Dual start control circuit for auxiliary inverters of railway vehicle

A dual start control circuit for auxiliary inverters of a railway vehicle, comprising

• two units arranged in a front cab and a rear cab, respectively, and
• an APS start train line (TL1) and an APS stop train line (TL2),
• wherein the APS start train line (TL1) and the APS stop train line (TL2) are arranged throughout a vehicle,
• each unit comprises an auxiliary inverter start switch (APSS), an APS start relay (APSSR1) and an APS stop relay (APSOR1), wherein
• the auxiliary inverter start switch (APSS) is a self-reset three-position knob switch and is provided with on-position contacts (13, 14) and off-position contacts (23, 24),
• the on-position contacts (13, 14) and the APS start relay (APSSR1) are connected in series to a train power supply,
• the off-position contacts (23, 24) and the APS stop relay (APSOR1) are connected in series to the train power supply,
• a terminal of the APS start train line (TL1) is connected to a negative pole of the train power supply via an input terminal of the APS start relay (APSSR1) and a load, and
• a terminal of the APS stop train line (TL2) is connected to a circuit between the off-position contacts (23, 24) of the auxiliary inverter start switch (APSS) and the APS stop relay (APSOR1);
• and
• normally-open contacts (APSR1-1, APSR1-2) of the APS start relay (APSR1) and normally-closed contacts (APSOR1-1, APSOR1-2) of the APS stop relay (APSOR1) are connected in series between a positive pole of the train power supply and the APS start train line (TL1), and
• a start signal interface (APS START) of an auxiliary inverter (APS) is connected to the APS start train line (TL1).