Schweitzer Engineering SEL-351P - Page 298

6-4 Close and Reclose Logic Date Code 990215
SEL-351P Manual Técnico
then if breaker status is used in other SEL OGIC Control Equations, it can be entered as 52A – the
user does not have to enter IN101 (for a 52a) or !IN101 (for a 52b). For example, refer to
Rotating Default Display in Section 7: Inputs, Outputs, Timers, and Other Control Logic. In
the factory settings, circuit breaker status indication is controlled by display point setting DP2:
DP2 = IN101
This can be entered instead as:
DP2 = 52A
(presuming SEL
OGIC Control Equation setting 52A = IN101 is made).
Program an Output for Closing
The final trip/close logic in Figure 7.29 (that has input from
Figure SECTION 6: .1) controls
dedicated trip and close output contacts.
See Output Contacts in Section 7: Inputs, Outputs, Timers, and Other Control Logic for more
information on programming additional output contacts.
R ECLOSE S UPERVISION L OGIC
Note that one of the inputs into the close logic in Figure SECTION 6: .1 is:
Reclosing Relay Open Interval Time-Out (qualified by 79CLS)
This input into the close logic in
Figure SECTION 6: .1 is the indication that a reclosing relay
open interval has timed out (see
Figure SECTION 6: .6), a qualifying condition (SEL OGIC
Control Equation setting 79CLS) has been met, and thus, automatic reclosing of the circuit
breaker should proceed by asserting the CLOSE Relay Word bit to logical 1. This input into the
close logic in
Figure SECTION 6: .1 is an output of the reclose supervision logic in the
following
Figure SECTION 6: .2.