If you’ve spent any time looking for a backup power UPS, then you already know that when it comes to an uninterruptible power supply, you have an unlimited number of options. Narrowing them down and choosing the right UPS power supply for your application depends on a number of different factors including UPS system typology, UPS load capacity, and UPS runtime, to name just a few.
Simplifique la elección de su sistema UPS con una poderosa herramienta de selección de EverExceed; EverExceed ofrece un selector de productos atractivo donde puede filtrar los sistemas UPS por estas y muchas otras características, y luego comparar las opciones que cumplen con sus criterios una al lado de la otra. Es una herramienta altamente efectiva y que ahorra tiempo para elegir la fuente de alimentación de respaldo de UPS ideal para sus requisitos específicos.
¿Qué es un SAI?
En nuestro artículo titulado acertadamente ¿Qué es un UPS?, puede encontrar una descripción detallada que incluye casos de uso de UPS que analizan cuándo y por qué necesita un sistema UPS.. The article explains that an uninterruptible power supply provides instantaneous emergency power to critical devices—such as servers and other electronic components found in computer networks—through the energy that is typically stored in a rechargeable battery. UPS power ensures these systems continue to operate properly even when the main source of power fails. Unlike generators or other backup power supplies that can take a few seconds to kick in, a UPS system ensures no break at all in the power current, hence the name uninterruptible power supply. The UPS battery backup carries the critical load until the longer-lasting backup power supplies can engage and take over the job.
What are the differences between the main UPS topologies?
One of the key search criteria you can choose on the UPS Product Selector is product type. There are three different types of UPS typology: online double conversion, line-interactive and offline (also called standby and battery backup). In the article What Are the Different Types of UPS Systems? we explore each in detail. But the choice typically comes down to the degree of criticality and sensitivity of the equipment being protected.
Generally, an online double-conversion UPS will deliver the greatest power protection by isolating the critical load from virtually all power disturbances or irregularities in the main supply. It is always online, conditioning incoming power as well as providing battery backup. A line-interactive UPS also provides power conditioning in addition to battery backup and can protect against most power problems, however, there is a 4-6 millisecond break in power when transferring to battery back-up. Finally, the offline UPS protects against most spikes and can ride out many shortages, but it does not maintain perfect power during minor sags and surges.
Should I choose a single-phase UPS or a three-phase UPS?
Single-phase AC power is commonly used for household and light commercial applications, such as lighting and small appliances. Smaller power users, such as schools, office buildings, or smaller edge applications, can choose a single-phase UPS with confidence. However, larger data centers and other commercial and industrial facilities with power-hungry equipment typically require a three-phase power system that can deliver more power with greater efficiency. The article Three-Phase Power: What It Is and the Benefits It Brings provides a detailed explanation.
What power rating do I need to ensure the right size UPS system?
Proper UPS sizing is critical to optimize operational efficiency. Choose a UPS system that is too big, and the unit will be inefficient. Choose one that’s too small, and it won’t be able to support your power load into the future. To determine what size UPS you need, first, determine your current power load and estimate your future power load based on anticipated growth and the addition of newer equipment with higher power requirements. You will then want to choose a UPS system with the capacity to meet your maximum current load with some room to grow. To do this, you need to consider two things: the power rating in volt-amperes (VA). And the power factor. A UPS system with a power factor of only 0.8 can provide only 80 percent of its rating. A UPS system with a “unity” (or 1.0) power factor will provide 100 percent of its rated capacity. You can specify load capacity from 350VA up to 20kVA using the UPS Product Selector.
What do I need to know about battery chemistry?
The UPS Selector tool allows you to specify different types of battery chemistry, such as lead-acid or lithium-ion. A lithium-ion battery is the most technologically advanced choice. Lithium-ion technology delivers a variety of benefits for UPS systems is a white paper with more information on this subject. However, more traditional batteries, such as VRLA, often have a smaller upfront price tag. You will want to consider operating temperatures, the total cost of ownership, life expectancy, and maintenance requirements to choose the right UPS batteries for your sensitive IT equipment and specific business requirements.
What about the form factor? Where will I mount the UPS?
UPS systems come in a wide variety of form factors and the UPS Product Selector lets you choose from seven different options, including UPS systems that are convertible and can be either rackmount or tower. Other options include mini-towers, floor mountable units, desktop systems, or wall mount UPS systems. Many times, the choice is determined by the available space in your data center environment. Do you have rack space to spare? Or would you rather use wall space and free up the rack for more servers and networking equipment? Some applications will require a UPS system that is too big to fit in the rack, in which case you will need to consider tower or freestanding form factors.
How do I calculate UPS runtime to ensure the right amount of UPS battery backup?
UPS runtime is the amount of time a UPS can supply battery power to the connected load. You can calculate runtime yourself by multiplying UPS battery capacity by UPS input voltage and then dividing the sum by the total supported load (in watts.) Or you can use Vertiv UPS Runtime Calculator to determine the battery runtime for a number of different Liebert UPS models. Simply enter the model and then drag the bar on the interactive graph to the appropriate load amount to see the UPS runtime in minutes. The UPS Selector Tool also allows you to specify your preferred battery runtime at both full load and half load and see only models that meet those criteria.
¿Qué más debo considerar?
Muchas organizaciones deben (o simplemente desean) seleccionar sistemas UPS que cumplan con TAA que se fabrican o "transforman sustancialmente" en los Estados Unidos u otros países que cumplen con TAA. Otras organizaciones buscan sistemas UPS con calificación Energy Star para ayudar a lograr objetivos de eficiencia más elevados. El Selector de productos UPS le permite seleccionar una o ambas de estas opciones para encontrar una amplia gama de sistemas UPS Liebert que cumplan con estos requisitos, incluidas opciones monofásicas, trifásicas, de doble conversión en línea y de línea interactiva.
Encuentre rápidamente el sistema UPS que marca todas sus casillas.
Claramente, no hay escasez de factores a considerar al seleccionar un UPS para respaldo de energía. Una vez que conozca sus requisitos específicos, el Selector de productos UPS puede simplificar drásticamente el trabajo de encontrar un sistema UPS que satisfaga sus necesidades. Si necesita ayuda para definir sus requisitos o reducir aún más sus opciones, llame a Vertiv y deje que nuestros expertos lo ayuden a especificar la fuente de alimentación ininterrumpida ideal para su aplicación.
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