ABB Relion REC670, Applications Manual

Page: 174 / 658

Considering the safety margins mentioned previously, the minimum setting (Is) is:
I
s
= 1.3 × I
min
EQUATION288 V3 EN-US
(Equation 36)
The IED setting value IN>> is given in percent of the primary base current value,
IBase. The value for IN>> is given by the formula:
( ) 100
s
IN I IBase
 
IECEQUATION17003 V1 EN-US
(Equation 37)
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 Enabled or Disabled .
Pickup : Set operate current in % of IB .
IN>>Max and IN>>Min should only be changed if remote setting of operation current
level, IN>> , is used. The limits are used for decreasing the used range of the IN>>
setting. If IN>> is set outside IN>>Max and IN>>Min , the closest of the limits to
IN>> is used by the function. If IN>>Max is smaller than IN>>Min , the limits are
swapped.
MultPU : The set operate current can be changed by activation of the binary input
MULTPU to the set factor MultPU .
8.4 Directional residual overcurrent protection, four steps
EF4PTOC (51N/67N)
IP14509-1 v8
8.4.1 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
Section 8
1MRK 511 401-UUS A
Current protection
168 Bay control REC670 2.2 ANSI
Application manual