Con Edison Averts Wide Blackout By Cutting Power in Westchester
4 Con Ed generators are knocked out on Sept 26, apparently by lightning, but co avoids systemwide failure by instituting 8% voltage reduction, blacking out 130,000 customers in Westchester and north Bronx, firing up gas turbines, obtaining extra power from Lilco and Public Service and issuing appeals for conservation; some measures and procedures instituted since July blackout are credited by co with helping avert recurrence; pres Hauspurg comments; map of blacked-out areas (M)
