6.17
Date Code 20060320 Instruction Manual SEL-311C Relay
Close and Reclose Logic
Reclosing Relay
When the shot counter is at a particular shot value (e.g., shot = 2), the
corresponding Relay Word bit asserts to logical 1 (e.g., SH2 = logical 1).
Reclosing Relay
SELOGIC Control
Equation Settings
Overview
These example settings are discussed in detail in the remainder of this
subsection.
Reclose Initiate and
Reclose Initiate
Supervision Settings
(79RI and 79RIS,
Respectively)
The reclose initiate setting 79RI is a rising-edge detect setting. The reclose
initiate supervision setting 79RIS supervises setting 79RI. When setting 79RI
senses a rising edge (logical 0 to logical 1 transition), setting 79RIS has to be
at logical 1 (79RIS = logical 1) in order for open interval timing to be initiated.
If 79RIS = logical 0 when setting 79RI senses a rising edge (logical 0 to
logical 1 transition), the relay goes to the Lockout State.
Settings Example
With settings:
79RI = TRIP
79RIS = 52A + 79CY
the transition of the TRIP Relay Word bit from logical 0 to logical 1 initiates
open interval timing only if the 52A + 79CY Relay Word bit is at logical 1
(52A = logical 1, or 79CY = logical 1). Input IN101 is assigned as the breaker
status input in the factory settings (52A = IN101).
Table 6.4 Shot Counter Correspondence
to Relay Word Bits and Open Interval Times
Shot
Corresponding
Relay Word Bit
Corresponding Open Interval
0 SH0 79OI1
1 SH1 79OI2
2 SH2 79OI3
3 SH3 79OI4
4SH4
Table 6.5 Reclosing Relay SELOGIC Control Equation Settings Example
SELOGIC Control
Equation Setting
Setting Definition
79RI TRIP Reclose Initiate
79RIS 52A + 79CY Reclose Initiate Supervision
79DTL !IN102 + LB3 Drive-to-Lockout
79DLS 79LO Drive-to-Last Shot
79SKP 0 Skip Shot
79STL TRIP Stall Open Interval Timing
79BRS 0 Block Reset Timing
79SEQ 0 Sequence Coordination
79CLS 1 Reclose Supervision
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