Power Distribution Unit (PDU)

Power Distribution for LED Displays

LED video walls require substantial electrical power, carefully distributed to individual panels while managing inrush current, providing circuit protection, and enabling monitoring of the entire system.

PDU Types and Configurations

Rack-Mount PDUs: Install in equipment racks near LED walls. Accept high-amperage three-phase or single-phase power and distribute to multiple 15-20 amp circuits via standard outlets or specialized LED connectors.

Portable Distribution Boxes: Self-contained units designed for touring and rental. Include cam-lock inputs for generator or venue power, internal breakers, and multiple output connectors.

Panel-Integrated Distribution: Some LED panel systems include power distribution within the panel frames, daisy-chaining power from panel to panel. This reduces external distribution needs but limits flexibility.

Key PDU Features

Sequential Power-Up: Programmable delays between circuits prevent simultaneous inrush current. Typical sequences power one circuit per second until all panels are running.

Circuit Protection: Individual circuit breakers protect each output and allow selective disconnection for maintenance without affecting the entire wall.

Power Monitoring: Digital displays show current draw per circuit, helping identify overloaded circuits or failing panels that draw excessive current.

Emergency Stop: Single-switch capability to cut all power instantly if needed during production.

Calculating Power Requirements

1. Determine panel maximum power consumption from specifications 2. Multiply by total panel count 3. Add power for processors, cooling, and accessory equipment 4. Apply 1.25 safety factor per electrical code requirements 5. Divide by supply voltage to determine amperage

Three-Phase vs. Single-Phase

Large LED installations benefit from three-phase power distribution, which provides 73% more power capacity than equivalent single-phase while balancing load across all phases. Most venue power services offer three-phase for high-demand equipment.

Touring Considerations

Rental PDUs must be robust enough for repeated setup and teardown. Quality units use industrial-grade connectors, reinforced housings, and clearly labeled circuits. Documentation should show maximum loads per circuit to prevent overloading during setup.