Power Distribution Units (PDUs) essentially serve as a “circuit breakers” that protect expensive and sensitive loads such as computers, displays, control devices, sensors, and weapons systems against current inrush, spikes, and short circuit conditions. As such, in some cases, PDUs are also referred to as circuit breakers, remote power control (RPC,) and other trade names. PDUs are available in many different form factors depending on requirements, but not all PDUs are designed for use in military or aerospace environments.
Nova Electric offers a full line of COTS and Military PDUs designed to manage power capacity and functionality for harsh environment applications. The same robust construction that characterizes our MIL-STD-810, MIL-S-901, and MIL-STD-167 AC Power Sources applies to our PDUs, which are also available with enhanced filtering to meet MIL-STD-461 and Tempest-Grade requirements.
Our PDU offerings feature a nearly unlimited selection of choices from chassis configurations (rack mount, freestanding, or bulkhead mount,) connector styles, switches, breakers, indicators, and more. We can use an existing baseline product, a modified version of an existing product, or a custom product designed and manufactured to your exact specifications.
SPECIAL OUTPUTS – Some applications have a single input available, but require multiple output voltages. Nova Electric offers such PDUs, most commonly with 120 VAC, single phase input and multiple 120 VAC single phase outputs plus multiple DC outputs (such as 28 VDC, 12 VDC, and 6 VDC) using internal power supplies.
- Single-phase, two-phase, and three-phase
- 50 Hz, 60Hz and 400Hz – specialty frequencies for rail applications also available
- Up to 100 Amp loads and higher
- AC-in/AC-out, AC-in/DC-out, DC-in/AC-out, and DC-in/DC-out
- Input and/or output circuit breakers
- Signal conditioning with EMI/RFI filters
- Surge protection
- Various status indicators
- On/Off/EPO control
- Remote control and daisy-chain capability with optional SNMP control
- NEMA, IEC, and MIL-SPEC connectors
- Various chassis designs, finishes, handles
- Weatherproof / High-IP Protection construction
There are different categories of PDUs. Understanding the differences will help you select which options may apply to your application.
A basic PDU combines a single power input, a circuit breaker (or fuse), and multiple power outlets in a single enclosure. While similar in function to an office power strip, Nova Electric’s PDUs are made of high quality materials and components intended for long service and demanding military environments. They’re most often ( but not always) built as 19″ rack-mount enclosures to power several electronic devices as part of a total system. Basic units will typically have NEMA, IEC, or MS type connectors, but can also feature a variety of specialized connectors for military and other harsh environments. Any number of signal, connector, indicator, and circuit options can enhance a basic unit’s design.
These PDUs add the ability to switch individual or groups of outlets on and off to allow some power management. Switching may be accomplished through controls on the PDU or remotely through dry contacts or network communications. There may also be capability to delay the application of power after a switch is turned on. This allows controlled startup of equipment which may have high surge loads upon power up close to the limit of downstream circuit breakers.
Auto-Transfer Switching PDU
These PDUs are designed to allow a primary and secondary power source to power the entire set of outlets. If the primary source power fails or goes out of tolerance, the secondary source is applied. This is accomplished using high-speed voltage sensing components so that power loss to the outlets is short enough that most equipment will not detect the power drop and remain fully operational during the power transfer. This is typically used for high-availability applications with redundant power systems.
A metered PDU incorporates the ability to display real-time current draw in Amps by incorporating either digital or analog indicators. This eliminates the guesswork of estimating whether the PDU has the capacity to connect more devices
For more information or a price quote for a Nova Electric rugged PDU or any of our other quality Nova Power Solutions, please contact Nova Electric. All specifications subject to change without notice.