3-Phase PDUs

Marway’s standard Optima three-phase PDUs are designed to meet the demands of industrial-like environments. This starts with an 18ga steel enclosure, surge suppression, main circuit breakers, and main power indicators on all models as standard. Most models include an EMI filter, remote EPO circuit, and compatibility with Marway’s Commander remote control panels.

All standard models are wired for 120/208 volt 3-phase. A variety of smart and basic models come in 2U, 3U, and 0U sizes with 20-amp and 30-amp capacities. All models have a variety of inlet and outlet connector options.

In addition to many standard three-phase PDUs to choose from, Marway specializes in re-configurations, modifications, and fully-custom solutions as well.

Meeting Power Management Challenges

  • Protecting equipment from noisy power signals using specially-selected, three-phase EMI filters and surge suppressors.
  • Saving space by consolidating conditioning and conversion capabilities often in external power boxes.
  • Meeting the exact connectivity and control needs of specialized equipment.

Standard and Custom

  • Almost 75 standard basic and smart 3-phase PDUs.
    • 120/208 3-phase wye, 20-amp and 30-amp models.
    • 2U, 3U, and vertical 0U configurations.
    • Basic, switched-only, metered and switched versions.
  • Marway specializes in application-specific PDUs.
    • Rackmount chassis from 0U to 24U, to rack sized.
    • Custom enclosures for non-rack applications.
    • Up to 480 Vac wye or delta, 400 amps.

Conversion, Conditioning, and Control

  • Meet EMI standards using filters and shielded enclosures.
  • Mitigate voltage spikes/transients using surge suppression.
  • Integration of ac and dc sources.
  • Conversions of three-phase input sources into single phase and dc branches.
  • Local and remote power monitoring.
  • Local and remote switching of outlets via relays, SSRs, or three-phase contactors.
  • Individually breakered branches.
  • EPO and interlock integration and remote panels.

Networked and Non-networked

  • Non-networked PDUs still offer some remote switching through discrete signals from remote panels.
  • Networked PDUs offer remote control and monitoring over Ethernet using HTTP/S, SSH, Telnet, and SNMP.
  • Remote switching of outlets.
  • Remote monitoring of inlet current, voltage, and power.
  • Remote monitoring of outlet current (Q1 2019).
  • Event alerts for startup, user login, outlet state change, EPO, current and voltage setpoint excursion, and configuration changes (via SNMP, email, SMS).
  • Scripted automation through Telnet, SSH, SNMP, or RESTful API over HTTP/S.

Compliance and Standards

  • Certified ISO 9001.
  • UL and CE certification (others when required)
  • Designed and manufactured to UL/IEC 62368-1 and 61010-1 (others when required)
  • Environment and reliability testing when required.

Standard 3-Phase PDU Highlights

With almost 75 standard 120/208 Vac models across multiple product series, defining the options thoroughly is best left to each model’s dedicated web page or the Standard Products Catalog. However, here are a few highlights to glance over.

Standard Features

Every unit has a main breaker, main power on indicators for each phase, and a surge suppressor (details are in the catalog).

EMI Filter

Why choose to have an EMI filter? An electro-magnetic interference filter is one of a few tools which can be used to clean up noisy power signals in industrial-like environments. Most office/IT facilities would likely not need one, but in facilities with machine shops, conveyors, or other large electrical equipment being switched on and off, disturbances get introduced into the power signals throughout the building. Having an EMI filter at the PDU helps protect downstream equipment.

  • For the 532 (2U), 533, 833 (3U) series, an EMI filter is standard.
  • For all 0U models (529/829, 539/839), there is no room for an EMI filter, so one is not available.

Remote Switching and EPO

The Optima remote switching/EPO feature is primarily designed for use with Marway’s Commander panels. A Commander panel may be connected to one or more PDUs, and thereby provide remote on/off and EPO functionality for several racks in unison. In all models, the utility outlets are not controlled by the EPO, but all other outlets are.

  • For the 532 (2U), 533, 833 (3U) series, the remote EPO system is standard.
  • For all 0U models (529/829, 539/839), there is no room for the EPO system, so one is not available.
Collage of three-phase PDUs from Marway's Optima product lines.
The 2U and 3U enclosures of Marway’s 532 (top left), 533 (center left), and 833 (bottom left) Series of three-phase PDUs give enough extra room to provide multiple independent circuits, and a variety of straight-blade and twist-lock outlet options. EMI filter, remote EPO control, and surge suppression are standard. The vertical 0U 839 (left) and 539 Series provide three-phase power in a rack-space saving form factor while allowing up to 42 outlets without networking, or 24 outlets with networking. While there’s no room for an EMI filter, surge suppression is still standard on 0U models.
Rack-sized 3-phase PDUs.
Marway’s custom 3-phase PDUs range all the way to rack-sized projects with multiple power forms, integral power conditioning, and multiple control circuits and monitoring capabilities.
A photo of an EMI filter integrated into a custom PDU.
EMI filters (aluminum box in the photo center) and surge suppressors are integrated into Marway’s standard 3-phase PDUs to mitigate noise problems in industrial-like environments.