Iek УЗО, ВД1-63, 2Р, 32А, 30мА, тип А MDV11-2-032-030 [9/13] Страница 9

Содержание

iEK Figure 1 Overall and installation dimensions of 2 polar VD Figure 2 Overall and installation dimensions of 4 polar VDs Figure 3 Electric schematic diagram of 2 polar VDs Figure 4 Electric schematic diagram of 4 polar VDs 3 Complete Set 3 f Delivery package includes VD1 63typeA 1 pcs Passport 1 pcs 4 VD Operation Principle 4 1 In standard load operation mode the flow of magnetic lines created by current in phase and neutral conductors within the bridging transformer s magnetic conductor core compensate each other so the resulting magnetic flow is equal to zero The current in the secondary winding of the said transformer is absent The tongue of differential relay s magnetic system is pressed to the heelpiece and is kept in this position by the attraction of a special holding magnet It is notable that the magnet attraction strength is a little higher than that of a special spring striving to tear the tongue away from the heelpiece If the residual current appeared in the protected circuit exceeds the defined value setting when the magnetic flow created by the release winding becomes sufficient for compensating the holding magnet flow the spring will tear the tongue away from the heelpiece Through the 9

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