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TE33A

The TE33A (ТЭ33А) is a heavy freight diesel-electric developed by Systems as part of the Evolution Series, designed specifically for 1,520 mm railways and based on the ES44ACi model with a Co’Co’ arrangement. It features a 12-cylinder GEVO-12 engine producing 4,500 horsepower (3,360 kW), a maximum speed of 120 km/h, and a total weight of 138 tonnes, enabling it to replace older Soviet-era locomotives like the 2TE10 in demanding heavy-haul operations. Production of the TE33A began in 2008 at GE's facility, with additional assembly in , , and over 500 units had been produced as of 2025, primarily for Kazakhstan Temir Zholy (KTZ), the national railway of , including recent large orders such as 300 more TE33AT in September 2025. The locomotive has seen adoption across several (CIS) countries, including , , , , , , and , where it supports key exports such as , corn, and by enhancing network capacity and reliability. In , under a 2018 agreement with Ukrzaliznytsia (UZ), 30 TE33AC variants—featuring dual controls and a two-tone livery—were ordered, with an additional 40 ordered in 2020; the first unit, TE33AS-2001 nicknamed "Trident" (Tryzub) after Ukraine's , entered revenue service on December 13, 2018. Notable for its environmental compliance, the TE33A is certified to UIC IIIa emissions standards, reducing particulate emissions by approximately 75% and emissions by 35% per kWh compared to the 2TE10, while offering lower lifecycle costs through advanced traction motors and high productivity. Variants include the TEP33A passenger version, with a top speed of 160 km/h and 110 units ordered for KTZ (all delivered by 2025), and a demonstration unit (TE33A-9999) tested on Poland's line in 2015. Overall, the TE33A represents a modern evolution in railroading, prioritizing efficiency, power, and reduced environmental impact for regional freight and passenger needs.

Development and Production

Origins and Initial Development

The TE33A locomotive was developed by Systems as part of its Evolution Series, specifically adapted for 1,520 mm railways in the post-Soviet to address the need for modernizing aging fleets like the TE10. Development began in response to market demands in and , with initial design work focusing on compatibility with regional infrastructure and adherence to Russian standards for safety and operations. The project aimed to deliver improved , reduced emissions, and lower lifecycle costs compared to predecessors, while ensuring seamless integration into existing 1,520 mm networks. In September 2006, Kazakhstan Temir Zholy (KTZ) placed a US$650 million order for 310 Evolution Series locomotives, marking the inception of the TE33A program tailored for the 1,520 mm gauge. This agreement included provisions to enable local assembly and production in , emphasizing environmental compliance such as EU IIIa emissions standards to reduce by approximately 75% and by 35% over older models. The core technology drew briefly from the GEVO-12 engine platform, prioritizing gains of up to 17% through optimized and . To facilitate localization, and KTZ formed a in February 2008 for a $125 million assembly plant in , with construction targeted for completion by mid-2009 to support GOST-compliant manufacturing and . The first units, TE33A-0001 to 0010, were built at GE's facility between October and December 2008, arriving in in January 2009 for initial testing focused on emissions, efficiency, and infrastructure compatibility. The plant, known as Lokomotiv Kurastyru Zauyty (LKZ), officially opened on July 3, 2009, with GE investment enabling the rollout of the initial 10 imported units for KTZ service later that year. These early milestones established the TE33A as a key replacement for the TE10, emphasizing reduced operational costs and environmental standards across 1,520 mm operators.

Manufacturing and Assembly

The initial batch of 10 TE33A locomotives was fully assembled at General Electric's manufacturing facility in , in late 2008, marking the transition from the standard design adapted for 1520 mm gauge railways. Following this, production shifted to local assembly at the Lokomotiv Kurastyru Zauyty (LKZ) plant in , , a of Kazakhstan Temir Zholy (KTZ), under a partnership established with starting in 2010 to localize manufacturing and reduce import dependency. The facility, with an annual production capacity of up to 100 units, began operations with kit assembly from U.S.-sourced components, evolving toward greater localization through agreements. By 2012, the production process had advanced to include on-site engine manufacturing at a dedicated $90 million diesel engine plant in Astana, jointly developed by GE and KTZ, enabling the integration of key components like the 12-cylinder GEVO-12 prime mover during assembly. This shift supported full local manufacturing capabilities, with Kazakh workforce training programs conducted by GE specialists to handle welding, electrical integration, and final assembly stages, resulting in over 500 TE33A units produced cumulatively as of late 2024, with production continuing into 2025. In 2019, GE Transportation was acquired by Wabtec Corporation, which has continued production at LKZ and took full ownership of the plant in 2024; recent contracts, including a 2024 order for over 70 units and a 2025 agreement for 300 more TE33AT variants, leverage this localized model. Local content in the locomotives increased progressively, reaching approximately 50% by 2015 through domestic sourcing of components such as bogies and control systems, and exceeding 70% by the early 2020s via expanded supplier networks in Kazakhstan. Quality control during assembly incorporates rigorous protocols, including dynamic testing on dedicated test tracks to verify stopping performance under loaded conditions, emissions to meet EU IIIA standards for reduced and , and integration testing of the AC traction systems to ensure seamless power delivery from the to the six GE GES70AC traction motors. These procedures, aligned with international rail standards, involve multi-stage inspections at LKZ, from subassembly verification to full-load runs prior to and delivery.

