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32 volt yes, 32 volt auto start Kohler


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  #1  
Old 07-31-2005, 04:56:37 PM
Frank DeWitt Frank DeWitt is offline
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Default 32 volt yes, 32 volt auto start Kohler

I was at the Pioneer Gas Engine show in Marian NY yesterday and spotted a 32 volt 1500 watt Auto start Kohler Light plant, for sale.
It was in good original condition. It had the control box with the fuses on the end like a 110 DC plant and a automatic electric choke like an automatic should but it was clearly marked 32 volt DC output and 32 volt battery. There was still about 6 in of original wiring coming from the output terminals and they were big as they should be for 32 volt 1500 watt. (47 amps)

I know they made 32 volt automatic battery chargers but I have never seen a catalog item for a 32 volt auto plant let alone a real one.

Frank
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Old 07-31-2005, 07:22:30 PM
KidDynamo KidDynamo is offline
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Default Re: 32 volt yes, 32 volt auto start Kohler

As per a 1934 Kohler of Kohler Electric Plants catalog that I have:

Model D-32- Automatic Battery Charging

As many as twelve 25 watt light can be turned on without starting the plant. When current beyond 300 watts is needed, the plant starts immediately, delivering current directly from the generator, and automatically recharging the storage battery.........

Model DP-32, for marine service, is furnished with a gear pump for circulating cooling water and no radiator.

These units do have a battery made of individual cells and of a great capacity, according to the literature. The battery bank is 416 lbs for either unit unless you got the heavy duty which lists at 640 lbs.

Of course, you could use a much smaller capacity battery for "show horse" use where the battery wasn't run down by chronic low wattage use which never called on the generator to start.

Also, even though these plants were automatic start, they were classed as battery charging units. I guess the detail is that they came with a very large storage battery which was what provided the cranking voltage as well as large amp/hour storage capacity whereas the more common 110 volt d.c. automatic plants were started with a small-ish 24 or 36 volt starting battery by 110 volt d.c. minimum demand threshold but had no huge battery of 110 volts.

At first glance, the Kohler 110 vdc system seems a little weird but I guess it was a big improvement to have the high voltage output to be able to send current out a long distance without voltage drop problems but not to need a battery with that large number of cells.

Why they didn't just use a.c. is what my question would be, but maybe it was because there was a lot of 110 volt equipment available at that time ???

Sorry to digress, but I hope I at least answered your original question, to some degree.



Price list effective May 15, 1935:

D-32 1500W 32V Automatic start @ 300watts $595.00
DP-32 1500W 32V Automatic start @ 300watts (Marine) $595.00

E-36 1500W 32V Elect start, hand regulated $495.00
EP-36 1500W 32V " " " " (Marine) $495.00

There were also 2000 watt 32 vdc units listed but none were automatic start.
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Old 07-31-2005, 08:08:06 PM
Frank DeWitt Frank DeWitt is offline
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Default Re: 32 volt yes, 32 volt auto start Kohler

I think the answer to why didn't they just use AC is that 110 DC was cheaper. The DC generator with auto starting is simpler

Frank
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Old 08-01-2005, 01:50:31 AM
KidDynamo KidDynamo is offline
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Default Re: 32 volt yes, 32 volt auto start Kohler

Quote:
Originally Posted by Frank DeWitt
I think the answer to why didn't they just use AC is that 110 DC was cheaper. The DC generator with auto starting is simpler

Frank
I've got literature on them both and they don't look substantially different in design. Both are using the same battery start system, more or less. The 1A21 1500 watt a.c. full automatic plant did cost $595.00 in 1935 versus $495 for its d.c. full automatic counterpart!

Kohler was going to extract an extra hundred bucks for the privilege, in any case.
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Old 08-01-2005, 08:54:08 AM
Frank DeWitt Frank DeWitt is offline
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Default Re: 32 volt yes, 32 volt auto start Kohler

The first thing you notice about the DC model is the bell is shorter. Next you see that it has only one set of brushes.
The AC model has a extra winding on the armature and a extra set of brushes and slip rings and a extra relay.

The auto start AC was a great idea but not a easy idea.
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