Voltage Differential Protection Vdcptov (60) - ABB RELION RET670 Applications Manual

Section 10
Voltage protection
10.5
10.5.1
632
Information on the cooling time constant T
transformer manufacturer.
V/Hz
%
150
140
130
120
110
100
0.05 0.1 0.2 0.5
t6 t5 t4
IEC01000377 V1 EN-US
Figure 298: Example on overexcitation capability curve and V/Hz protection
settings for power transformer

Voltage differential protection VDCPTOV (60)

Identification
Function description
Voltage differential protection
should be retrieved from the power
cool
transformer capability curve
relay operate characteristic
1 2 5 10
t3 t2
IEC 61850 IEC 60617
identification identification
VDCPTOV
1MRK 504 163-UUS A
Continous
20 50 100 200
(minutes)
t1
en01000377.vsd
ANSI/IEEE C37.2
device number
- 60
Transformer protection RET670 2.2 ANSI
Application manual
Time
SEMOD153860-1 v2
SEMOD167723-2 v2