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ABB GSA-OO, Technical Manual

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Table of contents

Design 5

Standards 5
Features and benefits 

5

Transportation and long term storage 

5

Testing 7

Routine testing 

7

Type tests 

7

Special tests 

7

Test tap 

7

Electrical data 

8

Dimensions 9
Connection details 

10

Mounting kit 

10

Integrated inner/outer terminal 

10

Solid rod conductor 

11

Positioning of stranded cable 

11

Conductor insulation 

11

Conductor loading 

12

Overloading of bushings 

12

Short-time current 

12

Recommendations for positioning 

13

Ordering particulars 

15

Summary of Contents for GSA-OO

Page 1: ... 1ZSE 2750 116 EN REV 5 Transformer bushings type GSA OO Technical guide ...

Page 2: ...odify the contents of this document without prior notice With regard to purchase orders the agreed particulars shall prevail ABB does not accept any responsibility whatsoever for potential errors or possible lack of information in this document We reserve all rights in this document and in the subject matter and illustrations contained therein Any reproduction disclosure to third parties or utiliz...

Page 3: ... 7 Special tests 7 Test tap 7 Electrical data 8 Dimensions 9 Connection details 10 Mounting kit 10 Integrated inner outer terminal 10 Solid rod conductor 11 Positioning of stranded cable 11 Conductor insulation 11 Conductor loading 12 Overloading of bushings 12 Short time current 12 Recommendations for positioning 13 Ordering particulars 15 ...

Page 4: ......

Page 5: ...nt interface between these parts has been eliminated Standards The GSA bushing is designed and tested according to IEC 60137 and IEEE C57 19 00 01 in applicable parts Features and benefits Solid Reduced risk for fire any mounting angle possible oil leakage from the bushing eliminated no monitoring of pressure and oil level Seals the transformer Reduced risk for fire risk for oil leakage from the t...

Page 6: ...able Level of rain and humidity Not applicable Pollution level Not applicable Immersion medium Transformer oil or poly buthylen Max daily mean oil temperature 90 C Max normal load 100 C emergency duty 115 C acc to IEC 60137 Oil level in transformer Not lower than 25 mm from the bushing flange Max pressure of medium 100 kPa over pressure Angle of mounting Horizontal to vertical Test tap Test tap wi...

Page 7: ...utine test protocol is delivered with each bushing Type tests Complete type tests have been performed and reports are available on request 02 Test tap 03 Test tap adapter 1ZSC003881 AAE Special tests A number of tests not specified by international standards have also been performed and reports are available on request Test tap The outer conducting layer of the condenser core is connected to an in...

Page 8: ...apacitance C1 10 pF 176 411 567 141 266 348 212 295 379 243 327 409 204 268 363 Table 3 Dimensions Dimensions are subject to modification without notice Type GSA OO Cat No Space for current transformer mm Net mass kg Dimensions in mm Total L Transformer side L1 Cable box side L2 Flange height L3 Draw lead L4 Top part L5 Cable box side L7 Condenser core outer D1 inner D2 73 LF 135 073 BA 0 7 532 18...

Page 9: ... D3 Min gasket surface inner diam D4 Hole circle D5 Flange D6 Top nut diam D7 Flange hole D8 Operating load N Test load N 60 115 250 290 110 16 8 15 3150 6300 60 155 290 335 110 16 12 15 3325 6650 60 155 290 335 110 16 12 15 3325 6650 60 155 290 335 110 16 12 15 3325 6650 60 190 350 400 110 20 8 15 3000 6000 05 Dimensions L5 L7 L2 L1 L L3 D1 D3 D8 x n1 D5 D6 2 M12 2x T D7 D2 D4 L4 ...

Page 10: ...tion Included in each packing for delivery are two lifting eye bolts M12 2183 2001 3 and a hook spanner 6896 743 1 intended for use at installation Integrated inner outer terminal The integrated inner and outer terminal is available with different inner diameters suited for different stranded cables Other configurations can be supplied on request Table 4 Material and design Conductor diameter D mm...

Page 11: ...or 20 mm below the space for current transformer and is delivered without paper insulation 08 Solid rod conductor Positioning of stranded cable It is important that the stranded cable is positioned in the centre of the lower part of the condenser core There is otherwise a certain risk that the electrical field affecting the lower end of the high voltage foil will be too high The centre position of...

Page 12: ...he GSA OO bushings is heat run tested with solid conductors and 1200 mm2 stranded cable The test currents together with calculated values for different stranded cables are given in the table below Table 6 Bushing Conductor Tested permissible current Calculated permissible current A IEC A IEEE A LF 135 073 Solid rod ø 58 mm 2500 2500 Stranded cable 1200 mm2 2000 2000 900 mm2 1500 450 mm2 1000 150 m...

Page 13: ...n below are only intended as guidelines ABB can provide assistance with field calculations to confirm the compatibility between the transformer and the bushing Table 8 Type GSA OO Internal insulation level of transformer kV Shield Distance to earthed parts with shield R1 mm without shield R2 mm 73 350 140 LF 170 020 S 130 90 LF 170 020 T 123 550 230 LF 170 020 S 200 145 LF 170 020 T 145 650 275 LF...

Page 14: ...14 TR ANSFORMER BUSHINGS TYPE GSA OO TECHNIC AL GUIDE 10 Top end shields R30 R492 R8 ø264 ø174 ø102 L2 52 14 90 265 R12 R170 ø168 ø115 L2 L5 28 10 120 50 ø50 LF 170 020 S LF 170 046 AT LF 170 020 T ...

Page 15: ...ering particulars When ordering please state Type and catalog number for bushing Catalog number for integrated inner outer terminal or conductor lower and upper part Additional accessories or modifications Test required in addition to the normal routine tests ...

Page 16: ...mponents SE 771 80 Ludvika Sweden E mail sales se abb com www abb com transformercomponents 1ZSE 2750 116 en Rev 5 2018 10 15 Copyright 2018 ABB All rights reserved Specifications subject to change without notice ...

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