🚀 go-pugleaf

Oz (Oz@upthorpe.demon.co.uk) wrote:
: In article <QUC5wUB+JVfyEw79@wookie.demon.co.uk>, John Beardmore
: <wookie@wookie.demon.co.uk> writes
: >Depends what you understand by 3-ph.  Are we talking mains powered star
: >or delta wired steaming great 240/440 Volt thing or are we talking
: >stepper motor ?
: >
: >A 3-ph motor will require a 3 pole relay/contactor.  A stepper motor
: >will need a stepper controler or some software that you write to drive
: >power transistors to control each pole of the motor.
: 
: An opto coupled triac is a cheap, easy and safe way to couple computer
: outputs to mains. Actually optocouple most things, it's safer in case of

I know somone who built such a circuit into a 4 way block. (adding a 5 pin
din for the control.)

BTW if you wish to drive more than the limit of the opto triac have this
control another triac. If you really want to deal with high powers it is
quite possible to arrange for the incomming live to be on MT2 and use
a combined heatsink/busbar.

: the odd miswiring. 240 VAC (or even 24VDC @ 50A) into your serial port

415V is even nastier...