Moderate
By which of the following a bus-bar is rated?
Correct answer: D. Current, voltage, frequency and short time current
- A. Current only
- B. Current and voltage
- C. Current, voltage and frequency
- D. Current, voltage, frequency and short time current
Explanation
A bus-bar is specified by its continuous current, rated voltage and frequency, along with its short-time withstand current for fault conditions. Hence all four quantities are relevant.
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