Surge
A surge occurs when there is a sudden transient increase in an electrical current. Surges are generally caused when an item drawing a large amount of electricity (air conditioners, refrigerators, copiers, etc.) is turned off. Such items use extra power which is released back into the power lines when they are turned off. Although they occur frequently, surges can be very short duration and you may not notice them. A surge can cause damage to your computer and corrupt your valuable data. Energizer UPS systems are designed to protect your system from surges.
Spike
An instantaneous increase in voltage results in a spike. Spikes may be caused by lightning or overloaded power grids. Spikes can cause serious damage to your computer, modem and other electronic components. All Energizer UPS systems are designed to protect your system against the damage that can be caused by spikes.
Brownouts
A brownout occurs when there is a reduction in incoming voltage. Brownouts are the most common form of power interruptions, accounting for over three-quarters of all power problems. When brownouts occur, the lower voltage causes your computer system to work harder then it should. This can cause excessive wear and premature failure of critical components. Energizer UPS systems can recognize and correct this damaging power problem.
Voltage Sag
Voltage sag is another term for a brownout.
Power Failure
A power failure is a complete interruption of electrical power. A power failure may cause damage to your hardware and loss of data. Once power is restored, there is still the risk of post-power failure surges, spikes and sags. An Energizer UPS system will provide the power to keep your system running, giving you the chance to save data and shut down the system properly.
Line Noise
Interference from other electrical appliances such as hair dryers, microwaves and vacuums can cause line noise. Fluorescent lighting may also cause line noise. An example of line noise is the "snow" that appears on a TV screen while other appliances are running.
Volt-Amps
You need to know how much capacity you need before purchasing an Energizer UPS. Capacity is measured in volt-amps. To calculate the number of volt-amps needed, take the number of amps multiplied by 120. To determine the measurements in watts, multiply by 1.67. For example, if a monitor uses 2 amps (2 x 120 = 240) and a computer uses 100 watts (100 x 1.67 = 167) the total volt-amps needed is 407 (240 + 167 = 407). Energizer has a UPS sizing guide available to assist with your calculations.
Joules
A unit of energy is a joule rating. Joule ratings are given on UPS systems to indicate how much surge protection it provides. Often the total joule rating (number of outlets x rating for each outlet) is listed as the joule rating for the unit. It is important to purchase a UPS that has a joule rating of 400 or greater to insure efficient and comprehensive protection for your system.
Watts
A watt is a unit of power. A system's power supply is listed in watts in order to show the amount of power that it is outputting into your system.
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