4
Technical data
Standard values are stated in the technical data.
► Always observe the bushing specification applicable to the bushing for the product-specific
values.
4.1
General operating conditions
STA
Standard
RIS
Resin impregnated synthetic
Sia
Silicone insulator (ANSI Standard)
Classification (STARIS®-
Sia+)
+
New product generation
Ambient temperature
Outdoor side: -30 … +40°C
Transformer side: Daily mean value +95°C, maximum
value 105°C
Operation height
< 1000 m above sea-level
Rain level and humidity
In accordance with IEC 60060 - I
Pollution class
In accordance with the specific creepage distance (as per
C57.19.100 "heavy" or "extra heavy")
Immersion medium
Appropriate transformer oil
Oil level below bushing
flange
≤ 15 mm
Oil pressure
Max. 200 kPa gage
Possibility to evacuate
(transformer tank)
No limitation on height and duration
Corrosion protection
All armatures and fixing material made from corrosion-
resistant materials
Marking
On name plate, as per IEEE C57.19.00
Range STARIS®-Sia+
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