Q. 57 The coils are to be connected to obtain a single-phase 
, auto-transformer to drive a load of 10 kVA. Which of the options given should be exercised to realize the required auto-transformer ?
The figure above shows coils-1 and 2, with dot markings as shown, having 4000
and 6000 turns respectively. Both the coils have a rated current of 25 A. Coil-1 is
excited with single phase, 400 V, 50 Hz supply
(A) Connect A and D; Common B
(B) Connect B and D; Common C
(C) Connect A and C; Common B
(D) Connect A and C; Common D
Answer:(A)
Explanation:
