Los transformadores industriales se utilizan mucho y pueden ser extremadamente grandes. Cuando se construye o repara un transformador, es esencial comprobar que es completamente estanco. Esto es crucial, ya que los transformadores se llenan con aceite mineral, que se utiliza para refrigerar el aparato, proporcionar aislamiento eléctrico y proteger contra la oxidación.
Si se detecta una fuga durante el llenado, hay que vaciar todo el aceite antes de poder solucionar el problema. Esto conlleva considerables pérdidas de tiempo y dinero.
At present, transformers are tested by filling them with dry air to an overpressure of 200–300 mbar. This pressure is maintained for several hours to check for any pressure drop, which indicates leaks. A higher test pressure is not possible due to the transformer’s construction. Components such as pressure relief valves, cooling fins and certain joints cannot withstand higher pressures. If a pressure drop is detected, a soapy water solution is used to locate leaks. All joints and connections are checked manually. The formation of air bubbles indicates a leak.
This method is:
It is therefore the case that leaks only become apparent once the transformer has been filled with oil and is operational.
CS INSTRUMENTS has over 20 years’ experience in ultrasonic leak detection. This technology makes it possible to detect leaks without the system needing to be on overpressure.
A compact ultrasonic tone generator is placed inside the transformer, requiring only an opening of 8 cm in diameter. Bespoke solutions are available for smaller openings. The sound source emits a powerful ultrasonic signal in multiple directions, which propagates throughout the entire transformer. An ultrasonic leak detector can then be used on the outside of the transformer to easily determine where leaks are located. Where a leak is present, the ultrasonic signal escapes and is detected by the leak detector responding to the ultrasonic tone.
Advantages of this method:
Thanks to this approach, a complete transformer can be checked for leak-tightness quickly and reliably, with a significant reduction in working hours and the risk of missed leaks.
Detecta múltiples fugas simultáneamente con Power Beam Forming único en el mundo. Tecnología de 4ª generación, también apta para otros gases. Ayuda a localizar y rectificar fugas, incluida la estimación de costes y la documentación ISO 50001.
utiliza 30 Micrófonos MEMS para calcular y visualizar la imagen ecográfica. El dispositivo también hace audibles los ultrasonidos inaudibles.
Set para la detección de fugas, gracias a la cámara integrada y los accesorios incluidos, permite no solo una detección confiable de fugas, sino también el cálculo y la generación de informes de fugas de acuerdo con ISO 50001.