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Requirements for Medical Electrical Equipment (Covered by IEC 60601-1)
From EN 394: Safety of machinery - Minimum gaps to avoid
crushing of parts of the human body (1993)
Crushing Zone
Zone in which the human body or parts of the human body are exposed
to a crushing/pinching hazard.
This hazard will be generated if:
- two movable parts are moving towards one another;
- one movable part is moving towards a fixed Part
Methodology
a) Identify the crushing hazards.
b) Assess the risks from these hazards
c) From table, select the appropriate minimum gap relating to the
body part at risk
d) If adequate safety cannot be achieved by the minimum gaps selected
from the table, other or additional measures and/or means shall be used
Note: A crushing zone is considered only for powered movements or
where weight or momentum may generate sufficient force to generate a
crushing/pinching hazard.
The possibility of access to a crushing zone for a particular part of
the body is dependent on the following:
- The gap between the parts;
- The depth of the crushing zone;
- The dimensions c of the opening in the protective structure and its
distance d from the crushing zone.
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