# What is UPS output power factor?

Contents

## What is the power factor for UPS?

The majority of large, commercial UPS systems are now designed with a PF of 0.9. This recognizes that most of today’s computing technology presents a PF of between 0.95 and 0.98 to the UPS. Some UPS systems are even designed with PFs of 1.0, which means the kVA and kW ratings are identical (100 kVA = 100 kW).

## What is a normal power factor?

Power factor is the relationship (phase) of current and voltage in AC electrical distribution systems. Under ideal conditions current and voltage are “in phase” and the power factor is “100%.” If inductive loads (motors) are present, power factor less than 100% (typically 80 to 90% can occur).

## What is power factor of output watt of 90?

The power factor of the output watt of 90 is 0.51.

## How is UPS output current calculated?

20000 x 0.8 (kW) /3 (power per phase) / 230 (output voltage) = output current per phase, which in this case would be 23A maximum. For uninterruptible power supplies with ratings of 10kVA and below, the output power factor is often stated as being 0.7.

THIS IS IMPORTANT:  What does light you up mean?

## How many Watts does my UPS need?

When sizing a UPS for your specific requirements, the power factor matters most. Generally, your UPS should have an Output Watt Capacity 20-25% higher than the total power drawn by any attached equipment.

## How long will a 10kVA UPS last?

A 1000VA UPS might be able to power a small office computer for around seven minutes. Make the upgrade to a 10kVA UPS, and you might see this figure jump up to around twenty-sevenminutes. Go too small, on the other hand, and the available time shrinks to just a few minutes or less.

## What is 0.8 power factor?

Conventionally, alternator kVA ratings are based on a lagging power factor of 0.8. In this case the current will lag the voltage by an amount that causes the real power level supplied (kW) to fall below the kVA level by a factor of 0.8 times.

## What happens when power factor is low?

A lower power factor causes a higher current flow for a given load. As the line current increases, the voltage drop in the conductor increases, resulting in a lower voltage at the equipment. With an improved power factor, the voltage drop in the conductor is reduced, improving the voltage at the equipment.

## Is UPS a capacitive load?

In terms of type, UPS loads are referred to as either linear or non-linear, depending on how they draw their current from the mains power supply waveform. They will be inductive, capacitive or resistive.