Class 4 (4th Engineer) MET 📅 Sep 2025

Exam Question

(a) Sketch the following types of electric motor connections: (8)

(i) A star connection

(ii) A delta connection

(b) Explain how and why star and delta connections are combined to produce a Star / Delta starter for an electric motor. (8)

Reference Answer

### (a) Electric Motor Connections
#### (i) Star (Y) Connection
A Star connection is a method of connecting the three windings of a three-phase motor. Each winding has a start (1) and a finish (2) terminal (e.g., U1-U2, V1-V2, W1-W2).
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