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.