Mahatransco (Maharashtra State Electricity Transmission Company Limited - MSETCL) Chairman and Managing Director Dinesh Waghmare said Tata Power's plants took time to start generating electricity following the grid collapse on Monday morning, resulting in the specially created 'islanding' system not working.
Train movement halted between Andheri and Churchgate railway stations as the power supply stopped, Western Railway's chief public relations officer Sumit Thakur said.
Railway services across city on the Western Railway and Central Railway came to a grinding halt at 10.05 am, as a result of the power outage.
Suburbs like Bandra, Santacruz and Chembur, and pockets in central Mumbai such as Dadar reported the outage for over 15 minutes starting at 2130 hrs.
The power failure comes at a time when the state is reeling under power deficit.