With a total weight of 40 tonnes, this ModuTrac locomotive is designed with a central cab and is currently the heaviest twin-axle locomotive Schalke manufactures. Each wheelset is driven by a 135-kW AC electric traction motor. Two state-of-the-art liquid-cooled IGBT-controlled traction converters make it possible to control each wheelset individually. The locomotive is designed with a hybrid power supply system, featuring a pantograph for overhead catenary and Powerpacks for diesel or battery operation. The Powerpacks can be quickly and smoothly replaced in approximately one hour as required. This ModuTrac locomotive is therefore equipped with several state-of-the-art traction technology systems simultaneously.

Furthermore, the locomotive features numerous characteristics typical for Schalke products that keep operating and maintenance costs low. These include the electro-dynamic main brake, which is powered by the traction converter and strong enough to bring the entire train to a standstill if required. In cases of emergency or for prolonged parking, the locomotive is equipped with a pneumatic service brake, which includes a spring-loaded function. Moreover, a highly efficient slip and slide protection system is used, ensuring the optimal use of available tractive forces, depending, of course, on the wheel-rail friction coefficient.

State-of-the-art AC traction technology ensures reduced maintenance costs and standstill period compared with DC systems. A train protection system for outstanding operating safety and a train automation system for driverless operation are also optionally available.

In use at the Grasberg and Esmeralda mines
These ModuTrac locomotives are in use in PT Freeport’s Grasberg underground mine in Indonesia. In one of the world’s largest copper mines and simultaneously the world’s currently largest gold mine, they transport all of the extracted material in a driverless, around the clock, fully automated system. The predecessors of these locomotives still operate in the Andes mountains of Chile. They also work underground in the Esmeralda mine, which is part of the El Teniente mining complex operated by Codelco.

Modular Multi System Production Locomotive
  • Hybrid energy supply: pantograph and powerpacks (diesel or battery)
  • Fast switching from diesel powerpack to battery powerpack and vice versa
  • Central driver‘s cab for a good view in both directions
  • Capable of bringing unbraked train capacity of up to 700 tonnes to a standstill
  • Designed for fully automatic, driverless, round-the-clock use

Power Modules: Diesel powerpack, battery powerpack, pantograph

Power Transmission: AC

Weight: 40 t

Axle Arrangement: Bo

Track Gauge: 1,435 mm

Power: 270 kW

Length: 8,000 mm

Width: 3,000 mm

Height: 3,650 mm

Maximum Speed: 25 km/h

Tractive Effort: 98 kN (at μ = 0.21)

Transport Capacity: Fully loaded train: 708 t
Comprising one locomotive and 11 mining cars of 20 m3



This locomotive is designed with an end cab and has a total weight of 108 tonnes, distributed over four axles. Each wheelset is driven by a 225-kW AC traction motor and can be individually controlled, thanks to state-of-the-art, liquid-cooled, IGBT-controlled traction converter technology. The power can be supplied by various hybrid options, including a vertical pantograph for overhead catenary operation and also a horizontal pantograph for side catenary operation. The locomotive is additionally equipped with battery powerpacks, enabling it to operate without an external power supply. This locomotive is equipped with an impressive range of the latest modular traction technology.

In typical Schalke style, the engineering and the carefully selected components keep running and maintenance costs to an absolute minimum. The wear free, electro-dynamic main brake is capable of bringing the entire train to a standstill, for example 1,500 tonnes of unbraked train capacity can be brought from 25 km/h to a complete halt. The electro-dynamic traction technology enables the locomotive to halt briefly or stop and start on ascending slopes without a problem. The pneumatic service brake is equipped with a spring loaded function and only designed for use in emergencies or for prolonged parking.

Further features of this locomotive are its highly efficient slip and slide protection system and its state-of-the-art AC traction technology, which also ensures reduced maintenance and downtime costs. The locomotive can be divided into four separate modules to facilitate transportation and assembly underground. A train protection system for outstanding operating safety and a train automation system for driverless operation are also optionally available.

