ISA Certified Automation Professional (CAP) program
Certified Automation Professionals (CAPs) are responsible for the direction, design, and deployment of systems and equipment for manufacturing and control systems.
Why must voltage be reduced along with frequency in a variable frequency speed controller?
A. to let the motor cool off.
B. because of capacitive reactance.
C. to maintain the volts/hertz ratio.
D. to keep the motor from overspeeding.
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