Description
Product Datasheet & Technical Parameters
- Brand: WOODWARD
- Model: 9907-175
- Series: LSM (Load Sharing Module) Series
- Product Name: Load Sharing Module
- Manufacturing Origin: United States
- Physical Condition: Brand New / Factory Sealed
- Dimensions: 273.6 \times 214.1 \times 59.2 mm (10.77 \times 8.43 \times 2.33 in)
- Weight: Approx. 1488 g (52.5 oz) for AC models
- Country of Origin: USA
- Power / Input Rating: AC Power Input (100–240 VAC, 50–400 Hz, approx. 10W), 3-phase PT Inputs (95–130 or 190–260 VAC line-to-line), 3-phase CT Inputs (3–7 Arms full load), UL Listed & CE Marked
Product Overview & Introduction
The WOODWARD 9907-175 is an industrial-grade Load Sharing Module (LSM) designed for precise real power load management and synchronization in multi-generator systems. Frequently utilized in setups integrating specialized engine controls (such as Caterpillar and Woodward configurations), this module provides both isochronous and droop load-sharing capabilities. By processing 3-phase potential transformer (PT) and current transformer (CT) inputs alongside synchronization and load-sharing lines, it ensures stable and accurate power distribution across parallel generator sets.
Operational Specifications & Guidelines
Prior to installation or handling, ensure that all electrical power sources, busbars, and control circuits are completely de-energized and locked out to prevent electrical shock or arc flash hazards. Because the unit contains static-sensitive components, technicians must discharge body static to a grounded metal object before touching the device. Mount the 9907-175 module securely inside an appropriate IP43 protective panel enclosure (to maintain CE compliance), keeping it clear of synthetic clothing or insulating plastics. Connect the 100–240 VAC power supply, 3-phase PT sensing lines, CT inputs, and speed control output lines strictly in accordance with the manufacturer’s wiring schematics. Verify all terminal torques and system grounding integrity prior to restoring power.
Startup & Shutdown Sequencing
To prevent generator overspeed, out-of-phase synchronization, or system instability, operators must strictly follow the defined startup and shutdown procedures.
- Startup Sequence:
- Verify all external wiring, PT/CT inputs, control power connections, and safety interlocks are securely fastened.
- Energize the control power supply to the WOODWARD 9907-175 module and verify normal internal operation.
- Start the prime mover and allow it to reach rated nominal speed and thermal stability under governor control.
- Enable the load sharing and synchronizing lines to monitor bus and generator parameters.
- Engage parallel load-sharing mode, allowing the LSM to execute precise speed bias adjustments and distribute active real power evenly across the generator network.
- Shutdown Sequence:
- Gradually transfer active electrical load away from the generator set back to companion units or the main utility grid until minimum baseline load is reached.
- Open the generator circuit breaker manually or via system command to isolate the unit electrically from the busbar.
- Initiate the prime mover cool-down cycle at idle speed for the required duration.
- Issue the stop command to shut down the engine or turbine completely.
- De-energize the auxiliary control power to the module only after the prime mover has come to a complete standstill.
Frequently Asked Questions (Q&A)
- Q1: What are the primary operating modes supported by the WOODWARD 9907-175?
- A1: The module supports both isochronous and droop load-sharing capabilities for engines operating in parallel generator applications.
- Q2: What power supply and voltage inputs does this model accept?
- A2: It accepts an AC power input ranging from 100–240 VAC (50–400 Hz), alongside 3-phase PT voltage inputs (jumper-selectable for 95–130 or 190–260 VAC line-to-line) and 3-phase CT inputs.
- Q3: What specific cross-system application is the 9907-175 often used for?
- A3: It is widely utilized to facilitate seamless load sharing and integration between Caterpillar-controlled engine systems and Woodward-controlled power accessories.
