Hi all, anyone know about power inverters? What sort of spec would I need to run an extension lead and Reciprocating saw? Is it as simple as whatever power the motor in the saw is, ie, 800w, I just need an 800w inverter. Do they lose power? Could I power a PS2 with the same inverter?

Andy

 

usually the power rating they give is short term and genrally the real term power is about half that. Some electrical circuits especially capacitive (sp) circuits don't like the wave they produce or something like that, and it will break something or another. Id try to not use an extension lead or not a long one as you may start to get volt drop would be best to plug in straight in if you could. Also for an 800w load it will draw over 70A at 12v so you need some big batteries or even the engine running to keep them charged up. Should run your PS2 OK. also bear in mind if your saw goes under load it may draw more than the rated current and activate a safety cut out, not what you need if your half way through cutting someone out of there car.

could you not use a genertaor would be a better option IMO.

 

Lecky motors can be odd when powered by invertors, unless you get one much larger than you need, which will cost way more than a portable genny!!
I use invertors, my 1500watt would run 1700 all day long but of course gets hot, peaks at 2200 watts, they draw way more than the calculations show due to not being 100% effecient.
tabetha

 

The only Power Invertors I use are in the Traction Container Units on the Siemens 333 electric trains I drive

They take 500v AC single phase and rectify it to DC for controlling, and then invert it back upto 600v AC 3 phase with variable frequency via the use of Integrated Bi-Polar Transistors. They don't half squeel when you fling the throttle wide open


Absolutely no use to you at all, but I like em

 

Not just a driver, but a spotter too.

 

Its unlikely you'll find one that will be happy running a motor at that sort of wattage...

Alex

 

We have to know the traction units we drive inside out - every last detail is needed

Personally, I think its a bit too in-depth, as if they break all we can do is isolate them - its a fitters job to get dirty and start pissing about taking it to bits