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Vertiv™ Liebert® STS2 Static Transfer Switch

For maximum availability applications, Liebert® STS2 static transfer switch provides an automatic, seamless transfer between your critical load and the outputs of two independent UPS systems in a dual-bus power configuration. If the primary UPS should fail, the switch will automatically transfer the loads to the alternate UPS.

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Best Suited For:
  • Data Center/Colocation/Hosting
  • Banking
  • Financial and Insurance
  • Government
  • Healthcare
  • Retail and Wholesale
  • Education
Warranty: One Year Limited Warranty Against Defects in Material and Workmanship

The Liebert® STS2 from Vertiv is making it easier to protect your critical equipment by giving your single cord loads the reliability of dual cord power or by providing added redundancy to your dual cord devices. With a single, space-saving unit, the Liebert STS2 static transfer switch provides automatic switching between two different AC power sources. The Liebert STS2 is available in 100A, 250A, 400A, 600A, 800A, 1000A, 1200A, 1250A, 1400A, 1600A, 1800A and 1850A systems, in both 60Hz and 50Hz. Multiple input voltages are available. Designed for use in dual-bus power applications, this solution combines fast switching between AC power sources, power isolation, monitoring and grounding into a single package.

Model Specifications Overview
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Liebert® STS2 ST 100A
100 amps   208, 220, 240, 280, 400, 415, 480, 575, 600 VAC   77 in   30 in   32 in   780 lbs  
Liebert® STS2 ST 250A
250 amps   208, 220, 240, 280, 400, 415, 480, 575, 600 VAC   77 in   30 in   32 in   780 lbs  
Liebert® STS2 ST400A
400 amps   208, 220, 240, 280, 400, 415, 480, 575, 600 VAC   77 in   38 in   32 in   1200 lbs  
Liebert® STS2 ST 600A
600 amps   208, 220, 240, 280, 400, 415, 480, 575, 600 VAC   77 in   38 in   32 in   1200 lbs  
Liebert® STS2 ST 800A
800 amps   208, 220, 240, 280, 400, 415, 480, 575, 600 VAC   77 in   84 in   32 in   2500 lbs  
Liebert® STS2 ST 1000A
1000 amps   208, 220, 240, 280, 400, 415, 480, 575, 600 VAC   77 in   84 in   32 in   2500 lbs  
Liebert® STS2 SR 400A
400 Amps   208, 480 VAC   69.4 in   31.7 in   32 in   1200 lb  
Liebert® STS2 SR 600A
600 Amps   208, 480 VAC   69.4 in   31.7 in   32 in   1200 lb  
Liebert® STS2 SX 1200-1850A
1200, 1250, 1400, 1600, 1800, 1850 amps   380, 400, 415, 480, 575, 600 VAC   88 in   25.7 in   35.6 in   1430 lbs  

Benefits

Operates efficiently
Front access to all components provides simplifies installation and maintenance, and reduces amount of floorspace required for access.
Internal CANBUS protocol: high-bandwidth communication between system components via twisted-pair cables.
Triple redundant logic with dual power feeds.
Standard on-unit monitoring and optional centralized monitoring capability provide continuous system visibility.
When applied as primary side switching, cost are lower due to requiring only one power distribution unit, a lower current due to 480V vs. 208V, and lower installation and wiring cost.

Features

Automatic switching for dual bus loads
Requires only frontaccessfor easy installation and maintenance
Offers primary or secondary side switching
100% rated, fuseless design

*To see model-specific downloads, you will need to go to the model-specific product page by selecting the model name in the specifications chart above.

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Products Support Contacts

Showing contacts for Ohio, 43215, USA Change
Vertiv™ Switchgear and Switchboard, USA
+1 864 375 1757
400 Supreme Industrial Drive Anderson South Carolina 29621 USA
Product areas of focus: Switchgear and Switchboard, Busway and Busduct

Frequently Asked Questions

Q
Do I need a static switch in my power distribution system?
A
There are many ways to design a power backup and distribution system. Please reference our white paper on Emerging Power Architectures in the Reports section on this web page or consult your local sales office for suggestions on how best to leverage and compare your existing equipment, power system goals and our capabilities.
Q
Can the product be customized?
A
There are many custom solutions available for our products. Please contact your local sales office for more information.
PRODUCTS & SERVICES
Overview
Critical Power
Overview Uninterruptible Power Supplies (UPS) DC Power Systems Power Distribution Static Transfer Switches Switchgear and Switchboard Busway and Busduct Battery Energy Storage System (BESS)
Thermal Management
Overview Liquid Cooling Solutions Heat Rejection Outdoor Packaged Systems Room Cooling In-Row Cooling Rack Cooling Free Cooling Chillers Evaporative Free Cooling Thermal Control and Monitoring Custom Thermal
Racks & Enclosures
Overview Integrated Solutions Racks & Containment Outdoor Enclosures
Monitoring & Management
Overview Digital Infrastructure Solutions Embedded Device Management Serial Console IP KVM Switches High Performance KVM LCD Tray Desktop KVM and KM Secure KVM Software Monitoring
Services
Overview Project Services UPS & Battery Services Digital Services Liquid Cooling Services Thermal Services Rack PDU Services DC Power Services Electrical Reliability Services Electrical Safety & Compliance Service Training
Tools & Product Registration
UPS Selector Use the rPDU Finder Calculate Cooling Retrofit Savings Calculate Cooling Economization Compare Rack Products Compare IT Management Products Download the Vertiv™ XR App Download the Vertiv™ Virtual Showroom App Vertiv Trade-In Program How to Buy Product Registration Virtually Test Cooling Systems in our Labs’ Digital Twins
SOLUTIONS
Overview
AI and High Performance Computing
Overview AI-ready Data Centers High Density Cooling Vertiv™ 360AI
Applications
Small/Medium Business Enterprise Broadcast & Entertainment Education Federal Healthcare Manufacturing Retail Telecom
Offerings
Overview Chilled Water Solutions Dynamic Power Vertiv Integrated Solutions Prefabricated Modular Solutions Network Closet Micro Data Center/Room Edge Data Center Core Data Center & Critical Facilities Colocation & Cloud Cable Landing Stations
Learn About
Overview Liquid Cooling Options for Data Centers Battery Energy Storage System Transitioning to 5G Lithium-ion Technologies UPS Types What is a Rack PDU The Edge Revolution Vertiv Data Center Security Solutions Customer Case Studies Edge eBook Series Hydrogen Fuel Cells
Vertiv Guides
AI Hub Guide to Data Center Sustainability Guide to 5G Technology Guide to Edge Computing Guide to Mission-Critical Facility Services
SUPPORT
Overview
Resources & Documentation
Product Documentation Quality Policy & Certifications Software/Firmware Updates Warranty Information Information and Product Security Report a Security Concern Register Your Product Tools & Applications Discontinued Products Frequently Asked Questions Open Source Software Information
Training
Overview Uninterruptible Power Supplies (UPS) Thermal / Cooling DC Power Systems Software Power Distribution IT Management Batteries Monitoring Industrial AC & DC Systems Vertiv Continuing Education (CE) Program
Support for Vertiv Brands
Avocent Maintenance Program Overview Avocent Support Contacts Busway and Busduct BIM Library
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