(Ans) These older coils can be used with the 5560A, 5550A or 5540A but with the following important considerations in mind:-
- Continuous current is only possible up to 11A for the older current coil.
- Any current above 11A (and < 20A) applied to these coils should be restricted no more than 120 seconds.
- Cool down duration of 8 minutes is needed after applying high current to the coil.
- Injecting current of above 20A is highly not recommended - as it’ll cause irreversible damage to your old coils.