The reactive capacity of capacitor banks utilized for power factor correction is conventionally designated in____________?
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Answer: C. kVAR
Explanation
Capacitor banks used for power factor correction supply reactive power to industrial electrical systems. Reactive power is conventionally measured and designated in units of kilovolt-amperes reactive or kVAR. Rating capacitor banks in kVAR allows engineers to match reactive power requirements with inductive loads. Power factor is the ratio of real power to apparent power in alternating current electrical grids. Inductive loads like motors consume reactive power, causing lagging power factors in industrial systems. Adding parallel capacitor banks generates leading reactive power to cancel out lagging inductive reactance.
Electrical utilities mandate high power factor operation, requiring large kVAR capacitor banks in factories. Correcting power factor reduces line current, lowers energy losses, and improves overall system capacity. Substation engineers routinely size capacitor banks in kVAR to stabilize grid voltage levels. Option A measures active real power in kilowatts, which does not describe reactive capacitor ratings. Option B measures apparent power in kilovolt-amperes, combining real and reactive power components. Option D measures electrical potential difference in volts, which is not a unit of reactive power capacity.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
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