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OVERSPEED PROTECTION / DIGITAL TRIP ARCHITECTURE
9907-151
Woodward ProTech® 203 Overspeed Protection System
The 9907-151 is the 220 Vac de-energize-to-trip version of the ProTech 203 overspeed protection family. The system uses three independent speed-sensing units, each associated with an individual magnetic pickup, and determines the trip output through a hardware two-out-of-three voting arrangement.
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PRODUCT PROFILE
Protection Built Around Voting Logic
The ProTech 203 is a digital overspeed trip system designed to read three individual magnetic pickups, calculate speed independently, and actuate its relay output according to a hardware two-out-of-three vote. For 9907-151, each of the three system units uses a 220 Vac power input configuration. Each unit contains its own power supply, supporting the independent architecture of the three sensing paths. |
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SERIES RELATIONSHIP
ProTech 203 Family Position
The 9907-151 belongs to the de-energize-to-trip ProTech 203 configuration family. The principal difference among the 9907-147, 9907-149 and 9907-151 models in this family is their nominal power-input class. |
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PURCHASE / TECHNICAL INQUIRY
Need 9907-151?
Send the exact part number, required quantity, destination, required date and application details. Our team can help verify the requested configuration before order processing.
Part Number: 9907-151 Series: ProTech 203
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Can Woodward 9907-151 be matched directly by the 220 Vac requirement?
Yes. The 9907-151 is the ProTech 203 de-energize-to-trip model specified for 220 Vac input, with an input range of 180–264 Vac per unit and 16.4 VA power requirement.
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| 02 |
Does Woodward 9907-151 use three independent speed signals?
Yes. ProTech 203 uses three separate speed-sensing units connected to three individual magnetic pickups. Each sensing path performs its own speed calculation before the hardware voter determines the trip output.
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How should Woodward 9907-151 be evaluated when replacing an existing ProTech unit?
The replacement check should include the exact part number, power class, trip philosophy, MPU arrangement, programmed trip point, MPU settings, gear-tooth count, wiring and installed relay interface. Matching only the enclosure or series name is not sufficient.
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Can Woodward 9907-151 be tested without taking the prime mover offline?
The ProTech 203 incorporates a built-in frequency generator that permits each speed-sensing unit to be tested individually while the prime mover is online. The system also provides relay status LEDs and speed readout for the test process.
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What programmed settings should be checked for Woodward 9907-151 during configuration?
Important configurable values include the trip speed setpoint, MPU failed setpoint, MPU failed timeout, MPU gear teeth, trip-on-MPU-failure selection, timer-start-on-reset selection and the low-speed alarm option. The three units should be programmed for identical trip points.
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AFTER-SALES
Return / Replacement
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01. Please contact us within 7 days if you have any question after you receiving the items.
02. The returned items has to be in its original condition, specific reason for the return, we will issue a return or replacement for your order after we received the returns.
03. The buyer is responsible for all the shipping cost incurred.
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