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General System Information
7
1.2.2 Features and Benefits
The Liebert FS provides clean constant DC output to the DC bus, at the user-selected, regulated volt-
age, until the stored energy is depleted. See Figure 5 for a graphic representation of the performance
power and duration curves of single and paralleled unit combinations.
Key Technological Features
• Active magnetic bearings
• Internal, integrated vacuum system
• Synchronous reluctance motor-generator
• Fiber composite flywheel
• Unique patented safety system
Key Customer Benefits
• High reliability
• Significantly increased power supply reliability
• Low total cost of ownership
• Operational flexibility
• Environmentally friendly
• Easy to install and easy to operate.
• Low standby losses
• Small footprint
• Lightweight
• Reliable, cost effective power systems for UPS ride-through needs
1.2.3 Applicable Standards and Certification
For distribution in North America, the Liebert FS is listed to the following Underwriter’s Laboratory
(UL) applicable requirements:
• UL 508, Standard for Safety for Electrical Industrial Control Equipment;
• UL 1004, Standard for Safety for Electric Motors;
• UL 1248, Standard for Safety for Engine-Generator Assemblies;
The Liebert FS is designed in accordance with the applicable sections of the requirements published by:
• National Fire Protection Association (NFPA)/National Electric Code (NEC)
• National Electrical Manufacturer's Association (NEMA)
• Occupational Safety & Health Administration (OSHA)
The Liebert FS is also listed to the following Canadian Standards as determined by UL (cUL):
• CSA-C22.2 No. 100-04, “Motors and Generators,”
• CSA-C22.2 No. 14-95, “Industrial Control Equipment,”
The "Uniform Building Code (UBC) Zone 4" certification requirements.