. What is the locked rotor code for motor? a. Show calculations for locked rotor
ID: 2990902 • Letter: #
Question
. What is the locked rotor code for motor?
a. Show calculations for locked rotor current.
b. Why is this an important specification?
c. What physical design feature of the motor affects the locked rotor code?
12. What is the NEMA design code for this motor?
a. This would be a great place to insert a graph and discuss its meaning.
b. What physical design feature of the motor affects the design code?
13. What is the insulation class for this motor?
a. Give a full explanation of what this temperature rating means.
14. What is the efficiency of this motor?
a. Calculate the full load efficiency using nameplate data.
b. Is this efficiency constant from no load to full load?
c. Is this considered a good efficiency?
d. What is considered high or premium efficiency?
e. What design factors affect motor efficiency?
15. What is the power factor of this motor?
a. Calculate the power factor using nameplate data.
b. Is this power factor constant from no load to full load? Why?
c. What design factors affect power factor?
Explanation / Answer
What is the locked rotor code for motor?
When AC motors are started with full voltage (Across-the-Line Starting), they draw line amperage 300% to 600% greater than their full load running current. The magnitude of the
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