Woodward’s 9907-149 is an electronic overspeed trip device
Woodward’s 9907-149 is an electronic overspeed trip device
Woodward’s 9907-149 is an electronic overspeed trip device that senses the prime mover speed via three magnetic sensors (MPUs). Input voltage: 120 Vac/dc, in this system, each of the three speed sensing units has a separate power supply. This is part of the modular design of Woodward’s overspeed protection device, which enables functions such as hot replacement of individual units and testing of individual units without taking the prime mover offline. Electronic overspeed trip device Woodward 9907-695, 9907-530, 9907-414, 9907-409, 9907-1012, 9907-345, 9907-164, 9907-344.
9907-149 ProTech 203 Electronic Overspeed Trip Device from Woodward that senses prime mover speed through three magnetic pickups (MPUs).
9907-149 Technical Specifications
Dimensions W19in x H12.244in x D5.62in
Features Hot Replacement
Input Voltage 120 Vac/dc
Keypad/Display 1 disp
lay and keypad per module
Manual 85204
Model De-energize-to-Trip
Operating Temperature –13 to +140 °F
Standards NEMA 4/4x, IP54
ProTech model 9907-149 is a 120 Vac/dc device. There is a separate power supply for each of the three speed-sensing units in this system. This is part of the modular design of this Woodward overspeed protection device that enables such features as hot replacement of an individual unit and testing of individual units without taking the prime mover offline.
Speed-sensing units A, B, and C in model 9907-149 are identical. On top of having separate power supplies, the units also have separate operator interfaces and alarm systems. The three units are configured for a two-out-of-three voting method. Prior to this hardware vote, the three units act independently, monitoring prime mover speed with magnetic pickups (MPUs) and individually performing speed calculations.
The three units that makeup ProTech model 9907-149 must be programmed with identical trip points. PROGRAM mode is accessed with a key switch that is connected to all three units. Due to the modular design of this Woodward system, units are programmed separately.
Tunable parameters are set when the units are in PROGRAM mode. These parameters are:
Trip Speed Set Point (250 rpm to 25,000 rpm)
MPU Gear Teeth (20 to 120)
MPU Failed Timeout (1 sec to 533 min 20 sec)
MPU Failed Set Point (100 rpm to 25,000 rpm)
Trip on MPU Failure
Timer Starts on Reset
Alarm If Speed Is < MPU Failed Set Point
Other relevant models:
WOODWARD TG-13（8516-038）
WOODWARD EGCP-3 8406-113
WOODWARD EASYGEN-3500-5/P2 8440-2145
WOODWARD 9907-838
WOODWARD 9907-252
WOODWARD 9907-167
WOODWARD 9907-165
WOODWARD 9907-164
WOODWARD 9907-162
WOODWARD 9907-149
WOODWARD 9907-147
WOODWARD 9905-973
WOODWARD 8701-758 5601-1126
WOODWARD 8446-1019
WOODWARD 5501-471
WOODWARD 5501-470
WOODWARD 5501-467
WOODWARD 5466-409
WOODWARD 5466-316
WOODWARD 5466-258
WOODWARD 5464-414
WOODWARD 2301E 8273-1011
WOODWARD 8200-1302
WOODWARD 9907-1290
WOODWARD 8200-1302
WOODWARD 8440-1713
WOODWARD 8440-1849 D
WOODWARD 8440-2165 SPM-D2-11
WOODWARD 8444-1019F
WOODWARD 8521-0312 UG-10D
WOODWARD EGCP-2 8406-121
WOODWARD 9907-175IMG
WOODWARD 9905-001 SPM-A
WOODWARD 9905-020
WOODWARD 9905-144
WOODWARD 9905-726
WOODWARD 9662-810
WOODWARD 9671-810
WOODWARD 9561-810
WOODWARD 9563-810
WOODWARD 8237-1246
WOODWARD 8273-126
WOODWARD 8290-191
WOODWARD 8200-226
WOODWARD 5466-348
WOODWARD 8440-2165
