Mounting And Wiring The Shunt Trip - ABB VersaRupter Installation, Operation And Maintanance Manual

Mounting and Wiring the Shunt Trip

The shunt trip can only be installed on the A-
mechanism. Shunt trip coils are intermittent duty
which require an auxiliary contact to be wired in se-
ries with the shunt trip. The auxiliary switch will
open the shunt trip circuit when the VersaRupter
opens. Refer to Auxiliary Switch installation for more
details.
1. Ensure that the A-mechanism is not pre charged
prior to installing the shunt trip. The mechanism
should appear as it does in figure 4. If not, ro-
tate the shaft counter clockwise to release the
spring then return the shaft to its neutral posi-
tion.
2. Locate the mounting holes in the A-mechanism
for the shunt trip shown in figure 5. Loosely in-
stall a bolt, lock washer, and nut into the lower
hole allowing the shunt trip to rest on the A-
mechanism as shown in figure 6.
3. Place the white disk on the half-moon shaft locat-
ed on the operating shaft side of the A-
mechanism. Place the shunt trip linkage between
the white disk and A-mechanism and mark the
hole that will provide the maximum rotation of
the white disk if the linkage is pulled. An exam-
ple is shown in figure 7.
Figure 5
Figure 6
Figure 7
VersaRupter MV Indoor Switch | Installation and Operation Manual
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