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Discussion Starter · #1 ·
I have a single phase AC generator, 240 50 amp. 15000 watt.

I got a bridge rectifier to convert the AC to DC

thew bridge rectifier has three ac side inputs and two dc outputs. the dc
outputs are labeled plus and negative.

the wires I have to wire up is a 240 wire, has green, white and black.

i found a picture of a bridge rectifier wired up.

looks like they put the green wire in the middle, the black and white on
either side of it.

I've been reading it doesnt matter which sides the black and white go, but i
imagine the green HAS to be in the middle?
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Discussion Starter · #2 ·
Single phase means that you connect two wires.
The green wire is earth ground, so must not be
connected to the rectifier.
It must be connected to the ground (enclosure) of any
connected device.

It does not matter which two of the three inputs
on your three-phase rectifier you use, you will
only use 4 of the 6 diodes in there anyway when
using single phase. Just wire the white and black
to two of the AC inputs.

Success,

Cor van de Water
Director HW & Systems Architecture Group
Proxim Wireless Corporation http://www.proxim.com
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-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Michael Clark
Sent: Saturday, March 05, 2011 5:25 PM
To: [email protected]
Subject: [EVDL] wiring a bridge rectifier

I have a single phase AC generator, 240 50 amp. 15000 watt.

I got a bridge rectifier to convert the AC to DC

thew bridge rectifier has three ac side inputs and two dc outputs. the
dc outputs are labeled plus and negative.

the wires I have to wire up is a 240 wire, has green, white and black.

i found a picture of a bridge rectifier wired up.

looks like they put the green wire in the middle, the black and white on
either side of it.

I've been reading it doesnt matter which sides the black and white go,
but i imagine the green HAS to be in the middle?
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Discussion Starter · #3 ·
Michael Clark wrote:
> I have a single phase AC generator, 240[vac] 50 amp 15000 watt.
> I got a bridge rectifier to convert the AC to DC.
> The bridge rectifier has three AC side inputs and two DC outputs.

Then it is a 3-phase bridge rectifier, which has 6 diodes in it. That's
OK; you can use it as a single-phase rectifier, which will only use 4 of
the 6 diodes.

> The DC outputs are labeled plus and negative.
> The wires I have to wire up is a 240 wire, has green, white and black.

Green is normally the safety ground; it is not one of the output wires.

> I found a picture of a bridge rectifier wired up.
> Looks like they put the green wire in the middle, the black and
> white on either side of it.

That sounds wrong. If green is ground, then it does *not* go to any
terminal on the bridge rectifier.

Note 1: If the generator says it is rated at 50 amps, that is most
likely its continuous (or at least 1-hour) RMS current rating.

Bridge rectifiers usually advertise the *peak* current rating; what it
can deliver for a minute or less. You have to *significantly* derate if
you expect it to last. You need a 100amp to 200amp bridge to survive
with a 50amp generator.

Note 2: When you rectify the AC and use the resulting DC for battery
charging, the output current you can get goes down significantly. A 50
amp generator can only deliver about 30 amps of DC. That's because all
the current is flowing at the peak of the AC voltage.

--
Lee A. Hart | Ring the bells that still can ring
814 8th Ave N | Forget the perfect offering
Sartell MN 56377 | There is a crack in everything
leeahart earthlink.net | That's how the light gets in -- Leonard Cohen

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