CEI EN 61587-5

Scope and object

This part of IEC 61587 specifies seismic test requirements for
chassis, subracks, and plug-in units as defined in the IEC 60297
and IEC 60917 series. It applies in whole or in part, only to the
mechanical structures of chassis, subracks, and plug-in units for
electronic equipment, according to the IEC 60297 and IEC 60917
series, and does not apply to electronic components, equipment or
systems within the mechanical structures.

NOTE Subracks may be an integral part of a chassis (often called
in the industry a shelf or a crate).

The object of this standard is to establish a level of physical
integrity of chassis, subracks, and plug-in units according to IEC
60297 and IEC 60917 series that may provide a level of
survivability that will preserve functionality during and after a
seismic occurrence. It is intended to provide the user with a high
level of confidence in the selection of an equipment practice to
meet such needs.

Since IEC 60297 and IEC 60917 series chassis, subracks, and
plug-in units come in many sizes, weights and mechanical
complexities, it is not possible to define a single minimum seismic
test requirement for all weight categories. Therefore, overall mass
categories are defined in this standard. However, the mass
distribution inside a chassis and subrack is considered
"application-specific" and herein defined as "intended use".

The single-axis or tri-axis acceleration for the seismic testing
is selectable.