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2.2 Technical specification
2.2.1 General specifications
Refer to the table for the standard technical specifications of the bushing. For conditions exceeding the
specifications, please contact ABB.
Application:
Classification:
Ambient temperature limits:
Maximum altitude of site:
Level of rain and humidity:
Maximum pollution level:
Immersion medium:
Oil-level in transformer:
Maximum pressure of medium:
Angle of installation:
Test tap:
Conductor:
Markings:
2.2.2 Mechanical loading
Maximum permitted static load on the outer terminal
The load must be applied below the midpoint of the outer terminal. The total cantilever load must be
perpendicular to the bushing axis. The bushing installation angle can be 0° – 60° from vertical.
Only bushings that are specified for horizontal installation can be installed at 90° from vertical.
In the axial direction, the bushing can withstand a static load of 20 kN.
NOTE!
The loads described in this section are static loads, for dynamic loads such as earthquakes and
extreme wheather conditions, please contact your ABB sales representative.
12
Transformers/reactors
Transformer bushing
•
Oil impregnated paper, capacitance graded, oil immersed.
•
For outdoor and indoor use.
-40 °C to +40 °C, limit temperatures.
1000 m (Bushings for other altitudes can be provided on
request.)
1-2 mm rain/minute horizontally and vertically, according to
IEC 60060-1 and IEEE Std 4.
According to the specific creepage distance, and IEC 60815.
Transformer oil.
•
Maximum daily mean oil temperature: +90 °C.
•
Maximum temporary oil temperature, at short time
overload: +115 °C.
Not lower than 30 mm from the bushing flange.
p
100 kPa (p
= relative to ambient pressure).
g
g
0° to 60° from vertical.
(GOE 1300, 1425 and 2550-1675 0° to 30°.)
Test tap with 8 mm male contact pin.
According to IEEE type A.
Center-tube conductor, or draw lead.
Conforming to IEC/IEEE.
Installation and commissioning guide
2750 515-1 EN, REV. 14, 2020-06-26
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