Several parts of the metropolis were without power for hours together, after one of the electricity generating units (Unit 5) at Tata Power's Trombay plant tripped at around 9.45 am on Monday, forcing the company to switch off several feeders.

Tata Power claimed if BEST had procured power from the oil and gas-fired 500-MC Unit 6, the distribution company would have been able to meet the shortage after the tripping and the city would have not faced load-shedding.

Speaking to reporters, BEST General Manager Om Prakash Gupta said, "We do not know whether there was actual tripping or was it a forced one. Tata Power has got the licence to distribute electricity in the city limits where we currently have a monopoly. It is their responsibility to supply power to us since we do not generate electricity, which they failed to do".

"The lackadaisical attitude of Tata Power Company along with ulterior motives of poaching our consumers could be the scheme behind the current fiasco," BEST had said in a statement issued on Monday night.

According to Tata Power, had it been running the gas-fired Unit 6 of 500 mw, then it could have met the supply shortage caused by tripping of Unit 5 which is coal-fired.

"We had activated initialization activities of the 500-MW Unit 6, which we have kept on cold stand-by, with BEST's consent. The state-run discom told us that they would not buy power from Unit-6 since it is costly and so we have not been generating power. If the plant was running, the city would not have faced load-shedding after the other unit tripped," Tata Power Company's (TPC) MD Anil Sardana told reporters.

He also said TPC procured power from its hydroelectric plant as well as activated initialization of its cold stand-by Unit 6, which runs on oil and gas, to meet the shortfall.          

However, BEST has claimed that even after the failure of Unit 5, it could have met the city's load demand of 723 MW through bilateral purchase and a standby agreement.

"Due to the failure of the unit, there was non- availability of 225 MW of power from the TPC. We need not to buy power from Unit 6, since it is very costly. We will have to pay Rs 13 per unit to buy power from Unit-6 and we don't want to pass that burden onto our customers. So we have asked TPC to not to produce power from that unit," BEST's Gupta said.

Meanwhile, the state government has ordered a probe into the outage. Towards this the government has set up a panel under the state energy secretary Ajoy Mehta. The committee has to submit its report to the government in six weeks.

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