Standard PN-IEC 68-2-59 1996 [13] specifies a
method of testing electrotechnical subassemblies, equipment
and other products (including hydraulic valves used in
electrical applications) which during operation may be
exposed to short-duration pulsating or oscillating forces
generated by, e.g. seismic phenomena, an explosion or the
vibrations of the machine in which they are installed.