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Liebert STS2 StaticTransfer 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
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  • Government
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  • Retail and Wholesale
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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 and 1,000A 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
Liebert STS2 ST 100A
100 amps   208, 220, 240, 380, 415, 480, 600 VAC   77 in   30 in   32 in   780 lbs  
Liebert STS2 ST 250A
250 amps   208, 220, 240, 380, 415, 480, 600 VAC   77 in   30 in   32 in   780 lbs  
Liebert STS2 ST400A
400 amps   208, 220, 240, 380, 415, 480, 600 VAC   77 in   38 in   32 in   1200 lbs  
Liebert STS2 ST 600A
600 amps   208, 220, 240, 380, 415, 480, 600 VAC   77 in   38 in   32 in   1200 lbs  
Liebert STS2 ST 800A
800 amps   208, 220, 240, 380, 415, 480, 600 VAC   77 in   84 in   32 in   2500 lbs  
Liebert STS2 ST 1000A
1000 amps   208, 220, 240, 380, 415, 480, 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  

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 front access for easy installation and maintenance
Offers primary or secondary side switching 
100% rated, fuseless design

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Products Support Contacts

Showing contacts for Virginia, 20149, USA Change
Chloride Industrial UPS Services
+1 800 442 7489
USA
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Emergency Response for Services
+1 800 543 2378
USA
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Geist Support - Americas (Rack PDU and Watchdog)
+1 888 630 4445
1777 Yolande Avenue Lincoln Nebraska USA
Product areas of focus: Power Distribution, Monitoring

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.
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