BS EN 50673 pdf free download

BS EN 50673-2019 pdf free download.Plug-in type bushings for 72,5 kV with 630 A and 1 250 A for electrical equipment.
The fastening of the high voltage shielding electrode shall not restrict the current-carrying contact siirfac.es of the connection interlace hetween plug-in type hushing and equipment The high voltage shielding electrode shaH be designed so that it can be vented in every installation position, There is 8 field-free region within the high voltage shieldwiq electrode, i.e., the connection interface does not contribute to control tl,e electrical fleld.
5.4 Ground shielding electrode
The grxind sti.eklinçj ekctr(xle iriskie 11w, plug—in type hustiing sikill he estal)Ipshecl with a cnrwle(;hori point to be grounded.
5.5 Transformer drying process
In case plug-in type bushings shall be used when drying the transformer, the maximum allowed temperature shall be agreed between plug-in type bushing supplier and transformer manufacturer.
6 Thsts
6.1 General
Type.lesls, rouline-kqsts and ‘ampk tests fur saidi l)IIMJ-4n type hishirigs shall bet ikwi+t aixzxiIirij k EN 60137.
Type-tests, routine-tests and sample tests for the corresponding application shall be performed according to the relevant product standards EN 60076 series, EN 62271 series or HD 632 series.
6.2 Interchangeability of plug-in type bushings and separable connectors
Compliance is given only with the combination of the plug-in typo bushing and separable connector and cable used in the type test.
Users should be aware that separable connector performances and compatibility shall be checked It the plug-in type bushing installed In the separable connector Is different from that used for the insulated term nation (1UwiliricaIK)Il
General procedures for extension of range of approval are described in HD 629.1 S2.
For the extension of compliance to other combinations of separable connectors and plug-in type bushings, In order to ensure an interchangeability of plug-in type bushigs, the following minimum requirements shall be satisfied.
The allercialive phig—ini ly* Iuishinwj shall be citialilied in accxdarice lu clek:iric lyw tetsl nequineertierits oF
lID 632 series represented by following test sequence:
a) partial discharge test at ambient temperature,
b) 24h power frequency voltage test at 2,5 U
c) lightning irTipulse voll.ge test
d) 24h power froquoncy voltage test at 2,5 (Jo;
e) partial discharge test at ambient temperature:
f) examination of all component after completion of the above tests.
Test voltages shall be In accordance with the values given in the appropriate column of HD 632 serIes.
Extension of compliance is given, if the test seqience of the iihove tests passes successfully
7 Dimensions and Applications
7.1 Current- carrying connection intertaces
The current-carrying contact surfaces of the connection interfaces of the plug-in type shall be either bare copper or silver-coated copper or tin-coated copper or silver-coated aluminium.
Dimensions and shape for the current-carrying connection interface to equipment is not specified in this st andaril
7.2 Plug-in type bushing mounting distance
The fninwrnlrn distance lw-Iw*ee,i ilug—iri type twishiix,js shall lake into acxxxinl lhe outer (IW)etflSKNIS of
separable connectors and the necessary space for the handling during installation.
Distances inside apparatus shall take into account minimum distances to enclosure and other system voltage carrying and grounded parts and in respect to different insulating fluids.
73 Detail dimensions of plug-in type bushings
7.3.1 General
The gliniensions let *ary icu ensure adetquiate mesinling and interchangeability of InatirMj plug—in
separable connectors shall be as specified in the following Figures and Tables.
These figures do not purport to show constructional details.
7.3.2 Outside cone plug-In type bushings
7.3.2.1 General
The dimensions for outside cone plug-in type bushings are specified in Figure 1 and in Table 1.
7.3.2.2 Interface dimensIons to the separable connector for all kind of plug-In typ. bushings
The interface dimensions to the separable connector apply to both liquid filled transformers and for equipment other than liquid tilled transformers.BS EN 50673 pdf download.