nirupa asked in Science & MathematicsEngineering · 10 years ago

# The power delivered to the load in maximum when the SCR firing angle is?

The power delivered to the load in maximum when the SCR firing angle is

(a) Zero

(b) 90

(c ) 180

(d) Between 90 and 180

Relevance
• 10 years ago

Zero.

If the SCR fires immediately (at zero time, at the beginning of each cycle), then it is 'on' for a full 1/2 cycle (or a full cycle for a TRIAC). A full 1/2 cycle is the most time the SCR can be 'on' , so max. power is delivered.

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• 10 years ago

The power delivered to the load is maximum when the SCR firing angle is at 90° ( or 270° ) .

Voltage and current are near maximum values at that moment in time.

Maximum deliverable energy occurs immediately following the zero crossing at 0° and 180°.

• caison
Lv 4
3 years ago

it will strengthen the final capability. by utilising reducing the firing attitude to 0 you're triggering the SCR previous to in case you waited for the ninety degree ingredient. 0 is on the commencing up of the sine wave the place the 0 pass ingredient is. ninety ranges is on the peak of the 1st a million/2 of the cycle. in case you positioned off at ninety ranges you basically have the relax a million/2 of the cycle (from ninety to a hundred and eighty ranges) for conduction. Triggering at 0 ranges the finished a million/2 of the cycle (0 to a hundred and eighty ranges) is carrying out.