4
II.
Environmental protection programme
The V-Contact vacuum contactors are manufactured in accordance with the ISO 14000 Stan-
dards (Guidelines for environmental management). The production processes are carried out in
compliance with the Standards for environmental protection in terms of reduction in energy
consumption as well as in raw materials and production of waste materials. All this is thanks to
the medium voltage apparatus manufacturing facility environmental management system.
III.
Application of the X-ray emission Standards
One of the physical properties of vacuum insulation is the possibility of X-ray emission when the
interrupter contacts are open. The tests carried out at the PTB laboratories (Physikalisch-
Technische Bundesanstalt, in Brunswick - Germany) show that local emission at a distance of
10 cm from the interrupter or pole surface, does not exceed 1 mSv/h. It follows that:
– at the rated service voltage the use of vacuum interrupters is absolutely safe;
– application of the withstand voltage at power frequency, according to the IEC 60694 Standard,
is safe;
– application of a voltage higher than the withstand voltage at power frequency or of a direct
current test voltage, specified in the IEC Standard, cannot be used;
– limitation of the above-mentioned local phenomena, on interrupters with open contacts, de-
pends on keeping the specified distance between the contacts. This condition is intrinsically
guaranteed by correct operation of the drive and by transmission system adjustments.
IV.
Safety information
All the installation, putting into service, running and maintenance operations must be carried out
by suitably qualified personnel with in-depth knowledge of the apparatus.
Make sure that the personnel working on the apparatus have this manual to hand and all the
information required for correct intervention.
Strictly follow the information given in this instruction manual.
Make sure that during the installation, service and maintenance stages the standard and legal
requirements for constructing the installations in accordance with the regulations for safety in
the workplace are respected.
Check that the rated performance of the apparatus is not exceeded during service.
Summary of Contents for V-Contact VSC Series
Page 1: ...V Contact VSC Installation and service instructions 7 2 12 kV 400 A ...
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Page 35: ...33 50 50 49 49 Fig 18c Fig 18b ...
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