A three-phase, 480-V, 5000-kVA generator connects to many feeders, one of which takes single-phase power to two equipment at the other end (see figure below) via a cable and transformer with combined Z = 0.03 + j0.07 Ω. The voltage at point A at the receiving end rises and falls as a large single-phase, 300-kVA load varies over time. The small 1-kVA load remains online continuously and must accommodate the voltage variations at point A with a 300-kVA load fully on or fully off. Determine the voltage range that the 1-kVA load will see, over which it must perform as intended.

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Cable + Trfr Z= 0.03 +1 0.07 Current I 3-ph generator with 480 V regulated (constant) voltage Point A 300 kVA Load 0.85 pf lagging 1 kVA Load