The National Fire Protection Association (NFPA) 70B 11.17.5 suggests that every commercial and industrial building should have an IR survey at least once a year.
Our services of Infrared Electrical Inspection:
- Predictive Electrical Maintenance
- Mechanical Equipment (abnormally warm motors or possible bearing failures)
- Electrical Components Fluid Systems (line blockages, tank levels or pipe temperatures)
- And others that related to heat transfer
Thermal Imaging which often called as Infra Red, Infrared, Thermography, Thermovision and often called in bahasa as Infra Merah, Inframerah, Thermografi, Thermovisi has proven to be an ideal inspection method for all types of predictive electrical maintenance. Infrared technology gives thermographers the ability to “see”, measure and record temperatures on defective components and the normal wear, corrosion, fatigue and faulty assembly that occurs in many electrical systems.
When an electrical system begins to have problems, it gives off heat as a byproduct of electrical resistance. Infrared cameras record and visually display this emitted heat to show the exact location of the electrical defect. Thermal imaging simplifies diagnosis and repairs while protecting adjacent electrical components from hot spots. Routine thermal electrical inspections will reduce repair costs and decrease lost production hours that result during unexpected down time.
Overheating can occur in any electrical component including generators, transformers, pole top connections, insulators, disconnects, jumpers, shoe connections, fuse connections, switchgear, starters, contactors.
An infrared electrical inspection / infrared thermography inspection of your facility using Infrared Camera (Infra Red Camera) can provide you with valuable information about the condition of your electrical system and equipment that can save thousands of repair dollars and hundreds of hours of lost productivity. Even worse, unchecked electrical system failures can result in fires or dangerous explosions. Infrared inspections are designed to identify potential equipment failures before they happen so that appropriate preventative action can be taken. The decreased liability of a thermally inspected electrical system even encourages some insurance providers to offer discounted rates.
INFRARED THERMOGRAPHY FOR ELECTRICAL INSTALLATION
Electrical component will usually show signature that originate from heating from a current passing through a conductor with a certain resistance, i.e. Joule’s Law. Sometimes the current can be induced by a magnetic field, but the heating takes place according to the same mechanisms.
TYPICAL FAILURE MODES
A failing connection will have an increased resistance for a number of possible reasons. Corrosion is a frequent cause of failure as well as dirt, dust and faulty installation.
Breakers and contactors can develop internal faults in the contacts themselves, and also in the internal connections that may exist.
An overheated component may also cause arcing. If a highly-loaded circuit suddenly opens up by fusing of a part of it, there may be an arc as a result. Remember that an arc will start easier at higher voltages, but the energy of an arc is depending on the current. With a high current, a lower voltage circuit may cause disaster as well.
There is also a risk of fire caused by electrical faults. In Insurance statistics of industrial fires worldwide electrically induced fires are always represented, typically to a degree of perhaps 20% or so. Even a small fire may very well prove to be the end of the life of a production facility. It my never produce again.
SCIENTIFIC BACKGROUND FOR USING THEMROGRAPHY
A correctly working termination will have a low resistance. When the resistance goes up, the termination becomes hotter. The heating power follows Joule’s Law (P= R x I2). As the heating power goes up, the temperature goes up as well, but not in direct proportion to the power.
It is recommended that the load should be 50% or higher when the survey is done. At lowe loads the target signatures can become very weak and difficult to see.