6.24
SEL-400 Series Relays Instruction Manual Date Code 20171006
Autoreclosing
Two-Circuit-Breaker Autoreclosing
E3PR1 is the SELOGIC control equation that enables three-pole autoreclose for
Circuit Breaker BK1. You can assign this setting to a control input. ESPR1 is the
SEL
OGIC control equation that enables single-pole autoreclose for Circuit
Breaker BK1. You can assign this setting to a control input.
When ESPR1 equals logical 1, the relay can attempt a single-pole autoreclose
cycle for Circuit Breaker BK1. If ESPR1 equals logical 0, the relay cannot initi-
ate a single-pole autoreclose cycle for Circuit Breaker BK1.
When E3PR1 equals logical 1, the relay can attempt a three-pole autoreclose
cycle for Circuit Breaker BK1. If E3PR1 equals logical 0, the relay goes to lock-
out following a three-pole trip for Circuit Breaker BK1 and the corresponding
leader logic transfers automatically to Circuit Breaker BK2.
E3PR2 is the SELOGIC control equation that enables three-pole autoreclose for
Circuit Breaker BK2. You can assign this setting to a control input. ESPR2 is the
SEL
OGIC control equation that enables single-pole autoreclose for Circuit
Breaker BK2. You can assign this setting to a control input.
When ESPR2 equals logical 1, the relay can attempt a single-pole autoreclose
cycle for Circuit Breaker BK2. If ESPR2 equals logical 0, the relay cannot initi-
ate a single-pole autoreclose cycle for Circuit Breaker BK2.
When E3PR2 equals logical 1, the relay can attempt a three-pole autoreclose
cycle for Circuit Breaker BK2. If E3PR2 equals logical 0, the relay goes to lock-
out following a three-pole trip for Circuit Breaker BK2.
Assert one or all SEL
OGIC control equations E3PR1, E3PR2, ESPR1, and ESPR2
according to your reclosing requirements.
For single-pole reclosing, set ESPR1 := 1 and set NSPSHOT to the desired num-
ber of single-pole reclose shots. For three-pole reclosing, set E3PR1 := 1 and set
N3PSHOT for the desired number of three-pole shots. For both single-pole and
three-pole reclosing, set ESPR1 := 1, E3PR1 := 1, and configure settings NSP-
SHOT and N3PSHOT for the desired number of reclose shots of each type (see
Recloser Mode Enables on page 6.8).
1 0 Three-pole autoreclose only enabled
1 1 Single- and three-pole autoreclose enabled
a
Only applicable to relays that support single-pole reclosing.
Table 6.22 Circuit Breaker BK2 Modes of Operation
E3PR2 ESPR2
a
a
Only applicable to relays that support single-pole reclosing.
Result
0 0 Autoreclose disabled
0 1 Single-pole autoreclose only enabled
1 0 Three-pole autoreclose only enabled
1 1 Single- and three-pole autoreclose enabled
Table 6.21 Circuit Breaker BK1 Modes of Operation (Sheet 2 of 2)
E3PR1 ESPR1
a
Result
To Next Page
Loading...
