Sel 411L - Page 426

P.3.318
SEL-411L Relay Protection Manual Date Code 20151029
Protection Functions
Protection Application Examples
We would have the following at Terminal R:
SID := Station R Station Identifier (40 characters)
RID := Relay R Relay Identifier (40 characters)
Both terminals are circuit breaker-and-a-half configurations. Therefore,
configure the SEL-411L for two circuit breakers.
We would have the following at both terminals:
NUMBK := 2 Number of Breakers in Scheme (1, 2)
Choose appropriate names for the circuit breakers.
BID1 := Circuit Breaker 1 Breaker 1 Identifier (40 characters)
BID2 := Circuit Breaker 2 Breaker 2 Identifier (40 characters)
Select the nominal frequency and phase rotation.
NFREQ := 60 Nominal System Frequency (50, 60 Hz)
PHROT := ABC System Phase Rotation (ABC, ACB)
Breaker Monitor (Both Stations)
Set the relay to indicate that both circuit breakers are single-pole trip type.
BK1TYP := 1 Breaker 1 Trip Type (Single-Pole = 1, Three-Pole = 3)
The SEL-411L uses normally open auxiliary contacts from the circuit
breakers to determine whether each pole is open or closed.
Breaker 1
52AA1 := IN201 A-Phase N/O Contact Input-BK1
(SEL
OGIC control equation)
52AB1 := IN202 B-Phase N/O Contact Input-BK1
(SEL
OGIC control equation)
52AC1 := IN203 C-Phase N/O Contact Input-BK1 (SEL
OGIC control equation)
Breaker 2
BK2TYP := 1 Breaker 2 Trip Type (Single-Pole = 1, Three-Pole = 3)
52AA2 := IN204 A-Phase N/O Contact Input-BK2
(SEL
OGIC control equation)
52AB2 := IN205 B-Phase N/O Contact Input-BK2
(SEL
OGIC control equation)
52AC2 := IN206 C-Phase N/O Contact Input-BK2
(SEL
OGIC control equation)
Port 87 Settings
This application uses redundant channels. Channel 1 uses direct fiber;
Channel 2 connects to a SONET network. Choose 2SD to enable redundant
channel operation.
We would have the following at both terminals:
E87CH := 2SD Enable 87L Channel (N, 2SS, 2SD, 3SS, 3SM, 2E, 3E, 4E)