An electrical substation had a sudden discharge arc event lasting 0.005 seconds. The event produced 768,000 volts that conducted 500 amperes to a nearby grounded metal strap and opened a 500 ampere protective breaker. (a) How much power was produced by the electrical discharge? (b) How much energy was in the discharge? (c) How long could a 75 watt light bulb stay lit, if all the energy in the arc was used to operate it?

An electrical substation had a sudden discharge arc event lasting 0.005 seconds. The event produced 768,000 volts that conducted 500 amperes to a nearby grounded metal strap and opened a 500 ampere protective breaker. (a) How much power was produced by the electrical discharge? (b) How much energy was in the discharge? (c) How long could a 75 watt light bulb stay lit, if all the energy in the arc was used to operate it?

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter2: Basic Electricity

Section: Chapter Questions

Problem 27RQ: How do electric utility companies charge customers for electricity?

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