phase- by phase. Difference
transformer capability curve
relay operate characteristic
1 2 5 10
t3 t2
IEC 61850 IEC 60617
identification identification
VDCPTOV
1MRK 506 369-UUS -
Continous
20 50 100 200
(minutes)
t1
en01000377.vsd
ANSI/IEEE C37.2
device number
- 60
Line distance protection REL670 2.2 ANSI
Application manual
Time