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VK2TV > WANTED 16.05.08 06:39l 58 Lines 2434 Bytes #999 (0) @ WW
BID : 41077_VK2TV
Read: GUEST
Subj: Re:Alternative power source - QTH
Path: DB0FHN<DB0RGB<DB0PM<OE5XBL<OE6XPE<DB0RES<DK0WUE<7M3TJZ<F6CDD<F6BVP<
VK2TV
Sent: 080516/0430Z @:VK2TV.#MNC.NSW.AUS.OC #:37876 [Kempsey, QF68JX] $:41077_VK
From: VK2TV@VK2TV.#MNC.NSW.AUS.OC
To : WANTED@WW
# Generated by: TstHWin v2.21b - Registered to VK2TV
# On : 5/16/2008 14:29:27
# UTC: 5/16/2008 4:29:27 A
]
>From: ZS1DJ@ZS0STB.TBG.WCP.ZAF.AF
>To : WANTED@WWW
Hi Eldred,
>
>Hi there
>
>A few weeks ago, someone asked for info in setting up a generator, in the
>home QTH wiring system, that would come alive, when the electricity was
>cut due to power shedding etc.
>I do recall, there were interesting replies, as to how one should go about
> implementing the alternative power source, when the "main" power source
>failed. (I think there were relays, power limiting devices, switches and
>or trips, that would kick in, if the power generated, exceeded 220 volts).
>I was captured by the talks that were exchanged, but sadly, I did not take
>note of the people's callsigns that discussed this matter.
>I so want to know who these people are, as I would like to try and pull
>these messages back to life (that's if those messages are still available
>on the BBS).
>I'm seriously interested in providing an alternative power source into the
>QTH, and would like to read up on the problem areas, those fellas
>experienced, and how they were over come.
I once worked for an electricity supply authority and we had a 5kva air
cooled Honda diesel backup plant to supply our control room in the event of
a power outage (we weren't immune!).
The genset supplied only the control room, and the circuits to the control
room were arranged to be isolated from the rest of the building. The
control box contained a changeover contactor (large relay for those not in
the trade) whose coil looked at the supply for the remainder of the
building. When supply failed the genset would autostart and the now
de-energised relay would steer generator output to the control room
circuit. When supply was restored the coil would once again energise,
change the control room to mains supply, and turn off the genset.
The electrical regulations affecting the use of stand-by power plants is,
I'm sure, different in every country. All of Australia and New Zealand come
under AS/NZ3000, a book known as the Wiring Rules. The installation of
stand-by plants is controlled by both AS/NZ3000 and the local electricity
supply authority, and installations must be in accordance with the rules.
You may want to check with your local authority to see what they require,
if anything.
Cheers ... Ray vk2tv
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