Exam Question
Q4
With reference to a 3 speed A.C. motor driven cargo winch:
(a) Sketch a circuit diagram for a pole change motor;
(b) Describe how speed change and braking are achieved
Class 2 (2nd Engineer)
MET
📅 Jan 2026
Reference Answer
### (a) Circuit Diagram for a Pole Change Motor
A diagram is required to illustrate the electrical connections for a three-speed, two-winding pole-changing motor. The diagram should clearly show:
1. **Power Supply:** Three-phase AC supply (L1, L2, L3).
2. **Motor Windings:** Two separate stator windings.
A diagram is required to illustrate the electrical connections for a three-speed, two-winding pole-changing motor. The diagram should clearly show:
1. **Power Supply:** Three-phase AC supply (L1, L2, L3).
2. **Motor Windings:** Two separate stator windings.
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