What are two advantages of the line interactive UPS? (Choose two.)

Question

Options

• AHigh reliability
• BHigh efficiency
• CHigh frequency control
• DOptimized for 10 kW and above

• A
  69% (20)
• B
  7% (2)
• C
  21% (6)
• D
  3% (1)

Explanation

Line interactive UPS systems are known for high reliability because they use an autotransformer to continuously regulate voltage and condition power without switching to battery for minor fluctuations, making them more dependable than simpler standby UPS designs. High efficiency (B) is not a defining advantage of line interactive UPS - online double-conversion UPS systems sacrifice efficiency for maximum protection, while standby UPS are the most efficient; line interactive falls in between but is not particularly distinguished by efficiency. High frequency control (C) is not a standard feature or selling point associated with line interactive UPS - frequency regulation is more characteristic of online UPS systems. Optimized for 10 kW and above (D) describes large online UPS systems used in enterprise or data center environments, not line interactive units, which are typically sized for small to medium applications.

Memory tip: Think of line interactive UPS as the "middle ground" option - reliable and practical, sitting between the basic standby UPS and the powerful but complex online UPS. If an answer sounds like it belongs to the extremes (massive scale or ultra-efficient), it likely describes a different UPS type.

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