Auto Bypass; Single-Line Circuit Diagram - ABB ACS580MV Hardware Manual

Auto Bypass

Single-line circuit diagram


In this case, the isolation switches are typically replaced by contactors, the high voltage
vacuum contactor is a reasonable solution in pricewise comparing with breakers.
The diagram below describes the single diagram of auto bypass with contactor(x3).
There are three contactors in bypass cabinet, the cabinet is in-line with ACS580MV. KM1
and KM2 are both electrically interlocked with KM3, they cannot be closed at the same
time.
There is a switch on the front door of bypass cabinet, 3 control modes can be selected:
local mode stop mode and remote mode. In local mode, three contactors can be operated
manually with corresponding switches on the front door. In remote mode, three contactors
can only be controlled by DCS. In stop mode, three contactors can't be operated any
more.
Operation principle and hardware description 23
LED
Lamp1,2: QF1 open/close Lamp3,4: KM1 open/close
Lamp5,6: KM2 open/close Lamp7,8: KM3 open/close
Lamp9: VFD mode Lamp10: Bypass mode
Lamp11: Aux. supply
3 4
KM1
ACS580MV
5 6
KM2
electrical interlock
M
9
1 2
QF1
7 8
KM3
10 11