- Mike

>So, Hugh, if what you are saying is true, and I wish to

not really. I cannot see the logic of this..

>dump on the 240VAC side of our transformers (which you

>have recommended doing), this means that instead of a

>4500 watt machine (for battery charging), that I MUST

>provide a 10600 watt AC dump load (max output

>is supposed to be 5300 watts), minimum, correct?

3 ac dump loads rated at a lower voltage, with 1.5kW rating will work fine.

The rms voltage between any 2 ac wires will be about 40 volts.

Hugh

www.scoraig.com

visiting eigg

Scotland

+44 1854 633 286 (233fax)

(UK 01854 633 286)

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eGroup home: http://www.eGroups.com/group/awea-wind-home

http://www.eGroups.com - Simplifying group communications - woops I didn't read the message carefully enough (too late last night).

Mike was talking about his 240 volt AC wires (and not the previous 48 volt

system).

>So, Hugh, if what you are saying is true, and I wish to

3 loads at 1.5kW each is what you need, you may need to check the rms

>dump on the 240VAC side of our transformers (which you

>have recommended doing), this means that instead of a

>4500 watt machine (for battery charging), that I MUST

>provide a 10600 watt AC dump load (max output

>is supposed to be 5300 watts), minimum, correct?

voltage between the wires when the batteries are at dumping voltage. If the

actual voltage between the ac wires is 240 then loads at 1.5kW each rated

for 240 volts will do the job. If the voltage turns out to be lower then

you may need loads with a higher nominal power rating.

the current in each wire from the wind machine will be 73% higher than the

current to each load because the loads will be connected delta. If you

prefer you can connect the loads 'wye' or 'star' in which case each load

will get the full current from one wire but will operate at lower voltage.

In any case the power the loads consume will be equal to the power the

windmill produces .

If in doubt, just try it and see, but do not run loads at voltages much

above the rated voltage or they may become a hazard.

Hugh

www.scoraig.com

Scotland

+44 1854 633 286 (233fax)

(UK 01854 633 286)

------------------------------------------------------------------------

eGroup home: http://www.eGroups.com/group/awea-wind-home

http://www.eGroups.com - Simplifying group communications - Mike

>So, Hugh, if what you are saying is true, and I wish to

not really. I cannot see the logic of this..

>dump on the 240VAC side of our transformers (which you

>have recommended doing), this means that instead of a

>4500 watt machine (for battery charging), that I MUST

>provide a 10600 watt AC dump load (max output

>is supposed to be 5300 watts), minimum, correct?

3 ac dump loads rated at a lower voltage, with 1.5kW rating will work fine.

The rms voltage between any 2 ac wires will be about 40 volts.

Hugh

www.scoraig.com

visiting eigg

Scotland

+44 1854 633 286 (233fax)

(UK 01854 633 286)

------------------------------------------------------------------------

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