Sonel S-36 VLF, User Manual

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S-36 VLF
– USER MANUAL
14
Fig. 3.4 Connecting the test equipment for sheath testing of a 3x single-core system.
The sheaths of all three cores can be tested at the same time. The cable shields at the other
end of the cable must be disconnected from ground too!
NOTE!

Before testing, measuring voltage transformers and power transformers must be
disconnected!

Ending the cable in an enclosed switchgear, so this test requires the agreement of
the contracting authority with the manufacturers of switchgear.
3.3 Avoiding radio interference
The S-36 VLF is a device of class A to EN 55011. Radio int
erference may occur when the „VLF“ test
method is used. In this case, the operator of the device will have to carry out the following protective
measures:
Before starting measurements or tests, check whether in the near-by area there are any facili-
ties sensitive to radio interference such as:

transmitting facilities,

receiving facilities,

personnel and building protection facilities,

air traffic radio installations,

medical facilities,

residential buildings,
and advise the parties in question that there may be radio interference or that electronic equip-
ment may be affected. Such checks and the notification of parties affected should be docu-
mented each time the unit is to be used.
If need be, increase the distances between the unit and the cable to be checked and the facility
which will possibly be affected.
Generally, when using the unit in industrial facilities, make sure that a protective distance of
30 m to radio-sensitive facilities is maintained.
Generally, when using the unit in residential areas, make sure that a protective distance of 60 m
to radio-sensitive facilities is maintained.