 Nyora kupfuurira kweiyi ndima - SER mishumo inoshandiswa nevanjiniya vemagetsi kuongorora magetsi makuru uye maduku emagetsi. Pashure pokudzimwa kwemagetsi kweNortheast muna 2003, North American Electric Reliability Corporation NERC yakatsanangura kuti magetsi emagetsi anofanirwa kuiswa nguva kusvika kune yakanyanya millisecond. 