Biblioteca Técnica

Insulation resistance measurement is one of the most widely used tests for power assets but, to achieve dependable results, it’s universally accepted that it’s essential to use a test set with a guard terminal. We look at why this is and examine the frequently neglected issue of guard terminal performance.

First trip analysis is a crucial tool to anticipate faults before they become critical, and to minimise disruption. Today’s circuit breaker analysers are very versatile. They can be configured to suit specific requirements, ensuring that users never pay for features they don’t need.

A look at testing DC bus systems using the BGL/BGFT.

Lost data records can be a problem for major power utilities. Using the right test equipment with modern asset management software can help to ensure that consumers are never without power.

Robust test leads have been specially designed for low resistance testing of wind turbines. The new leads lead to more accurate and repeatable results.

The note describes how to check the TTR calibration using the appropriate calibration box and standards, plus how to check that the different functional tests in the TTR are working.

High voltage terminations are essential components in high voltage cable systems. Great reliability is provided by high manufacturing quality and company type testing. However, onsite installations represent a considerable uncertainty for successful service of the system. UHF PD Diagnosis has proven to be a valuable and effective method for measuring high voltage assets because this online measurement is performed at frequencies which are not affected by environmental noise.

Although you will still need a combination of test instruments including an insulation test set, in the right circumstances, a TDR can sometimes locate cable faults without the need to apply a high voltage to the cable.

Vessel preparation and elimination of the effects of moisture and contamination play a major role in successful oil testing. This application note points to the precautions that need to be taken.

The measurement of winding resistance is useful in detecting a number of types of fault in a transformer. This application note discusses this in detail.