What Is Va Rating On Ups

10A x 120V 1200 VA.

What is va rating on ups. Sizing the UPS to operate at 75 percent capacity results in a UPS with a 1000 VA rating 750 VA 075 1000 VA. Some uninterruptible power supply UPS systems are rated in kilowatts kW and others in kilo-volt-amperes kVA. The Watt rating relates to the amount of power it can deliver and the VA rating relates to the amount of current it can deliver. The power rating of the UPS UPS have both Watt ratings and VA ratings.

These relate their Ah capacity to their rate of discharge. In simple terms imagine UPS power capacity as the amount of soda in a glass. This is managed by labelling batteries with C ratings. The basic rule of physics that watts volts x amps is based on direct current circuits.

Using the equation above we see that the minimum VA rating wed want for our 400w needs would be a 640 VA rated system. When a UPS powers equipment which presents a reactive load with a low power factor eg a computer neither limit may safely be exceeded. VA is an abbreviation of the electrical term volt-amps and indicates a capacity of power. The VA figure is nominally 167 times 167 percent of the power consumption in watts.

Neither the VA nor the W rating of an InverterUPS can be exceeded. When purchasing a power source such as an uninterruptible power supply UPS for use with electronic equipment including computers monitors and other peripherals be sure the VA specifications for the equipment are used when determining the minimum ratings for the power supply. Exceeding the VA rating of your ups is a common cause of UPS problems even when the power is not out. The Watt rating of a load represents the actual power consumed by it while the VA rating is the apparent power consumed by it and is larger than the actual power due to some currents called reactive or harmonic currents that flow in and out of loads without actually delivering any.

When choosing a UPS be sure that the total VA requirement of supported equipment does not exceed the VA rating of the UPS. A simple rule-of-thumb calculation you can use to determine how much UPS is as follows. The ratio of watts to VA is called the power factor and is expressed either as a number ie. UPS are generally rated in Volt-Amps VA however they will also have a WATTS rating.

VA is always equal to or greater than the Watts. 120 100 110 230 200 208 220 240 Device List. Multiply the total by 12 to get the grand total. VA Watts Operating voltages.

In recent times this has begun to change as many UPS have begun to have closer Watt and VA output ratings. VA Voltage x Amps Watts Voltage root-mean-squared x Amps root-mean-squared x Power Factor PF a three-phase circuit would multiply the voltage by the square root of 3 or approximately 1732 1 BTU British thermal unit Watts x 3413 1 BTU 1055053 joules J. Amps x volts x 1732 VA. It is used by UPS manufacturers more often than Watts because it makes the UPS sound bigger.

Amps x volts x 1732 VA. Neither the Watt nor the VA rating of a UPS may be exceeded. 08 or a percentage ie. In most cases UPS manufacturers only publish the VA rating of the UPS.

In reality a VRLA lead-acid batterys Ah rating isnt fixed but depends partially on the rate at which its discharged. The VA rating is limited by the maximum permissible current and the watt rating by the power-handling capacity of the device. Find a UPS using this configuration. Converting amps to VA.

Use the grand total to select a UPS. The Power Factor For computers and UPS units watt and VA ratings can differ significantly although VA rating is always equal to are larger than watt rating. Add the VA subtotals together. However it is a standard in the industry that the Watt rating is approximately 60 of the VA rating this being the typical power factor of common loads.

Multiply amps by voltage 120 volts in the US. Sizing the UPS to operate at 75 percent capacity results in a UPS with a 1000 VA rating 750 VA 075 1000 VA. This step accounts for future expansion. How to avoid sizing errors.

For example 240 volts x 125 amps 3000VA. In simple terms imagine UPS power capacity as the amount of soda in a glass. The relationship between the two is called the power factor. However it is a standard in the industry that the Watt rating is approximately 60 of the VA rating this being the typical power factor of common loads.

Converting amps to VA. When a UPS powers equipment which presents a reactive load with a low power factor neither limit may safely be exceeded. The VA rating of your unit represents the volume of electricity that the unit is designed to protect. Qty Product Watts X.

10A x 120V 1200 VA. Alternating current AC supplies buildings and equipment with energy. In most cases UPS manufacturers only publish the VA rating of the UPS. The VA rating is limited by the maximum permissible current and the watt rating by the power-handling capacity of the device.

Multiply amps by voltage 120 volts in the US. Therefore it is safe to assume that the Watt rating of the UPS is 60 of the published VA rating.