ABB REG670 - Voltage Differential Protection VDCPTOV

9.5 Voltage differential protection VDCPTOV
9.5.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Voltage differential protection VDCPTOV - 60
9.5.2 Functionality
A voltage differential monitoring function is available. It compares the voltages from
two three phase sets of voltage transformers and has one sensitive alarm step and one
trip step.
9.5.3 Function block
IEC06000528-2-en.vsd
VDCPTOV
U3P1*
U3P2*
BLOCK
TRIP
START
ALARM
U1LOW
U2LOW
UL1DIFF
UL2DIFF
UL3DIFF
IEC06000528 V2 EN
Figure 254: VDCPTOV function block
9.5.4 Signals
Table 291: VDCPTOV Input signals
Name
Type Default Description
U3P1 GROUP
SIGNAL
- Bus voltage
U3P2 GROUP
SIGNAL
- Capacitor voltage
BLOCK BOOLEAN 0 Block of function
Table 292: VDCPTOV Output signals
Name
Type Description
TRIP BOOLEAN Voltage differential protection operated
START BOOLEAN Start of voltage differential protection
ALARM BOOLEAN Voltage differential protection alarm
U1LOW BOOLEAN Loss of U1 voltage
Table continues on next page
Section 9 1MRK502052-UEN B
Voltage protection
528
Technical manual