Sunday, March 9, 2014

Understanding The Importance Of Electrical Infrared Inspection

By Lisa Williamson


In electrical systems, high temperatures normally indicate an impending trouble. This can result from unnecessarily high resistance, short circuits, poor connections, ground fault or any other failing components common with electrical equipment. The problem must be pinpointed and rectified early enough as complete failures are normally expensive and at times can results to catastrophes. Instead of struggling to find the incipient failures through visual and other manual inspection methods which are costly, time consuming and may not pinpoint the problem, engineers are now turning to electrical infrared inspection that has proved to be the most effective alternative.

The general recommendation is that all parts of electrical system that are exposed to vibrations and or any other movements are inspected at least every six months while the rest are inspected on annual basis. For the system exposed to earthquakes, frozen winter conditions, very strong winds and tsunamis, there is a need for more frequent testing.

The target is to pinpoint any damages or potential threats resulting from improper installations, points of weaknesses, contamination, corrosion or worn out devices. The other problems can result from ground faults and improper assembly leading to increased resistance which is the recipe for overheating which on its own is a danger to the rest of the system and the surrounding objects. If left unchecked power outages are the least of problems that can result.

The devices that requires infrared surveys are the bus ducts, the distribution center, the distribution panels, receptacle panel, the transformers, lighting system, switchgears, disconnects and other components that make up the system. If well done, the uninterruptable power supply can be achieved as there is no need to shut down the system. The process of inspection takes place under the normal load without any disturbance to normal supply.

If you choose to use this form of testing, there is no need to shut down any part of the system as the testing is non-contact and nondestructive (NDT) at the same time. This means that all components can be inspected under their normal loads in the normal operating system. It involves scanning with the aim of revealing improper connections, damages and any form of flaws well in advance before they can result to any disaster.

With the endorsement and approval from the InterNational Electrical Testing Association and the National Fire Protection Association and other related regulatory authorities, it is a mistake to continue depending on the manual method of testing.

There are several benefits that comes with infrared surveys among which include the ability to pinpoint the real hot spot, the reduced down time, elimination of unplanned power outages, ability to cut down on the cost of maintaining electrical system and minimization of possible hazards and related disasters. This all translates to an efficient and reliable electrical system with reduced cost of power supply.

It is important to trust the surveying services to a company that has expert engineers, the necessary machinery for the job and well proven track record in order to enjoy the full benefits of this new technology.




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