The NSW Government has called an urgent meeting with an energy company after a second major power outage hit Sydney's CBD in less than a week, with an angry premier declaring ``it's not good enough''.

Power company EnergyAustralia has apologised for the second major disruption to Sydney's power supply this week, which affected about 50,000 homes and businesses.

Properties in the northern part of the city, along with parts of eastern and inner city suburbs, were blacked out at 10.28am on Saturday.

Emergency services were called to people trapped in lifts, the harbour tunnel was closed and traffic lights were blacked out.

EnergyAustralia staff re-routed power into the city from other parts of the network, and service was restored to all areas in about an hour, EnergyAustralia said in a statement.

http://www.smh.com.au/national/power-company-sorry-for-second-blackout-20090404-9s9k.html