can I rewind a 220 volts coil into 24 volts?
I have in the past rewound magnetic machines (like relays) to operate at lower voltage.
I rewound a 24V counter to 12V by unwinding the coil folding it in half and winding it back on connecting the original two ends to one terminal and the midpoint to the other.
A 220V contactor will have very fine wire so you'll need to be careful when handling the wire. you'll probably need tools and materials to splice it when it breaks. (sandpaper, soldering iron, flux, solder, and lacquer)
\$ 220 \div 9 = 24 {4\over9}\$ (which is probably close enough to 24) so you should divide the wire into nine equal pieces and wind the coil with nine strands of the original coil in parallel.
Twisting the strands into a &quot;rope&quot; before winding may make the process easier.
If you started with a contactor with an AC coil the new contactor will still want AC.