DE1736188U - CAST RESIN CURRENT CONVERTER. - Google Patents

Description

30622.11456

SIEMENS

SIEMENS & HALSKE AKTIENGESELLSCHAFT

Berlin and Munich
Patent department

6/054

Cast resin flow converter. .

To the in GiessharziatromwandlQra ζ. To absorb dynamic effects occurring in the event of high overcurrents and thus to eliminate the risk of the cast resin body forming a kiss , it was begun to provide an elastic intermediate layer between the current-conducting files of the converter and the G-iesshar2ikc * body. Yfenn.nuit das G-lesshariS so strong sclmöapf at its äushärtvng: t that the elasticity of the intermediate layer -f its limit erreicht- so the electrically conductive file can also in such a design a Siesshar-zetröia "converter in expansion due starter Erwärsiung the case arise that! the Siessharzkörper, which then has to absorb the resulting internal "pressure" due to the lack of elasticity of the upper layer, tears. Uio. in this case too, the risk of ice build-up must be eliminated. Renewal Gesiäse the winding bzv /. the iron core of the Gieöshargströräwandler provided with it is provided with a coating of material that is elastic at temperature, possibly blem, and enveloped with an oil seal, the coefficient of thermal expansion, while maintaining an intermediate space. is less than Aev of the elastic material j

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9/710/1684

The space in between has become after application of the heated cast iron to the body consisting of winding and coating, which is also heated to the casting temperature of the hardening hardener and then provided with a conductive coating, as a result of the shrinking of the coating from the hardening resin with adherence of the The interspace present in the novel cast resin current transformer offers the conductive parts of the current transformer a further possibility of expansion, while the conductive coating adheres to the inner wall of the hardened semolina which is a dielectrically weak interspace from the high voltage field excluding.

To explain the hiring, an exemplary embodiment of a cast resin current transformer is shown in Figures 1 and 2 in different views. The winding 2 of the current transformer, optionally already provided with connections 1, is provided with a coating 5 made of elastic, possibly compressible, material that cross-links at room temperature, -2.B, silicone rubber. The winding ends or connections 1 protrude from the cover 2} They can be used for further treatment of the winding, for example for suspension. lach heating of the body consisting of winding and coating to the pouring flow temperature of the pouring resin, e.g. 3. 130 °, a graphite or metal solution 4 is applied to the coating 5 as a conductive coating} while maintaining the temperature, the casting is carried out with (Hessharz, so that the G-iessharzkörper 5 is formed. For some time, the coating 3 shrinks from (yieasharakprpex 5. The conductive coating 4 remains adhering to the cast resin body 5, forming a gap between the coating 5. Since the conductive coating 4 is at high voltage potential, this gap is excluded from the high voltage field 2, the cast resin body encloses the core wound with the secondary winding 6.

Another embodiment is shown in FIG not the frimärwieklting of the semolina resin converter, but

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9/710/1684

• the secondary winding and with their "wound iron core in. The renewal according to the way are wrapped. Her primary conductor 11 surrounding core 12 is with the secondary winding 15 wound, which is provided with the coating 14 from lelastisöhem optionally kOrapresaiblem, material. In The coating is applied, as in the exemplary embodiment in FIG. 1, the conductive coating 15, which has earth potential here, and then poured through with semolina to create the cast resin body 16. Here, too, the silicone rubber coating 14 shrinks from the silicone rubber body 16, whereby the coating 15 showing the earth potential remains adhered inside the Öiessharia- 'body 16. The shrinkage creates a gap here as in the G-iessharastromwandler (Figures 1 and 2), which offers an additional possibility of expansion for the conductive parts of the current transformer The interior of the Griesshara body 16 penetrated by the Primttrleiter 11 is also included provided a conductive coating Xf at high voltage potential.,

3 figures ■ · '

1 claim

Claims (1)

■ ■ ' M 30622 * 19.458 . -. ■ '9/710/1684 I. Schutaansp ru ch G-iessharzstrbmv / andler, characterized in that the winding bay /, the ¹ iron core provided with it with a coating from. The material is made loose and is covered with cast resin while maintaining an interspace, the theoretical expansion coefficient of which is smaller than that of the elastic material, whereby the interspace increases after the temperature of the handle has been applied / Gieseharses on the body consisting of winding and over-eye "also heated to the handle temperature of the oil hardener and then provided with a conductive coating as a result of the shrinking of the coating from the hardening Giesharas as a result of the hardening of the coating on the latter. 4 -