Patent ID: 6549110
Filing Date: 2003-04-15
Classification: H01F

Abstract:
A compensating device usable with railway car transformers, comprising:at least one compensation receptacle having a port in fluid communication with an interior of an associated transformer housing, and having side walls and a bottom wall; a fluid volume enclosed within said receptacle; and a separating element within said receptacle limiting said fluid volume in said receptacle, said separating element being a roll-over membrane having a circumferential border sealingly connected to said side walls at a distance spaced from said bottom wall, said membrane having waves; whereby, upon modification of said fluid volume, position of said membrane is modified such that said membrane extends substantially in a plane in a rolled-up state with said waves at a distance from said bottom wall when said receptacle contains a maximum fluid volume, and such that said membrane is in a rolled-out state with flattening of said waves and with said membrane located adjacent said bottom wall when said receptacle contains a minimum fluid volume.