ABB GSC 200, Installation And Maintenance Manual

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Installation and maintenance guide
1ZSC000563-AAX EN, REV. A, 2019-03-21
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2.2 Technical specifications
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: Transformers
Classification: Tranformer bushing
• Resin impregnated paper, capacitance graded, oil
immersed.
Ambient temperature limits: -40 °C to +40 °C. Other temperatures on request, subject to
agreement.
Maximum ambient tempe60 °C when used in valve
halls, or project specific.
Maximum altitude of site: 1000 m (Bushings for other altitudes can be provided on
request.)
Level of rain and humidity: 1-2 mm rain/minute horizontally and vertically, according to
IEC 60060-1 and IEEE Std 4.
Maximum pollution level: According to the specific creepage distance, and IEC 60815.
Immersion medium: Transformer oil. The maximum daily mean oil temperature is
current-dependent and project specific.
Maximum pressure of medium: p
g
100 kPa (p
g
= relative to ambient pressure).
Angle of installation: From horizontal to vertical.
Test tap: According to IEEE potential tap type A. U
r
= max 600 V.
Voltage tap U
r
= 6 kV as option.
Capacitance C
2
of test tap: <5000 pF
Conductor: Center-tube conductor.
Markings: Conforming to IEC/IEEE.
2.2.2 Mechanical loading
Maximum permitted static load on the outer terminal
The load must be applied at the midpoint (4) of the outer terminal or below. The total cantilever load must be
perpendicular to the bushing axis.
In the axial direction (3), 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.