Switch Control - ABB Relion 630 Series Engineering Manual

Section 5
Protection and control engineering
5.4.4
74

Switch control

The Switch controller, GNRLCSWI, 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.
GNRLCSWI initializes and supervises all functions to properly select and operate
primary switching devices.
After the selection of an apparatus and before the execution, the switch controller
performs the following checks and actions:
• A request initiates to reserve other bays to prevent simultaneous operation.
• Actual position inputs for interlocking information are read and evaluated if the
operation is permitted.
• The synchrocheck/synchronizing conditions are read and checked, and performs
operation upon positive response.
• The blocking conditions are evaluated.
• The position indications are evaluated according to given command and its
requested direction (open or closed).
At error, the command sequence is cancelled.
An apparatus can be controlled (open/close) with the help of GNRLCSWI function in
the following different ways:
• By using local automation function that is, AU_OPEN, and AU_CLOSE inputs
• From the Local panel L_SEL, L_OPEN and L_CLOSE inputs
• Directly by selecting the apparatus from the Display page and using Open/Close
button available on LHMI.
When local automation functions are used for opening or closing operation the
opening and closing command from such local automation should be connected to
AU_OPEN and AU_CLOSE input of the GNRLCSWI function. GNRLCSWI
evaluates whether the condition for opening or closing are fulfilled and the operation
is performed.
Similarly, if local panel is used for opening or closing operation, the inputs which deal
with opening and closing are connected to L_OPEN and L_CLOSE respectively.
However, with this mode of control it is required that before performing any operation
the local select input L_SEL is activated. Activation of only L_OPEN or L_CLOSE
will not result into opening or closing of apparatus. L_SEL is first activated and then
L_OPEN is activated for performing opening operation, Similarly, L_SEL is first
activated and then L_CLOSE is activated for performing closing operation.
The switch controller GNRLCSWI works in conjunction with the synchrocheck and
synchronizing function SYNCRSYN. It is assumed that the synchrocheck function
operates continuously and activates the SYNC_OK signal when all synchronizing
conditions are satisfied to the switch controller GNRLCSWI. The result from the
synchrocheck function is evaluated during the close execution. If the operator
1MRS756800 F
630 series
Engineering Manual