the generated e.m.f. is D.C.
the generated e.m.f. is pulsating
the generated e.m.f. is A.C.
the generated e.m.f. is oscillating
10 ms
20 ms
30 ms
50 ms
high speed operation
low speed operation
medium speed operation
both low and medium speed operations
5000 kVA
1000 kVA
100 kVA
5 kVA
3-phase heating circuits
3-phase motor circuits
single phase motor circuits
lighting circuits