A P P L I C A T I O N O F T H E X - R A Y R E G U L A T I O N S
27
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Application of the X-ray regulations
One of the physical properties of vacuum
insulation is the possibility of X-ray emissions
when the contact gap is open. The specified
test performed by the Physikalisch-Technische
Bundesanstalt (PTB) in Braunschweig
demonstrates that the local dosage output of 1
μSv/h at a distance of 10 cm from the touchable
surface is not exceeded when the rated voltage
is applied.
The results are as follows
• Testing of the switching device or the vacuum
interrupter to VDE 0671 part 100 or IEC 62271-100
at the relevant rated power frequency withstand
voltage may only be performed by trained
personnel observing the stipulations of the
EU basic standard (Stipulation 96/29/Euratom
of the senate from 13 May 1996 (ABI.L 159
from 29 June 1996))
• Application of the rated voltage specified for
the switching device by VDE 0671 part 100 or
IEC 62271-100 is completely safe
• Higher voltages than the rated voltage or DC
test voltage specified in VDE or IEC standards
must not be applied
•
The containment of the above mentioned local
dosage output with the vacuum interrupter in
the open position is dependent on maintenance
of the specified distance between the contacts
(which is automatically ensured with correct
mechanism function and force transmission)
• Safety clearances must be maintained
Summary of Contents for VD4X
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