ABB REL650 Applications Manual page 349

1MRK 506 334-UUS A
Application manual
• The Switch controller (SCSWI) initializes all operations for one apparatus and
performs the actual switching and is more or less the interface to the drive of one
apparatus. It includes the position handling as well as the control of the position.
• The Circuit breaker (SXCBR) is the process interface to the circuit breaker for the
apparatus control function.
• The Circuit switch (SXSWI) is the process interface to the disconnector or the
grounding switch for the apparatus control function.
• The Bay control (QCBAY) fulfils the bay-level functions for the apparatuses, such as
operator place selection and blockings for the complete bay.
• The function (SELGGIO), deals with reservation of the bay.
• The Four step overcurrent protection (OC4PTOC, 51/67) trips the breaker.
• 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
Section 11
Control
150 below.
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