Installation and maintenance guide
1ZSC000563-AAB EN, REV. 6, 2019-09-12
11
2.3 Technical specifications
2.3.1 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.
•
Temperature class E (120 °C) according to IEC 60137.
Ambient temperature limits:
-40 °C to +40 °C.
Immersion medium on switchgear side:
SF
6
gas.
•
Maximum daily mean temperature: +75 °C.
•
Maximum pressure: 850 kPa (abs).
•
Minimum pressure: 350 kPa (abs).
Immersion medium:
Transformer oil.
•
Maximum daily mean oil temperature: +90 °C.
•
Maximum temporary oil temperature, at normal load:
+100 °C.
•
Maximum temporary oil temperature, at short time
overload: +115 °C.
Oil-level in transformer:
Not lower than 30 mm from the bushing flange.
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:
According to IEEE potential tap type A. U
r
= 6 kV.
Capacitance C
2
of test tap:
<5000 pF
Arcing horns:
N/A
Conductor:
Center-tube conductor.
Markings:
Conforming to IEC/IEEE.
Содержание GSBK 170
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