The Zambian interconnector gains voltage support, and Katangan mines gain a question about firm import capacity.

For a mine or smelter drawing power in Haut-Katanga, the cross-border link that backs its supply is being rebuilt while it is still carrying load. The Congolese state utility SNEL SA has published its own account of an inspection of strategic infrastructure at Lubumbashi, dated 27 August 2026 and posted on 4 September 2026, following an earlier leg in Lualaba.

The Karavia substation is the Congolese end of the interconnector with Zambia, and the utility puts the power presently moving across it at about 300 MW. Work there includes fitting a static reactive power compensation system, the SVC: equipment that steadies voltage by supplying or absorbing reactive power as load shifts. The utility states that it is intended to improve the stability and voltage regulation of the network, and in time to raise the transit capacity of the interconnection above its present level.

At the NRK substation, the same inspection covered an installation that supplies several outgoing circuits along with large industrial and mining customers, and which the utility treats as essential to continuous and reliable supply at Lubumbashi. Karavia itself also holds a 50 MVA transformer feeding part of a Lubumbashi residential quarter.

Read together, these two stops put the utility's attention on the equipment that carries an import across the border and on the substation that feeds mining load directly, with voltage quality the common thread. The implication is that cross-border electricity trade into the copper belt is bounded by reactive power and voltage control at the border as much as by the megawatts available at either end.

For large power users, an import route whose headroom depends on voltage support equipment is worth understanding before it is leaned on as backup. It is worth asking your supplier what firm capacity the route can carry while the work proceeds, and whether outages at either substation are reflected in the interruption terms of your supply agreement. The in-service date for the compensation equipment is the one to watch.