Description
The following parameters outline the core technical specifications and physical characteristics of the high-performance Woodward MicroNet triple modular redundant (TMR) high-voltage AC power supply unit.
- 1. Brand: Woodward
- 2. Model: 5501-381
- 3. Series: MicroNet Digital Control / MicroNet TMR Platform
- 4. Product Name: TMR Power Supply Unit (High Voltage AC)
- 5. Place of Origin: USA
- 6. Physical Status: Factory New / Industrial Spare Part
- 7. Dimensions: Standard MicroNet TMR rack-mount module format
- 8. Weight: 22 kg (48 lbs) when installed in chassis
- 9. Original Region: United States Manufacturing Hub
- 10. Power Rating: Operates at 220 V AC input voltage (range 47 to 63 Hz), with a maximum input power of 1250 VA and maximum input current of 6.7 A
Initial Operation Checklist
- 🔹 Inspect the exterior packaging and module housing for any transit-induced damage or physical defects prior to unboxing.
- 🔹 Verify that part number
5501-381matches system architecture specifications and cabinet engineering layout requirements exactly. - 🔹 Ensure that all high-voltage AC power sources feeding the supply are completely disconnected and locked out/tagged out before handling hardware.
- 🔹 Check input terminal connections and the integrated 10 A time-delay breaker/fuse for proper mechanical seating.
- 🔹 Confirm proper grounding continuity between the MicroNet TMR chassis framework and the main control cabinet ground bus.
Daily Maintenance & Servicing
- 🔸 Monitor operating ambient temperatures continuously, ensuring environment conditions remain within standard thresholds to prevent thermal trips.
- 🔸 Inspect front-panel LED indicators regularly (Input Fault, Power Supply Fault, Overtemperature, and green OK LED) to verify normal operational health.
- 🔸 Keep cabinet ventilation fans and airflow channels unblocked to maintain required cooling across the power supply housing.
- 🔸 Perform periodic visual checks on wiring terminals to ensure tight mechanical connections under plant vibration.
Troubleshooting & Common Issues
- 🔻 Symptom: Unit fails to power on or the green OK LED remains unlit.
Action: Check input voltage levels using a calibrated multimeter across input terminals to verify a stable 220 V AC supply, and inspect the 10 A time-delay input fuse.
- 🔻 Symptom: Overtemperature fault indicator illuminates during high-load operation.
Action: Check for restricted airflow, clean dust accumulation from cooling fins, and verify that cabinet climate control systems are working properly.
- 🔻 Symptom: Input fault status triggered.
Action: Inspect upstream AC supply lines for voltage sags, phase loss, or frequency deviations outside the 47 to 63 Hz operating range.
Safety Precautions
- ⚠️ Only certified electrical technicians qualified to work with high-voltage AC systems (220 V AC) should perform installation, wiring, or maintenance tasks.
- ⚠️ Observe strict electrical safety and lockout/tagout (LOTO) protocols before servicing live power distribution components.
- ⚠️ While the unit supports hot-swappable replacement during system operation, care must be taken to follow proper procedural guidelines to avoid electrical hazards or system disruption.
Frequently Asked Questions (Q&A)
- Q1: What is the primary function of the Woodward 5501-381 unit?
A1: It serves as a high-voltage AC triple modular redundant (TMR) power supply designed to provide stable, reliable power delivery within the MicroNet digital control platform.
- Q2: Is the unit hot-swappable during system operation?
A2: Yes, the power supply is designed for hot replacement, meaning the control chassis does not need to be shut down entirely during module extraction and replacement.
- Q3: What do the LED indicators on the front faceplate signify?
A3: The faceplate features indicators for Input Fault, Power Supply Fault, Overtemperature, and a green OK LED which illuminates to show the power supply is running normally without errors.
