Question 236Electricity/Electronics - 1st Asst/Chief70% to pass
Which of the following statements is true concerning the manual motor starter diagram shown in figure "A" of the illustration? EL-0023
AI Explanation
The correct answer is B) The motor has three-leg protection by thermal overloads.
This is the correct answer because in a manual motor starter diagram, the three-leg protection by thermal overloads is the standard configuration to protect the motor from overload conditions. Thermal overloads measure the current flowing through the motor and will trip the starter if the current exceeds a certain threshold, preventing damage to the motor.
The other options are incorrect because: A) refers to magnetic overloads, which are less common in manual motor starters; C) and D) mention two-leg protection, which is not the standard configuration for a three-phase motor.
Related Questions
#234 What is the function of a shading coil as used in an AC magnetic controller? #235 By what means is the rotation of a three-phase induction motor reversed? #237 What is the proper name for the entire device, including all subassemblies, shown in the illustration? Illustration EL-0181 #238 As shown in figure "A" of the illustration, what is the purpose of the "test button"? EL-0178 #239 As shown in the illustrated three-phase squirrel cage induction motor controller, what type of reduced voltage starter is used? Illustration EL-0116