Woodward V90TD-3040-MBR 9907-1797 Industrial Turbine Actuator

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 ability

to 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's front panel indicate the functional status.

Be careful when unpacking the ProTech® 203 system. Check the device for signs

of damage such as a bent or dented case and loose or broken parts. If damage

is found, notify the shipper immediately. The device may be stored in its original

shipping container until it is ready for installation. Protect the device from weather

and from extreme humidity or temperature fluctuations during storage.

Carefully study this chapter before choosing a location for the ProTech 203

system. Wiring and grounding considerations may influence the selection of a

location for the device.

Consider the following general requirements when selecting the location:

 Adequate ventilation for cooling

 A location that will provide an operating temperature range of –25 to +60 °C

(–13 to +140 °F)

 Space for servicing

 Protection from direct exposure to sunlight, water, or to a condensation

 prone environment

 Protection from high-voltage or high-current devices which produce

electromagnetic interference

 Avoidance of vibration