Megger

Advantages of TDR Compared to Thumping in Underground Cable Troubleshooting

April 10, 2019
Megger, Rent Electrical Test Equipment

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.

Megger and Doble – The Best Electrical Test Equipment

March 7, 2019April 17, 2020
Doble, Megger, Rent Electrical Test Equipment

Doble F6150e Relay Testing System 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.

Three Phase Relay Diagnostics with the Megger MPRT 8430 Relay Tester

March 7, 2019
Megger, Relay Test

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.

Megger DLROs Built for Reliability

February 28, 2019April 17, 2020
DLRO, Low Resistance Ohmmeter, Megger

A low 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.

DLRO Test for Circuit Breakers

January 24, 2019
DLRO, Megger

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.

DLRO Test for Circuit Breakers

January 24, 2019
DLRO, Megger

Megger and Doble Power Factor Test Equipment

January 2, 2019April 17, 2020
Doble, Megger, Power Factor Testing

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.