DE/DM30AC vents

What are the big rectangular and square vents on the side of the DE/DM30AC's for? Everytime they pass I hear I sucking noise, but what are they for?

air intakes for inverter ventilation, cooling fan inlet, traction motor fans etc etc etc.

DutchRailnut wrote:air intakes for inverter ventilation, cooling fan inlet, traction motor fans etc etc etc.

What about the air for the engine? And where does the air go? Does it flow out through a seperate vent?

I believe its covered by " etc, etc, etc"
the intake air for engine is about lowest volume on list of things that need air.

lirrfan wrote:

DutchRailnut wrote:air intakes for inverter ventilation, cooling fan inlet, traction motor fans etc etc etc.

What about the air for the engine? And where does the air go? Does it flow out through a seperate vent?

The fans along the top pull all the air / exhaust out.

If you look at the top of the locomotive, there are three fans at the rear. The two fans which look similar to each other are apparently engine-cooling radiator fans. The third, large fan is probably for inverter cooling. My understanding is that inverters throw off a lot of heat.

That rear most fan is for the dynamic braking.

Behind the grills on the left hand side are a set of spin-tube filters which clean the air of particulate matter.

This air is directed to a large centrifugal blower which ventilates the following:

No. 1 Truck
electrical cabinet (right side of loco)
Inverter cabinet (left side of loco)

On the roof is a double blower which cools the main alternator and supplies draft to the spin tubes.

There are (2) engine cooling fans and another smaller centrifugal blower (which can be seen behind the intake) that ventilates the No. 2 truck.

The secondary engine air filters (baggies) are in the alternator compartment per standard EMD practice.

BS