HEP

(HEP) Power for heating passenger cars, usually located in a car behind the locomotive known as a HEP Car; sometimes HEP comes from a generator aboard the locomotive.
Head End Revenue ...

With HEP generator screaming, NJT F40 #4122 heads up a commuter run as it passes Conrail WPPR-13, which is switching Goldberg's Scrapyard in Perth Amboy.

Head-end power (HEP)
Electric power supplied from the prime mover of the locomotive, an auxiliary generator on the locomotive, or a car equipped with generators, used for heating, lighting, and cooling passenger cars.

head-end power or HEP: A scheme whereby the locomotive engine (rather than a separate generator) provides power to carriages. hotel power (slang, US): That power used to provide for the comfort of passengers aboard a train en-route. See "HEP" above.

A head end power system may use either the locomotive's prime mover, or it may use a separate HEP engine generator set installed at the #2 end of the locomotive. Headway Time interval between two following trains.

HEP - (Head End Power) Electricity from the locomotives Generator which is used by another locomotive, or passenger cars for heating ,cooling, and lights.
Herald - Trademark or logo on locomotives and freight cars ...

The Phase I body has a large, single grill on either side for the HEP (last grill on the long hood). The Phase II body has a partial large grill, and a smaller grill on the angled portion of the roof, with an access door underneath.

In the 1950s we had HEP - High Explosive Plastic, also known as "Squash-head ammo. It would flatten on the tank and explode, causing a concussion that flaked armor from inside.

A term used in the USA, and possibly some other countries, for the front of a train - the locomotive.
Head End Power (HEP)
RAILWAYS.

See also: Track, Point, Car, Class, Unit