Which UPS topology is most commonly used to protect small business and departmental servers where voltage regulation is required?

Question

Options

• AStandby
• BLine interactive
• CHigh-speed relay
• DDelta conversion online

• A
  2% (1)
• B
  75% (33)
• C
  16% (7)
• D
  7% (3)

Explanation

Line interactive UPS sits between the basic standby and the expensive online topologies, making it the practical sweet spot for small business and departmental servers: it uses a built-in autotransformer to actively regulate voltage during sags and surges without switching to battery power, which is exactly what "voltage regulation required" points to. Standby (A) is wrong because it passes raw utility power directly to the load and only switches to battery during an outage - there is no voltage regulation in normal operation. High-speed relay (C) is not a recognized UPS topology; it describes a switching mechanism, not a product class, and is included as a plausible-sounding distractor. Delta conversion online (D) is a real and highly capable topology, but it is designed for large-scale, enterprise-critical loads and carries a price premium that makes it impractical for the small business and departmental server use case described.

Memory tip: "Line interactive" literally acts on the line - it conditions incoming voltage continuously, so whenever you see "voltage regulation" in a question paired with a small-to-mid-size deployment, line interactive is the answer.

No community discussion yet for this question.