DIESEL ELECTRIC LOCOMOTIVECROWBAR RESISTOR

The purpose of the IPR ( Inverter Protection Resistor) is to dispose of DC link energy more gracefully in the event of a soft crowbar, firing incident. One resistor per thyristor control cabinet is required. For TCC-1, the IPR is mounted on its long hood side outside wall which is actually an inside wall for the main generator room. The cage housing IPR-1 also includes two damping resistors which are connected in parallel with the L456 DC Link reactor located in the main generator room. This function is to assist L456 in the reduction of power oscillations on the DC Link, especially in braking mode.