JB/T 2376-1978 Capacitor transformer bushing types and dimensions JB/T2376-1978 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Oil impregpated paper capacitance graded transformer bushings
Types and dimeasions
Subject content and scope of application
GB13027-91
This standard specifies the types and dimensions of outdoor oil-paper capacitor transformer bushings (hereinafter referred to as bushings). This standard applies to bushings used for power transformers and reactors in three-phase AC systems with rated voltages of 63 to 500 kV and frequencies of 15 to 60 Hz.
2 Reference standards
GB772 Technical conditions for high-voltage insulator porcelain
GB2900.8 Electrical terminology insulator
GB4109 Technical conditions for high-voltage bushings
GB5273 Terminals for transformers, high-voltage electrical appliances and bushings GB5582 External insulation pollution migration level of high-voltage power equipment 3 Terminology
The terms used in this standard are in accordance with the provisions of GB2900.8. 4 Types and dimensions
4.1 Structural type of bushing
The bushing should be a sealed structure, filled with high-quality transformer oil, with a rain cover and an oil level gauge on the top to observe the changes in the oil level. The external wiring terminals should ensure that any turning during wiring will not affect the sealing of the bushing. The middle connecting sleeve is equipped with an oil extraction device for extracting oil samples, a measuring terminal for measurement, and a venting plug for venting when the transformer is filled with oil. The structural type of the bushing should comply with Figures 1 to 4. Model description:
The model structure of the bushing is as follows:
Additional characteristic code
Rated current
Rated voltage
Design sequence number
Structural characteristic code
Product type code
Product type code:
BR-Oil-paper capacitor transformer bushing.
Approved by the State Administration of Technical Supervision on 1991-27-15 10
Implemented on 1992-04-01
Structural characteristics:
Tail type: D-
GB13027—91
One short tail; long tail is not indicated
Whether current transformer can be installed: L-—Current transformer can be installed: Current transformer cannot be installed and is not indicated. External insulation structure: W anti-pollution type; ordinary type is not indicated. c
Design sequence number:
According to the order in product design, the design order is represented by Arabic numerals, and the order starts from 1 and is arranged in the order of natural numbers d.
Characteristic numerals:
Rated voltage in kilovolts
Rated voltage in amperes
Additional characteristic code:
External insulation pollution level: The minimum nominal creepage distance is in accordance with the provisions of GB5582, and the external insulation pollution level code is as follows: 2-the minimum nominal creepage distance is 2mmlkV; 3-the minimum nominal creepage distance is 25mmV: 1-the minimum nominal creepage distance is 31mmkV Note: Products with external insulation pollution level of 2 and above can be selected for areas with an altitude of 1000-3000mm. Model example: 11kV, 630A short-tail bushing, external insulation creepage distance 20mm/kV, current transformer can be installed, the second design (the length of the grounded part in the oil is 400mm) its model is: BRDLW2110/630-2
Figure 1 Bushing structure type I
GB 13027-91
Figure 2 Bushing structure type II
Figure 3 Bushing structure type II
GB13027-91
Figure 4 Relative position of oil pillow and mounting flange
1-Oil pillow, 2-Position of sensitive gas plug on mounting flange, 3-Oil installation position on mounting flange, 4-Oil level gauge on oil pillow 4.2 The main dimensions of the bushing shall comply with the provisions of Table 1 to Table 2. Bushing model
BR-63630
BRW-63/630- 2
BRW-63/630-3
BRW- 63/630- 4
BRIL-63/630
- 63/630- 2
BRLW- 63/630- 3
BRLW- 63/630- 4
BRL-63/1250
BRLW-63/1250-2
BRI.W-63/1250 -- 3
BRLW--63/1250--4
BR-110/630
BRW-110/630- 2
-110/630-3
BRW- 110/630-
BRI,-110/630
BRLW- 110/630 -2
GB13027—91
Porcelain sleeve
Insulation distance
Not less than
Oil immersed part
Oil connected
Ground part
Total length
Cable lead-in length
Oil middle part
Maximum
Oil pillow true
Not greater than"
Bushing (long tail)
Not greater than
Not greater than
Main dimensions
Terminal
FNumber of holes
Hole center
Circular diameter
GB 13027—91
Installation method
Sealing surface
Not larger than
Lead connector
M48×2
M33×1.5
Connecting hole
Inside the conduit
Not smaller than
Porcelain sleeve
Minimum nominal creepage
Bushing model
BRLW-110/630-3
BRLW-110/630-4
BRL - 110/1250
BRLW-110/1250 -2
BRLW-110/1250- 3
BRLW-110/1250-4
BRL.- 220/630
BRLW-220/630- 2
BRLW-220/630-3
BRLW-220/630- 4
BRL-220/1250
BRLW- 220/1250 - 2
BRLW-220/1250-3
BRLW-220/1250-4
Note: 1) L, L is the test size.
GB 13027—91
Porcelain sleeve
Insulation distance
Not less than
Oil-connected
Oil-free
Ground part!
