Message-ID: <4E934CE4.7090606@iup.uni-heidelberg.de>
Date: Mon, 10 Oct 2011 21:52:04 +0200
From: =?UTF-8?B?U3RlZmFuIFNjaMOkZmVy?= <Stefan.Schaefer@iup.uni-heidelberg.de>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
MIME-Version: 1.0
To: rsgb_lf_group@blacksheep.org
References: <20111010.114840.1660.0.riese-k3djc@juno.com> <008701cc876a$9d6ab140$0401a8c0@xphd97xgq27nyf> <4E934AC0.8050501@iup.uni-heidelberg.de>
In-Reply-To: <4E934AC0.8050501@iup.uni-heidelberg.de>
Subject: Re: LF: mains wires
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: quoted-printable
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
X-AOL-SCOLL-URL_COUNT: 0  
x-aol-sid: 3039ac1db4054e934d4f2c1b
X-AOL-IP: 195.171.43.25
X-AOL-SPF: domain : blacksheep.org SPF : none


Ah BTW, here all the power distribution up to 20 kV is below the ground,=20
i.e. in cables, since the 60's. Some over-land wires are still existing=20
in the country-side though. In Berlin, they even use short (some km)=20
400kV cables to bring the electricity in the center of the city. In the=20
cities you don't find any cables at all above ground.

73, Stefan


Am 10.10.2011 21:42, schrieb Stefan Sch=C3=A4fer:
> In Germany we all have a 3 phase 400 VAC system in our houses. Usually=20
> the kitchen oven and/or continuous flow water heaters are connected to=20
> a 3 phase system (the water heater is rated at 3x35 A, i.e. 20 kW).=20
> There is a 120 deg phase shift between the hot wires (black, black,=20
> brown), a neutral (blue) and protection earth (green-yellow). So in a=20
> symmetric 3 phase load (like a motor or the water heater) the current=20
> in the neutral conductor becomes 0. A usual power socket is rated at=20
> 16A, i.e. a single phase radio amateurs home PA can have up to 3.5 kW :=
-)
> If a 3 phase system is rectified for a PA, there is no voltage-0, so=20
> smaller caps can be choosen. Also the times between the amplitudes are=20
> reduces to 20ms/6=3D3.333 ms.
>
> Voltage levels are 230/400V, 20kV, 110kV, 220kV and 400kV. Some old=20
> systems at 10kV and 30kV or 6kV for industial motors are still=20
> existing...
> Rated current of a 400kV system is 3.15 kA.
>
> OT but Interesting differences in the countries.
>
> 73, Stefan/DK7FC
>
>
> Am 10.10.2011 18:35, schrieb mal hamilton:
>> Hi Bob
>> The normal mains supply to houses and offices is 230 volts ac at 60=20
>> amps. 50
>> Hz. For large industrial machines in factories they would normally=20
>> have a 3
>> phase 440volt AC/50 Hz supply.
>> Some private properties do have a 3 phase supply if required for small
>> garage industries or hobbies like lathes etc
>> The normal houshold 230v appliance cord/lead is BROWN LIVE, BLUE=20
>> NEUTRAL and
>> GREEN/YELLOW EARTH.
>> Some appliances like hoover carpet cleaners, plastic encased have 2=20
>> wires ie
>> BROWN LIVE, BLUE NEUTRAL and no earth.
>> The plug to the mains socket is clearly marked when you make a cord/le=
ad
>> connection so the wires do not get crossed over and the plug is non
>> reversible.
>> The 3 pin plug contains a fuse always in/to the live pin.
>>   It is a straight forward safe procedure avoiding crossed Live and=20
>> Neutral
>> wires.
>> In EU the supply is normally 220 v but might vary in different=20
>> countries.
>> De mal/g3kev
>>
>>
>> ----- Original Message -----
>> From:<riese-k3djc@juno.com>
>> To:<rsgb_lf_group@blacksheep.org>
>> Sent: Monday, October 10, 2011 3:15 PM
>> Subject: Re: LF: mains wires
>>
>>
>>> in the US we have a standard of 120/240
>>> with the 120 as the appliance voltage
>>> the British and others use 220 for a standard
>>> does that mean that 440 is used for the big power draws
>>> we would place our clothes dryers on 220 do you have 440
>>> in general use in the home
>>>
>>> Bob K3DJC
>>>
>>> On Sun, 09 Oct 2011 22:44:20 -0400 Elton A=20
>>> Sanders<radiodog77@pobox.com>
>>> writes:
>>>> If it was plugged into US 230v both Black and White would be hot.
>>>> Mains
>>>> feed here is 2 hots and Neutral hot to Neutral 115v hot to hot 230v
>>>>
>>>> (feed is from a center tapped transformer on the pole).
>>>>        WB5MMB
>>>>
>>>>
>>>> On Mon, 10 Oct 2011 01:25:02 -0000, mal hamilton wrote:
>>>>> Bob
>>>>> If you look at a Dentron 2500 amplifier on the cct diagram the
>>>> 230v
>>>>> mains cable, WHITE wire goes to the ON/OFF switch on amplifier
>>>> then
>>>>> primary of HT transformer which to me is HOT and BLACK wire goes
>>>>> directly to the other side of primary winding, NEUTRAL and GREEN
>>>> to
>>>>> chassis.
>>>>> In the UK the switch is always in the LIVE (hot) wire and NEUTRAL
>>>>> direct to the appliance except it happens to be a double switch.
>>>>>
>>>>> UK appliance BROWN live, BLUE neutral, plus an earth wire (3 wire
>>>>> appliance)
>>>>> mal/g3kev
>>>>>
>>>>>> ----- Original Message -----
>>>>>>
>>>>>> Sunday, October 09, 2011 7:48 PM
>>>>>> Re: LF: mains wires
>>>>>>
>>>>>> what I use to keep track
>>>>>>
>>>>>> Black is hot white is not
>>>>>>
>>>>>> Bob K3DJC
>>>>>>
>>>>>> On Sun, 9 Oct 2011 17:09:09 -0000 "mal hamilton" writes:
>>>>>>
>>>>>>> LF
>>>>>>> I have a USA amplifier with 230v input. The mains wires are
>>>>>>> BLACK, WHITE, and GREEN
>>>>>>>
>>>>>>> The cct diagram shows White as the live wire with amplifier
>>>> mains
>>>>>>> switch in this line, Black goes to the other end directly to
>>>>>>> transformer primary
>>>>>>> and Green to earth.
>>>>>>> but
>>>>>>> according to USA info the Black wire should be Live and White
>>>>>>> Neutral.
>>>>>>>
>>>>>>> So beware !!!!!!!!!!!!!!
>>>>>>> de g3kev
>>>>>> ____________________________________________________________
>>>>
>>>>
>>>>
>>> ____________________________________________________________
>>> 57-Year-Old Mom Looks 25
>>> Mom Reveals $5 Wrinkle Trick That Has Angered Doctors!
>>> http://thirdpartyoffers.juno.com/TGL3141/4e931414668c54808em03vuc
>>>