A thorough understanding of Delta and Wye service transformers, their primary and secondary windings, and their windings’ voltages, will help HVACR service technicians in their understanding of ...

The alternating current that flows through the primary winding establishes a time-varying magnetic flux, some of which links to the secondary winding and induces a voltage across it. The magnitude of ...

T he greater the turns ratio, the greater the voltage step-up. A 100:1 turns ratio (typical of many coils on the market) means there are 100 secondary turn windings to every one primary turn.

Primary and secondary leakage reactance (secondary stray losses) Primary and secondary winding resistance (primary stray losses) Excitation losses (iron core losses) Figure 2 indicates the equivalent ...

It's important to note that a PT is designed so that its secondary voltage has a fixed relationship, or ratio, with its primary voltage. Table 1 (click here to see Table 1) lists commercially ...

Remember, the secondary of these transformers receives its voltage from the primary windings of the transformer through induced voltage. The primary windings are not shown. Any time a Delta ...