Woodward 5501-381 MicroNet TMR 220VAC Power Supply

Configured for primary energy distribution in MicroNet Triple Modular Redundant (TMR) control platforms, the Woodward 5501-381 (5501-381 Rev G Power Supply) provides direct physical/electrical execution.

Hardware Specifications

Industrial Drive & Governor Feedback Logic

The Woodward 5501-381 integrates heavy-duty holdup capacitor arrays to sustain a 16.7-20 ms power-fail ride-through envelope, keeping TMR processor voltages stable during brief utility grid dropouts. The internal switching architecture utilizes automated harmonic distortion suppression parameters to eliminate line-borne noise before it can introduce jitter into adjacent turbine speed tracking or actuator loop feedback response paths. When paired in a parallel redundancy chassis layout, the module executes active load-sharing functions, balancing output currents evenly while keeping thermal profiles low across the internal components.

Frequently Asked Questions

Q: How does the Hot-Swap feature function during a live module extraction inside a running TMR chassis?

A: The 5501-381 is fully isolated for live extraction and insertion when operating in a parallel redundant setup. Internal blocking diodes prevent current backfeeding, allowing a technician to swap out a faulted power card without disrupting the 24 VDC logic backplane or dropping active governor control loops.

Q: What protective actions execute automatically when internal temperatures cross the design threshold?

A: If the module climbs past its internal thermal operating limits, the onboard diagnostics trip the Overtemp LED and flag a system fault bit across the communication bus. If temperatures continue to rise, the over-temperature circuit cuts output current to protect the internal conversion stages from thermal runaway.

Q: How do the integrated 10 A time-delay fuse and circuit breaker handle input current surges?

A: The internal breaker manages short-duration circuit overloads and allows for manual resets, while the 10 A time-delay fuse operates as a secondary backup. This dual-layer layout allows normal, transient inrush currents to pass during startup but clears the AC input line immediately if a sustained short circuit occurs.

Field Installation Guidelines

• Chassis Slot Seating: Guide the power supply module straight along the designated tracks of the MicroNet TMR power chassis. Firmly press the module inward to completely lock the heavy-duty rear connectors into the backplane, then hand-tighten the integrated retaining hardware.
• AC Supply Circuit Isolation: Route the primary 220 VAC power feed through a separate physical conduit path. Keep these high-voltage AC lines isolated from low-voltage MPU speed sensor tracks or actuator control cables to prevent electromagnetic noise coupling.
• Chassis Ground Verification: Confirm that the power supply chassis ground path connects directly to the master plant instrumentation earth network through the rack frame. Do not share this ground path with high-power industrial induction motor neutrals.
• Convection Cooling Clearances: Ensure the top and bottom cooling vents on the chassis enclosure remain free of obstructions. Because the module can draw up to 1250 VA, maintaining clear airflow is vital to prevent heat buildup from triggering thermal safety shutdowns.