Sel 411L - Figure 3.62 Combined Currents for Line Current Source Assignment; Figure 3.63 Breaker Current Source Assignments; Table 3.42 Available Current Source Selection Settings Combinations

P.3.108
SEL-411L Relay Protection Manual Date Code 20151029
Protection Functions
Current and Voltage Source Selection
Figure 3.62 Combined Currents for Line Current Source Assignment
Figure 3.63 Breaker Current Source Assignments
All the available current and voltage source selection settings combinations
are covered in Table 3.42–Table 3.44. Notice that Global setting NUMBK
(number of breakers in scheme; see Table 5.4) influences available settings
combinations covered in Table 3.42–Table 3.44. In general, if NUMBK := 1,
then no settings directly involving a second circuit breaker are made (i.e.,
Breaker 2 current source setting BK2I is automatically set to NA and hidden,
as indicated with the shaded cells in the BK2I columns in Table 3.42 and
Table 3.43). Also, for source-selection setting ESS := N, the settings are
forced to certain values and hidden, as indicated with the shaded cells in the
ESS := N rows in Table 3.42.
IW
IX
Relay
LINEI := COMB
IW
Relay
BK1I := IW
IX
Relay
BK2I := IX
Table 3.42 Available Current Source Selection Settings Combinations (Sheet 1 of 2)
NUMBK
(Number of
Breakers)
ESS
(Source
Selection)
LINEI
(Line Current
Source)
ALINEI
(Alternate Line
Current Source)
BK1I
(Breaker 1
Current Source)
BK2I
(Breaker 2
Current
Source)
IPOL
(Polarizing
Current)
1Y see Table 3.43
1N
IW NA IW NA NA
1 1 IW IX IW
NA NA
1 1 IW NA IW
NA IAX, IBX, ICX,
or NA
1 2 IW IX IX
NA NA
1 2 IW NA IX
NA NA
13 not allowed
14 not allowed
2Y see Table 3.44
2N
IW NA IW NA NA
21 not allowed
22 not allowed