ABB Power Grids Ltd.
GKSL 680205.021 RE
Rev. 2, 26.09.2019
4
1 General
The requirements of this instruction apply to 110 kV transformer bushings type BRIT-90-35-200/1000 with
solid RIP-insulation. This manual is designed for operational and maintenance personnel of power stations
and power network and installation companies’ staff. The manual provides basic instructions for installation
and maintenance of this type of bushings. The manual does not cover any repair aspects. If a bushing was
damaged during transportation, installation or usage, you should contact to ABB Power Grids Ltd for repair
and retesting.
2 Purpose
Bushings with solid RIP-insulation (resin impregnated paper) are insulators used for getting out high
voltage from a transformer tank and are structurally independent devices. These bushings are intended for
use in UKHL1 and T1 climate (according to GOST15150-69).
3 Technical data
Table 1 outlines the main technical data of these bushings.
Table 1
Type of bushing
BRIT-90-35-200/1000
Catalogue number of outline drawing
КН
1.9.009T
Rated voltage, kV
35
Rated highest voltage U
max
, kV
40,5
Maximum line-to-ground voltage, kV
23
Dry withstand test voltage (1 min, 50 Hz), kV
110
Wet withstand test voltage (1 min, 50 Hz), kV
85
Voltage of test lightning impulse 1.2/50
s, kV
200
Rated current, A
1000
Partial discharge level at 2,0*U
max
/
3, pC
< 2
Maximum angle to vertical
90
Rated thermal short-time current (
I
th) (2 s),
кА
25
Maximum through short circuit current (peak value), kA
62,5
Creepage distance (mm) and the relevant degree of
contamination
1400 (IV)
Arcing distance, mm
418
Test cantilever load, 1 min, N
1250
Seismic stability, MSK-64
9
Installation above see level, m
≤
1000
