Table of Contents
Advertisement
5.2.3 Measurement of capacitance and dissipation factor
Overview
After installation of the bushing, it is recommended to measure the capacitance values for future reference,
such as repairs, service etc. This can be done on an installed bushing because it has an insulated test/voltage
tap. Refer to 2750 515-142, "Bushing diagnostics and conditioning".
•
C
is the capacitance between the test/voltage tap and the outer terminal.
1
•
C
is the capacitance between the test/voltage tap and ground.
2
NOTE!
The transport container must be removed before measuring the capacitance and dissipation factor
(tan δ).
Nominal capacitance
The capacitance (C
for all service conditions. Thus, it is important to measure and record the capacitance (C
reference, such as repairs, service etc.
Type
GSBK 170
GSBK 245
GSBK 362
GSBK 420
GSBK 550
48
) depends on the transformer, and it is not possible to give a nominal value that is valid
2
Space for CT = 300 mm
C
1
496
500
405
346
286
) for future
2
Space for CT = 600 mm
C
1
656
622
494
424
353
Installation and maintenance guide
1ZSC000563-AAB EN, REV. 6, 2019-09-12
Advertisement
Table of Contents
