Iec 402 homework - Study guides, Class notes & Summaries

1. A voltage surge can be caused by . Select one: a. a lightning strike b. normal switching of high-power circuits c. either a or b d. neither a nor b: c. either a or b 2. A lightning arrester is a device that protects electrical equipment from . Select one: a. short circuits b. ground faults c. voltage surges d. all of these: c. voltage surges 3. In addition to protecting a motor from single-phasing, phase failure relays provide protection against . Select one: a. undervoltage...