|
1. Introduce
The transformer bushing is used in power transformer or breaker or other apparatus, and used to ensure the conductor pass through the shell of the apparatus. And to keep the primary high-voltage insulate from the transformer shell, and be made from the pure porcelain.
The transformer porcelain bushing is made of porcelain tube, conductor, seal, terminal attachments and flange.
2. Insulate level of common voltage
|
Rated voltage
kV
|
System voltage，kV
|
Power voltage
|
Lightning impulse withstand voltage(peak),kV
|
|
withstand
|
Breakdown
|
Corona
|
|
7.2
|
6
|
23
|
58
|
-
|
60
|
|
12
|
10
|
30
|
75
|
-
|
75
|
|
24
|
20
|
50
|
120
|
14.8
|
125
|
|
40.5
|
35
|
80
|
176
|
25.8
|
185
|
Note: 33kV 36kV is same with the 40.5kV
|
