Schweitzer Engineering Laboratories SEL-421-4 - Page 999

6.23
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Autoreclosing
Two-Circuit-Breaker Autoreclosing
Single-Pole Trip Circuit Breakers
The initial settings necessary to enable autoreclose for two single-pole trip circuit
breakers are shown in Table 6.20.
Recloser Mode Enables
The SELOGIC control equations E3PRn and ESPRn set the relay for the three
autoreclose modes. Table 6.2 1 and Table 6.22 illustrate how to enable the autore-
close modes per circuit breaker.
Table 6.19 Two-Circuit-Breaker Three-Pole Reclose Initial Settings
Setting Description Entry
NUMBK Number of Breakers in Scheme 2
Breaker Configuration (Breaker Monitor)
BK1TYP
a
a
Only applicable to products that support single-pole tripping and reclosing.
Breaker 1 Trip Type 3
BK2TYP
a
Breaker 2 Trip Type 3
Breaker 1 Inputs (Breaker Monitor)
52AA1 N/O Contact Input—BK1 (SELOGIC Equation) IN101
Breaker 2 Inputs (Breaker Monitor)
52AA2 N/O Contact Input—BK2 (SELOGIC Equation) IN102
Relay Configuration (Group)
E79 Reclosing Y or Y1
Table 6.20 Two-Circuit-Breaker Single-Pole Reclose Initial Settings
Setting Description Entry
NUMBK Number of Breakers in Scheme 2
Breaker Configuration (Breaker Monitor)
BK1TYP Breaker 1 Trip Type 1
BK2TYP Breaker 2 Trip Type 1
Breaker 1 Inputs (Breaker Monitor)
52AA1 A-Phase N/O Contact Input—BK1 (SELOGIC Equation) IN101
52AB1 B-Phase N/O Contact Input—BK1 (SEL
OGIC Equation) IN102
52AC1 C-Phase N/O Contact Input—BK1 (SEL
OGIC Equation) IN103
Breaker 2 Inputs (Breaker Monitor)
52AA2 A-Phase N/O Contact Input—BK2 (SELOGIC Equation) IN104
52AB2 B-Phase N/O Contact Input—BK2 (SEL
OGIC Equation) IN105
52AC2 C-Phase N/O Contact Input—BK2 (SEL
OGIC Equation) IN106
Relay Configuration (Group)
E79 Reclosing Y or Y1
Table 6.21 Circuit Breaker BK1 Modes of Operation (Sheet 1 of 2)
E3PR1 ESPR1
a
Result
0 0 Autoreclose disabled
0 1 Single-pole autoreclose only enabled