Maintenance Technician - Electrical 07-Aug-2022 16_00-18_00


Question 1

The open-circuit voltage (measured across Phase R and Neutral) and short circuit current of a 3-phase, star-connected alternator are 1000 V and 250 A respectively. Its field current is 12 A. Then the synchronous impedance of alternator will be ________.
विवृत-परिपथ वोल्टता (फेज़ R और न्यूट्रल के आर-पार मापी गई) और 3-फेज़, स्टार-कनेक्टेड अल्टरनेटर की लघु परिपथ धारा क्रमशः 1000 V और 250 A है। इसकी क्षेत्र (फील्ड) धारा 12 A है। तो अल्टरनेटर की तुल्यकालिक प्रतिबाधा ________ होगी।

Options

A

4 ohms

4 ohms

B

250 ohms

250 ohms

C

250 kilo ohms

250 kilo ohms

D

4 kilo ohms

4 kilo ohms


Solution:

Correct Answer:

A

4 ohms

4 ohms


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