9.2
Three-state disconnector control P3SXSWI (ANSI
29DS/GS)
9.2.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-state disconnector control
P3SXSWI
I<->O P3S
29DS/GS
9.2.2
Function block
Figure 831: Function block
9.2.3
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.
Control functions
1MRS759142 F
1520
REX640
Technical Manual