ABB RELION 670 Series Applications Manual page 169

1MRK 505 337-UUS A
7.3 Four step residual overcurrent protection, (Zero
sequence or negative sequence directionality) EF4PTOC
(51N/67N)
7.3.1 Identification
Function description
Four step residual overcurrent
protection
7.3.2 Setting guidelines
The parameters for the four step residual overcurrent protection are set via the local HMI or
PCM600. The following settings can be done for the function.
GlobalBaseSel : Selects the global base value group used by the function to define ( IBase ), ( VBase )
SBase ).
and (
SeqTypeUPol : This is used to select the type of voltage polarising quantity i.e. Zero seq or Neg seq
for direction detection.
SeqTypeIPol : This is used to select the type of current polarising quantity i.e. Zero seq or Neg seq
for direction detection.
SeqTypeIDir : This is used to select the type of operating current quantity i.e. Zero seq or Neg seq
for direction detection.
7.3.2.1 Settings for each step (x = 1, 2, 3 and 4)
Operation : Sets the protection to Enabled or Disabled .
DirModeSelx : The directional mode of step x . Possible settings are Disabled / Non-directional /
Forward / Reverse .
Characteristx : Selection of time characteristic for step x . Definite time delay and different types of
inverse time characteristics are available.
Application manual
IEC 61850
identification
EF4PTOC
When inverse time overcurrent characteristic is selected, the trip time of the stage
will be the sum of the inverse time delay and the set definite time delay. Thus, if
only the inverse time delay is required, it is important to set the definite time delay
for that stage to zero.
IEC 60617 ANSI/IEEE C37.2
identification device number
51N_67N
4(IN>)
4
alt
4
TEF-REVA V2 EN-US
Section 7
Current protection
IP14509-1 v6
M14881-1 v5
IP14988-1 v1
M15282-3 v12
M15282-9 v12.1.1
163