Spring powered electrical switching apparatus with anti-rollover cam

Electrical switching apparatus comprising:

• at least one pole having separable contacts comprising fixed contacts and moveable contacts and a carrier mounting the moveable contacts for movement to open and close the separable contacts;
• and
• an operating mechanism for moving the carrier of each pole between open and closed positions to open and close the separable contacts, the operating mechanism comprising:
• a spring assembly;
• a cam assembly coupled to and rotated by the spring assembly and comprising a cam shaft and a drive cam mounted on the cam shaft, the drive cam having a cam profile with a tip from which the cam profile falls off to form a reset cavity;
• a drive coupling connected to the carrier;
• and
• a latch mechanism selectively latching the drive coupling into engagement with the drive cam profile to drive the carrier to the closed position as the drive cam is rotated by the spring assembly, and to unlatch the drive coupling allowing the drive coupling to drop into the reset cavity and move the carrier to the open position, the cam assembly including an anti-rollover cam moveable relative to the drive cam to an extended position extending the drive cam profile circumferentially beyond the tip to prevent rollover of the drive coupling into the reset cavity with the drive coupling latched, but retracting with the drive coupling unlatched and dropped into the reset cavity.