On which car of a married pair is the inverter located in M-3 trains?

The inverter in M-3 trains is located on the A car of a married pair. This is significant because the inverter is responsible for converting DC power into AC power, which is essential for operating various electrical components on the train, including lighting and HVAC systems. Placing the inverter on the A car ensures that the critical electrical equipment is housed in the front of the married pair, where it can efficiently distribute power to the rest of the train. Additionally, this location helps in balancing weight and optimizing the overall design and functionality of the train. Understanding the position of the inverter is crucial for troubleshooting and maintenance tasks, ensuring that train operations remain smooth and efficient.