Which three key components make up a three-phase stationary power distribution unit? (Choose three.)

Question

Options

• ARectifier
• BPanel board
• CInput transformer
• DRack mount bracket
• EInput circuit breaker

• A
  4% (1)
• B
  80% (20)
• C
  12% (3)
• D
  4% (1)

Explanation

A three-phase stationary power distribution unit is built around three core electrical components: the input transformer (C), the panel board (B), and the input circuit breaker (E). The input transformer steps incoming high voltage down to usable distribution levels; the panel board distributes that power across individual branch circuits; and the input circuit breaker provides overcurrent protection at the main input feed. A rectifier (A) converts AC to DC and belongs to UPS or battery charging systems, not a standard AC distribution unit. A rack mount bracket (D) is a physical mounting accessory, not an electrical component, so it has no role in the unit's power distribution function.

Memory tip: Trace the power flow from entry to distribution -- it arrives through a transformer, passes through a breaker for protection, and fans out through a panel board. If a component does not appear in that path, it does not belong in a PDU.

No community discussion yet for this question.