ABB RER670 - Two Step Residual Overcurrent Protection EF2 PTOC; Application; Identification

The minimum theoretical current setting (Imin) will in this case be:
I m in M A X I
fA
I
fB
I
M
, ,( )³
EQUATION287 V1 EN-US (Equation 40)
Where:
I
fA
and I
fB
have been described for the single line case.
Considering the safety margins mentioned previously, the minimum setting (Is) is:
I
s
= 1.3 × I
min
EQUATION288 V3 EN-US (Equation 41)
Transformer inrush current shall be considered.
The setting of the protection is set as a percentage of the base current (IBase).
Operation: set the protection to On or Off.
IN>>: Set operate current in % of IB.
8.4 Two step residual overcurrent protection EF2PTOC
GUID-9E7DA007-48BA-4A87-974C-3AAFD5E336D1 v2
8.4.1 Identification
M14881-1 v6
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Two step residual overcurrent
protection
EF2PTOC
2(IN>)
IEC15000229 V1 EN-US
51N_67N
8.4.2 Application
M12509-12 v10
The two step residual overcurrent protection
EF2PT
OC is used in several
applications in the power system. Some applications are:
1MRK 506 375-UEN A Section 8
Current protection
Railway application RER670 2.2 IEC 169
Application manual