Power-Line Filters

Power-Line FiltersVoltage steps in electric circuits can cause undesirable results. A power-line filter helps you protect expensive electronics from such problems. A power-line filter looks like a power-line extender. However, this device contains a varistor. The latter protects the connected device from impulse interferences and short-time voltage steps in the mains. Such elements as the capacitor and a symmetrical choke protect devices from high-frequency interferences. The third line of protection is the fuse cutout. It cuts off the power supply if the other elements can't handle the load. Before buying a power-line filter you need to determine where it will be used. Some models are designed for household uses. They are advisable if you have children. Other models are designed for offices. One of the main parameters you should pay attention to is the maximum surge current. This parameter determines the strength of the voltage steps the device can handle. Some filters can even deal with the results of a lightning stroke. A power-line filter is also used as an extender. This is why its length is important. 1.8 metres will be enough for household applications. Some models are up to 5 metres long. These are used in large rooms. Power-line filters have an LED indicator. When the filter is plugged into the mains and is operating normally, the LED is on. The LED is off if one of the protecting elements has failed. This feature is of great importance. When the power-line filter is used in a home, there are usually no other ways to know if it's still working. The filters used in offices must have the following features. They should be multifunctional. They should have many sockets. And naturally they should be able to give protection from considerable voltage steps and interferences. Don't try to save on power-line filters for your office. If an important device will burn out the consequences for the company may be very serious. There is no doubt that power-line filters are necessary. Replacing broken equipment will cost you much more than such a filter. However, you shouldn't overestimate the capabilities of these devices. Remember, a power-line filter protects from voltage steps and high-frequency interferences. At the same time it won't save you if the power supply is down. That means a power-line filter is a basic means of protection.

Category:

Science & Technology

Tags:

• closing
• electric power
• filter
• noisy signal
• protection

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