Chandigarh: Haryana and Uttar Pradesh were indulging in heavy overdrawls from the Bhakra Beas Management Board (BBMB) grid when it collapsed yesterday. What’s worse, Haryana continued to overdraw heavily today too when the system collapsed again. BBMB sources said though the reason for the successive collapse will be investigated by the Northern Regional Load Despatch Centre (NRLDC), jerks due to overdrawals could be one of the reasons for the grid failure. The sources said the constant overdrawals by partner states had been debated at NRLDC meetings this summer. Sources said Haryana was withdrawing 25 per cent more than its schedule yesterday, Uttar Pradesh 20 per cent and Punjab 5 per cent. They said when the grid collapsed today, Haryana was withdrawing 22 per cent more than its schedule, UP 6 per cent and Punjab 1 per cent. BBMB Member Power Ashok Thapar said the system had been restored completely by 6 pm today. He said power supply had been facilitated to the thermal plants of Punjab and Haryana which had a totalled installed capacity of 4,000 MW. He said power supply had also been facilitated to NHPC’s Bairasuil thermal plant. Thapar said as of 7 pm, the BBMB’s total generation was 2,146 MW against the schedule supply of 1,547 MW. BBMB sources said in July, Haryana had withdrawn 17 per cent more than its schedule, UP 31 per cent and Punjab 4 per cent. The sources said overdrawals by UP have been a source of concern for the BBMB management with the state overdrawing by as much as 50 per cent on occasions during June-July. Punjab has an average base schedule of 4,700 MW while Haryana and UP have a base schedule between 1,500 and 2,000 MW. PSPCL sources said Punjab had not gone in for overdrawals from the grid as it was meeting its power requirements by going in for short-term power purchases. The state has already purchased power worth Rs 6,500 crore this year.