ABB Relion 670 Series Applications Manual page 303

1MRK 511 358-UUS A
• 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
Application manual
Section 13
Control
123 below.
297