AMP V WATT UPGRADE

Main article: International System of Electrical and Magnetic Units In SI, the unit of charge, the coulomb, is defined as the charge carried by one ampere during one second. The ampere was then defined as one coulomb of charge per second. The earlier CGS system had two definitions of current, one essentially the same as the SI's and the other using Coulomb's law as a fundamental relationship, with the unit of charge defined by measuring the force between two charged metal plates.

Prior to the redefinition the ampere was defined as the current that would need to be passed through 2 parallel wires 1 metre apart to produce a magnetic force of 2 ×10 −7 newtons per metre. It is named after French mathematician and physicist André-Marie Ampère (1775–1836), considered the father of electromagnetism along with Danish physicist Hans Christian Ørsted.Īs of the 2019 redefinition of the SI base units, the ampere is defined by fixing the elementary charge e to be exactly 1.602 176 634 ×10 −19 C ( coulomb), which means an ampere is an electrical current equivalent to 10 19 elementary charges moving every 1.602 176 634 seconds or 6.241 509 074 ×10 18 elementary charges moving in a second. One ampere is equal to 1 coulomb, or 6.241 509 074 ×10 18 electrons worth of charge, moving past a point in a second. The ampere ( / ˈ æ m p ɛər/, US: / ˈ æ m p ɪər/ symbol: A), often shortened to amp, is the unit of electric current in the International System of Units (SI).

As the current through the coil increases, the plunger is drawn further into the coil and the pointer deflects to the right.

AMP V WATT UPGRADE

Alternatively, if you are looking to upgrade your current UPS, refer to our UPS Upgrade Selector and don’t forget to utilize our Trade-UPS Program which allows you to receive up to a 25% discount on the purchase of a new APC by Schneider Electric UPS when you trade in your old model, regardless of the manufacturer.įor further discussion regarding the differences between watts and VA please refer to White Paper 15, Watts and Volt Amps: Powerful Confusion.Demonstration model of a moving iron ammeter. Please refer to our UPS Selector for help properly sizing a UPS. The difference between 0.8 or 0.9 power factors and a unity power factor (1.0) may not sound like much – but when you take into account the fact that the extra available wattage can be used to support additional loads and extend runtimes it is easy to see how the next generation of Smart-UPS On-Line will increase your availability while saving you money. Smaller models of the next generation of Smart-UPS On-Line have a 0.9 power factor or higher, and all are Energy Star™ qualified regardless of VA. Models 6kVA (6000 VA) and higher have a unity power factor – which means VA translates to an equal amount of watts (i.e. This power factor is what really matters when sizing a UPS for your specific requirements.ĪPC™ by Schneider Electric’s™ latest generation of Smart-UPS™ On-Line now delivers innovative features to help you make the most of your energy™. The ratio of the watts to VA is called the “Power Factor” and is expressed either as a number (i.e. What you really need to know is that for electronics such as computers and UPSs, watt and VA ratings can differ significantly with the VA rating always being equal to or larger than the watt rating. The watt rating determines the actual power purchased from the utility company and the heat loading generated by the equipment and the VA rating is used for sizing wiring and circuit breakers. Watts is the real power drawn by the equipment, while volt-amps are called the “apparent power” and are the product of the voltage applied to the equipment times the current drawn by the equipment. Most of us have heard of watts before – and have some understanding that each piece of equipment has a certain amount of watts it draws to operate, but how exactly does that relate to a UPS? And what does VA stand for anyway? What does VA stand for anyway?Įlectronics have both maximum watt ratings and maximum VA (volt-ampere) ratings and neither the watt nor the VA rating of a UPS may be exceeded by the attached equipment (load). So have you ever decided to research some UPSs to see which is the right fit for you, only to be left asking yourself, “Watts? VA? Huh?” Between the increasingly fragile power grid, the escalating power consumption of IT equipment and the constantly increasing importance of our network, it isn’t difficult to see the value a UPS (uninterruptible power supply) has to not only a business but a home.

Amp v watt