Functionality - ABB RELION REX640 Technical Manual

Section 9
Control functions
9.2.3
9.2.4
1364

Functionality

The three-state disconnector control function P3SXSWI is used to control a three-
state switch (disconnector closed, both open, earthing switch closed) and to provide
status information on the MV air-insulated switchgear (AIS) and gas-insulated
switchgear (GIS). P3SXSWI executes commands to RIO600 SCM or directly drives
the switchgear motor by direct control of the protection relay's H-bridge (if available).
The function evaluates blocking conditions and different supervision conditions and
it performs an execution command only if all conditions are fulfilled. If erroneous
conditions occur, the function indicates an appropriate cause value. The function is
designed according to the IEC 61850-7-4 standard including logical nodes CILO,
CSWI and XSWI.
P3SXSWI has operation counters for disconnector operation and earthing switch
operation. The counter values can be read and written remotely from the place of
operation or via LHMI.
The function can also be configured to handle only two-position switches (earthing
switch or disconnector).
Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "on" and "off".
The switch type is determined depending on the connected inputs in Application
Configuration.
• If inputs DCPOSOPEN, DCPOSCLOSE, ESPOSOPEN and ESPOSCLOSE are
connected, the switch type is three-position switch.
• When only inputs DCPOSOPEN and DCPOSCLOSE are connected, the switch
type is disconnector.
• When only inputs ESPOSOPEN and ESPOSCLOSE are connected, the switch
type is earthing switch.
Any other connection leads to a configuration error.
The motor control application of the three-position switch can be selected with
parameter setting Control mode. If "With RIO600 SCM" is selected, the motor control
is handled externally by the RIO600 SCM module; the protection relay only
supervises the switch position and interlocking but provides commands to RIO600. If
"Direct control" is selected, the motor control is handled by the protection relay's H-
bridge and no external RIO600 SCM device is needed.
Position indication and validity check
Depending on the switch type connection, a three-position switch, disconnector or
earthing switch can be configured.
1MRS759142 C
REX640
Technical Manual