Sel 411L - Figure 3.64 ESS:= 1, Single Circuit Breaker Configuration; Figure 3.65 ESS:= 2, Single Circuit Breaker Configuration; Table 3.47 ESS:= 1, Current and Voltage Source Selection; Table 3.48 ESS:= 2, Current and Voltage Source Selection

P.3.113
Date Code 20151029 Protection Manual SEL-411L Relay
Protection Functions
Current and Voltage Source Selection
Figure 3.64 ESS := 1, Single Circuit Breaker Configuration
ESS := 2, Single Circuit Breaker Configuration—Two Current Inputs
Set ESS to 2 for single circuit breaker applications using two current sources.
Figure 3.65 illustrates this application along with the corresponding current
and voltage sources. The relay uses current source IW for line relaying and
current source IX for Circuit Breaker 1 failure protection.
Figure 3.65 ESS := 2, Single Circuit Breaker Configuration
Table 3.47 ESS := 1, Current and Voltage Source Selection
Setting Description Entry Comments
NUMBK Number of circuit breakers in scheme (1, 2) 1
LINEI Line current source (IW) IW Automatic
ALINEI Alternate line current source (IX, NA) NA
ALTI Alternate current source (SEL
OGIC equation) NA Hidden
a
a
Hidden when preceding setting is NA.
BK1I Breaker 1 current source (IW) IW Automatic
BK2I Breaker 2 current source (NA) NA Hidden
IPOL Polarizing current (IAX, IBX, ICX, NA) NA
ALINEV Alternate line voltage source (VZ, NA) NA
ALTV Alternate voltage source (SEL
OGIC equation) NA Hidden
Relay
BUS
CB1
3
3
IW
VAZ
VY
1
Analog Input
IW
VY
VAZ
Function
CB1 protection, line protection
Line protection
Synchronism check
Table 3.48 ESS := 2, Current and Voltage Source Selection
Setting Description Entry Comments
NUMBK Number of circuit breakers in Scheme (1, 2) 1
LINEI Line current source (IW) IW Automatic
Relay
BUS
CB1
3
1
3
IW
IX
VAZ
VY
3
Analog Input
IW
IX
VY
VAZ
Function
CB1 protection, line protection
CB1 breaker failure
Line protection
Synchronism check