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Old 11-29-2014, 03:31 PM   #1
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Question Another Electrical question

Another thread on this forum had some explanations about 50 Amp circuits. I think I understand that the neutral wire only carries current to balance the difference in current in the two different legs.
My question - I leave my inverter on all the time. If a current interruption occurs I never notice because the inverter takes over. Now --- is that differential current going to feed back into the power company wiring and surprise the person fixing the fault???

Have a nice day - Darrel
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Old 11-29-2014, 04:28 PM   #2
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Quote:
Originally Posted by Darrel View Post
Another thread on this forum had some explanations about 50 Amp circuits. I think I understand that the neutral wire only carries current to balance the difference in current in the two different legs.

My question - I leave my inverter on all the time. If a current interruption occurs I never notice because the inverter takes over. Now --- is that differential current going to feed back into the power company wiring and surprise the person fixing the fault???



Have a nice day - Darrel

No, because your automatic transfer switch will disconnect the shore power when it shuts off.
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Old 11-29-2014, 04:35 PM   #3
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Originally Posted by newmarpusher View Post
No, because your automatic transfer switch will disconnect the shore power when it shuts off.

X2 !
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Old 11-29-2014, 05:05 PM   #4
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Do you mean that the transfer switch defaults to generator?? I had thought it was the other way since if I start the generator there is a delay before the switch will transfer.
Thanks for the education.

Have a nice day - Darrel
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Old 11-29-2014, 05:32 PM   #5
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No, because your automatic transfer switch will disconnect the shore power when it shuts off.
The transfer switch NEWMARPUSHER is refering to is internal to the inverter, NOT the shore power / Generator transfer switch.
His information is exactly correct.
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Old 11-29-2014, 05:44 PM   #6
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To answer your question: NO, it will not.

OF course this brings up the question WHY

Internal to the inverter is a power transfer switch, Just like the ATS for a generator,, IF shore power is present, it senses it and connects to it (Provided it meets the standards programmed into the inverter for voltage, frequency and waveform.) if the incoming power does not meet the inverter's standards, the switch TRANSFERS to the inverter.. Multi pole double throw relay. The result is there is no common wire between the inverter output and the shore cord.
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Old 11-29-2014, 05:53 PM   #7
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Quote:
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Do you mean that the transfer switch defaults to generator?? I had thought it was the other way since if I start the generator there is a delay before the switch will transfer.
Thanks for the education.
Have a nice day - Darrel
Darrel
Mine defaults to generator after a short delay.
The same time delay that occurs before the coach gets genset power if/when the genset is started when the coach is not connected to shore power.
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Old 11-29-2014, 06:03 PM   #8
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Quote:
Originally Posted by PandK View Post
The transfer switch NEWMARPUSHER is refering to is internal to the inverter, NOT the shore power / Generator transfer switch.
His information is exactly correct.
Quote from post #1: My question - I leave my inverter on all the time. If a current interruption occurs I never notice because the inverter takes over. Now --- is that differential current going to feed back into the power company wiring and surprise the person fixing the fault???


I believe he is referring to the shore/genset transfer switch, if the power went out, the shore/genset transfer switch would drop out.....leaving the inverter to pick up and supply power.......if the inverter's transfer switch dropped out also.......nothing. Your "inverted" power is isolated to your Coach due to the fact the shore/genset transfer switch has dropped out due to no AC power on the shore power cord.
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Old 11-29-2014, 07:04 PM   #9
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Another of my senior moments. I should have remembered that my inverter has it's own switch. I've actually removed the panel once and checked that all of the connections were secure. Thanks for the reminder and patience.

Have a nice day - Darrel
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Old 11-29-2014, 08:24 PM   #10
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Quote:
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The transfer switch NEWMARPUSHER is refering to is internal to the inverter, NOT the shore power / Generator transfer switch.
His information is exactly correct.

Yes, I was referring to the transfer switch internal to the inverter.
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Old 11-29-2014, 08:41 PM   #11
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Another Electrical question

Quote:
Originally Posted by Darrel View Post

My question - I leave my inverter on all the time. If a current interruption occurs I never notice because the inverter takes over. Now --- is that differential current going to feed back into the power company wiring and surprise the person fixing the fault???



Have a nice day - Darrel

If the AC input to your coach drops out, be it shore power or generator, the Inverter kicks on to feed the outlets and appliances in your coach. It is not connected to your external AC source at all. Relays prevent that. It takes its input power from your batteries.
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