CLC/TC 36A - Insulated bushings

This document is applicable to vertical connecting terminal flags for insulated bushings with rated currents from 250 A to 4 000 A and frequencies from 15 Hz to 60 Hz for liquid immersed equipment.

This document is applicable to ceramic insulated outdoor bushings for highest voltages for equipment of 24 kV and 36 kV, with rated currents of 5 kA and 8 kA for insulating liquid filled transformers and frequencies from 15 Hz up to 60 Hz. This document establishes dimensions to ensure interchangeability and adequate mounting of bushings. Two types of construction are specified, type A and type B, both types for highest voltages for equipment 24 kV and 36 kV and rated currents of 5 kA and 8 kA. The mechanical stresses of the conductor tube define the difference between type A and type B. The conductor tube of type A is axially and radially fixed in the top of the bushing. The inner line terminal of the transformer can be flexible and without any special support for the lower end of the conductor tube. For new installations bushings of Type A are expected to be used. Type B bushings can be supplied at the request of a customer. In case of type B, the conductor tube is only radially fixed in the top of the bushing. In that case, a rigid support is mounted to fix the lower end of the conductor tube (for example, in combination with a drip proofed sealing end). The drip proofed sealing end is often required in the service requirements. In this case, it is not possible to use type A because of the existing double fixation. Therefore, both bushing types A and B are specified. The condition for the usage of type B is that the drip-proof sealing end is able to withstand the mechanical stress in axial direction.

Extend the scope of the EN50180-1/2/3 and EN50181 for plug-in type bushings up to 72.5 kV

This document is applicable to insulated bushings, excluding those plug-in bushings specified by EN 50180 series, for use in air insulated, shroud insulated and fully insulated cable boxes for liquid filled transformers and reactors for rated voltages up to 36 kV, and rated currents up to 4 000 A at frequencies from 15 Hz to 60 Hz.

This International Standard applies to outdoor and indoor bushings of any voltage used on DC systems, of capacitance graded or gas insulated types for use as components of oil-filled converter transformers and smoothing reactors, as well as air-to-air DC bushings. This standard does not apply to the following: • cable terminations (potheads); • bushings for instrument transformers; • bushings for test power supplies; • bushings applied with gaseous insulation (other than air at atmospheric pressure) external to the bushing; • bushings for industrial application; • bushings for traction application; • bushings for distribution class transformers. This standard makes reference to IEC 60137 for general terms and conditions and defines the special terms used, operating conditions, ratings, test procedures as well as general mechanical and electrical requirements for bushings for DC application.

NEW!IEC 60137:2017 is available as IEC 60137:2017 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60137:2017 specifies the characteristics and tests for insulated bushings. This standard is applicable to bushings, as defined in Clause 3, intended for use in electrical apparatus, machinery, transformers, switchgear and installations for three-phase alternating current systems, having highest voltage for equipment above 1 000 V and power frequencies of 15 Hz up to and including 60 Hz. Subject to special agreement between purchaser and supplier, this standard may be applied, in part or as a whole, to the following: - bushings used in other than three-phase systems; - bushings for high-voltage direct current systems; - bushings for testing transformers; - bushings for capacitors. Special requirements and tests for transformer bushings in this standard apply also to reactor bushings. This standard is applicable to bushings made and sold separately. Bushings which are a part of an apparatus and which cannot be tested according to this standard should be tested with the apparatus of which they form part. This edition includes the following significant technical changes with respect to the previous edition: - Resin-impregnated synthetic (RIS) bushings has been introduced. - Bushings with Um ≤ 1,1 kV, Um = 1100 kV and Um = 1200 kV have been introduced. - Temperature rise testing has been included for liquid-insulated bushings according to clause to 3.4. - Introducing dry lightning impulse testing as a routine test for all transformer bushings with Um > 72,5 kV. - The altitude correction procedure has been revised ( > 1 000 m). - An explanation about Very Fast Transient (VFT) phenomenon and its impact on bushings has been included.

Integrate the not accepted changes of the work of WG1 proposed in the meeting on 23th October 2014 in EN50180-3

CCMC - wrong standard reference to be corrected

IEC - Corrected version

This European Standard is applicable to ceramic and resin insulated bushings having highest voltages above 1 kV up to 52 kV, rated currents from 250 A up to 3 150 A and frequencies from 15 Hz up to 60 Hz for insulating liquid filled transformers. This European Standard establishes essential dimensions, to ensure interchangeability of bushings and to ensure adequate mounting and interchangeability of mating plug-in separable connectors of equivalent ratings.

This European Standard should be considered in factual context with EN 50180 only. The dimensional supplements are related to figures and tables of EN 50180. To enable a better understanding of additional information some tables from EN 50180 are used and extended. This European Standard may now be used also for bushings with a highest voltage of 52 kV. Figures for the details of the components and the related tables are added according to the extended range of voltage.

This European Standard should be considered in factual context with EN 50180 only. Constructional details for fastenings and their details are supplementing EN 50180. This information is of importance for utilities concerning compatibility. For a better understanding of additional information some dimension from EN 50180 are repeated in this European Standard. This European Standard was extended for fastenings of bushings for a highest voltage of 52 kV.

20130528 - Publication editing allocated to fdufour@cencenelec.eu
2021: CLC legacy converted by DCLab NISOSTS

This European Standard is applicable to ceramic insulated bushings for rated voltages up to 1 000 V, rated currents from 250 A up to 5 000 A and frequencies from 15 Hz up to 60 Hz for insulating liquid filled transformers. NOTE These bushings are suitable for operation at 1,1 kV in compliance with EN 50464-1.

