Woodward 9907-167 505E Steam Turbine Control

Key Technical Specifications

Woodward’s documentation identifies 9907-167 alongside 9907-165 and 9907-166 as the three 505E power-input variants: 9907-165 uses 180–264 VAC, 9907-166 uses 88–132 VAC or 90–150 VDC, while 9907-167 uses 18–32 VDC.

Product Introduction

The Woodward 9907-167 505E Digital Governor is a digital control unit for steam turbines with controlled extraction and/or admission pressure control. Woodward’s 505E documentation covers installation, configuration/programming, operating procedures, service mode, and hardware specifications.

The key identification point is the low-voltage DC power configuration. The 9907-167 accepts 18–32 VDC, while the closely related 9907-165 and 9907-166 use different power-input configurations. Treat those part numbers as different hardware variants rather than interchangeable units.

9907-167

9907-167

Installation & Configuration Guide

Stage 1: Pre-Installation Preparation — About 10 Minutes

⚠️ Safety First: Place the steam turbine and associated control system in the approved maintenance state. Apply LOTO and follow the plant’s turbine shutdown procedure before removing the governor.

Woodward documentation also identifies hazardous-area requirements for applicable installations. Field wiring and connected equipment must meet the requirements for the actual installation location.

Tools Required:

• ESD wrist strap
• Digital multimeter
• Insulated screwdriver
• Wire labels
• Smartphone/camera
• Approved Woodward 505E documentation

Data Backup:

1. Record the complete 9907-167 part number and hardware revision.
2. Photograph the front panel and all terminal connections.
3. Record the turbine application and extraction/admission configuration.
4. Document actuator assignments.
5. Record relay and programmable-current-output assignments.
6. Save the existing 505E configuration/program where the installed system permits it.
7. Photograph all field wiring before removal.

Stage 2: Removing the Existing Governor — About 10 Minutes

1. Confirm the turbine is shut down and mechanically safe.
2. Isolate the 18–32 VDC control supply.
3. Verify the supply is de-energized with a multimeter.
4. Label all field wiring.
5. Photograph each connector and terminal group.
6. Disconnect actuator wiring.
7. Disconnect relay and analog/current-output wiring.
8. Disconnect auxiliary communication/control wiring where installed.
9. Remove the governor from its mounting arrangement.

⚠️ Do not disconnect wiring based solely on terminal position. Record the actual installation before removal. Legacy turbine panels frequently contain field modifications.

Stage 3: Installing the New 9907-167 — About 10 Minutes

1. Verify the replacement is specifically 9907-167.
2. Confirm the nameplate and hardware revision.
3. Check that the supply system is compatible with 18–32 VDC.
4. Mount the governor securely.
5. Reconnect the two actuator channels according to the approved drawing.
6. Reconnect the eight relay circuits where used.
7. Reconnect the six programmable current-output circuits where used.
8. Verify every termination against the original photographs.
9. Check that field wiring meets the applicable hazardous-area requirements.
10. Secure all terminals before applying power.

Configuration Clone — Critical:

• Turbine speed settings
• Extraction/admission control parameters
• Actuator configuration
• Valve limits
• Acceleration/deceleration settings
• Load-control settings
• Relay assignments
• Analog/current-output assignments
• Alarm and trip configuration

Woodward’s manual states that the 505E provides configuration/programming functions and that the 9907-167 is one of the specific hardware variants covered by the manual.

Self-Checklist:

• Exact 9907-167 verified
• 18–32 VDC supply confirmed
• Actuator channels checked
• Relay wiring checked
• Programmable current outputs checked
• Configuration backed up
• Turbine application parameters verified
• Hazardous-area wiring requirements satisfied

Stage 4: Power-On & Testing — About 15–30 Minutes

1. Perform a point-to-point wiring check.
2. Verify the DC supply voltage before energizing.
3. Power the 505E without initiating a turbine start.
4. Check the keypad/display for startup diagnostics.
5. Verify the controller configuration.
6. Confirm actuator channel assignments.
7. Verify relay and current-output status.
8. Confirm the governor recognizes the programmed turbine configuration.
9. Start the turbine under the approved commissioning procedure.
10. Verify speed control at the required operating point.
11. Check extraction/admission control.
12. Verify alarms, shutdown logic, and independent protection systems.

⚠️ Do not treat successful controller startup as proof of correct turbine control. Verify actuator direction, valve response, speed regulation, extraction/admission response, and trip functions under controlled commissioning conditions.

Frequently Asked Questions (FAQ)

Q1: What is the Woodward 9907-167?
It is a Woodward 505E Digital Governor for steam turbines with controlled extraction and/or admission pressure control. Woodward’s official manual lists 9907-167 as one of the English-version 505E part numbers.

Q2: What power supply does 9907-167 use?
The 9907-167 uses 18–32 VDC. This distinguishes it from the 9907-165 and 9907-166 505E variants.

Q3: What is the difference between 9907-165, 9907-166, and 9907-167?
They are 505E hardware variants with different power inputs:

• 9907-165: 180–264 VAC
• 9907-166: 88–132 VAC or 90–150 VDC
• 9907-167: 18–32 VDC

These differences are explicitly documented by Woodward.

Q4: What turbine applications use the 505E?
The 505E is designed for steam turbines with controlled extraction and/or admission pressure control. It is not simply a generic engine governor.

Q5: Does the 9907-167 have actuator outputs?
Yes. Available technical documentation identifies two actuator outputs, along with eight relay outputs and six programmable current outputs.

Q6: Can I substitute a 9907-165 or 9907-166 for a 9907-167?
Do not make that substitution without an engineering review. Their power-input requirements are different. Installing the wrong voltage variant can damage equipment or prevent the governor from operating correctly.

Q7: Is 9907-167 obsolete?
At least one industrial parts supplier lists 9907-167 as discontinued by the manufacturer, while other suppliers continue to advertise new, surplus, or repair/replacement units. For procurement, distinguish between OEM-new, new surplus, refurbished, and repaired stock rather than assuming all listings represent current factory production.