Uninterruptible Power Supply

An Uninterruptible Power Supply, also uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source, typically the utility mains, fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide instantaneous or near-instantaneous protection from input power interruptions by means of one or more attached batteries and associated electronic circuitry for low power users, and or by means of diesel generators and flywheels for high power users. The on-battery runtime of most uninterruptible power sources is relatively short 515 minutes being typical for smaller units but sufficient to allow time to bring an auxiliary power source on line, or to properly shut down the protected equipment.

While not limited to protecting any particular type of equipment, a UPS is typically used to protect computers, data centres, telecommunication equipment or other electrical equipment where an unexpected power disruption could cause injuries, fatalities, serious business disruption and/or data loss. UPS unit range in size from units designed to protect a single computer without a video monitor (around 200 VA rating) to large units powering entire data centres, buildings, or even cities.

The general categories of modern UPS systems are on-line, line-interactive or standby. An on-line UPS uses a “double conversion” method of accepting AC input, rectifying to DC for passing through the rechargeable battery (or battery strings), then inverting back to 120V/240V AC for powering the protected equipment. A line-interactive UPS maintains the inverter in line and redirects the battery’s DC current path from the normal charging mode to supplying current when power is lost. In a standby (“off-line”) system the load is powered directly by the input power and the backup power circuitry is only invoked when the utility power fails. Most UPS below 1 kVA are of the line-interactive or standby variety which are usually less expensive.

The primary role of any UPS is to provide short-term power when the input power source fails. However, most UPS units are also capable in varying degrees of correcting common utility power problems such as: Power failure; Surge; Sag; Spikes; Noise; Frequency instability and Harmonic distortion.

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Tattoo Power Supply



Along with all the equipments found in a tattoo kit, a tattoo power supply is one of those components that are often neglected as more focus is always given to the tattoo gun. But a tattoo power supply is something without which a tattoo gun cannot work.


Before a tattoo artist starts his work, he should always check the whether electricity is there, then the tattoo power supply, the wire to the plug, clip cord and the foot pedal. Only if the tattoo gun starts, then start your work. If it does not start then check the power supply again. A tattoo power supply is always checked before it is sold. If tested is not written on the power supply then do not buy it.


When a tattoo machine stops all of a sudden, then check the power supply. The tattoo power supplies are present in two types. The first is the one that works on batteries. Obviously these batteries can be recharged whenever needed. The other one is the one which works only on a.c. power. This means that if the power gets cut then you will not be able to use it. You will have to wait for the power to come again.


There are also times when carbon gets accumulated on the battery. With this help of a nail file you can remove this carbon on the battery. The carbon reduces the performance of the tattoo machine greatly. This carbon also causes poor connections and results in blockages. Clean the parts where the nail file was used. It is not advised to use sand paper as it may affect the performance of your machine.


There are also some tattoo machines that can be used through the a.c. power as well as on battery. This helps as you will not have to stop your work every time the power goes off. You can easily start using the charged batteries. These machines are used widely nowadays.



For tips on power supply – –tattoo power supply