A battery of 200 V having 0.5 Ω resistance is connected as shown in fig. Supply is three - ϕ 230 V, 50 Hz.
The charging current is 20 A and battery is connected in series with inductance L.
If it is desired to supply power from battery to source, find the firing angle delay for the same current.
Enter numerical value using the virtual keypad. Round off where necessary.