UPS Solutions
Much confusion exists about the different types of uninterruptible power supplies (UPS) and which ones are best designed to protect your network and critical servers. You need to know the right tool for the job before a failure takes place – not after!
Trust Compu-Call to guide you towards the right UPS solution to match your needs. Compu-Call is an authorized solution provider for Emerson Liebert UPS solutions.
Liebert offers all three types of uninterruptible power supply (UPS) system configurations:
- Stand-by UPS—Ideal for home or desktop computers. Passes utility power straight through to the protected load with a 2-6 ms break in power when transferring to battery back-up. About 55% effective in filtering all power anomalies.
- Line Interactive UPS—Better protection. Provides power conditioning with a 2-6 ms break in power when transferring to battery back-up. Effective in filtering about 85% of all power anomalies.
- On-Line (Double Conversion) UPS—Best protection. Delivers continuous, high-quality AC power to equipment with no break when transferring to battery. Protects equipment from virtually all power disturbances due to blackouts, brownouts, sags, surges or noise interference. Effective in filtering 99% of all power anomalies. This is the type of UPS you need for protecting your business servers and networking equipment.
Liebert offers UPS systems in the industry’s widest range of sizes including desktop, rack-mount and enterprise systems for full facility power.
A Power Solution for Every Level of Need
Liebert GXT3 On-Line UPS: 500-3000VA, 1-phase

Liebert GXT3 leads the industry in combining small size, high capacity and multiple features. Designed to be either rack-mounted or installed in a tower configuration, the UPS is available in 500, 700, 1000, 1500, 2000 and 3000 VA ratings, in both 120 V and 230 V models.
A true on-line UPS, Liebert GXT3 includes features such as power factor correction, internal batteries, frequency conversion, unlimited external battery connectability and internal bypass capability. And all this is housed in a smaller 2U size cabinet that cuts space requirements in half while providing up to 3 kVA of true on-line power – batteries included. The UPS can also be used with external batteries for extended run times. More info.
Liebert Nfinity® On-Line UPS: 4-20 kVA, 1-phase

The Liebert Nfinity power system is a scalable 4 to 16 kVA or 12 to 20 kVA UPS designed with N+x parallel redundancy to provide a fault-tolerant network of power protection.
The modular design of the Liebert Nfinity power system was devised to provide easy scalability to users as their power demands grow. Configurations can be cost-effectively upgraded without re-investing in a new system or installation.
The Liebert Nfinity is a true on-line, double-conversion UPS that provides 100% power conditioning, zero transfer time to battery, no change in output voltage and better transient suppression than line-interactive units.
Its unique frame design houses all of the modular system components, including 4 kVA power modules, battery modules and system control modules. By simply installing additional power or battery modules, you can expand your current system, extend backup runtime or add redundancy. More info.
Liebert APM – Row-Based, Transformerless, On-line UPS
The Liebert APM is the compact UPS system designed to operate with the maximum energy efficiency in the minimum footprint for the protection of the small & medium computer rooms.
It features FlexPowerTM technology, which incorporates distributed intelligence and scalable power in a common assembly.
It is suitable for small& medium businesses with the attitude to grow fast: thanks to it’s architecture it enable to start with a basic configuration of 30kW which can grow with the business up to 150kW.
Lowest Cost Of Ownership
Liebert APM is designed to minimize capital equipment expense, to protect your technologic investment and to optimize operational efficiency. More info.
Liebert NX – The full line of Liebert NX power systems covers a range of UPS capacities to meet the needs of small and medium data centers.
Small Data Centers with up to 10 Racks
Liebert NX 10-30 kVA UPS

For the server room or small data center consisting of 2-10 racks, this innovative and reliable Liebert solution might be the fit for your network protection needs. When information is highly critical, and downtime inexcusable, this solution has the reliability you demand. Racks, air, power, service and monitoring — installed and pre-engineered to work together and to never stop working.
- Increases growth flexibility by handling larger loads, plus the ability to parallel 20 and 30 kVA modules for increased capacity and redundancy.
- Achieves higher availability by reducing the number of UPS units required to power your room.
- Reduces total cost of ownership through the use of longer life batteries and simplified preventive maintenance. More info.
Small Data Centers with up to 10-30 Racks
Liebert NX 40-120 kVA UPS with SoftscaleTM

As your rack-mount systems grow more complex and critical, Liebert has the solution for you. Designed for a 10-30 rack data center, this example combines racks, UPS, precision cooling, service, monitoring, installation and the highly important power distribution equipment — pre-engineered to work together.
- Softscale™ technology provides flexibility to increase UPS capacity by 20 or 40 kVA without changes in your infrastructure.
- Parallel UPS modules for capacity and redundancy and eliminate the batteries as a single point of failure because each UPS has its own isolated battery.
- Softscale™ technology, paralleling capabilities and Eco-mode™, all contribute to lower initial, incremental and operating costs. More info.
Medium Data Centers with up to 200 racks
Liebert NX 160-200 kVA UPS with SoftscaleTM

The flexible design of Liebert NX 160-200kVA UPS is perfect for mid-size and large data centers anticipating growth. Designed for data centers with up to 200 racks, this example combines racks, UPS, precision cooling, service, monitoring, installation and the highly important power distribution equipment — pre-engineered to work together. The UPS lineup may be installed inside or outside of the data center.
- Softscale™ technology provides flexibility to increase UPS capacity by 20 or 40 kVA without changes in your infrastructure.
- Parallel UPS modules for capacity and redundancy and eliminate the batteries as a single point of failure because each UPS has its own isolated battery.
- Softscale™ technology, paralleling capabilities and Eco-mode™, all contribute to lower initial, incremental and operating costs. More info.
Download an overview of Emerson Liebert's complete line of UPS power solutions.
Liebert Cooling Solutions
Protect your mission-critical equipment by maintaining the precise temperature for reliable equipment performance. Liebert makes a comprehensive range of data center cooling solutions. Compu-Call can help you determine the ideal cooling solution for your needs.
High Density Modular Data Center Cooling
Energy-efficient and flexible high heat density Liebert XD air conditioners and system cooling solutions available with open or closed architecture and pumped refrigerant-based or water-based technology. More info.
Small Room Cooling
Space-saving precision system cooling available in configurations and sizes to meet the needs of electronic equipment in tight spaces. More info.
Large Room Cooling
Precision data center cooling and humidity control solutions provide protection in raised floor or ducted applications. A variety of models and configurations are available. More info.
Telecom Enclosures

Precision cooling system designed for year-round cooling of remote communications shelters.
More info.
Download an overview of Emerson Liebert's complete line of cooling solutions.
Compu-Call has some of the most experienced power and cooling solutions consultants in the industry. We are local, established, trusted and experienced, serving over 1,500 clients across Massachusetts, Connecticut and Rhode Island (MA, CT, RI).