This European Standard is applicable to insulated bushings for maximum voltages above 1 kV up to 52 kV, rated currents from 250 A up to 2 500 A and frequencies from 15 Hz up to 60 Hz for equipment other than liquid filled transformers. This European Standard establishes essential dimensions, to ensure adequate mounting and interchangeability of mating plug-in separable connectors of equivalent ratings.

This Technical Specification is applicable to capacitance graded outdoor bushings with values of highest voltage for equipment (Um) from 52 kV up to 420 kV and with values of rated current (Ir) up to 3 150 A and frequencies from 15 Hz up to 60 Hz for oil immersed transformers. The major insulation of these bushings consists either of oil-impregnated or resin-impregnated paper or other suitable insulating systems. This Technical Specification establishes essential details and dimensions to ensure interchange ability and adequate mounting of the bushings.

This standard is applicable to moulded indoor busbar bushings for rated voltages up to 1 000 V, rated currents from 1 250 A up to 5 000 A and frequencies from 15 Hz up to 60 Hz for insulating liquid filled transformers. NOTE These bushings are suitable for operation at 1,1 kV in compliance with HD 428.1 S1.

This standard is applicable to ceramic insulated outdoor bushings for highest voltages for equipment of 24 kV and 36 kV, with rated currents of 5 kA and 8 kA and frequencies from 15 Hz up to 60 Hz for insulating liquid filled transformers. This standard establishes dimensions to ensure interchangeability and adequate mounting of bushings. Two types of construction are specified, type A and type B, both types for highest voltages for equipment 24 kV and 36 kV and rated currents of 5 kA and 8 kA. The mechanical stresses of the conductor tube make the difference between type A and type B. The conductor tube of type A is axially and radially fixed in the top of the bushing. The inner line terminal of the transformer can be flexible and without any special support for the lower end of the conductor tube. In case of type B, the conductor tube is only radially fixed in the top of the bushing. In that case, a rigid support has to be mounted to fix the lower end of the conductor tube (for example, in combination with a drip proofed sealing end). The drip proofed sealing end is often required in the service requirements. In this case, it is not possible to use type A because of the existing double fixation. Therefore, both bushing types A and B have to be specified. The condition for the usage of type B is that the drip prooved sealing end is able to withstand the mechanical stress in axial direction.

This European Standard is applicable to ceramic and resin insulated bushings having highest voltages above 1 kV up to 52 kV, rated currents from 250 A up to 3 150 A and frequencies from 15 Hz up to 60 Hz for insulating liquid filled transformers. This standard establishes essential dimensions, to ensure interchangeability of bushings and to ensure adequate mounting and interchangeability of mating plug-in separable connectors of equivalent ratings.

IEC 60137:2008 gives the characteristics and tests for insulated bushings intended for use in electrical apparatus, machinery, transformers, switchgear and installations for three-phase alternating current systems, having highest voltage for equipment above 1 000 V and power frequencies of 15 Hz up to and including 60 Hz. Special requirements and tests for transformer bushings in this standard apply also to reactor bushings. This edition includes the following significant technical changes with respect to the previous edition: - Long duration power-frequency for transformer bushings; - Special requirements for type and acceptance tests applicable to transformer and GIS bushings; - Specific insulation levels for bushings fitted to transformers and GIS; - According to IEC Guide 111, clauses relating to safety and the environment have been added; and - The altitude correctino procedure has been revised (> 1 000 m).

Applies to outdoor and indoor bushings of any voltage used on d.c. systems, of capacitance graded or gas insulated types for use as components of oil-filled converter transformers and smoothing reactors, as well as air-to-air d.c. bushings.

Specifies the characteristics and tests for insulated bushings intended for use in electrical apparatus, machinery, transformers, switchgear and installations for three-phase alternating current systems, having highest voltage for equipment above 1 000 V and power frequencies of 15 Hz up to and including 60 Hz. Special requirements and tests for transformer bushings in this standard apply also to reactor bushings.

Supersedes HD 596 S1:1996 * D129/C012: TC 36A invited to consider TC 14 request to start the revision of EN 50386:2002 * Superseded by EN 50386:2010

This standard is applicable to insulated bushings for use in air insulated, shroud insulated and fully insulated cable boxes for liquid filled transformers and reactors for rated voltages up to 36 kV, and rated currents up to 4 000 A at frequencies from 15 Hz to 60 Hz.

This standard is applicable to ceramic and resin insulated bushings for rated voltages above 1 kV up to 36 kV rated currents from 250A up to 3150 A and frequencies from 15 Hz up to 60 Hz for insulating liquid filled transformers. This standard establishes essential dimensions, to ensure interchangeability of bushings and to ensure adequate mounting and interchangeability of mating plug-in separable connectors of equivalent ratings

This standard is applicable to insulated bushings for rated voltages above 1 kV up to 36kV, rated currents from 250 A up to 1.250 A and frequencies from 15 Hz up to 60 Hz for equipment other than liquid filled transformers. This standard establishes essential dimensions, to ensure adequate mounting and interchangeability of mating plug-in separable connectors of equivalent ratings

Specifies the characteristics and tests for insulated bushings. Is applicable to bushings, as defined in clause 2, intended for use in electrical apparatus, machinery, transformers, switchgear and installations for three-phase alternating current systems, having rated voltages above 100 V and power-frequencies of 15 Hz up to and including 60 Hz. Special requirements and tests for transformer bushings in this standard apply also to reactor bushings. This standard may also be used analogously for bushings for use in other than three-phase systems, e.g. for rectifiers, testing transformers, or for terminals for power cables (potheads) and capacitors.

Superseded by EN 50387:2002

Superseded by EN 50386:2002