The inverter is designed to transfer the excess power from the contact network DC to supply network AC on traction substations main railways and to provide electrical braking of electric locomotives on mountain slopes.

Products include:

  • Inverters for railway DC traction substations
  • Inverter I-PTP-M-1.6k-3.8k-2-U3

Design features

Forced air cools thyristors by a cooling system based on heat pipes. Chilled air is circulated by fans on the roof of each cabin. The inverter power busbar is made of copper. Connection to the power thyristor bus is performed by special flexible dampers, in order to compensate for thermal expansion due to heating bus and eliminate mechanical stress in the structure. The control system is provided in a separate cabin.

Inversion circuits

The inverter is made by 6-pulse inverter circuit current in two versions:

  1. 1. "Bridge"
  2. 2. "Star with two reverse smoothing reactor"

Thyristors are pulse shaper in a single turn of cable-transformer transmission. Each thyristor has a diagnostic scheme conductivity. Diagnosis is based on the measurement of the thyristor voltage value on it during periods of impulse control. Information on each thyristor conduction through fiber optic transmitted to microprocessor control system. The measurement of current and voltage sensors is based on the Hall Effect. The microprocessor-based control of the controller output and the attendant console ESTEL with LCD monitor.