• The Protection trip logic (SMPPTRC, 94) connects the "trip" outputs of one or more
protection functions to a common "trip" to be transmitted to SXCBR.
• The Autorecloser (SMBRREC, 79) consists of the facilities to automatically close a
tripped breaker with respect to a number of configurable conditions.
• The logical node Interlocking (SCILO, 3) provides the information to SCSWI
whether it is permitted to operate due to the switchyard topology. The interlocking
conditions are evaluated with separate logic and connected to SCILO (3).
• The Synchronism, energizing check, and synchronizing (SESRSYN, 25) calculates
and compares the voltage phasor difference from both sides of an open breaker with
predefined switching conditions (synchronism check). Also the case that one side is
dead (energizing-check) is included.
• The logical node Generic Automatic Process Control, GAPC, is an automatic
function that reduces the interaction between the operator and the system. With one
command, the operator can start a sequence that will end with a connection of a
process object (for example a line) to one of the possible busbars.
The overview of the interaction between these functions is shown in figure
86 below.
1MRK 511 286-UUS A Section 10
Control
221
Application manual
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