Hitachi Relion 670 Series Applications Manual page 181

1MRK506375-UEN Rev. N
The current pickup level and definite time delay can be set independently. It is possible to release the
function operation via a binary signal. Several function instances are available.
From the measured two-phase currents, various types of measurement modes such as DFT, Peak,
and Peak-to-peak can be selected for the BRPTOC operation.
BRPTOC can be used for different line and transformer railway protection applications. If required, it
can also be used to supervise on-load tap-changer operation.
Peak and Peak-to-Peak measurement mode allow this function to be used as instantaneous over-
current protection as well. If required by application, short time delay can also be applied.
The function can be used in 16.7Hz, 50Hz and 60Hz railway supply systems. The function is a two-
phase design but it can be used in a single-phase railway supply systems as well.
8.8.4 Setting guidelines
The parameters for Overcurrent protection with binary release BRPTOC are set via the local HMI or
PCM600.
Common base IED values for primary current (IBase), primary voltage (UBase) and primary power
(SBase) are set in the global base values for settings function GBASVAL.
GlobalBaseSel: To select GBASVAL function for reference of base values.
MeasType: Selection of discrete Fourier filtered (DFT), Peak filtered or Peak-to-peak filtered signals
for BRPTOC operation.
Operation: By using this setting the function can be set On/Off.
I>: Current start level, set in % of IBase.
tDelay: Time delay of the operation in s.
8.9 Voltage-restrained time overcurrent protection VRPVOC
8.9.1 Function revision history
Document
revision
A
B
C
D
E
F
G
M
N
Railway application RER670
Application manual
Product History
revision
2.2.1 -
2.2.1 -
2.2.1 -
2.2.1 -
2.2.4 -
2.2.4 -
2.2.5 -
2.2.6 -
2.2.6 New function introduced in RER670 2.2.6
© 2017 - 2023 Hitachi Energy. All rights reserved
Section 8
Current protection
GUID-809614D6-C191-4C41-9094-9FD4CB9ED0F7 v4
GUID-613620B1-4092-4FB6-901D-6810CDD5C615 v5
GUID-9B72080E-B886-4138-B8BC-CCB99C289C87 v2
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