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Phone: +86 16626708626Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 8237-2600 |
| Manufacturer | Woodward |
| Product Type | ProTech GII Overspeed Protection Module |
| Mounting Type | Panel Mount (door-mount housing) |
| Relay Configuration | Voted Relays (2-out-of-3 voting) |
| Voltage Rating | HV/HV (High Voltage / High Voltage) |
| Speed Probe Type | Active speed probes supported (not passive MPU only) |
| Application | Gas turbines, diesel engines, generator sets |
| Industry Use | Power industry, petrochemical, general automation |
| Product Status | Discontinued |
| Upgrade Path | 8237-2601 (Field Software Conversion Kit available: 8929-039) |
| Country of Origin | USA |
| Dimensions | 250 mm × 220 mm × 180 mm |
| Shipping Weight | 2.3 kg |
| Warranty | 12 months / 365 days |
| Safety Function | Overspeed and overacceleration trip protection |
Product Introduction
Woodward 8237-2600 is a ProTech GII panel-mount overspeed protection module designed for gas turbines, diesel engines, and generator set units. It provides precise speed monitoring and 2-out-of-3 voted relay outputs to safely shut down turbines upon sensing overspeed or overacceleration events.
This module features HV/HV (High Voltage/High Voltage) rated voted relays and a door-mount housing suitable for panel installation. It supports active speed probes and is used in the power industry, petrochemical, and general automation applications. The unit is discontinued, so stock is limited to new surplus inventory. Woodward offers a field software conversion kit (8929-039) and upgrade path to 8237-2601 for existing installations.
- 8237-2600
- 8237-2600
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No trip on overspeed condition | Speed probe failure, wiring fault, or relay fault | ✅ High | Measure probe signal with oscilloscope; check relay coil voltage | Verify probe signal first; replace probe or wiring if no signal present |
| Trip relay not energizing | Relay coil failure or control power loss | ✅ High | Measure 24 VDC at relay coil terminals; check control power | Verify control power; replace relay module if coil is open |
| Active probe not detected | Probe power failure or probe mismatch | ✅ High | Check probe excitation voltage (typically 18–30 VDC); verify probe type | Confirm active probe is powered; replace probe if no excitation voltage |
| Speed Fail Trip not used (warning) | Configuration mismatch with active probes | ✅ High | Check ProTech configuration: Speed Fail Trip must be “USED” with Active probes | Update configuration per Woodward Service Bulletin 01671 if using Active probes |
| Multiple faults cause protection lapse | Configuration issue with active probes and Speed Fail Trip | ✅ High | Review configuration: Active probes + Speed Fail Trip “NOT USED” = risk | Set Speed Fail Trip to “USED” whenever probe type is “Active” per Woodward recommendation |
| Red LED or alarm on module | Input fault or configuration alarm | ✅ High | Read diagnostic buffer via configuration software; check LED status | Review alarm conditions; update configuration if required by service bulletin |
| Relay contact welded or stuck | Frequent tripping or overload condition | ✅ High | Measure relay contact resistance; check for welding | Replace module if contacts are welded; investigate root cause of frequent trips |
⚠️ Critical Service Bulletin Alert: If your ProTech GII uses Active speed probes (not passive MPU) and Speed Fail Trip is set to “NOT USED,” you may have a lapse in overspeed protection if multiple faults occur. Modify your configuration to set Speed Fail Trip to “USED” whenever probe type is “Active”.
Contact Woodward Turbine Help Desk at 1-970-498-3095 or [email protected] with photos and diagnostic logs for OEM support.
Frequently Asked Questions
Q: Is the Woodward 8237-2600 still in production?
A: No, it is discontinued. Stock is limited to new surplus inventory. Woodward offers an upgrade path to 8237-2601 and a field software conversion kit (8929-039) for existing installations.
Q: What does this module do?
A: It provides overspeed protection for gas turbines, diesel engines, and generator sets. It monitors speed via active probes and trips 2-out-of-3 voted relays to safely shut down the turbine when overspeed or overacceleration is detected.
Q: What is the difference between 8237-2600 and 8237-2601?
A: The 8237-2600 is HV/HV (High Voltage/High Voltage) with voted relays and door-mount housing. The 8237-2601 is also HV/HV with voted relays and door-mount housing, but it is the upgrade version. A field software conversion kit (8929-039) is available to upgrade from -2600 to -2601.
Q: Can I use passive MPU probes with this module?
A: Yes, but the module is designed for active speed probes. If you use passive MPU probes, the Speed Fail Trip setting does not matter. However, if you use Active probes, Speed Fail Trip MUST be set to “USED” to maintain overspeed protection.
Q: What is the 2-out-of-3 voting system?
A: The module uses 2-out-of-3 voted relay outputs, meaning at least 2 out of 3 relays must agree to trip before the shutdown occurs. This provides redundancy and prevents nuisance trips from a single relay failure
Q: Is there a cybersecurity vulnerability with this module?
A: Yes. Woodward issued Service Bulletin 01671 (9/2020) for ProTech GII units (including 8237-2600) that may have a lapse in overspeed protection if Active probes are used with Speed Fail Trip set to “NOT USED.” Update your configuration immediately if this applies to your system
Q: Why is this cheaper than buying new from the OEM?
A: This is discontinued hardware available as new surplus inventory, not current OEM production. The lower price reflects limited availability and the fact that an upgrade version (-2601) exists, not a different operating principle.
Q: What should I check before ordering?
A: Confirm the exact part number (8237-2600), verify your speed probe type (Active vs Passive MPU), check your current configuration (Speed Fail Trip setting), and confirm the module condition (new surplus vs rebuilt). Also verify the upgrade path availability and whether you should consider the -2601 instead. If using Active probes, ensure you will update the configuration to set Speed Fail Trip to “USED” per Woodward Service Bulletin 01671.
