Woodward ProTech 203 Overspeed Protection System 简介Description The ProTech 203 Overspeed Protection System is a digital overspeed trip device that senses prime mover speed through three magnetic pickups (MPUs). It consists of three identical, independent, speed-sensing units which continuously monitor prime mover speed and activate a trip relay when an overspeed condition is detected. The trip relays of the three units are connected in a two out-of-three voting configuration so that if any single unit fails, the ProTech system will still provide the correct output. The units' functions include the abilityto display the actual speed from each speed probe, display the highest speed signal, on-line testing, and modular design that allows a single failed unit to be replaced while the device is running. Light emitting diodes (LEDs) and digital displays on the unit front panel indicate the functional status.
