ABB REB670 - Voltage Differential Protection VDCPTOV (60); Application; Identification

8.4 Voltage differential protection VDCPTOV (60)
SEMOD153860-1 v2
8.4.1 Identification
SEMOD167723-2 v2
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Voltage differential protection VDCPTOV - 60
8.4.2 Application
SEMOD153893-5 v3
The Voltage dif
ferential 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
indicates a fault, either short-circuited or open element in the capacitor bank. It is
mainly used on elements with external fuses but can also be used on elements with
internal fuses instead of a current unbalance protection measuring the current
between the neutrals of two half’s of the capacitor bank. The function requires
voltage transformers in all phases of the capacitor bank. Figure
112 shows some
different alternative connections of this function.
Section 8 1MRK 505 370-UUS A
Voltage protection
256 Busbar protection REB670 2.2 ANSI
Application manual