RZ Cas is an active, short-period Algol-type system where the primary component shows Delta Scuti-like pulsations. We investigate hundreds of high-resolution spectra taken with the 2-m telescope of the Thüringer Landessternwarte Tautenburg and with the HERMES spectrograph at the Mercator Telescope at La Palma over a time span of 16 years. We use a newly developed program package to analyse the radial velocity (RV) and line profile variations (LPV). Main tasks are to disentangle the line

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... and RVs of the components as well as pulsation from orbital motion. The main goal is to correlate the variations of orbital period, v sin i or differential rotation, and the occurrence, amplitudes, and frequencies of different pulsation modes with each other and with the occurrence of episodes of rapid mass transfer. Preliminary results are presented.