New Delhi: Entire Delhi went without power for the second successive day on Tuesday as the Northern Grid tripped again, crippling various essential services such as Metro rail, trains and water distribution system in the city.

Top Delhi Government officials said the situation became complex compared to Monday with tripping of the Eastern Grid also and it may take a couple of hours to restore supply to the essential services.

The officials said the Northern Grid failed at around 1:30 PM when the national capital had a demand of around 4,300 MW. Only 38 MW was being supplied at around 1:45.

A Power department official said various power generation plants running on hydel, coal and gas had to shut operations due to the tripping of the grid.

Metro services hit

Metro operations came to a standstill following the collapse of the grid but operations at the Delhi airport remained unaffected.

"Due to the Northern Grid failure, all trains services have been suspended. Trains are being brought to the nearest station for evacuation," a Metro station official said.

Disrupted airport services

An airport spokesperson said all essential services were shifted to the diesel generating back-up system.

Massive traffic jams

Traffic signals went blank in the city leading to traffic chaos in the entire city.

Trains halt

Trains services and functioning of various hospitals have also been affected due to the outages.

No water

The water distribution system was another casualty of the power cut as functioning of all major water treatment plants across the city came to a halt.

A Delhi Jal Board official said operations at six water treatment plants in the city have been seriously affected due to outages.

Delhi went without power for about eight hours on Monday following collapse of the Grid which affected almost all the essential services.

Officials said Power Minister Harun Yusuf is constantly monitoring the situation and officials are in touch with the Union Power Ministry and Power Grid Corporation, which maintains the Northern Grid.

Delhi government on Monday had accused Uttar Pradesh, Haryana and Punjab for overdrawing power from the Northern Grid saying it led to its collapse, and urged the Union Power Minister to direct the states to follow grid discipline.

Chief Minister Sheila Dikshit and Power Minister Harun Yusuf had met Union Power Minister Sushil Kumar Shinde and requested him to direct the states to maintain discipline while drawing power from the Northern Grid.

The Northern Grid, which caters to power supply in nine states and Union Territories -- Punjab, Haryana, Rajasthan, Delhi, Uttar Pradesh, Uttarakhand, Himachal Pradesh, J&K and Chandigarh -- had collapsed at 2.35 AM on Monday.

Patient services remain unaffected

Meanwhile, in a sight of respite, the patient care in the capital remained unaffected in all major hospitals.

According to authorities in central and Delhi Government hospitals here, there was no complain of any hindrance in patient care following the power supply failure that crippled the city for sometimes.

"I have checked with major hospitals and they have confirmed that they have good back-up to deliver services," Anshu Prakash, Principal Secretary, Health and Family Welfare, Delhi government, said.

He said, "Delhi hospitals have diesel back up. These are pressed into operation in case of power failure. Sufficient diesel stocks are available. There is no reason to panic.

"Services in critical areas such as operation theatres and emergency departments are not affected. Even in wards lighting arrangement and fans are functioning."

Authorities in hospitals like All India Institute of Medical Sciences, Safdarjung hospital, Ram Manohar Lohia hospital and Lady Hardinge Medical College amongst others spoke of back-up systems being in operation.

"We have generator back up for all units. All surgeries in the operation theatres are continuing and will go on smoothly," D K Sharma, Medical Superintendent, AIIMS, said.

(JPN/Agencies)

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