Question 125Electricity/Electronics - 1st Asst/Chief70% to pass
What would happen if the centrifugal switch or relay, for cutting out the starting winding of a split-phase induction motor, failed to open while the motor was in operation?
AI Explanation
The correct answer is C) The winding would burn out.
If the centrifugal switch or relay that cuts out the starting winding of a split-phase induction motor fails to open while the motor is in operation, the starting winding will remain energized. This will cause an excessive current to flow through the starting winding, resulting in the winding overheating and eventually burning out. The motor will not over-speed (A) or run at a reduced speed (B), and there is no time delay mechanism (D) that would stop the motor in this scenario.
Related Questions
#123 As shown in figure "A" of the illustration, with a digital multimeter set up as an ohmmeter, what set of readings would be consistent with an open in phase "C" of the single circuit, wye-connected stator windings as shown? Illustration EL-0201 #124 A digital multimeter is set up as shown in the illustration to evaluate the single-circuit stator windings of a squirrel cage induction three-phase motor. The following readings are taken: From T1 to T2 reads 1.6 ohms. From T2 to T3 reads "OL" ohms. From T3 to T1 as shown reads "OL" ohms. What condition is indicated? Illustration EL-0219 #126 Which of the following problems will most likely occur if the starting winding of a split- phase induction motor failed to cutout once the motor approached operating speed? #127 When testing the rotor of a synchronous motor for short circuits, a low voltage source is applied across the rotor coils through the collector rings. What would be the indication of a short- circuited coil? #128 As shown in the illustrated diagnostic setup for locating an open field coil of a ten- pole synchronous motor, if 240 VDC is applied across the brushes, what statement is true if one of the field coils is open-circuited? Illustration EL-0203