7.3.1 Measuring equipment
► Use appropriate measuring equipment or contact HSP.
7.3.2 Measuring procedure
The measuring procedure differ by the coupling of the measuring signal:
● With not grounded measurements, the test voltage is applied to the conductor on the
bushing and the measuring signal is taken from the test tab on the bushing.
● The “grounded” measuring procedure is used if the bushing to be measured does not
have a test tab.
The bushings in this range have a test tab.
► Take further details concerning the measuring procedures from the instruction manuals of
the measuring equipment.
7.3.3 Threshold values
There are threshold values for the material RIS (resin impregnated synthetic) for the
deviation of capacity and the power factor from the reference value.
The effect of the ambient temperature must be taken into account when carrying out the
measurements:
Fig. 18: tan δ (T
U
) and ΔC/ΔC
0
(T
U
)
Range STARIS®-Sia+
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