South Africa’s Eskom said on Friday it had suspended managers at two of its power stations after breakdowns which forced the utility to ramp up rolling blackouts earlier this week to avoid tripping the national grid. Eskom, which has implemented rotational powercuts on and off for more than a decade due to infrastructure failures largely blamed on years of inadequate maintenance, said its group chief executive André de Ruyter suspended the managers at the Tutuka and Kendal stations on Thursday morning pending disciplinary inquiries.