Power Conditioners

Power Distribution Units (PDUs), also sometimes referred to as Power Vaults or Power Distribution Assemblies, are transformers housed in NEMA rated enclosures that are used as main AC power for system power distribution. These units often include primary and secondary circuit protection as well as other electronic features. They can be stand-alone products located away from the customer’s product or can be incorporated in an existing product housing in rackmount or custom sized enclosures. Features of PDUs designed by QT&E include:

  • Custom number of inputs/outputs
  • Custom input/output voltages
  • Power monitoring
  • Optional over current protection
  • NRTL to UL certifications and CE Mark

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All of our units are built-to-order, in either production-run or prototype quantities. Contact us to determine your specifications and get your requirements down. If you don't know everything, that is okay, we can help. Call us at US +1 408-263-8444, or email us by clicking the button below:

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ISO 9001:2015 icon These transformer are NRTL to UL 506 and 1561. Find out more about our certifications by clicking here: More on certifications

Build configurations and capabilities

Electrical Characteristics

Up to 500kVA


1-Phase, 3-Phase

Up to 600Vrms


Enclosures (NEMA 1, 3, 4, 4X)


Circuit breakers

EMO switches

Locking devices


Line filters


Ring-lug compatibility

Touch-safe barriers

Examples of Power Distribution Units


50kVA Power Distribution Unit

5x 1-Phase, 60Hz

Input = 5x 480Vrms

Output = 5x 223Vrms @ 223Arms

NEMA 1 enclosure

NRTL to ul 1561, CE Mark


432kVA Power Distribution Unit

3-Phase, 50/60Hz

Input = 380/400/415Vrms

Output = 480/277Vrms @ 450Arms

Xfmr impedance = < 2% @ 60Hz

NEMA1 enclosure, circuit protection