TCN Announces Phased Power Outage for SCADA Tests at Nsukka–New Haven Substation By Raymond Enoch

The Transmission Company of Nigeria (TCN) has announced a planned, phased power outage at the Nsukka–New Haven 132kV Transmission Substation from November 5 to 10, 2026, to facilitate Supervisory Control and Data Acquisition (SCADA) pre-commissioning tests on substation equipment.

In a statement signed by the management of the Transmission Company of Nigeria (TCN) on November 3, 2026, the company said the exercise would be conducted by its contractor to ensure the necessary tests are completed ahead of the commissioning of the SCADA system.

According to TCN, the outage will be implemented in phases, with power interruptions restricted to areas directly affected by the work at any given time, while other areas will continue to receive bulk electricity supply.

The company explained that the phased approach is intended to limit the impact of the technical exercise on electricity supply and reduce the extent of disruption to customers within the affected service areas.

TCN, however, clarified that there would be no outage on Sunday, November 8, and Tuesday, November 10, 2026, as the pre-commissioning activities continue.

During the exercise, MainPower Electricity Distribution Limited (MEDL) will be unable to supply electricity to customers served by the Nsukka 132kV Substation, the University of Nigeria, Nsukka, as well as the Orba and Sumas 33kV feeders on the affected days.

The planned exercise forms part of the technical preparations required to test and verify the operational readiness of the substation’s SCADA equipment. Such systems are essential to modern power transmission infrastructure, supporting remote monitoring, data acquisition and control of electrical network operations.

When effectively deployed, SCADA technology can enhance operational visibility, improve fault detection and response, and strengthen the monitoring of transmission facilities, thereby supporting more efficient electricity network management.

TCN apologised to electricity consumers in the affected areas for the inconvenience the planned outage might cause, urging them to make necessary arrangements during the period of the exercise.

The company reiterated that the work would be undertaken in phases to ensure that power interruptions remain limited to the areas directly affected by the activities at each stage.