![]() Along with these different circuits come different safety ground impedances. When electronic systems are connected into a network, multiple branch electrical circuits are involved in powering the various network components. An online UPS or AC inverter is one answer for ensuring stable-frequency AC power for predictable equipment performance. In such cases, a frequency regulator (F) is required. In developing countries, or where power is sourced from an electrical generator, the frequency may not always be stable. POWERVAR UPM products provide conditioned, sine wave, AC power - the kind your equipment was designed to use.ĪC power in North America is generated at a frequency of 60 Hz, while in Europe and many other locales, AC power is generated at 50 Hz. Some units provide power conditioning and most do not. Some UPS products are online and others are standby, and some have true sine wave outputs and others have square wave or modified square wave outputs. A UPS converts DC energy stored in batteries into AC energy to power the electronic load temporarily. If power outages are the problem, an uninterruptible power supply (E) will be the answer. Various regulation technologies are available, and careful consideration is necessary to select the one that’s best suited for the application. The need for voltage regulation is infrequent, but when necessary, voltage swells and sags are eliminated with a voltage regulator (D). Fortunately, most equipment uses newer-style switched mode power supplies, which are largely immune to voltage irregularities. ![]() For some electronic equipment with older, linear power supply technology, well-regulated voltage is critical to proper performance. Swells and sags can originate outside of a facility but can also be created by equipment used inside the facility. Like surge diverters, noise filters shunt power disturbances to ground. Not only can noise wear away electronic components, it can also interfere with the reliable operation of digital circuits. Typically these disturbances are caused by nearby electrical “neighbors” such as lighting ballasts, appliances, motors, electrical HVAC controls, and even other computer power supplies. Power line noise filters (C) address the disturbances that slip by the surge diverter along with the low-amplitude, high-frequency noise that the surge diverter is not designed to handle. The isolation transformer also acts as an excellent “cushion” against power disturbances in general. This enhances the operation of surge diverters and noise filters because the transformer bond prevents the formation of neutral to ground voltage. ![]() The low-impedance isolation transformer (B) provides a mechanism for bonding the electrical neutral to the ground in a way that is acceptable to electrical codes. Surge diverters (as well as noise filters) shunt disturbance energy to ground, resulting in a neutral-to-ground (common-mode) voltage - a situation that’s highly disruptive to digital and microprocessor-based technologies. Although the surge diverter protects against these major power surges, transient voltages smaller than 250– 300 volts usually slip by the surge diverter, causing equipment to be exposed to degrading energy spikes over the long term. Surges are addressed with a surge diverter (A) - a device that diverts excessive voltages away from the system by shunting them to ground. Some surges contain smaller energy levels that erode components microscopically, leaving them in a weakened state. Surges can contain substantial amounts of energy, causing outright catastrophic component failure. Power surges can send your expensive computers and other electronic equipment to the dumpster. The Powervar system is based on steps of ABC’s of power conditioning.Įach step of the system of Powervar handles different phenomena and combining all the steps allows the system to remain stable, work longer and with higher yield and reliability. Powervar, an AMETEK company, specialized in developing and manufacturing UPS and UPM system, surveyed 11 of the phenomena that affect system performances and the ways to handle it. However, there are other phenomena related to our power supply that affect different systems and coping with their phenomena can increase the outcome of the system, save cost and make work more efficient. This phenomena of losing a power source is a well-known one and we have many measures to deal with it: Generators that backup the entire power supply to the site or facility or a UPS system that backup specific computers or systems. Due to this blackout a 300 million USD damages were reported (from Wikipedia). This blackout happened due to 4 lightning strikes hitting high power lines and a power plant. On July 13 th 1977, a blackout accord in New York City.
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