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NEPRA's inquiry report on power breakdown: Bolted fault at Guddu caused power system collapse

NEPRA's inquiry report on power breakdown: Bolted fault at Guddu caused power system collapse
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NEPRA releases inquiry report on power breakdown

NEPRA releases inquiry report on power breakdown
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Most of the thermal power plants were synchronized with NTDC within 27 hours: NEPRA
ISLAMABAD (Dunya News) - The National Electric Power Regulatory Authority (NEPRA) has released inquiry report on major power breakdown in the country.
According to the report, on 09th January, 2021 at 23:40 hours, on closing of a 220kV Circuit Breaker at Guddu switchyard, bolted fault occurred as the earth switch of related Isolator was left closed.
This bolted fault was not cleared due to malfunctioning of the relevant Circuit Breaker and the subsequent breaker failure scheme. The above persistent fault reflected on 220kV and 500kV transmission lines which tripped on Distance Relays in zone 2 and Unstable Power Swing respectively. ....

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