Edu lab laboratory bench power supply 0 to 15v rvfm 605 055 output voltage selected by up down push switches in 1v steps up to 15v voltage can be switched safely at full load without serious contact wear output protection is handled by a 30a heavy duty relay the outputs are opened momentarily controlled by microprocessor between switching times fully protected secondary by high speed microprocessor controlled and resettable electronic trip over current is measured and timed for cases