Due to the tripping of Mangla and sudden departure from the power system, the power frequency fell below 50, sources said.

Due to the tripping of Mangla and sudden departure from the power system, the power frequency fell below 50, sources said.

All other powerhouses were shut down one after the other due to sudden fall in power frequency
Sources

The complete breakdown occurred due to cascading across the country, sources said

It takes several hours to restore the system, sources said

The power of a powerhouse will be run first and the frequency will be monitored, sources said.

If the power frequency goes above 50 and becomes stable, it will be added to the system, sources said.

Electricity from all other powerhouses will also be added to the system one after the other under the same system, sources said.
It will take several hours to restore the entire system. Resources