Woodward 9907-345 Overspeed Protection System

FAQ

Q1: What is the main function of this system?
A1: Monitors the speed of rotating machinery and automatically trips if overspeed occurs to protect equipment.

Q2: What type of sensors are used for speed detection?
A2: Three independent MPUs (magnetic pickups) with a two-out-of-three voting logic.

Q3: What speed range can the system monitor?
A3: Frequency range 100 Hz to 32 kHz; MPU failed timeout 100 rpm to 25 000 rpm.

Q4: What are the dimensions and weight of the module?
A4: 482.6 x 311 x 143 mm; weight approx. 4.13 kg.

Q5: What is the operating temperature range?
A5: –25 °C to +60 °C.

Q6: What happens if one MPU fails?
A6: Redundant design ensures that a single MPU failure does not trigger a trip; at least two MPUs must detect overspeed.

Q7: What should be considered when selecting this system?
A7: Power supply voltage, speed detection range, installation size/weight, enclosure rating, and mechanical compatibility.

Q8: What are typical applications?
A8: Overspeed protection for generator sets, gas turbines, and critical rotating machinery; widely used in power plants, petrochemical plants, and marine systems.

9907-345 Overspeed Protection System Woodward

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