"I can't see how load pulses are generated, so I can't answer your question. I don't see anything connected to the left side of the transformer. Unless the firing of the triac somehow generates the load pulses, there is no timing relationship between the load pulses and the clock pulses since the timer is free running. As the shematic is drawn, with nothing connected to the left side of the transformer, or no voltage source connected to the right side of the transformer, the triac will never conduct. Assuming the timer is connected as a proper astable multivibrator its output frequency is 18 Hz with a 7 ms negative going pulse, high most of the time. I can't tell what the frequency of the load pulses is since I can't see anything that generates them."
transformer is connected to 220 v AC supply and the transformer is a 220v/6-0-6v transformer.The load pulses are generated by transistor parts and signal is transferred to counter as load pulses.I think load pulses are generated to fire the triac. the firing of triac donot generate any load pulses. Plz tell now the operation of load pulses.