What type of switch is used to control alternatively three-phase line system using two sources of power?
A. Double Pole Single Throw Switch
B. Single Pole Double Throw Switch
C. Triple Pole Single Throw Switch
D. Triple Pole Double Throw Switch
Answer:D
What type of switch is used to control alternatively three-phase line system using two sources of power?
A. Double Pole Single Throw Switch B. Single Pole Double Throw Switch C. Triple Pole Single Throw Switch D. Triple Pole Double Throw Switch