Effective June 2009
Instructional Leaflet
IL2C12769H07
Remote latch check switch (LCS) for
Magnum low voltage circuit breakers
warning
(1) Only qualified electrical persOnnel shOuld
be permitted tO wOrk On the equipment.
(2) always de-energize primary and
secOndary circuits if a circuit breaker
cannOt be remOved tO a safe wOrk lOcatiOn.
(3) drawOut circuit breakers shOuld be
levered (racked) Out tO the discOnnect
pOsitiOn.
(4) all circuit breakers shOuld be switched
tO the Off pOsitiOn and mechanism springs
discharged.
failure tO fOllOw these steps fOr all
prOcedures described in this instructiOn
leaflet cOuld result in death, bOdily injury,
Or prOperty damage.
Section 1: General information
A latch check switch (LCS) indicates when the
circuit breaker is “ready to close” (
Figure 1
). The
internal version of the LCS is wired to the spring
release. It will not permit activation of the spring
release until the circuit breaker is fully charged and
the trip latch is reset.
Required tools
•
1/4-inch drive socket
•
10 mm socket
Kit parts identification
Refer to
Figure 1
for visual identification of the
contents of kit.
Figure 1. Contents of Kit
Section 2: Installation of internal
remote LCS
To install the LCS, proceed with the following
six steps:
Step 1:
Remove the front cover by unscrewing
the hex head captive bolts (four for three-pole,
six for four-pole) that join the cover to the breaker
housing using a 10 mm 1/4-inch drive socket.
Then hold the charge handle down at about a
45-degree angle to pull off the cover.
Figure 2. Step 1
LCS (internal
version shown)
Mounting Bolts