In use in Kiruna
The Kiruna mine is the largest underground iron ore mine in the world and operated by the Swedish state owned company LKAB. Schalke locomotives operate on a new main level at a depth of 1,365 metres fully automatically, driverless and around the clock, 365 days a year, day and night.

Multi System Production Locomotive
  • Hybrid power supply: overhead pantograph, side pantograph and battery powerpack
  • Locomotive can be divided into four modules for underground transportation to its final point of assembly
  • Capable of bringing unbraked train capacity of up to 1,500 tonnes to a standstill
  • Designed for fully automatic, driverless, round-the-clock use

Power Modules: Battery powerpack, pantograph (overhead), pantograph (side)

Power Transmission: AC

Weight: 108 t

Axle Arrangement: Bo'Bo'

Track Gauge: 1,435 mm

Power: 900 kW

Length: 11,300 mm

Width: 3,050 mm

Height: 3,400 mm

Maximum Speed: 25 km/h

Tractive Effort: 223 kN (at μ = 0.21)

Transport Capacity: Fully loaded train: 1,608 t
Comprising one locomotive and 21 mining cars of 17 m3



Using a modular system, this small ModuTrac locomotive was developed by Schalke as a new standard vehicle and enlarges the company’s portfolio for mining vehicles to include a model that features a comparatively low total weight. It is ideal for use as a production locomotive in smaller mines with lower capacities, but can also be practical for use in larger scale mines, for example as a service vehicle. Although its design is fundamentally simple, the technology used in it is still of excellent quality and the locomotive itself is extremely robust and long lasting.

This ModuTrac locomotive is highly flexible and modularly designed to make it suitable for as many locations and applications as possible. For example, various distances between axles can be selected. Customers can choose from gauge widths between 700 and 1,435 mm. Weights vary between 10 and 18 tonnes. The types and heights of the couplings are just as variably selectable and can be precisely ordered to suit on-site requirements. The power system of the ModuTrac is also extremely variable and offers a choice of traction batteries with up to 300 Ah capacity that provide sufficient power for an entire shift, but also a diesel generator unit with up to 150 kW of power output and a pantograph for straightforward electrical operation via overhead catenary.

In addition to the typical Schalke qualities, such as long lasting robustness, a great feature of this locomotive is its nimble ability to negotiate even the tightest of curves with radii as small as 17 metres. Furthermore, this ModuTrac locomotive can also be manufactured in a special ATEX-approved version for coal mines.

This new type of ModuTrac locomotive has a number of predecessors on which the new design is based. Due to their durability, many of these are still in operation today and their references include mines in countries such as Germany, Slovenia and Japan.

Modular Production and Service Locomotive
  • Wide range of applications: designed for use as both production and service locomotives
  • Simple but robust with technically outstanding design
  • Modular design with various track gauges, weights, couplings,   etc.
  • Various power units available: Battery powerpack, diesel powerpack or electrically powered via overhead catenary

Power Modules: Diesel powerpack (150 kW), battery powerpack (300 Ah), pantograph

Power Transmission: AC

Weight: 10-18 t

Axle Arrangement: Bo

Track Gauge: 700-1,435 mm

Power: 100 kW

Length: 6,660 mm

Width: 1,150-1,600 mm

Height: 1,800 mm

Maximum Speed: 15 km/h

Tractive Effort: 20,0-35,0 kN (at μ = 0.2)

Transport Capacity: Fully loaded train: 150 t



This four-axle locomotive with reduced loading gauge has an unladen weight of between 48 and 64 tonnes and is an extremely versatile, reliable working vehicle. Developed for the operators and service companies of underground and urban rail services, this traction vehicle is very useful for duties such as constructing or maintaining infrastructure.

