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