Omicron CP TD1 Reference Manual

CP TD1 Reference Manual V 1.44
92
Testing and maintaining high-voltage bushings are essential for continued
successful operation of transformers and circuit breakers. Power outages may
occur as the result of a bushing failure. High-voltage bushings used on
transformers and breakers exist in many forms, including:
Condenser
This type is most frequently used for high-voltage bushings and it is therefore
the main one focused in this guide. Cylindrical conducting layers are arranged
coaxially with the conductor within the insulating material. The length and
diameter of the cylinders are designed to control the distribution of the electric
field in and over the outer surface of the bushing. The partial capacities are
switched in series and the voltage drops across the capacities is nearly equal to
each other (Figures 7-2 and 7-3) [4.1].
Figure 7-2 Condenser bushing design [4.1]
Tap electrode
grounded
layer/flange
Grounded
layer/flange
C
A
C
B
C
C
C
D
C
E
C
F
C
G
C
H
C
I
C
K
C
J

Omicron CP TD1 Specifications

General

Brand	Omicron
Model	CP TD1
Category	Measuring Instruments
Language	English