A power department official said the Ghazipur 220 KV Grid broke down around 10 days ago and Uttar Pradesh Power Corporation Limited (UPPCL) was yet to restore it.
"It is their failure. We are suffering because they are yet to restore the line," said a senior official in the power department of Delhi government.
The snapping of the line has affected power supply in areas such as Patparganj, Ghazipur and Mayur Vihar and various areas in East Delhi.