SBB Ee 922

Updated: August 2026 – A compact electric locomotive moving individual wagons, no coupling rods on the wheels, and a three-digit number on the side: the SBB Ee 922 shows how the Swiss classification system has changed. The letters stayed, the fraction went. This page explains what that means for identification in the field.

What is the SBB Ee 922?

The Ee 922 of the Swiss Federal Railways is a modern electric shunting locomotive. It does the work that never appears on any timetable: reshuffling wagons, assembling train portions, delivering and collecting vehicles. Operationally, it’s the direct successor generation to the vehicles that the SBB Ee 3/3 represented in Switzerland for decades.

The designation still follows the classic Swiss principle: the first, capital E places the vehicle among the shunting locomotives, the lower-case e names the electric traction. What’s new is only what comes after – a three-digit series number instead of a fraction.

For observation, that’s a small change with a big effect. Anyone used to reading the axle count straight off a designation like 3/3 gets no technical information handed to them with the 922. Conversely, the most informative part remains: the two letters still tell you at a glance that this is an electrically powered shunting locomotive, not a main-line machine.

Ee 922: the designation and the new numbering logic

Sign	Meaning	Visible feature
E (capital)	shunting locomotive	compact body, no main-line train on the hook
e (lower-case)	electric traction	pantograph on the roof
922	series number	marking on the side wall, no axle count
85 (before it)	Switzerland country code	part of the twelve-digit European vehicle number

The most important difference from the classic system: the 922 says nothing about axles. It’s a pure series number. Anyone used to reading the axle ratio off a fraction has to adjust here – on modern vehicles, the number gives you the series, not the technology.

How the twelve-digit European vehicle number is structured overall, and what the check digit is for, is explained in the article on the UIC number and its check digit.

From the fraction to the three-digit number

The classic Swiss fraction is a neat piece of engineering logic: numerator equals powered axles, denominator equals total axles. An Ee 3/3 has three powered out of three axles, a Re 4/4 four out of four, a GTW 2/6 two out of six. Roman numerals after it mark successive production series.

With modern vehicles, this principle hits its limits. Articulated units, multi-system vehicles and dual-mode drives can no longer be usefully described with an axle figure, and for scheduling and maintenance, a unique series number is more practical. That’s why newer series carry three-digit numbers – but the letters in front were kept, because they carry the real information about vehicle category and traction.

The number range gives useful orientation: the 400s for electric main-line locomotives, the 500s for multiple units, the 800s for diesel and dual-mode vehicles in shunting and engineering service, the 900s for electric shunting vehicles. Vehicles like the SBB Em 840 or the SBB Am 843 can be roughly classified this way even before you look closely.

Quick check: which Swiss shunting locomotive is that?

Where shunting locomotives work – and where you’re allowed to stand

The most important sentence first: shunting facilities, track fields, storage sidings and operational railway land are closed off. Vehicles there move slowly, often pushed, with no timetable and no advance warning. These areas belong to the operational railway land of SBB Infrastruktur and aren’t public space. There’s no situation in which entering would be acceptable.

Location	View of shunting vehicles	Note
Platforms at larger stations	medium to good	Transfer runs are often visible
Public bridges over railway facilities	good	An overview from a safe distance
Public paths alongside the line	medium	View often limited, but permitted
Marshalling yards and track fields	–	Operational railway land, access prohibited
Depots and workshops	–	Private property, no access

How to observe and document shunting operations from a permitted distance is covered in the guide to marshalling yard spotting.

Photographing and documenting

Shunting locomotives are photographically underrated. They rarely stand in the open, move slowly, and are often obscured by wagons – but their slow runs and frequent stops give you unusually generous time to compose a clean shot.

• A low camera position makes short vehicles look sturdier rather than squat.
• Include the surroundings. A shunting locomotive in its working environment tells you more than an isolated portrait.
• Photograph the markings separately. The designation and running number on compact locomotives are small and often poorly placed.
• Only from accessible locations. No shot justifies entering operational railway land.

How to keep such log entries usable in the long run is described in the guide to the sighting logbook.

Common mix-ups

Conclusion

The Ee 922 represents the transition in the Swiss classification system: the letters stayed because they carry the most important information – vehicle category and type of traction. The fraction gave way to a series number because modern vehicles can no longer be usefully described by their axle ratio. For identification in the field, that changes little: read the letters, check the body style, note the running number.