Method of safe assessment of rail circuit unrestraint and rail circuit arrangement for making the same

摘要

When employing the invented method of safe assessment of rail circuit unrestraint, the signal current (SP) being present at the rail circuit (KO) feeding end (NK) is safely assessed by a safe signal detector (BDS), whereby the signal current (SP) is generated at the remote end (VK) of the rail circuit (KO) so that an electronic switch (ES) being controlled by a signal generator (GS) in intentions of this signal in short time tempos, makes and subsequently cancels short circuit between a first remote terminal (KPV-1) of a first stretch of rails (1KP) of a track section (KU) and a second remote terminal (KPV-2) of a second stretch of rails (2KP) of the track section (KU). In a first embodiment of the rail circuit arrangement for carrying out this method of safe assessment of the rail circuit unrestraint, a first terminal (UN-1) of a power-supply unit (UN) is connected to a first terminal (BDS-1) of the safe signal detector (BDS), while a second terminal (UN-2) of the power-supply unit (UN) is connected to a second terminal (BDS-2) of the safe signal detector (BDS), whereby a third terminal (BDS-3) of the safe signal detector (BDS) is connected to a first terminal (TR-1) of an isolation transformer (TR) while a fourth terminal (BDS-4) of the safe signal detector (BDS) is connected to a second terminal (TR-2) of the isolation transformer (TR) wherein said isolation transformer (TR) third terminal (TR-3) is connected to a first feed terminal (KPN-1) of the first stretch of rails (1KP) of the track section (KU), which said isolation transformer (TR) fourth terminal (TR-4) is connected to a second feed terminal (KPN-2) of the second stretch of rails (2KP) of the track section (KU). Said first remote terminal (KPV-1) of the first stretch of rails (1KP) of the track section (KU) is connected to both a first terminal (ES-1) of the electronic switch (ES) and the first terminal (GS-2) of the signal generator (GS) while said second remote terminal (KPV-2) of the second stretch of rails (2KP) of the track section (KU) is connected to both a second terminal (ES-2) of the electronic switch (ES) and a second terminal (GS-1) of the signal generator (GS). In a second embodiment of the rail circuit arrangement for carrying out this method of safe assessment of the rail circuit unrestraint, the first terminal (KPN-1) of the first stretch of rails (1KP) of the track section (KU) while the second terminal (UN-2) of the power-supply unit (UN) is connected to the first terminal (TR-1) of the isolation transformer (TR) while said isolation transformer (TR) second terminal (TR-2) is connected to the second feed terminal (KPN-2) of the second stretch of rails (2KP) of the track section (KU), wherein said isolation transformer (TR) third terminal (TR-3) is connected to the second terminal (BDS-2) of the safe signal detector (BDS) and said isolation transformer (TR) fourth terminal (TR-4) is connected to the first terminal (BDS-1) of the safe signal (BDS). The first remote terminal (KPV-1) of the first stretch of rails (1KP) of the track section (KU) is connected to both the first terminal (ES-1) of the electronic switch (ES) and the first terminal (GS-2) of the signal generator (GS) while the second remote terminal (KPV-2) of the second stretch of rails (2KP) of the track section (KU) is connected to both the second terminal (ES-2) of the electronic switch (ES) and the second terminal (GS-1) of the signal generator (GS).