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Author Topic: battery isolator  (Read 4741 times)
gumpy
Some Assembly Required
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Slightly modified 1982 MC9


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« Reply #30 on: September 11, 2006, 11:02:42 AM »

One other thing I'm curious about regarding these Wrico setups. 

What do they have you guys do for neutral-ground bonding?

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Craig Shepard
Located in Minnesquito

http://bus.gumpydog.com - "Some Assembly Required"
H3Jim
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1995 Prevost H3-41, series 60, B500 Allison




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« Reply #31 on: September 11, 2006, 11:07:20 AM »

A separate relay since neither the Xantrex not the iota will switch the neutral.
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Jim Stewart
El Cajon, Ca.  (San Diego area)

Travel is more than the seeing of sights, it is a change that goes on, deep  and permanent, in the ideas of living.
gumpy
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« Reply #32 on: September 11, 2006, 11:09:27 AM »


What triggers the coil in that relay?
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Craig Shepard
Located in Minnesquito

http://bus.gumpydog.com - "Some Assembly Required"
H3Jim
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1995 Prevost H3-41, series 60, B500 Allison




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« Reply #33 on: September 11, 2006, 08:41:48 PM »

Could be either source, but I have chosen the one tht doesn't cost anyting extra when its running,  current from the power pole.
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Jim Stewart
El Cajon, Ca.  (San Diego area)

Travel is more than the seeing of sights, it is a change that goes on, deep  and permanent, in the ideas of living.
David Anderson
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South Texas in the Eagle Ford Shale area




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« Reply #34 on: September 12, 2006, 07:10:40 AM »

I removed the isolator and bought a continuous duty, heavy duty silver contact relay from http://texasindustrialelectric.com/relays.asp  This way I'm always isolated from the alternator when the genny is on.  I figured it takes about 50hp to get that 300 amps out of the Neihoff.  I need that to the wheels, not my air conditioners.  That power really makes a difference.

David
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pvcces
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« Reply #35 on: October 04, 2006, 07:34:21 PM »

For what it's worth, 300 amps at 27 volts comes to 8.1 kw. The mechanical equivalent is less than 11 hp. The power wasted by the diodes at full output amounts to around 300 watts, and it's proportional to the power output. If the windings don't lose any more than the diodes, then you're looking at 600 watts at full blast, or less than one hp.

When unloaded, I don't think that these units take much to spin over. Mostly oil drag, I would guess.

I would have no trouble believing that one of these could soak up 12 hp., but that's about it. Even so, you're talking the better part of a gallon of fuel per hour while running full tilt.

Tom Caffrey
Suncatcher
Ketchikan, Alaska
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Tom Caffrey PD4106-2576
Suncatcher
Ketchikan, Alaska
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