Description

WOODWARD 5501-381 | High Integrity Power Module for Gas & Steam Turbine Control

Meta Description

WOODWARD 5501-381 is an AC power supply module designed exclusively for MicroNet TMR triple redundant control racks. It supplies stable DC power to CPU and I/O cards for turbine and compressor control systems. Every unit passes comprehensive bench testing before shipment. Original manufacturing discontinued, limited stock available.

Product Core Brief

Model: 5501-381
Brand: WOODWARD
Series: MicroNet TMR Digital Control System
Core Function: Convert AC input to regulated DC power for all rack-based control boards
Type: Rack Mount Power Supply Module
Key Specs: 220 VAC input, hot swappable, multi-channel fault LED indicators, built-in over-temperature protection

Condition: Bench-tested surplus stock, fully functional verified

⚠️ OEM production discontinued, available inventory limited

Product Introduction

Power supply failure is one of the most common root causes of unplanned turbine trips, and WOODWARD 5501-381 delivers stable power infrastructure for MicroNet TMR control racks. It feeds the backplane to support redundant CPU, communication and I/O modules on gas turbines, steam turbines and centrifugal compressors.

Unlike generic industrial power supplies, this unit matches the mechanical form factor, timing sequence and fault reporting protocol of MicroNet TMR racks. It supports controlled hot swap without forcing full chassis shutdown. The module maintains stable output within -20 °C ~ +60 °C cabinet temperature, suitable for power plants and offshore oil & gas compressor packages.

Key Technical Specifications

Parameter	Specification
Part Number	5501-381
Input Voltage	220 VAC
Max Input Current	6.7 A
Line Holdup Time	1 power cycle at rated input voltage
Supported Chassis	MicroNet TMR rack system
Hot Swap Support	Yes, follow official operation procedure
Status Indicators	OK, Input Fault, Internal Fault, Overtemperature LED
Protection Mechanisms	Over-temperature, over-current, short-circuit protection
Operating Temperature	-20 ℃ ~ +60 ℃; Storage: -40 ℃ ~ +85 ℃
Installation Format	Plug-in rack module
Weight	Approx. 0.7 kg

WOODWARD 5501-381

Quality Control Process

Inbound Traceability & Visual Inspection

Check serial number, hardware revision label and PCB surface. Inspect circuit corrosion, damaged connectors, burnt components or repair traces. Record hardware revision for compatibility verification.
Live Bench Functional Test

Install the 5501-381 inside standard MicroNet TMR test rack. Complete power-on startup test, steady-state load operation, fault indicator simulation and continuous 24-hour aging testing. All voltage output data is logged as test evidence.
Electrical Performance Testing

Measure output voltage stability under rated load; verify protection trigger function. Inspect insulation resistance and continuity. Confirm all LED indicators operate normally.
Revision & Compatibility Recording

Document hardware revision. We will cross-check compatibility with customer’s existing MicroNet rack firmware before delivery upon request.
Final QC & Anti-Static Packaging

QC engineer confirms all test items pass. Module is sealed inside anti-static bag, wrapped with shock-resistant bubble film and packed into rigid carton. A QC Passed label with test date is attached. Test photos or video records can be provided on demand.

Field Replacement Pitfall Guide

❗ Hardware Revision Matching Risk

Multiple revisions exist for 5501-381 (Rev D, Rev G etc.). Older rack firmware may fail to identify newer hardware revisions, triggering backplane communication errors after replacement.

Tip: Record revision code printed on your original power supply before ordering.

Case Reference: A steam turbine station replaced the power module without checking revision; the rack kept reporting unknown module alarms and required three days of firmware adjustment.

❗ Hot Swap Operating Rules

Hot swap is supported, but avoid replacement during unit loaded operation. Sudden power fluctuation may trigger control logic alarms. Best practice: execute replacement during equipment shutdown.

❗ AC Input Circuit Check

Confirm input circuit breaker rating matches OEM specification (10 A time-delay breaker). Improper fuse or breaker selection can lead to unexpected power cut during load fluctuation.

❗ ESD Protection Requirements

Internal power conversion circuits are sensitive to static electricity. Wear anti-static wristband and operate on anti-static mat. Dry environments increase hidden static damage risk.

❗ Ventilation Clearance

Ensure cabinet cooling airflow is sufficient. Poor ventilation activates over-temperature protection and causes intermittent power supply dropout. Do not block the module ventilation slots.

Quick Conclusion

WOODWARD 5501-381 only works with MicroNet TMR racks; it cannot be used as a standalone power supply or matched with other brand control systems.
Primary function: supply regulated DC power to all backplane modules for turbine and compressor control systems.
Confirm hardware revision and rack firmware compatibility before procurement.
OEM manufacturing has stopped, stock volume is limited; lead time depends on available inventory.
Every spare module is fully bench tested prior to delivery, test documentation available upon request.

FAQ

Q1: Can 5501-381 be used for non-TMR single MicroNet racks?

A1: It is designed for TMR triple redundant racks. Single rack models adopt different power supply variants, direct replacement is not recommended.

Q2: What alarm signals will appear when the power supply fails?

A2: Corresponding fault LED lights up on the front panel, and the main CPU will log power supply fault events in the system diagnostic list.

Q3: Can I replace the power module while the turbine remains online?

A3: Hardware supports hot swap, but site risk assessment is required. Most operators perform replacement during planned shutdown to avoid accidental trips.

Q4: What warranty coverage applies?

A4: 12-month warranty after delivery, covering functional failures under standard operating conditions. Damage caused by wrong wiring, static discharge, over-temperature or improper hot swap is excluded.

Recommended Publishing Channel Adjustment

Official Website Product Page: Keep full content, retain specification table and QC workflow, highlight hardware revision verification reminder.
B2B Industrial Platforms: Condense introduction, move technical specs forward, mark “In Stock, Fully Bench Tested, 1-Year Warranty”.
Industry Technical Forum: Extract the Field Replacement Pitfall Guide as independent technical article to attract turbine and compressor maintenance engineers.

If you need, I can reorganise all content into pure English copy ready for overseas industrial independent website release.