Ukraine grid: only 1/3 of key transformers protected; insider threat flagged

A Ukrainian lawmaker reports that only one-third of main transformers at Ukrenergo's 84 substations are protected by concrete sarcophagi, leaving the grid vulnerable to Russian strikes. The lawmaker also warns that the biggest threat may come from inside the system, suggesting potential sabotage or insider compromise. This highlights persistent critical infrastructure fragility amid ongoing conflict.

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