Megger TDS40, Operating Manual, Page: 27 / 71

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3. SETTING UP OPERATION
3.1 Safety Precautions
Before starting any operation, always observe the 5 rules of safety:
• Disconnect the test object
• Protect it against reclosure
• Check for absence of voltage
• Connect it to earth and short-circuit it
• Cover all neighbouring parts carrying voltage or seal them off by a barrier
In order to prevent any damage to persons and/or installations that might directly be
caused by the operation of the test and diagnosis system alone or in combination with
other systems or instruments, always observe the following safety precautions:
Make sure there are no unprotected systems or system components carrying voltage in
the immediate vicinity of the test and diagnosis system with which you or your system
may unintentionally get into contact. This applies in particular to all components under
high voltage or components the voltage of which is not known.
Protect these components by putting up insulating covers. If, for technical reasons, this
cannot be done, disconnect these components or have them disconnected for the
duration of your test at this site after having consulted the relevant supervisor and asked
for his/her permission. Make sure this measure is carried out properly.
Take a test measurement using an appropriate voltage meter. Beforehand, check the
proper operation of this meter, e.g. by taking a test measurement of a known voltage.
Position your system in a place suitable with regard to its dimensions and its weight.
Check whether the system stands in a stable position.
Make sure that the site where the HV module is situated is vented properly to avoid the
accumulation of ozone during lengthy periods of operation.
Make sure that no other system/system component is restricted in its operation by the
presence of your test and diagnosis system. If due to the installation and operation of
the test and diagnosis system some changes have to be made on another
system/system component, always make sure that the former condition is restored after
all operations have been concluded. Observe the special requirements of these
systems/system components without fail, and start any operation on them only after
having consulted the supervisor in charge and asked for his/her permission.