Sel 411L - Figure 3.145 Over;Undervoltage Logic; Over;Undervoltage Elements

P.3.213
Date Code 20151029 Protection Manual SEL-411L Relay
Protection Functions
Over/Undervoltage Elements
Over/Undervoltage Elements
The relay offers as many as 6 undervoltage and 6 overvoltage elements. Each
of these 12 elements has two levels, for a total of 24 over-/undervoltage
elements. Figure 3.145 shows the over-/undervoltage element logic.
Use the E27 and E59 settings to enable as many over- and undervoltage
elements as you need.
Select any operating quantity shown in Table 3.112 for the 27Ok settings, and
any value from Table 3.113 for the 59Ok settings as an input quantity (27Ok
and 59Ok settings).
You can select the same quantity for an undervoltage element as for an
overvoltage element.
Figure 3.145 Over/Undervoltage Logic
27Ok
(setting)
27TCk
(SEL
OGIC)
27PkP1
(setting)
S
1
27PkP2
(setting)
27kP1T
27kP1
27kP2
59Ok
(setting)
59PkP1
(setting)
S
2
59PkP2
(setting)
59kP2
0
0
Undervoltage Element (27)
Overvoltage Element (59)
27O1Q
Analog quantity based
on the 27Ok setting
Analog quantity based
on 59Ok setting
27PkD1
59PkD1
1
0
1
0
1
1
0
0
S
1
:= 1 if 27TCk evaluates to 1
0 if 27TCk evaluates to 0
S
2
S
1
k := 1–6
59kP1T
59kP1
0
0
59TCk
(SELOGIC)
S
2
:= 1 if 59TCk evaluates to 1
0 if 59TCk evaluates to 0
∞
∞