Product Details
Configured for power management in generator control systems, the Woodward 9907-175 (Load Sharing Module) provides direct electrical execution of load distribution logic between paralleled power generation units and external speed controllers.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 9907-175 |
| Brand | Woodward |
| Weight | 4.08 lb |
| Dimensions | 273.6 mm x 214.1 mm x 59.2 mm |
| Operating Temp | -40 deg C to 70 deg C |
| Power Consumption | Approximately 5 W |
| Input Voltage | 18 to 32 VDC |
| PT Input Burden | 1.5 - 1.7 VA (240 VAC) / 0.4 - 0.5 VA (120 VAC) |
Actuator Loop Feedback Response and Load Management
The 9907-175 module modulates actuator loop feedback response by processing three-phase potential transformer (PT) inputs to ensure stable load sharing across parallel-connected generators. The unit is engineered to interface with Caterpillar speed controllers via 0-5 VDC speed signal references, ensuring precise frequency and load matching. Integrated protective measures include under-voltage detection, overvoltage clamping above 80 VDC, and reverse voltage protection down to -32 VDC. Thermal dissipation must be managed by ensuring adequate airflow in the control cabinet; the module is rated for Category III environments with Pollution Degree 2, requiring installation away from high humidity or excessive dust accumulation.
Frequently Asked Questions
Q: Is the 9907-175 compatible with Woodward SPM-A synchronizers?
A: Yes. The synchronization input circuitry on the 9907-175 is specifically designed to be compatible with Woodward SPM-A series synchronizers for seamless integration into multi-unit power generation arrays.
Q: What are the primary electrical protection limits for the PT inputs?
A: The three-phase PT inputs are designed for line-to-line operation at 100 to 240 VAC. Exceeding these voltage levels or operating outside the specified burden ranges can result in signal inaccuracies or internal damage to the sensing transformers.
Field Installation Guidelines
- Mounting: Secure the module using the four corner mounting points on a flat, vibration-dampened surface. Ensure the beige chassis is grounded to the control cabinet common bus to prevent electromagnetic interference.
- Wiring: Utilize shielded twisted-pair cables for all low-voltage control signals, including the 0-5 VDC speed reference. Keep these lines physically isolated from high-power AC output cabling.
- PT Connections: Verify phase sequence and voltage levels at the PT inputs before energizing. Improper phase connections will lead to unstable load sharing and potential governor instability.
- Environment: Avoid installation locations prone to condensation or high dust concentrations, as the module's ingress protection is limited. Ensure the operating ambient temperature remains within -40 deg C to 70 deg C.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Selecting the Right Cables for Industrial Automation: A Comprehensive Guide
Selecting the appropriate cabling infrastructure is critical for the success of any industrial automation project. Improper cable selection often leads to signal degradation, system instability, and costly downtime. As an automation engineer, I frequently see projects compromised by poor cabling choices in harsh industrial environments. This guide simplifies the complex landscape of cabling to help you make informed decisions for your PLC, DCS, and control systems.
Preventing Spurious Trips in Emergency Stop Systems: A Technical Guide
In industrial automation, the Emergency Stop (E-Stop) pushbutton is the ultimate safety line. However, relying on a single Normally-Closed (NC) contact can sometimes lead to unexpected spurious trips. As a control systems engineer, I have seen these nuisance trips halt entire production lines, causing significant downtime. Understanding why these components fail and how to implement robust architecture is essential for any reliable DCS or PLC-based safety system.
Sequencing Induction Motor Control with PLC Logic: Best Practices
In modern industrial automation, controlling a group of induction motors requires precision and safety. Uncontrolled simultaneous startup of multiple large motors often causes significant voltage dips, potentially triggering protective trips. Therefore, implementing a sequential startup and shutdown strategy is essential. This approach minimizes inrush current and ensures the system operates within established power constraints. A robust PLC program serves as the ideal engine for orchestrating these sequences.