ELEKTRISKT KOPPLINGSARRANGEMANG FOR ATT ALSTRA EN UTGANGSSPENNING MED FORUTBESTEMD FASVINKEL I FORHALLANDE TILL EN INGANGSSTROM

摘要

An electrical coupling arrangement suitable for connecting protective relays to the primary current transducers in an alternating current power transmission system, comprising three winding arrangements flux linked so that an a.c. input current applied to one winding arrangement provides an a.c. output voltage substantially free of d.c. transients at a second winding arrangement, the third winding arrangement including a resistance which is variable and whose value determines the phase relationship between the output voltage and the input current.