P.4.9
Date Code 20151029 Protection Manual SEL-411L Relay
Autoreclosing and Synchronism-Check
One-Circuit-Breaker Autoreclosing
E3PR1 is the SELOGIC control equation that enables three-pole autoreclose
for Circuit Breaker 1. You can assign this setting to a control input. When
E3PR1 equals logical 1, the relay can attempt a three-pole autoreclose cycle
for Circuit Breaker 1. If E3PR1 equals logical 0, the relay goes to lockout
following a three-pole trip for Circuit Breaker 1.
ESPR1 is the SEL
OGIC control equation that enables single-pole autoreclose
for Circuit Breaker 1. 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 1. If ESPR1 equals logical 0, the relay cannot initiate a
single-pole autoreclose cycle.
Set either or both E3PR1 and ESPR1 according to your reclosing
requirements. For single-pole reclosing, set ESPR1 to evaluate to logical 1 and
set NSPSHOT to the number of single-pole reclose shots you want. For three-
pole reclosing, set E3PR1 to evaluate to logical 1 and set N3PSHOT for the
number of three-pole shots you want. For both single-pole and three-pole
reclosing, set ESPR1 to evaluate to logical 1, set E3PR1 to evaluate to logical
1, and configure settings NSPSHOT and N3PSHOT for the number of reclose
shots of each type that you want (see Recloser Mode Enables).
Trip Logic and
Reclose Sources
Internal Recloser
Program the recloser function to drive the trip logic with Relay Word bits
R3PTE (Recloser Three-Pole Trip Enable) and R3PTE1 (Recloser 3-pole trip
enable Circuit Breaker 1) as follows:
E3PT := R3PTE Three-Pole Trip Enable (SELOGIC Equation)
E3PT1 := R3PTE1 Breaker 1 3PT (SELOGIC Equation)
These settings connect the internal relay recloser for both three-pole reclosing
and single-pole reclosing. Enter enable settings ESPR1 and E3PR1 as
appropriate for your application.
The relay is a single-pole tripping relay; if E3PT and E3PT1 are logical 0, the
relay is enabled for single-pole tripping. Conversely, if E3PT and E3PT1 are
logical 1, the relay is enabled for three-pole tripping only.
Relay Word bits R3PTE and R3PTE1 are logical 1 for any of the following
conditions when the setting NUMBK (Number of Breakers in Scheme) is
logical 1 and SPLSHT (Single-Pole Last Shot) is asserted (see Figure 4.8).
➤ BK1TYP := 3, (Breaker 1 Trip Type)
➤ NSPSHOT := N, (Number of Single-Pole Reclosures)
External Recloser
If reclosing is performed by an external relay, assert SELOGIC control
equations E3PT and E3PT1 via a control input (for example):
E3PT := NOT IN204 Three-Pole Trip Enable (SELOGIC Equation)
E3PT1 := NOT IN204 Breaker 1 3PT (SELOGIC Equation)
Connect the external recloser single-pole trip output signal to IN204. Other
external recloser signals are required; consult the external recloser
documentation for interconnection with the relay.
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