Root Cause Analysis of the abnormal noise affecting EMT604/AF3 transformer

Tuesday 2 Jul 2024, 09:00 → 10:00 Europe/Zurich

40/S2-C01 - Salle Curie (CERN)

Katy Foraz (CERN)

Presentation by Giuseppe Cappai EN-EL-MO

Abstract:

A 3.15 MVA 18/0.4 kV transformer powering the radiofrequency (RF) amplifiers of the Super Proton Synchrotron accelerator at CERN exhibited intense anomalous noise during the so called “cavities training”. A root cause analysis was conducted covering the following activities: transformer inspection, on-site electrical, thermal and acoustic measurements, and electromagnetic simulations. The presentation describes the multidisciplinary approach used to identify the root causes, including those related to RF pulses generation and the interaction with the upstream power system, along with the formulation of a theory regarding the origin of the phenomenon and the analytical identification of the specific harmonic frequencies involved.

Finally, the solution adopted to minimize both the noise generated by the transformer and the harmonic pollution of the network is presented.

09:00 → 09:30 Root Cause Analysis of the abnormal noise affecting EMT604/AF3 transformer

Speaker: Giuseppe Cappai (CERN)

Root Cause Analysis of the abnormal noise problem affecting EMT604-AF3 transformer_ENTM_v12.pdf

Root Cause Analysis of the abnormal noise problem affecting EMT604-AF3 transformer_ENTM_v12.pptx

09:30 → 10:00 Discussion