Voltage Differential Protection Vdcptov - ABB REC670 Applications Manual

Section 9
Voltage protection
9.4
9.4.1
9.4.2
240

Voltage differential protection VDCPTOV

Identification
Function description
Voltage differential protection
Application
The Voltage differential protection VDCPTOV 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 97 shows some different alternative connections of this function.
IEC 61850 IEC 60617
identification identification
VDCPTOV -
1MRK 511 401-UEN A
SEMOD153860-1 v2
SEMOD167723-2 v2
ANSI/IEEE C37.2
device number
60
SEMOD153893-5 v3
Bay control REC670 2.2 IEC
Application manual