Voltage sensor for high and medium voltage use and a method of making the same

Abstract

A voltage sensor is disclosed for high and medium voltage use, wherein a voltage divider is arranged in a housing with external creepage distance enlarging ribs. To implement structures for creepage path enlargement to a sensor housing in a very effective and easy way, the voltage divider is arranged in a housing or in housing modules which is or are covered at least partly by at least one shrinking tube of insulating material such that the shrinking creepage enlarging structures are implemented at least at outer surface of the shrinking tube.

1 . A voltage sensor for high and medium voltage use, comprising:
 a voltage divider arranged in a housing or housing modules with shrinking creepage distance enlarging structures; and   the voltage divider being arranged in the housing or in housing modules which is or are covered at least partly by at least one shrinking tube of insulating material such that the shrinking creepage distance enlarging structures are implemented at least at an outer surface of the shrinking tube.   
     
     
         2 . The voltage sensor according to  claim 1 , wherein the shrinking tube is placed on the housing of the voltage divider near distal ends of the housing, at least partly over an output cable of the voltage sensor. 
     
     
         3 . The voltage sensor according to  claim 1 , wherein the voltage sensor is located within or surrounded by shielding electrodes, which are arranged inside or outside the voltage divider housing. 
     
     
         4 . The voltage sensor according to  claim 1 , wherein the voltage divider part is a cast shape and the insulation includes insulating material. 
     
     
         5 . The voltage sensor according to  claim 1 , wherein the insulating shrinking tube is a cold shrink tube of insulating cold shrinking material. 
     
     
         6 . The voltage sensor according to  claim 1 , wherein the insulating shrinking tube is a warm shrink tube of insulating warm shrinking material. 
     
     
         7 . The voltage sensor according to  claim 1 , configured for indoor use. 
     
     
         8 . The voltage sensor according to  claim 1 , configured for outdoor use. 
     
     
         9 . A method for producing a voltage sensor, comprising:
 covering a tubelike solid housing in which a voltage divider of a sensor is placed, or an output cable of the voltage divider, by a flexible tube of insulating cold shrink material with implemented rib structures, a diameter or resulting diameter of the housing or the cable being larger than an inner diameter of the flexible tube in an unextended state;   extending the flexible tube in diameter by an extension device to position it over the housing or the cable;   removing the extension device when the flexible tube is positioned over the housing or the cable; and   shrinking the flexible tube close on a surface of the housing or the cable.   
     
     
         10 . A method for producing a voltage sensor, comprising:
 covering a tubelike solid housing in which a voltage divider of a sensor is placed, or an output cable of the voltage divider, by a flexible tube of insulating warm shrink material with implemented rib structures, a diameter or resulting diameter of the housing or the cable being larger than an inner diameter of the flexible tube in an unshrunken state;   positioning the flexible tube over the housing or the cable; and   shrinking the flexible tube under heat treatment close on a surface of the housing or the cable.   
     
     
         11 . The voltage sensor according to  claim 1 , wherein the voltage divider part is a cast shape and the insulation includes epoxy or polyurethane. 
     
     
         12 . The voltage sensor according to  claim 2 , wherein the voltage sensor is located within or surrounded by shielding electrodes, which are arranged inside or outside the voltage divider housing. 
     
     
         13 . The voltage sensor according to  claim 12 , wherein the voltage divider part is a cast shape and the insulation includes insulating material. 
     
     
         14 . The voltage sensor according to  claim 13 , wherein the insulating shrinking tube is a cold shrink tube of insulating cold shrinking material. 
     
     
         15 . The voltage sensor according to  claim 13 , wherein the insulating shrinking tube is a warm shrink tube of insulating warm shrinking material. 
     
     
         16 . The voltage sensor according to  claim 15 , configured for indoor use. 
     
     
         17 . The voltage sensor according to  claim 16 , configured for outdoor use.