ABB Relion 670 Series Applications Manual page 153

1MRK 505 370-UUS Rev. K
Section 7
7.1 Directional phase overcurrent protection, four steps
OC4PTOC (51_67)
7.1.1 Function revision history
Document
revision
A
B
C
D
E
F
G
H
J
K
7.1.2 Identification
Function description
Directional phase overcurrent
protection, four steps
7.1.3 Application
Directional phase overcurrent protection, four steps OC4PTOC (51_67) is used in several applications in
the power system. Some applications are:
Busbar protection REB670
Application manual
Current protection
Product History
revision
2.2.1 -
2.2.1 -
2.2.2 -
2.2.3 -
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 -
2.2.4 -
2.2.5 • The harmonic restraint function changed to freeze the definite and IDMT timers.
• The maximum value of the settings IMin1, IMin2, IMin3 and IMin4 has been decreased
to 1000.0 % of IBase.
IEC 61850
identification
OC4PTOC
© 2017 - 2021 Hitachi Power Grids. All rights reserved
IEC 60617 ANSI/IEEE C37.2
identification device number
51_67
TOC-REVA V2 EN-US
Section 7
Current protection
SEMOD129998-1 v8
GUID-154CAE8E-8FD4-460C-852D-6E5C93545F0D v1
M14885-1 v6
M15335-3 v9
147