WOODWARD 5464-414 | 24V DC Power Supply, 5A, Industrial

Description

Product Introduction

That gas compression station in West Texas—the one with the Woodward controls on the Caterpillar 3616—had a “loss of DC” alarm last summer. The tech on shift swapped the 5464-414 with a spare from stores, and the alarm cleared. Later, we bench-tested the pulled supply. The output was 22V at no load—low enough to cause the control modules to act flaky. A bulging capacitor on the secondary side was the culprit. One 3 part, one 600 supply, one very expensive service call.

The WOODWARD 5464-414 is a 120W power supply designed for Woodward industrial controls. It takes 115 or 230V AC (selectable via a switch on the side) and outputs a regulated 24V DC at 5 amps. It’s a rugged industrial supply—convection cooled (no fan), conformal coated boards, and heavy-duty terminals. In a genset control panel, it powers the governor, the speed switch, and the solenoids. If it fails, the engine stops.

Key Technical Specifications

Quality Inspection Process (SOP Transparency)

A power supply gets a full load test. Here’s our process.

1. Incoming Verification
   • Match the model: 5464-414. (There are variants—this is the standard version.)
   • Visual inspection: Open the case and look for bulging capacitors, brown discoloration on the PCB.
   • Check the input voltage selector switch—make sure it’s not stuck or corroded.
   • Inspect the output terminals—no cracks, screws turn freely.
2. No-Load Test
   • Set the input switch to 230V (unless customer specifies 115V).
   • Apply power through a variac, bring up slowly—watch for sparks.
   • Measure output: 24.0V ±0.5V.
   • Green LED on.
3. Full-Load Test
   • Connect an electronic load at 5A.
   • 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.
4. Protection Test
   • Short the output briefly—the internal fuse should blow (or the supply should go into hiccup mode; we document which).
   • If fuse blows, we replace it (and note in the report).
   • Overvoltage test: force an internal fault (simulated), verify crowbar fires.
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 50 °C in a thermal chamber, running at 5A 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, compressor stations, and power plants. Here’s where people go wrong.

❗Input Voltage Switch
The little red switch on the side is easy to bump during installation. If it’s set to 115V and you feed it 230V, the supply will die instantly—input fuse blows, maybe more. Check it before you apply power. Every time.

Output Polarity
The terminals are marked + and -, but if you reverse them, the supply might have reverse polarity protection? Some do, some don’t. The 5464-414 doesn’t—you’ll blow the fuse. Wire it right the first time.

Grounding
There’s a chassis ground terminal. Use it. If you don’t, the output common can float relative to ground, causing noise in the control modules.

Load Sharing
If you need more than 5A, you might parallel two supplies. But they’re not designed for active load sharing—you’ll need external OR-ing diodes. Don’t just wire them in parallel; one will carry most of the load and overheat.

Aging Capacitors
These supplies are old. Even new-old-stock units may have capacitors that have degraded from sitting. We reform them during test (gradual power-up), but if you install one that’s been on a shelf for 20 years without reforming, it might fail early.

*Nail these five, and your 5464-414 will run for another decade.*

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 capacitors have zero hours (though they may need reforming), the transformer has never been energized, and the terminals have never seen a screwdriver.

Refurbished risk in plain terms
A refurbished Woodward power supply often comes from a decommissioned genset. 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 sells it. Six months later, in a hot engine room, 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 5A).
• Capacitor reforming note (if applicable).
• 12‑month warranty.

Pricing context
We’re priced 35% above the cheapest “pulled” Woodward supplies and 20% below Woodward’s current list price. That pays for the full-load test, the capacitor reforming, and the warranty.

Performance Benchmarks & Test Results

Test conditions: 230V AC input, 5A load, ambient 24 °C.

We keep the full load test log—ask, and we’ll email the Excel file.

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