Due to its modular design, its traction technology and modules can be combined in a variety of ways to suit the requirements of the customer. The locomotive can be supplied with the required power via a number of different modules: a Diesel powerpack, battery powerpack, a pantograph for catenary operation or a third rail are all available and can be either combined with one another or simply used alternately. Thus the locomotive can be easily optimised to suit the intended purpose, for example by switching to environmentally friendly battery operation when working in or near residential areas. The ModuTrac design makes Schalke locomotives particularly economical and well equipped for the future, since any new power source technologies that emerge can also be simply integrated as new modules in the existing set-up. Other features also make this ModuTrac Locomotive highly versatile; such as the specially developed bogies, which can cover all known track gauges from 914 to 1,676 mm. The extremely narrow loading gauge and the low axle load between 12 and 16 tonnes makes the vehicle suitable for use in practically all tram and underground subway networks throughout the world. This narrow-gauge locomotive reaches a maximum speed of 60 km/h and is a highly efficient workhorse that is suitable for a wide range of service tasks.

Modular Multi System Service and Shunting Locomotive
  • Locomotive with narrow loading gauge, reduced axle loads and various track gauges
  • Modular platform concept with regard to power supply and modular locomotive lay outs
  • AC traction technology for use with a wide variety of power supply modules (electricity, battery and diesel traction)

Power Modules: Diesel powerpack, battery powerpack pantograph (third rail or overhead)

Power Transmission: AC

Weight: 48-64 t

Axle Arrangement: Bo'Bo'

Track Gauge: 914-1,676 mm

Power: 800 kW (e-traction)

Length: 15,430 mm

Width: 2,540 mm

Height: 3,550 mm

Maximum Speed: 60 km/h

Tractive Effort: up to 210 kN (at μ = 0.33)



Optimised for use in underground and urban rail networks, the 36-tonne locomotive has been designed as a lightweight that achieves an axle load of only 9 tonnes. At the same time it has a high power density and can be operated throughout an entire shift without catenary input, thanks to its battery capacity of 540 Ah.

Each of its four wheelsets is driven by a 130-kW AC traction motor that is separately being controlled via IGBT converter technology. More over, the locomotive is equipped with a highly efficient slip and slide protection system that improves traction and minimises wear on both infrastructure and wheels. Designed for dual mode operation, the locomotive is powered either by a traction battery or by a third rail current collector, which means it can be used flexibly on any route. The locomotive is also fitted with a four-quadrant controller, enabling it to brake electro-dynamically and effectively bring the entire train to a standstill as well as stop and start on ascending slopes.

Its components are easily accessible from the outside, making it particularly simple to maintain. Moreover, its central cab is ergonomically designed and provides the driver with a good all around view as well as the ability to drive in both directions. A built-in camera additionally facilitates coupling. With tractive effort of 115 kN (at μ= 0.33) and maximum speed of 50 km/h, this service locomotive is an ideal working vehicle and combines emission-free operation with outstanding reliability.

In use at Vienna Lines and Berlin Transport Companies
The five city routes of the “Wiener Linien” in Vienna convey well over 400 million people through the Austrian capital each year. The number of passengers is growing and the network is being continually enlarged. Together with Vossloh Kiepe, Schalke developed and supplied the public transport company with five electrically powered service locomotives for performing maintenance and repair work. The Schalke locomotives are also used by the Berlin public transport system.

Multi System Service Locomotive
  • Specially designed for tram and suburban light rail networks
  • Lightweight construction
  • Powered either by battery or third rail current collector
  • Electro-dynamic brake for wear-free stopping and starting on ascending slopes

Power Modules: Battery powerpack, pantograph (third rail)

Power Transmission: AC

Weight: 36 t

Axle Arrangement: Bo'Bo'

Track Gauge: 1,435 mm

Power: 520 kW

Length: 15,120 mm

Width: 2,358 mm

Height: 3,487 mm

Maximum Speed: 50 km/h

Tractive Effort: 115 kN (at μ = 0.33)



Efficient logistical processes and the smooth distribution of goods in industry, freight depots and ports as well as compliance with the latest environmental standards are fundamental requirements for today’s rolling stock fleet operators. Robust, reliable locomotives are called for, capable of continuous operation on a wide range of assignments. At the same time they need to be flexible and designed to meet the needs of the future, which means firstly being able to comply with increasingly restrictive requirements and secondly being equipped to handle new technological developments.

