Make 2t22 DC motor driven?

[Robert Gift]

..Okay...I am going to pick this apart. You want to make either two seperate DC sirens, one DC powered 3 phase siren, or swap the motor for a single phase one.

Two separate 5-hp DC motors. One 10-hp DC would be horribly expensive. When companies opened, I learned that two 5-hp are still too terribly expensive, so I abandoned that idea.

Then the batteries, another load of money. Proper electronics to put it all together? I don't even want to know. You have your single phase idea, still a good ammount for the motor then you face possible balance or whatever possible problems exsist.

Yes. I am afraid to trade out the three-phase for the single phase motor. Even the guy selling the single phase says to keep the three-phase motor!

...battery backup for 3 phase...LOL

I may design a circuit which converts 240 DC, (from 20 12-Volt batteries in series) to three-phase 60 Hz. But there are so many unknowns and risks, since this would be a prototype. It may work at first, but what if it fails during a real tornado warning?!
If the battery idea would work, then I could charge them from 120 VAC. No digging and bringing three phase to the fire station.

.. I would say your best bet is trading up, or getting a different unit if you are not ambitious enough to dig that trench.

We have no money to trade up. I am happy to dig the trench when I can find out where the power will be.

I understand that you want to hear your baby speak for the first time, but you just will not be able to do it there.

"Lassie" already howls throughout the park from her mobile home stairway pedestal. One must go into the sewage plant laboratory shack and manually switch it on from a protected toggle switch I installed.

[Robert Gift]

Robert, I'm not trying to be an @$$hole about this but in my opinion, you have three ways to go:

You're not.
Speak your peace! This is the place to do it.
I welcome other's opinions, even if not in agreement with mine.

1. Buy a pole and plant it at the sewage treatment plant then have Xcel wire the siren up to the service for you. Your best option.

Yes, that is.
But very expensive for pole and hole.

2. Trade the 2T22 for a single phase siren. Your second best option.

Too expensive even if just for shipping. Make do with what we have.

3. Spend a crap load of money and contact the proper authorities and have the trench line marked for utilities and then dig the trench and finally lay your three phase cable. Your worst option that wouldn't render the siren useless.

Actually not that expensive and is my plan.

As far as the other two options (converting to DC or single phase motor), they would cost more than buying a single phase siren from Sentry and they would be possible killers for the 2T22.

If I manufacture good sine waves properly spaced, it should work. But I don't know what inrush would do to my heavy-amp circuitry.
That is what scares me. I may be damaging things and not knowing it.
Then when needed, it doesn't work.
Or if it does fail during a monthly test, can I fix it in time.

Number one is the smartest thing to do.

You're right. But we would prefer it be on the firehouse.
Best is for me to dig the trench and bring three-phase.
Then build my three-phase manufacturer from battery source.

[Daniel]

Maybe you should just get some air horns.

[texaschad25]

or a traffic whistle..

[CABLEVision]

Here's a link

www.wolo-mfg.com



this is a joke BTW

[Mr. Machine]

(My officers all resoundingly said, "No thanks!" when I offered to make the sewage digester our own private swimming pool.)

[Robert Gift]

Here's a link
www.wolo-mfg.com

I like the arruugaaah horn!

[CDV777-1]

Robert, I'm not trying to be an @$$hole about this but in my opinion, you have three ways to go:

1. Buy a pole and plant it at the sewage treatment plant then have Xcel wire the siren up to the service for you. Your best option.

I posted this very idea on the 1st page of this thread and here it is again about 70 posts later. Are we going in circles here or what

[Robert Gift]

1. Buy a pole and plant it at the sewage treatment plant then have Xcel wire the siren up to the service for you. Your best option.

I posted this very idea on the 1st page of this thread and here it is again about 70 posts later. Are we going in circles here or what :?: :?:

Yes.
I reply to whatever questions comments arise.

[Daniel]

I don't mean automotive air horns. I mean Cunningham Air Whistles, Kockums, Kahlenberg, and so forth. If your power supply is that unreliable, air horns will work with a low voltage valve and the compressor does not need to be three phase.