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A.9.2
Pre-Defined CFC Charts
Device and System
Logic
IN: Device,
General SP
IN: Control Device
GndSwit. DP
IN: Device,
52 Breaker DP
IN: Data 2 Relay
TRIP OUT
Figure A-44
Device and System Logic
Set points
IN: Set points 37-1 LV
IN: Measurement Ia = MV
IN: Set points 37-1 LV
IN: Measurement Ib = MV
IN: Set points 37-1 LV
IN: Measurement Ic = MV
Figure A-45 Undercurrent monitoring
7SJ63 Manual
C53000-G1140-C120-1
Some CFC Charts are already supplied with the SIPROTEC
Using modules on the running sequence "measured value processing", a low current
monitor for the three phase currents is implemented. The output message is set high
as soon as one of the three phase currents falls below the set threshold:
®
device:
OUT: Control Device Block Data IntSP
OUT: Device, General Feeder gnd IntSP
OUT: Device, General Brk OPENEDIntSP
OUT: Set points SP. 37-1
alarm OUT
Appendix
:
A-101
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