The photo shows the front of the Inverter Cabinet with the covers removed.
The components in the front of the group are as follows:
NOTE: All references to directions of left or right are from the operator’s perspective.
High Voltage Connections (1): This compartment contains all bus connections for the cables for the Generator and Traction Motors. Nine of the Inverter’s twelve current sensing devices are also located in this compartment. The cables from the Generator and the cables to the Traction Motors are size 777 MCM (394 mm2). All cables are connected to their respective buses with dual-bolt high-compression crimped lugs.
Retarding Grid Connections (2): This compartment, also called the Periscope, contains all bus connections for the Retarding Grid and the Grid Blower Motor. The cables to the Retarding Grid are parallel size 444 MCM (225 mm2) for the resistive grids, and size 2/0 AWG (67.4 mm2) for the Retarding Grid Blower Motor. One of the twelve current sensing devices, used for the Chopper Module and Crowbar, are also in this compartment.