ABB RELION RET670, Applications Manual

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• The Switch controller (SCSWI) initializes all operations for one apparatus. It is the
command interface of the apparatus. It includes the position reporting 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 Reservation (QCRSV) deals with the reservation function.
• 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 Generic Automatic Process Control function, GAPC, handles generic
commands from the operator to the system.
The overview of the interaction between these functions is shown in Figure 322 below.
1MRK 504 163-UUS A
Section 15
Control
Transformer protection RET670 2.2 ANSI 711
Application manual