PS Magazine - TB 43-PS-578
PS, The Preventative Maintenance Monthly
ISSUE 578
JANUARY 2001
PS 578
50
JAN 01
t’s late, it’s dark and you’re beat. But you’ve got a job to do. You’ve got to
make the cable connections on your AN/TTC-47C(V)1 node center switch.
Your job is to connect the cables from the operations shelter’s signal entry
panel (SEP) to the switching shelter SEP.
But all you want to do is knock off a few
Z-Z-Z-Z
s. So you hurry and, in your
haste, you knock off a few lugs instead.
The lugs are on the connectors on the switching shelter’s roadside and curbside
SEP. The lugs match keyways on your cable connectors. When in place, they
give you the path to make the connection without damaging pins and then help
lock the connector down.
When you ram a connector on with-
out matching the lugs to the keyways,
you break off the lugs. Then you’ve
lost your path and the security for your
connection.
So protect the path. When you make
the connections, take your time. And
use a flashlight at night. If your buddy makes the connections, make sure he has
done it before and knows about the lugs.
If a lug is damaged or missing, get your support to replace the receptacle.
AN/TTC-47C(V)1 Switching Shelter . . .
uh-oh!
that's
not
good
!
5-,10-KW TQG . . .
Make sure DC breaker is open
1
once you've
discovered the leak,
get your ds to
check
the
diode pack
and
replace it
, if
necessary.
51
JAN 01
Careless connecting damages lugs
A reading below 5 milliamps is OK.
Above that and you’ve got a leak
problem.
Chances are the problem stems
from the diode pack, NSN 5961-01-
331-3974 or NSN 5961-01-330-7886,
in the battery charging alternator,
NSN 6115-01-368-2911.
Disconnect negative cable
Put leads between clamp and
negative and measure for DC amps
3
2
re you going through batteries
on your 5- and 10-KW tactical quiet
generators like food through a goose?
There’s a good chance that batteries
are dying because current is leaking
out through the battery charging alter-
nator circuit.
Do this test:
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