True or False: A switch can open (isolate) any length of line that has no load on it. 6. 7. When ...
True or False: A switch can open (isolate) any length of line that has no load on it. 6. 7. When a disconnect switch is operated, a breakage may cause energized leads to contact the switch frame. What is the best protection for an operator when standing on the ground, to open a three-phase gang-operated switch with an operating handle? 8. Why is the use of a ground gradient mat required when operating switchgear from a control box? What potential hazard exists when switching from the ground using a telescopic switch stick? 9. 10. Why is it important to check that all three poles are open after opening a three- pole switch? 11.Why should a cutout not be opened with a switch stick to interrupt load?
True or False: A switch can open (isolate) any length of line that has no load on it. 6. 7. When a disconnect switch is operated, a breakage may cause energized leads to contact the switch frame. What is the best protection for an operator when standing on the ground, to open a three-phase gang-operated switch with an operating handle? 8. Why is the use of a ground gradient mat required when operating switchgear from a control box? What potential hazard exists when switching from the ground using a telescopic switch stick? 9. 10. Why is it important to check that all three poles are open after opening a three- pole switch? 11.Why should a cutout not be opened with a switch stick to interrupt load?