Cable lead-in
Total length
Entry length
Oil center
Maximum
Not more than
Oil pillow diameter
Not more than
Pressure equalizing ball
Not more than
Not more than
Terminal
Hole center
Circular diameter
GB 13027-91
Mounting flange
Sealing surface
Not greater than
Lead connector
M48×2
M42×2
M48×2
Connecting hole
Inside the conduit
Not less than
Porcelain sleeve
Minimum nominal creepage
Bushing model
BRD- 63/630
BRDW - 63 /630 - 2
BRDW - 63/63 0 - 3
BRDW-63/630-4
BRDL - 63/630
- 63/630 - 2
BRDLW- 63/630- 3
BRDLW- 63/630- 4
BRDLW- 63/1250
BRDLW-63/1250-
BRDLW- 63/1250-3
BRDLW-63/1250-4
BRDL-63/2000
BRDLW-63/2000 -2
BRDLW-63/2000-3
BRDLW-63/2000-4
BRD-110/630
BRDW-110/630-2
GB 13027-91
Porcelain sleeve
Insulation distance
Not less than
2275!1150
Oil immersed part
Total length
Oil connected
Grounding part
Cable lead-in length
Oil middle part
Maximum
Not more than
Table 2 Main dimensions of bushing (short
Oil pillow straight
Not more than
Equalizing ball
Not more than
Not larger than
Tail)
Terminal
Hole center
GB 13027-—91
Mounting flange
Inside sealing surface
Not greater than
Lead connector
M33 × 1.5
M48×2
M × 2
Connecting hole
Inner diameter of conduit
Not less than
Porcelain sleeve
Minimum nominal creepage
Bushing model
BRDW -110/630-3
BRDW-110/630-4
BRDL1 - 110/630
BRDLW1-110/630-2
BRDLW 1- 110/630-3
BRDLW1-110/630-4
BRDL2-110/630
BRDLW2-110/630-2
BRDLW2-110/630-3
BRDLW2-110/630-4
BRDLW-110/1 250
BRDLW - 110/1250 -- 2
BRDLW - 110/1250 - 3
BRDLW-110/1250-4
BRDL - 110/2000
BRDLW-110/2000-2
BRDLW - 110/2000 - 3
BRDLW-110/2000-4
GB 13027—91
Porcelain sleeve
Insulation distance
Not less than
Oil connection
Grounding part
Oil immersed part
Cable lead-in
Total length
Entry length
Weight
Not greater than
Oil pillow diameter
Not greater than
Equalizing ball
Not greater than
Not greater than
Terminal
Hole center bacteria
GB 13027—91
Mounting flange
Inside sealing surface
Not larger than
Lead connector
M33 × 1. 5
M33 ×1.5
M33 ×1. 5
M48×2
Connecting hole
Inner diameter of conduit
Not smaller than
Porcelain sleeve
Minimum nominal creepage5
M48×2
M × 2
Connecting hole
Inner diameter of conduit
Not less than
Porcelain sleeve
Minimum nominal creepage
Bushing model
BRDW -110/630-3
BRDW-110/630-4
BRDL1 - 110/630
BRDLW1-110/630-2
BRDLW 1- 110/630-3
BRDLW1-110/630-4
BRDL2-110/630
BRDLW2-110/630-2
BRDLW2-110/630-3
BRDLW2-110/630- 4
BRDLW-110/1250
BRDLW - 110/1250 -- 2
BRDLW - 110/1250 - 3
BRDLW-110/1250-4
BRDL - 110/2000
BRDLW-110/2000-2
BRDLW - 110/2000 - 3
BRDLW-110/2000-4
GB 13027—91
Porcelain sleeve
Insulation distance
Not less than
Oil connection
Grounding part
Oil immersed part
Cable lead-in
Total length
Entry length
Weight
Not greater than
Oil pillow diameter
Not greater than
Equalizing ball
Not greater than
Not greater than
Terminal
Hole center bacteria
GB 13027—91
Mounting flange
Inside sealing surface
Not larger than
Lead connector
M33 × 1. 5
M33 ×1.5
M33 ×1. 5
M48×2
Connecting hole
Inner diameter of conduit
Not smaller than
Porcelain sleeve
Minimum nominal creepage5
M48×2
M × 2
Connecting hole
Inner diameter of conduit
Not less than
Porcelain sleeve
Minimum nominal creepage
Bushing model
BRDW -110/630-3
BRDW-110/630-4
BRDL1 - 110/630
BRDLW1-110/630-2
BRDLW 1- 110/630-3
BRDLW1-110/630-4
BRDL2-110/630
BRDLW2-110/630-2
BRDLW2-110/630-3
BRDLW2-110/630-4
BRDLW-110/1 250
BRDLW - 110/1250 -- 2
BRDLW - 110/1250 - 3
BRDLW-110/1250-4
BRDL - 110/2000
BRDLW-110/2000-2
BRDLW - 110/2000 - 3
BRDLW-110/2000-4
GB 13027—91
Porcelain sleevewww.bzxz.net
Insulation distance
Not less than
Oil connection
Grounding part
Oil immersed part
Cable lead-in
Total length
Entry length
Weight
Not greater than
Oil pillow diameter
Not greater than
Equalizing ball
Not greater than
Not greater than
Terminal
Hole center bacteria
GB 13027—91
Mounting flange
Inside sealing surface
Not larger than
Lead connector
M33 × 1. 5
M33 ×1.5
M33 ×1. 5
M48×2
Connecting hole
Inner diameter of conduit
Not smaller than
Porcelain sleeve
Minimum nominal creepage
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