WOODWARD 5466-316 | 24V DC Power Supply for Controls

Description

Product Introduction

That cogeneration plant in California—the one with the Woodward-controlled Solar turbine—had a “loss of DC” trip last summer. The tech on shift found the 5466-316 power supply dead, no LEDs, no output. Swapped it with a spare from stores, fired right up. But when he put the failed unit on the bench, the only thing wrong was a bulging input capacitor. One $2 part, twenty years of heat, finally gave up. The rest of the supply was fine.

The WOODWARD 5466-316 is a 240W power supply in a rugged metal enclosure, designed to live in industrial panels next to engines, turbines, and generators. It takes 115 or 230V AC (auto-ranging, no switch to forget) and gives you a stiff 24V DC at up to 10 amps. Inside, it’s a standard switchmode topology: input rectifier, bulk caps, flyback converter, output filtering. Nothing fancy, but built to Woodward’s specs: wide temp range, high vibration tolerance, and protection against surges on the input line. The 5466-316 is the “-316” variant, which means it has the standard terminal block connections and no extra frills. It’s the workhorse power supply for a generation of Woodward controls—if your cabinet has a Woodward governor or load-sharing module, chances are it’s fed by one of these.

Key Technical Specifications

Quality Inspection Process (SOP Transparency)

A power supply gets a full workout here. Here’s our process.

1. Incoming Verification
   • Match the model: 5466-316. (There’s a 5466-314 with lower current—different part.)
   • Visual inspection: Check enclosure for dents, scratches. Look at the terminal block—no cracks.
   • Inspect the PCB through the vents: no bulging caps, no burnt smell.
2. No-Load Test
   • Apply 115V AC through a variac, bring up slowly—watch for sparks.
   • Measure output: 24.0V ±0.5V.
   • Green LED on, red LED off.
   • Switch to 230V AC (auto-ranging, so no change needed)—same result.
3. Full-Load Test
   • Connect an electronic load at 10A.
   • Run for 1 hour, logging output voltage every 5 minutes.
   • Voltage must stay above 23.5V, ripple <50 mV.
   • Measure case temperature—should stabilize below 65 °C (convection cooled).
4. Protection Test
   • Short the output—overcurrent should trip (hiccup mode) within 10 ms.
   • Remove short—supply should auto-recover within 1 second.
   • Overvoltage test: force an internal fault (simulated), verify crowbar fires and output drops to near zero.
5. Isolation Test
   • 500V megger between AC input (shorted) and DC output (shorted)—>10 MΩ.
   • 500V megger between DC output and chassis ground—>10 MΩ.
6. Thermal Soak
   • 4 hours at 60 °C in a thermal chamber, running at 10A load.
   • Monitor output voltage and ripple—must stay within spec.
7. Final QC & Packaging
   • QC sticker with test date and operator initials.
   • Wrap in anti-static bag.
   • Double-box with foam padding.
   • Test report included—load test log, ripple measurements.

Field Replacement Pitfalls

I’ve swapped these in engine rooms, turbine halls, and offshore platforms. Here’s where people go wrong.

❗Input Voltage Surprises
The 5466-316 is auto-ranging, but it needs a clean sine wave. If you feed it from a generator with bad waveform (lots of harmonic distortion), it might overheat or shut down. We’ve seen it in remote sites with cheap gen-sets.

Output Polarity
The terminals are marked + and -, but if you reverse them accidentally, the supply has reverse polarity protection? No—most of these don’t. You’ll blow the internal fuse instantly. Check twice, wire once.

Grounding
There’s a chassis ground terminal. Use it. If you leave it floating, the output common can drift relative to ground, causing noise in connected controls. In one site, ungrounded supplies caused random analog input shifts for months.

Load Sharing
If you need more than 10A, you might parallel two supplies. But they’re not designed for active load sharing—you’ll need external OR-ing diodes and possibly a current balance circuit. Don’t just wire them in parallel; one will carry most of the load and overheat.

Convection Cooling
These have no fan. If you mount it in a sealed box with no airflow, the internal temperature will rise, and the supply will derate or fail. Leave at least 50 mm clearance above and below.

*Nail these five, and your 5466-316 will outlast the engine it powers.*

New Original vs. Refurbished: Why It Matters

“New Original (New Surplus)” means this supply was manufactured by Woodward, packed in its original box, and never installed. The electrolytic capacitors have zero hours, the fan (none here) hasn’t run, and the terminals have never seen a screwdriver.

Refurbished risk in plain terms
A refurbished Woodward power supply often comes from a decommissioned generator set. It may have run for years at high temperature. The capacitors are aged—ESR rises, ripple increases. A refurbisher tests it at low load and calls it good. Six months later, in a hot cabinet, it fails.

Real cost of a refurbished failure
If this supply powers a critical engine control, a failure means the engine shuts down. If that engine is driving a pump on a pipeline, that’s lost throughput. The cost of one day of lost production dwarfs the price difference.

What we provide as proof

• Woodward box (or photos).
• Serial number recorded.
• Load test log (1 hour at 10A).
• Thermal images (on request).
• 12‑month warranty.

Pricing context
We’re priced 40% above the cheapest “pulled” 5466-316s and 25% below Woodward’s current list price. That pays for the full-load test, the thermal soak, and the warranty that covers replacement if a capacitor fails.

Performance Benchmarks & Test Results

Test conditions: 230V AC input, 10A load, ambient 24 °C.

We keep the full load test log and thermal images—ask, and we’ll email them.

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