It's a single fan (quite large) and the control box is a mass of wires, why?

 

It's probably an invertor/speed controller?

Ours is a box of quite considerable size, with 2 cooling fans, so I'm not surprised to see that.

 

looks like a 3 phase motor star delta starter to me complete with a isolater and start/stop push buttons. The star delta starter is a method of reduced voltage starting used on motors over a certain size to reduce mechanical enertia (spelling) and electrical inrush + it has protection for the motor

Hope this helps

Kind regards Frank

 

franks right,, its a star-delta starting motor!

 

In english your fan is so power full it cannot just start as a normal motor would (genuinely)

 

Cooool Thanks for the explanation guys. Good job I didn't wire it into a 3 pin socket then..

 

if that box ever breaks,,, rip it off the wall and buy a soft start! much nicer way to start a large motor!

 

I can also see a latching contactor, presumably so you don't have 3-phase going through the 'on' swtich.

 

i can see the main, star and delta contactor, and a timer to control the transition point between star and delta

 

Proper snakes orgy in there!

 

agree with everything gareth said , haven't a clue what rab is on about.
soft start is nice but Ł500+ just for the starter

 

Looking at the overload it doesn't seem a very big motor,what kilowatt is it ?

 

more like 200 quid LOL

 

i use telemacanique ŁŁŁŁŁŁŁŁŁŁŁŁŁŁŁŁŁŁ

 

Better off with omron or klockener moeller m8.

 

i can just picture martin doing this

http://www.lionel.com/products/Produ...11000_3489.jpg

 

yeah... but when the cost of the rolling road is many thousands...
stuff like that is just 'the little bits you have to have'

 

7.5 kw, just ran it for the first time It's on lockable castors which I forgot to lock and once started it was off on it's travels big time!!! It's also re distributed every bit of dust in the shop and blown over ladders and other stuff in the way!

 

Are you doing your own mapping or is someone operating the r/r for you?

 

Going to be doing it all myself.

 

Aye it'll blow skirts up no probs lol.

 

ever action has an equal and opposite reaction LOL

 

As said in the film 'snatch'

 

So do we but there free!


Just go into store's and get one out

 

if anybody doesn't make the numbers they hoped for they won't beable to blame the fan

 

They´r right, a softstart is a much better system, but this is actually build because it will overload the fuses and powerlines in no time when it starts up, so it will start in star delta and save you from building a HUGE power outlet.
7500watt is about 32 amps and the start current is maybe arr 150amps (cant remember the right formular to this) if it starts up normally, but this system makes it to start up with maybe a third of that.

 

7-10 times FLC is a good guild to starting current!

fans are terrible as they need alot of torque to drive, as the load is never disconnected!

 

are we in the middle of an electrical nerd off on PF?

 

No,
But check that the overload is set to approx 0.58 F.L.C. (set on the small yellow dial under K.1M)

.

 

I reckon so! Great reading, so much knowledge on here, and what this place should be like

 

were all secretly working for reyland as PR nerds

 

i always set them to 100% running current,, as tested once the unit is operational!

 

Is that directed at me? If so I will check

 

what ecu's you gonna be mapping ? any/all ?

jim

 

Mainly Pectel as that's my ECU of choice but I will work with others.

 

The 0.58 depends on how your s/d starter is laid out though m8.

 

3 pin plug's fine for it,
just remember to use a 13amp fuse, it'll blow a 3amp lol

 

cool !

 

you are right of cause, if the thermal overload is on the delta contactor it should be set to 0.58 FLC,

i dont really like doing this method, as generally everyone over rates there motor size when designing a system and the motor never runs anywhere near FLC, so i always test!