Model: 5501-381
Brand: Woodward
Series: MicroNet Digital Control / MicroNet TMR
Core Function: Triple Modular Redundant (TMR) Power Supply module for Woodward MicroNet TMR systems. Accepts 220 VAC input and provides regulated power to the control chassis. Supports high-availability turbine control applications with hot-swap capability and comprehensive fault indication.
HS Code: 8504.40 / 8537.10 (Static converters / Boards and panels for electric control)
Product Parameters
| Parameter | Specification |
|---|---|
| Product Type | TMR Power Supply Module |
| System | Woodward MicroNet TMR |
| Input Voltage | 220 VAC |
| Operating Frequency | 47 – 63 Hz |
| Maximum Input Power | 1250 VA |
| Maximum Input Current | 6.7 A |
| Holdup Time | 1 cycle @ 220 VAC |
| Input Protection | 10 A time-delay fuse / breaker |
| Chassis | MicroNet TMR Power Supply Chassis (e.g. 5453-277) |
| Hot-Swap Capability | Yes |
| LED Indicators | Input Fault, Power Supply Fault, Overtemperature, OK |
| Weight (in chassis) | Approx. 22 kg (48 lbs) |
| Reference Manuals | 26167V1, 26166V2 |
Advantages and Features
- True Triple Modular Redundancy (TMR) for maximum system availability
- Hot-swappable design allows replacement without shutting down the control system
- Clear front-panel LED diagnostics (Input Fault, PS Fault, Overtemperature, OK)
- High power capacity suitable for full MicroNet TMR chassis loads
- Designed specifically for critical turbomachinery control applications
- Robust industrial construction meeting Woodward reliability standards
- Supports dual power supply configurations (separate chassis connected by ribbon cable)
- Long hold-up time helps ride through short power interruptions
Application Cases in Application Fields
- Primary power supply for Woodward MicroNet TMR control systems
- Gas turbine and steam turbine control and protection systems
- High-reliability power generation plants
- Oil & gas, petrochemical, and industrial turbine applications
- Critical rotating machinery requiring TMR architecture
- Systems where continuous operation and hot-swap maintenance are essential
- Retrofit and spare parts support for existing MicroNet TMR installations
Comparisons with Competing Products
| Aspect | Woodward 5501-381 (220 VAC) | 5501-370 (24 VDC) | 5501-380 (120 VAC/VDC) | Generic Industrial PS |
|---|---|---|---|---|
| Input Voltage | 220 VAC | 24 VDC | 120 VAC/VDC | Varies |
| Redundancy | TMR | TMR | TMR | Usually single/dual |
| Hot-Swap | Yes | Yes | Yes | Rare |
| System Specific | MicroNet TMR optimized | Same | Same | Generic |
| Best For | 220 VAC site power | DC battery systems | 120 V sites | Non-critical use |
Selection Suggestions and Precautions
Selection Suggestions:
- Confirm site power is 220 VAC (47–63 Hz).
- Use only in the designated MicroNet TMR Power Supply Chassis.
- For dual redundant supplies, install each module in a separate chassis and interconnect with the proper ribbon cables.
- Verify compatibility with the overall MicroNet TMR system configuration and CPU modules.
- Check available manuals (26167 series) for detailed installation and wiring.
Precautions:
- Always follow Woodward safety and installation procedures when working with AC power modules.
- Ensure correct fusing (10 A time-delay) and proper grounding.
- Hot-swap is supported, but proper procedures must be followed to avoid disruption.
- Monitor the front-panel LEDs regularly for early fault detection.
- Use only genuine Woodward replacement modules and accessories.
- This is a critical power component — incorrect installation can affect entire system availability.
Recent Popular Same-Brand / Related Models
- 5501-370 — MicroNet TMR PS (24 VDC Input)
- 5501-380 — MicroNet TMR PS (120 VAC/VDC Input)
- 5466-1049 — MicroNet TMR Kernel Power Supply
- 5453-277 — MicroNet TMR Power Supply Chassis
- Related MicroNet TMR CPU and I/O modules
- Other MicroNet Plus power supplies (5466-1000 / 1001 / 1002 series)
