1.
2.
3.
4.
5.
The Shunt Trip will not
insert completely into
the breaker.
The breaker will not trip
when control power is
applied to the Shunt Trip.
The breaker closes
manually when the Shunt
Trip with Lockout is
energized.
The breaker will not close
manually when the Shunt
Trip or Shunt Trip with
Lockout control power is
removed.
The breaker fails to close
after power is removed
from the Shunt Trip with
Lockout.
Possible Cause
The accessory is
inserted incorrectly.
The Shunt Trip is not energized.
The installed Shunt Trip has an
incorrect voltage rating.
The Shunt Trip connection is
poor.
The breaker is not closed.
The Shunt Trip with Lockout
solenoid is not energized.
The Shunt Trip with Lockout control
power connection is poor.
The
Shunt
Trip
or
Shunt Trip
with
Lockout
control power
is actually
still applied.
The breaker is already closed.
The Shunt Trip with Lockout
plunger is not retracted.
Control power was not removed
for a minimum or 0.25 second.
Corrective Action
Ensure that the accessory is inserted in the correct slot, as in
Figure 3, and that the label is upright.
Check that Shunt Trip control power is applied at greater than
75% of the rated de voltage or 55% of the rated ac voltage.
Check that the accessory is completely inserted; reinsert if
necessary.
If
a
12
Vdc
Shunt
Trip
is
installed,
check
that
the polarity of the
control
power
matches
that
shown
on
the label
of the
Shunt Trip accessory.
Check for the proper voltage rating on the Shunt Trip.
Check that the Shunt Trip accessory is completely inserted.
Check that the Trip Unit is seated correctly. If the Trip Unit
was removed to set the switches, check that it has been
correctly installed; remove and reinstall, if necessary.
Note that an otherwise unpowered Trip Unit is powered up
by an energized Shunt Trip.
Verify that the breaker is closed.
Check that the Shunt Trip with Lockout control power is
applied at greater than 75% of the rated de voltage or 55% of
the rated ac voltage. Check that the accessory is completely
inserted; re-insert if necessary.
Note that an otherwise unpowered Trip Unit is powered by an
energized Shunt Trip accessory.
Check that the Shunt Trip with Lockout accessory is completely
inserted.
Check that control power to the Shunt Trip or Shunt Trip with
Lockout has been removed.
Check that the breaker is not closed; if so, open it and try
again.
Remove the Shunt Trip with Lockout accessory. If the lockout
plunger protrudes out of the accessory, replace the accessory.
If the plunger does not protrude, reinsert the accessory,
ensuring proper alignment of the accessory in the pocket.
Wait at least 0.25 seconds before closing the breaker after
removing control power from the Shunt Trip with Lockout.
Symptom
4
1SQC930029M0201, GEH6284
December
2019
—
ABB Inc.
305 Gregson Drive
Cary, NC 27511.
electrification.us.abb.com
—
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potential errors or possible lack of
information in this document.
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contained therein. Any reproduction or
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consent of ABB Inc.
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Trouble-Shooting
The following guide is provided for troubleshooting and isolating common problems. It does not cover every possible
situation. Contact the Customer Support Center at 800-843-3742 if any problem is not resolved by these procedures.