Model: 9907-147
Brand: WOODWARD
Category: Power trip overspeed protection system
Warranty: One year
Stock: available
Dimensions: 482.6 mm (W) x 310.4 mm (H) x 142.7 mm (D)
Display operating temperature: -15 to +60 °C
Features: Key lock
Input voltage: 24 volts DC

9907-147 Woodward ProTech 203 Power trip overspeed protection system. Features 24Vdc input, CPU and MPU fault indications, and lockable housing

The Model 9907-147 uses a magnetic pickup to monitor primer speed under overspeed conditions. This family of devices is susceptible to electromagnetic interference, vibration, moisture, and temperatures outside the operating temperature range of -25 to +60 °C (-13 to +140 °F). The ProTech overspeed protection model should be installed in a well-ventilated, well-ventilated, service space, out of direct sunlight, and away from high current or high voltage equipment.

This power-off trip system has a speed sensing frequency range of 100 Hz to 32 kHz and ± (0.05% x jump point, expressed in Hz +2 Hz) accuracy. The overspeed detection function is performed by three independent speed sensing units, which operate independently to monitor speed and perform speed calculations. The three units are configured in a 2-out-of-3 configuration, so prime mover trip relays occur only when at least two units detect overspeed conditions.

The ProTech overspeed protection model 9907-147 has a jump point frequency range of 250 Hz to 25 kHz. Use the interface to program trip setpoints individually for each unit (they must be programmed identically to get accurate output). Each speed sensing unit has an interface. Each has:

Two-line x 16-character LCD display
touchpad
potentiometer
LED indicator
Alarm output

2301A LSSC series
Adjust stable operation If the prime mover is stable, go to the Speed Setting Adjustment program. If the prime mover is hunting fast, slowly reduce the gain (turn the potentiometer counterclockwise) until the performance is stable. Adjusting the gain may result in an instantaneous change in speed, which can be achieved slowly by turning the potentiometer. If the prime mover is hunting at a slower speed, increase the RESET (turn the potentiometer clockwise) until the prime mover stabilizes. If adding a RESET potentiometer does not stabilize the prime mover, it may be necessary to: • Slowly reduce GAIN (turning the potentiometer counterclockwise) or • Slowly reduce GAIN and increase ACTUATOR compensation