ABB RELION 650 SERIES, Technical Manual

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Function Range or value Accuracy
Critical impulse time 10 ms typically at 0 to 2 x I
set
-
Operate time at 0 to 10 x I
set
Min. = 5 ms
Max. = 15 ms
-
Reset time at 10 x I
set
to 0 Min. = 25 ms
Max. = 35 ms
-
Critical impulse time 2 ms typically at 0 to 10 x I
set
-
Dynamic overreach < 5% at t = 100 ms -
7.4 Directional residual overcurrent protection, four
steps EF4PTOC
IP14509-1 v8
7.4.1 Identification
M14881-1 v6
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Directional residual overcurrent
protection, four steps
EF4PTOC
4(IN>)
4
alt
4
TEF-REVA V2 EN-US
51N_67N
7.4.2 Functionality
M13667-3 v19
Directional residual overcurrent protection, four steps (EF4PTOC) can be used as
main protection for phase-to-earth faults. It can also be used to provide a system
back-up, for example, in the case of the primary protection being out of service due
to communication or voltage transformer circuit failure.
EF4PTOC has an inverse or definite time delay independent for each step.
All IEC and ANSI time-delayed characteristics are available together with an
optional user-defined characteristic.
EF4PTOC can be set to be directional or non-directional independently for each
step.
IDir, UPol and IPol can be independently selected to be either zero sequence or
negative sequence.
A second harmonic blocking can be set individually for each step.
Directional operation can be combined together with the corresponding
communication logic in permissive or blocking teleprotection scheme. The current
reversal and weak-end infeed functionality are available as well.
Section 7
1MRK 506 382-UEN A
Current protection
182 Line distance protection REL650 2.2 IEC
Technical manual