These faults were reported to have occurred on a D.C. Motor.
a. Failure to start.
b. Sparking brushes.
| S/No | FAULT | CAUSE | REMEDY |
| (a) | Failure to start | i. Open circuit on starter resistance.
Ii. Open circuit on-field circuit. |
Change the starter resistance. Rewind the field winding. |
| (b) | Sparking at brushes. | (i) Open circuit. (ii) Shorted or earthed armature coil. (iii) Wrong brush position. (iv) Motor overloaded. (v) Dirty or worn out commutator. |
Proper connection
Proper lamination and insulation. Proper position. Reduce the load. Clean the commutator or replace the commutator. |
