Chapter 16, Problem 1RQ

What conditions must be met before two alternators can be paralleled together?

To determine

The conditions that must be met before two alternators can be paralleled together.

Explanation of Solution

The below figure represents two alternators connected in parallel arrangement.

The conditions that must be met before two alternators can be paralleled together are listed as follows.

1. 1. The connection should be made to ensure that the phase rotation of all the machines is same.
2. 2. The phases of the machine should be connected in sequence. The phase A of one machine is connected to the phase of A of another machine. Similarly, connect the phases B and C.
3. 3. The alternator should have same output voltage.