control star delta starter with microcontroller

[hiren.dave@bhuved.com]

HI,


i want to control star delta starter using pic 32 microcontroller. how can i do that? any driver or other ic is required?

 

[aljamri]

Which part of the starter do you want the PIC to controll ? The delay or the change over ?

 

[hiren.dave@bhuved.com]

honestly, i don't know the delay. i just want that star starter should be changed with delta by microcontroller.

please, suggest me the time delay.

any reference from which i can read easily...?

 

[aljamri]

The time differes from motor to motor, so that, star delta starters come with a facility of adjustable time delay.
Google for "Start Delta Starter Timer Delay" and you'll get lots of information.

 

[hiren.dave@bhuved.com]

ok.thanks friend....

 

[dr pepper]

Yes I suggest you use a pot on the final unit so you can adjust the time from say 2 secs to 20 secs, so you can use the unit on most installations.
Also I'd suggest that you include some sort of interlock within the software so that both star and delta contactors dont come in at the smae time and atke out the supply (Ok they are not going to pull in at the same time, but for some reason if one jams in then the micro should pick that up and prevent pulling another in causing a short, this is usually done both electrically and mechanically with commercial starters).