A synchronous machine has 12 pole pairs and delivers power to the grid at a fixe

Question

A synchronous machine has 12 pole pairs and delivers power to the grid at a fixed frequency of 60 Hz. What is the rotor speed in RPM in steady-state? Question 5 Not yet answered Marked out of 7.14 PFlag question Select one a. 250 RPM b. Cannot be determined c. 300 RPM O d. 600 RPM Question 6 A synchronous machine is connected to an infinite bus. Its armature resistance is negligible and its synchronous reactance is 1 The infinite bus has a line-line voltage of 33 kV with 50 Hz frequency The internal voltage of the with the infinite bus behind the internal voltage source. What is the operation mode of the machine? Select one yet answered of74 machine is 32 kV (line-line). The angle difference between the internal voltage source and infinite bus is 10 degrees P Flag question a. Motor, absorbing 183.3725 MVar b. Generator, generating 183.3725 MVar c. Generator, generating 183.3725 MW d. Motor, absorbing 183.3725 MW

Explanation / Answer

5)the answer is b,in this cse Rotor speed cannot be determined without giving slip. Only synxhronous speed can be determine by the above data.

6)

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