Resources
Guides, Specs & Answers
Downloads and frequently asked questions, Millennium is your resource for power distribution systems
Downloads
Product Spec Sheets
Download information here for detailed specifications for each product line.
- UL 1558 Low Voltage Switchgear (PDF) →
- UL 891 Low Voltage Switchboards (PDF) →
- Power Distribution Units (PDUs) (PDF) →
- Remote Power Panels (RPPs) (PDF) →
- UL 67 Panel Boards (PDF) →
- MV Switchgear (PDF) →
Product Catalog
The full line of power products from Millennium Power Systems in one document. Download (PDF) →
German Product Sheet
Datasheet for the German-market product. Download (PDF) →
Frequently Asked Questions
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What Is Low-Voltage Switchgear?
Low-voltage switchgear is a metal-enclosed assembly that distributes, protects, and controls electrical power below 1,000 volts. It sits between a facility’s service entrance and its downstream panels, providing fault interruption, isolation, and metering for the entire building load.
What’s the Difference Between Switchgear and a Switchboard?
Switchgear uses draw-out, individually compartmentalized power circuit breakers rated for service-entrance-grade short-circuit duty (UL 1558). Switchboards use fixed-mount breakers, are typically lighter-duty (UL 891), and cost less — appropriate for smaller commercial loads but not for critical or large industrial service.
What Is an E-House (Electrical House)?
An E-house is a factory-built, fully wired modular building containing switchgear, controls, protective relays, and auxiliary systems. It ships to site as a single tested unit, compressing field installation time from months to weeks and reducing on-site labor and weather risk.
Do You Build Custom-Engineered Systems?
Yes. Every Millennium lineup is engineered to your single-line diagram, short-circuit study, and site conditions — voltage class, breaker frames, protective relay scheme, controls, and enclosure are specified per project rather than pulled from a catalog.
Do Your Systems Support Mission-Critical Data Center Power Demands?
Yes. We build switchgear, paralleling controls, and modular power distribution for Tier III and Tier IV data centers, including 2N and 2(N+1) topologies, generator paralleling, automatic transfer schemes, and UPS-fed distribution down to the rack.
What Markets Do You Serve?
Data centers, industrial and manufacturing, utilities and energy, healthcare, and commercial and infrastructure projects. Our application engineers transfer experience between markets.
What Standards Do Your Power Systems Meet?
Our equipment is built to UL 1558 (low-voltage metal-enclosed switchgear), UL 891 (switchboards), ANSI C37 (medium-voltage), IEEE 1584 (arc-flash), and the National Electrical Code. We can support full short-circuit, coordination, and arc-flash studies as part of the engineering package.
Do You Provide Installation, Commissioning, and Start-Up?
Yes. Our field service team handles installation supervision, commissioning, protective-relay setting, and start-up. Offices in Beachwood, OH and Newnan, GA support our sales and service techs throughout the country who support customers that need service. Whether your power system was provided by us or someone else, Millennium can provide service.
Where Are Your Products Made?
Our power systems are manufactured in the United States, with global support through the Grenzebach Group.
How Long Has Millennium Been in Business?
Founded as Millennium Control Systems, we have consulted, engineered, manufactured, and serviced customers in the United States for nearly 30 years.