Recently Published Blogs

Locating cable problems through visual inspection, continuity and insulation resistance testing can be difficult and time-consuming especially on long installations. To help you save time, effort and money in troubleshooting cables, consider using a Time Domain Reflectometer. This diagnostic tool is very efficient and accurate because it can help localize the fault from where you are in a matter of seconds. After prelocating the fault, you can then run other diagnostic techniques to verify the defect. Time domain reflectometry is not only effective in finding faults in electrical cables. It can also be used for various installations for cellular, telephone and cable TV installations.Contact Us Now

 

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A ground is a crucial component in any electrical system. It routes electricity to the Earth when electrical insulation fails. Ultimately, it provides a definitive path in theses instances and prevents the electrical path from including anyone or anything else. Additionally, enclosures for electrical apparatus as well as radial conductors for cabling are often grounded in order to provide shielding from electrical noise or radiated interference.

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Power factor testing is a diagnostic test that is commonly performed to quantify and trend characteristics of electrical insulation. A regular testing and maintenance program that includes power factor testing can aid in determining the health of electrical insulation as well as where it is in its life cycle and how to plan for taking it out of service.

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When it’s time to assess the condition of electrical insulation in high voltage conditions such as transformer equipment, circuit breakers, cables, bushings and rotating machinery, there is no better solution than the Megger Delta-2000 Power Factor Test Set. Megger C & DF (Power Factor) test units are known for their comprehensive insulation diagnostics, and the Delta-2000 lives up to the Megger name.

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There are three types of ohmic battery testers — impedance testers, conductance testers and resistance testers. Each method is recognized by the IEEE and each can be used as a means of determining the State-of-Health (SOH) of a battery.  Perhaps one of the greatest values of ohmic testing is that it is performed while the battery is on-line and it fills the gap between discharge tests by providing an indication of internal changes to the battery.

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Common methods of finding faults in direct buried cables is arc reflection or simply thumping. Thumping is a method that is performed by discharging a large amount of energy into a cable. This electrical energy will seek to arc across the path of least resistance to ground, which in this case would be the electrical insulating material that separates the center conductor from the outer shield, or concentric neutral.  When that arc occurs it often makes an audible thumping sound in the vicinity of the arc. If thumping is being performed where there is high ambient noise, or for some reason cannot be heard, directional acoustic detectors can be used in pinpointing the fault location. However, this method may require the cable to be thumped for a lengthy period of time while walking the path of the cable and listening.  If a TDR (Time Domain Reflectometer) is incorporated into the test, along with a thumper, then when the arc occurs, the TDR will reflected the change to the impedance of the insulation at the location of the fault. This would be the Arc Reflection method and can significantly reduce the thumping time necessary to locate the fault.  It can be used to localize the fault and if necessary pinpointed using an acoustic fault detector.

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Relays undergo electrical and mechanical stress during operation. This can result in the premature deterioration of the relay system. It is a good idea to always check if the relays are working properly. Additionally, acceptance testing allows verification of the programmed characteristics of the relay. This lets you correct operational deficiencies or programming errors prior to it becoming an issue.

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Electrical test equipment rental is very common these days. There are many companies that give you different kinds of testing devices at reasonable rates. Devices like oscilloscopes, network analyzers, function generators, spectrum analyzers, logic analyzers, and telecommunication test equipment are readily available for rental or lease. But the problem is, which one should you rent? For this, you need to analyze your needs and understand your requirements. Two major companies in the electrical testing industry are Megger and Doble.

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Contact Us Nowlow resistance ohmmeter can be used to identify many of the issues that stem from poor electrical connections. Contact resistance is a term used to characterize the quality of an electrical connection. Electrical bonds are a component of everything that requires a connection to an electrical path such as junction boxes,bus work, circuit breakers and switches to name a few.  Poor connections can lead to excessive heating, premature equipment failure and damage to the electrical system itself. A good testing and maintenance program will include a low resistance ohmmeter to ensure the quality of electrical connections. 

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With the continuous evolution in all industries, everything has become more dependent on electrical devices and systems. This increasing dependence calls for certain steps to ensure reliable and consistent functioning of the devices. This is why most companies carry out regular testing and diagnosis of electrical devices and systems using high quality, efficient, and reliable electrical test equipment.

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Finding the right diagnostic test to maintain and protect electrical equipment means using the best manufacturer’s equipment to get the right product for the job. When it comes to the power factor test, two makers stand out with reliable and accurate equipment that users can count on to perform optimally every time.

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The Megger SMRT46 Multi-Phase Relay Test System is a multipurpose, light-weight, field portable test set capable of testing a wide variety of electro-mechanical, solid-state and microprocessor-based protective relays, motor overload relays and similar protective devices.

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