With these points in mind, Schalke has developed a specially adapted locomotive concept. The ModuTrac locomotive is modularly designed and equipped with quickly exchangeable power modules, enabling it to switch from one mode of traction to another, from diesel to battery operation for example. This ability makes the locomotive extremely flexible to use and means it can also be operated with the technologies of the future. The modular design is made possible by state-of-the-art inverter technology. The ModuTrac locomotive can be manufactured either as a compact two-axle unit approximately 8 metres long or as a 17 metre, high performance, four-axle version with correspondingly greater traction capability. With tractive effort between 150 and 390 kN and a maximum speed of 60 km/h, this locomotive provides the right solution for every purpose. Its ergonomically designed cab provides a good all-round view and can be optionally fitted with a camera to ease coupling procedures.

  • Robust, modular design
  • Various traction concepts available
  • Future proven through exchangeable modules
  • Designed for maximum efficiency and reliability
  • Optional accessories such as radio remote control, train radio communication or air conditioning

Power Modules: Diesel powerpack, battery powerpack

Power Transmission: AC

Weight: 40-45 t/ 80-90 t

Axle Arrangement: Bo/Bo'Bo'

Track Gauge: 1,000-1,600 mm

Power: 390 / 1,800 kW

Length: 8,000 / 17,000 mm

Width: 3,000 mm

Height: 4,250 mm

Maximum Speed: 50 / 60 km/h

Tractive Effort: 150 / 390 kN (at μ = 0.33)


GMF 4/4 287

Schalke developed the four-axle GMF 4/4 287 diesel-electric locomotive especially for the needs of the “Infrastructure” department of Switzerland’s Rhaetian Railway. Its design fulfils a broad range of basic requirements for special circumstances, as the railway has a narrow loading gauge (tunnel gauge) and a low axle load of 16 tonnes. The narrow, metre-gauge track gauge includes small curve radii as tight as 40 metres. The locomotive is particularly suitable for high-altitude areas with steep slopes of 70‰ as an adhesion railway. Moreover, it is reliable under extreme climatic conditions: its application range stretches from temperatures of -35 °C to +40 °C and it even runs on fine, crystalline snow.
The implementation of these technical challenges has been combined with the integration of numerous specific components. For example, the locomotive is fitted with four different types of brake system, possesses the ability to run in multiple unit operation of up to three locomotives and is capable of a maximum speed of 100 km/h.
The official operating authorisation granted by the Swiss Federal Office of Transport (Schweizer Bundesamt für Verkehr - BAV) also makes this diesel locomotive unique on the market. Its main duties comprise the transportation of heavy construction trains or special-purpose trains, even if the catenary wire is switched off, the operation of snow blowers in the winter, the rescue of trains that have broken down and shunting in various districts.
In use by Rhaetian Railway
Rhaetian Railway operates locomotives on spectacular routes, some of which are under UNESCO World Heritage protection. The routes feature very tight curve radii and extremely steep ascents and descents.
  • High power density with 1,800 kW, low axle load and small loading gauge
  • Designed to withstand extreme conditions such as cold and steep gradients
  • Newly developed bogie for maximum speed of 100 km/h and small curve radii as tight as 40 metres
  • Integration of four different brake systems

Power Modules: Diesel engine

Power Transmission: AC

Weight: 64 t

Axle Arrangement: Bo'Bo'

Track Gauge: 1,000 mm

Power: 1,800 kW

Length: 8,000 / 17,000 mm

Width: 2,650 mm

Height: 4,250 mm

Maximum Speed: 100 km/h

Tractive Effort: 210 kN (at μ = 0.33)