AndyMH wrote: ⤴
Fri Apr 19, 2019 5:45 am
So, I would like to hear from an engineer's viewpoint, why would that be?
and, IF, a soft starter could be installed, could I do it in a manner where it would only be put to use at my call?
as in, I have now started up the AuxGen and need to run the A/C compressor...
If, as I would expect, the motor in the HVAC is a standard induction motor, I can't think of any reason. Maybe something on the compressor side? Note, it is years since I did any 'real' engineering work.
In addition to the double pole switch you already have so you can switch between the genset and mains power, you would need another DP switch - centre to the power source, then one side of the switch direct to the HVAC and the other to the soft starter which is then wired to the HVAC - so you can switch between the starter or direct power. I suspect your problem would be cost, having already invested in a big enough genset to cope with the starting current, you would now need to buy a starter which I don't think will come cheap. The majority of the market for these is industrial and three phase.
Here in the UK, you wouldn't be 'allowed' to make such modifications to the domestic wiring. Any changes to home wiring must be done by a 'suitably qualified person'. Although I have a degree in electrical engineering I am not judged to be 'suitably qualified'. If I make changes - like I've rewired most of the house, I have to get a 'qualified' person in to check and certify my work. This change to the regs was done in the early '00s at the same time as they changed the wiring colours (from red/black to brown/blue), so easy to spot later changes.
Thank you for your comments:
Public Service came out and removed the electric meter, so everything was dead while I worked on it.
I qualified myself as "the expert" and I made all of the wiring Nice, Neat, and Purty, just like I did when we wired up our Microwave buildings. Everything parallel, and zip tied to stay laid out like I wanted it.
Called up Public Service and said "the electrician said you can put the meter back in now",
and they did, never asked me to see the certification....
kudos for living in the backwoods away from picky city inspectors.
Cost is going to keep things as they are, we can enjoy everything except for Air Conditioning for days if need be.
The house has six inch thick sandstone block walls, and the inside temperature is fairly stable even in the summer.... never seen it up over 80°F with Public Service power off.
the real bugaboo with the home, is it was constructed 50 years ago, without the use of a TeeSquare or ruler.... none of the walls are square, doors will close by themselves if you don't latch them back, or block them with a shoe
so, why did I buy it? My wife was suffering from a leg amputation, in a wheelchair, and we needed 36" wide doors and no steps...... and this house was built for a Vietnam War veteran in a wheelchair, roll in flat to the shower, just a little hump to roll over... fantastic for the need at the time...
oh, the windows are crooked also, wind blows in around the sides of the frames.....
we cover them with visqueen in the winter....