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Delco and other Low Voltage DC Light Plants Antique Generators, Light Plants, Typically 24, 32 or 48 volt although some are 110 volt. DC Lamps, Motors and appliances.

Delco and other Low Voltage DC Light Plants

Delco 600 Overkill


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  #1  
Old 11-11-2018, 10:48:33 PM
Mobile Mechanic Mobile Mechanic is offline
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Default Delco 600 Overkill

Well I got the thing to run and run really well... And I see 10amps on the meter and 50 some vdc being crammed into the three 12 volt batteries, is there some way to dial it down? I watch half waiting for the acid to boil out and the battery to melt and catch fire that the amps did come down as they did get charged up but I know that is got to me too much output.. any thoughts to back off the power
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Old 11-12-2018, 10:58:41 AM
Zephyr7 Zephyr7 is offline
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Default Re: Delco 600 Overkill

Do you have a variable resistor in regulator circuit, or a “high voltage” cutout relay?
About 42v is as high as you should go charging a series string of three 12v batteries. More is likely to boil off electrolyte as you state.

Bill
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Old 11-12-2018, 01:17:03 PM
Vanman Vanman is offline
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Default Re: Delco 600 Overkill

I don"t think those engines have a governor? Instead they're designed to shuf down at around 40 volts (for a 16 cell, 32 volt nominal battery). Sounds like fhat component is either missing or not working.

Alternatively, you could apply enough load to keep the voltage down and allow the set to run as long as you like.
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Old 11-12-2018, 02:26:14 PM
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Mike Schweikert Mike Schweikert is offline
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Default Re: Delco 600 Overkill

Another thing to consider; is that these were primarily for charging the battery bank, once it was run down. For example, the only time you would run this is when you used an electric motor, or iron. They had enough draw to nearly match what it was putting out. Sometimes it would get run only once a week depending on how much battery was used for lighting.

Try a resistive load on the line side, and see what it does....
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Old 11-13-2018, 05:35:43 AM
Mobile Mechanic Mobile Mechanic is offline
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Thumbs up Re: Delco 600 Overkill

Thanks folks I can look into all options.. I have not found anything in the wire diagram for any kind of or resister.. I do know the manual self start thing can be a pain.. but I enjoy it never the less.. I do have an old porcelain screw in heater which should make the thing tone down.. perhaps that might have to be installed.. now for the million dollar question.. on the battery side or the line side.. currently the set up is just the batteries.. thoughts?

---------- Post added at 04:35:43 AM ---------- Previous post was at 04:32:30 AM ----------

Sorry just reread the replys.. I can wire in that heater on the line side and see what happens..
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Old 11-13-2018, 07:41:15 PM
netpirate8 netpirate8 is offline
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Default Re: Delco 600 Overkill

your problem is running 3 12v batteries on a 32v system. Remove 1 12v battery and replace with an 8v battery. You will find that your charge voltage going into the batteries will drop drastically. Usually around 38-42 volts. Thus solving your problem. TSC/rural king has choices on the necessary 8v battery. DELCO'S WERE NOT DESIGNED TO RUN ON 36VOLTS. Running on 36v will also effect the RPM of your unit. Hope this helps.
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Old 11-13-2018, 08:10:13 PM
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Default Re: Delco 600 Overkill

That thought has crossed my mind as well.. where I use the same battery set up for the other Delcos.. system voltage charging has been right where it is supposed to be.. I can always adjust the batteries. Not too big a deal..just wondering if the biggest difference between the two plants is one is made for just battery and load requirements and not automatic charging.. but in all honesty 32 volt should be kept as much as possible.. I will test all ideas this weekend and report back.. I still have a hunch that the plant will still have high output..I am always thankful for other ideas that may of just looked through..
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Old 11-13-2018, 10:53:59 PM
Zephyr7 Zephyr7 is offline
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Default Re: Delco 600 Overkill

If you have a mix of *cell* sizes (not battery), youíll get uneven charging and will over or under charge some of the cells. You need all the cells in the string to be the same amphour capacity. If you have a 12v battery (6 cells) and an 8v battery (4 cells), you need all the individual cells to the the same capacity (amphours) so that the rate of charge is even across all of them.

The same goes for cell chemistry. Donít mix SLA and AGM battery chemistries, for example.

Best would be to use a string of four of the 8v batteries and not mix different batteries in the same string.

Bill
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Old 11-18-2018, 11:19:48 AM
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Default Re: Delco 600 Overkill

And the results are in.. .. after much consideration the winners and losers are as follows. After adding the porcelain screw in heater the amps went up voltage remaining the same. After swapping in 8 volt battery to reduce total line voltage to 32.. no screw in heater voltage stayed the same..I have one more random idea..and I will report back when I know..
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Old 11-18-2018, 05:39:44 PM
Vanman Vanman is offline
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Default Re: Delco 600 Overkill

One thing to consider, if your screw in heater is 120 volt, it will take considerably less power at ~40 volts.

I'm guessing that the generator is 600 watt, based on the model number. At 40 volts, this is 15 amps. It would take several 120 volt screw in heaters to reach that current at 40 volts. Like nine of them if they are 600 watt heaters!
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Old 11-18-2018, 06:09:51 PM
Zephyr7 Zephyr7 is offline
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Default Re: Delco 600 Overkill

A 120v heater running at 40v will only pull about 11% of it’s rated wattage.

Bill
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Old 11-18-2018, 08:06:05 PM
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Default Re: Delco 600 Overkill

Ok after much wrench time a few brews and some help from a buddy.. this is what I have come up with.. hang on here we go. I dismantled the Gen unit of the 600 and looked at the pole shoes and made a note of the resistance on the shoes all four.. I then pulled the Gen unit from the 752 and the 8C3 as well and made some more resistance tests along with induction tests. I only came to this idea because in one of my books on the 8c3 and 752 units Delco had given an updated set of pole shoes for replacement in the feild... Guess which set I found lurking in my 600 watt unit.. a set from an 8C3 800 watt unit right down to the acme wire tags and resistance values.. So how does this change things.. the combo light plants have a automatic throttle to control speed and amps.. the 600 does not.. I will post the note for the updated feild poles for others to ponder..
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Old 11-26-2018, 05:26:12 AM
Mobile Mechanic Mobile Mechanic is offline
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Default Re: Delco 600 Overkill

Hopefully the picture uploaded.. anyhow, hope the holidays treated everyone good.. after much debate and lots of wrench time I have found that my current normal operating voltage for that engine is going to be just a little bit higher because of the new pole shoes inside. I have put in a screw in heater in line with the batteries in order to reduce the voltage down it is just a little blip but it does make it much more manageable please also remember that with the 600 series of light plants there is no automatic shutdown it has to manually be shut down there is no drop off once the battery set of predetermined value it will keep going until everything boils out I've got more information on that which I will upload as soon as I get a chance to thanks guys for all of your help and I got an early Christmas present there just so happens to be an 850 sitting in the shop now more on that later thanks for all of you guys as input
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  #14  
Old 11-26-2018, 10:30:47 AM
Zephyr7 Zephyr7 is offline
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Default Re: Delco 600 Overkill

If youíre handy with a soldering iron, an LM393 comparator chip, a zener diode, a transistor and some resistors will let you make a voltage level sensor you could use to trigger a relay when you reach some set cutoff voltage. You can build your own voltage sensitive auto shutdown this way. The circuit is in the datasheets for the chip, or if youíre interested I can sketch it for you and post it here. Easy and cheap.

Bill
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