Understanding Transformer Connections and Three-Phase Units

What is the primary connection type for phase-to-ground in transformers?

• Delta

• Wye

• Star

• Zigzag

Fill in the blank: The 'power' transformer is normally _______ because it supplies some of the three-phase load.

• larger

• smaller

• equal

• negligible

What is the configuration called when three-phase power cannot come from Open-Wye secondary?

• Open-Delta

• Closed-Delta

• Star-Delta

• Zigzag-Delta

What should you not connect to the lighting load in a three-phase system?

• 120 volts

• 208 volts

• 240 volts

• 480 volts

Remove the _______ if your using a power pot

• Power leg

• Ground strap

• Neutral

• Fusing

What is always needed to identify in the bank for a 120/240 three-phase secondary?

• Power leg

• Ground strap

• Neutral

• Fusing