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Grid infrastructureNigeriaEIR-1346

Line tripping at Egbin substation disrupts power supply

Aug 2024Published 28 Sept 2026Responsible editor: Chief Editor

SignificantElectrical
Estimated damageEstimated by the register's adjusterHow? Know the real figure?
Figure hidden: shown to subscribersMedium confidence
supply cut for about •• daysShown in the record →Full estimate
From the recordRoot cause hiddenFailed part hidden
Where
Egbin Transmission Substation switchyard
What
Arcing on Benin-Egbin 330kV line isolator fingers
Cause
Heavy system surge
Outcome
Supply restored by 6:10 p.m. same day

Companies named in the reporting of this entry (being named is not a finding of fault): Transmission Company of Nigeria

What happened

At about 2:47 p.m. on 5 August 2024 a heavy system surge caused arcing on the Benin-Egbin 330kV line isolator fingers at the Egbin Transmission Substation switchyard. The resulting line tripping affected outgoing lines from the substation and led to loss of supply to some areas. The Transmission Company of Nigeria stated that the event did not constitute a national grid collapse. Power supply was restored to affected areas by 6:10 p.m. the same day after the line tripping was rectified.

Contributing factors

Heavy system surge leading to arcing of the Benin-Egbin 330kV line isolator fingers.

Lessons learned

  1. 330kV line isolator fingers must resist system surges without arcing, so operators should check contact condition and alignment on similar assets.
  2. Line isolator faults at substations require fast local repair to limit outage spread, so plans should include spare parts and trained crews on site.
  3. Clear statements from the grid operator prevent wider alarm during local trips, so protocols should cover rapid public updates.

More lessons on electrical protection and isolation, spacing, layout and fire spread, detection and monitoring, from every incident on the register.

Not yet known

  • Root cause of the system surge
  • Age and model of the isolator
  • Cost of repairs and lost supply

This entry is updated when these are reported. Get an alert for the next one like it.

Source

techeconomy.ng

Other entries that name Egbin

Published 2026-09-28. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.

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