PS Magazine - TB 43-PS-607

PS, The Preventative Maintenance Monthly

ISSUE 607

JUNE 2003
PS Magazine - TB 43-PS-607 - Page 23 of 33
These new guys are pret-
ty cool, but like all kids,
they can be a bit cantanker-
ous at times. One of those
times is when the charge
on the batteries is low.
When the batteries are
low (from excessive crank-
ing and not starting and
operating the generator on
a regular basis) and in need
of a charge, operators
reach for the NATO slave
cable and get a battery
boost from their vehicle.
So far, so good. But when the slave cable is removed and the generator is started,
the 30 AMP in-line alternator fuse blows! The fuse will blow as soon as the battery
charging alternator has an opportunity to charge the batteries. According to the dig-
ital readout on the display panel, 50-60 AMPS are pulsating through that fuse. With
that much amperage, the fuse is going to do its job and blow. Then your generator
is down for the count.
Keep Extra Fuses
If you’re operating one of these new DCS TQGs, keep extra fuses, NSN 5920-
00-644-0366, on hand.
(If you are in an emergency situation, you can jump around the fuse with some
16-gauge wire. Or run a second 30 AMP fuse in parallel with the first from the pos-
itive side of the battery to the positive side of the alternator. For safety reasons, nei-
ther of these are recommended as permanent fixes, though, and the generator should
be restored to the single in-line 30 AMP fuse when the emergency has passed.)
Check for an ECP that increases the size of the wire to safely carry the full poten-
tial output of the battery charging alternator—it’s rated at 45 AMPS continuous—
and replaces the fuse with a 50 AMP slow blow circuit breaker. It also moves a wire
so the batteries won’t be drained if the fuse or circuit breaker should blow on start
up. This should permanently fix the problem.
When these new generators arrive at
your unit, bone up on the info in their
TMs. TM 9-6115-671-24P handles the
30-KW and TM 9-6115-672-24P
takes care of the 60-KW. They also
have operator’s manuals, TM 9-6115-
671-14 and TM 9-6115-672-14.
PS 607
JUNE 03
42
30-,60-KW DCS TQG…
it’s also a good idea to contact
your Logistics Assistance Office
(LAo) and get a cecom power
generation Logistics Assistant
Representative (LAR) on the job.
we LARs will know
the ins and outs of
your new generator
and can pass on
some good info.
There are some new
kids on the block when it
comes to large tactical
quiet generator (TQG)
sets. These kids are
equipped with digital
control systems (Dcs).
We’ve named these kids
the
MEP-805B (30-KW, 50/60 HZ), NSN 6115-01-461-9335;
MEP-815B (30-KW, 400 HZ), NSN 6115-01-462-0290;
MEP-806B (60-KW, 50/60 HZ), NSN 6115-01-462- 0291;
and
MEP-816B (60-KW, 400 HZ), NSN 6115-01-462-0292.
Batteries
get low
from
being
cranked
Low Batteries & Blown Fuses
607. 42-43 (C)
4/24/03
6:16 PM
Page 1
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