In a delta-connected electrical system, how does coil voltage compare to phase voltage?

In a delta-connected electrical system, how does coil voltage compare to phase voltage?

• A. Stays the same
• B. Increases with load
• C. Decreases with frequency
• D. Depends on power factor

Answer: (A)

In a delta connection, each winding is connected directly between two lines, so the voltage across every coil is simply the line-to-line voltage. That means the coil voltage equals the phase voltage in a delta configuration. It doesn’t depend on load, frequency, or power factor for this relationship, unlike a wye connection where phase voltage is the line voltage divided by √3.

In a delta connection, each winding is connected directly between two lines, so the voltage across every coil is simply the line-to-line voltage. That means the coil voltage equals the phase voltage in a delta configuration. It doesn’t depend on load, frequency, or power factor for this relationship, unlike a wye connection where phase voltage is the line voltage divided by √3.