Design and Specifications

Engine and Powertrain

The TE33A locomotive is equipped with a GEVO-12 four-stroke, 12-cylinder turbocharged , delivering 4,500 horsepower (3,360 kW) at 1,050 rpm. This features electronic , a of 16.5:1, and a bore and stroke of 9.8 by 12.6 inches, enabling optimized for reliable performance in harsh operating conditions. The incorporates microprocessor-based systems for precise of delivery and parameters, contributing to overall . The employs a diesel-electric configuration with an , converting from into electrical power for . Six asynchronous traction motors, one per , provide the motive force, with the system supporting the Co-Co for enhanced . This setup utilizes axial regulation to improve wheel-rail and traction force. Idle consumption is reduced to about 8.8 kg/h. The locomotive's has a standard capacity of 6,500 liters, expandable to 9,000 liters for extended operations. Emissions compliance is met through adherence to EU Stage IIIA (UIC IIIA) standards, incorporating technology to lower by up to 35% and by 75% compared to older designs. The modular engine design facilitates quick component swaps, with major overhaul intervals every 92-120 days, significantly extending to 40 years while minimizing .

Structure, Dimensions, and Performance

The TE33A locomotive utilizes a , comprising two three-axle bogies that distribute load evenly for heavy freight hauling on 1,520 mm tracks, with adaptations from the standard gauge ES44ACi model. The total weight is 138 tonnes, with the structure optimized for structural integrity under high loads and harsh environmental conditions typical of rail networks. The overall length over buffers measures 21.894 m, enabling efficient maneuvering within standard loading gauges while maintaining stability on uneven terrain. The cab design features dual cabs for versatile operation, equipped with ergonomic controls to reduce operator fatigue and integrated climate control for comfort in extreme temperatures ranging from -50°C to +50°C. incorporates energy-absorbing structures to protect during collisions. The cab is designed to meet occupational limits and support clear communication. The braking system employs electropneumatic controls combined with , achieving up to 30% adhesion for controlled deceleration of heavy trains up to 6,000 tonnes. Maximum starting reaches 534 kN, facilitating rapid pull-away from stops on grades up to 1.25%. This integration with the allows seamless transition between propulsion and modes. Key performance metrics include a top speed of 120 km/h optimized for freight services, balancing speed with and track wear. The can operate on minimum curve radii of 150 m without excessive wear. Safety features encompass an event recorder for logging operational data, to maintain traction during wet or slippery conditions, and compatibility with systems prevalent in 1520 mm networks, such as KLUB-U for speed supervision and emergency braking.

Variants

Freight Models

The TE33A (ТЭ33А) diesel-electric locomotive serves as the standard freight variant in the TE33 series, primarily employed for hauling heavy commodities such as , metals, grain, and containerized cargo on 1,520 mm broad-gauge networks. This configuration draws from the platform, featuring a baseline 12-cylinder engine adapted for the demanding conditions of post-Soviet systems, with emphasis on reliability for bulk freight operations. Key structural adaptations in the TE33A prioritize durability for intensive freight service, including a reinforced capable of supporting axle loads of 23 tonnes to handle heavier consists on upgraded tracks. The locomotive's gearing is optimized for a maximum speed of 120 km/h, delivering high starting at low speeds to facilitate of loaded s weighing up to 6,000 tons. These features enable efficient performance on undulating terrain typical of mineral-rich regions, with the overall service weight maintained at approximately 138 tons to balance stability and track compatibility. The TE33AC is a dual-control variant of the TE33A, designed for operators requiring flexibility in cab orientation, such as Ukraine's Ukrzaliznytsia, which ordered 30 units (designated TE33AS) in 2018. Traction enhancements further tailor the TE33A for freight reliability in adverse environments, incorporating an advanced sanding system to improve wheel-rail during operations in harsh climates, including temperatures as low as -50°C prevalent in Central Asian and Eastern European winters. Multiple-unit control capability allows synchronization of up to four locomotives, enabling for extended heavy-haul trains while maintaining precise and coordination across units. is emphasized for long-haul efficiency, with a standard diesel tank capacity supporting a range exceeding 1,200 km per fill, reducing refueling stops on routes spanning industrial corridors. By 2020, production of the freight-configured TE33A had reached approximately 313 units, predominantly assembled at the Lokomotiv Kurastyru Zauyty in , representing the majority of the series' output and forming a of fleet modernization efforts in the region.

Passenger Models

The TEP33A (ТЕП33А) represents the passenger variant of the TE33A series, specifically adapted for higher-speed services on Kazakhstan's rail network. Unlike the freight-focused TE33A, the TEP33A achieves a maximum speed of 160 km/h through revised gearing and modifications, enabling efficient hauling of trains on non-electrified lines. Key adaptations for operations include a softer to provide a smoother ride quality and an aerodynamic fairing to reduce at elevated speeds, alongside enhancements to the HVAC system for improved comfort during extended journeys. The utilizes the same as the base model but is tuned for sustained high-speed , with auxiliary power provisions dedicated to train lighting, , and electro-pneumatic braking systems. Operationally, the TEP33A is suited for routes of up to 800 km, incorporating advanced capabilities to recover energy and enhance efficiency on long-distance passenger runs. While sharing the core structural base with other TE33A variants—such as overall dimensions and configuration—the passenger model prioritizes velocity and ride comfort over heavy freight capacity. Production of the TEP33A commenced under license from at Kazakhstan's Lokomotiv Kurastyru Zauyty (LKZ) assembly plant in , with kits supplied from GE facilities in the United States. Kazakhstan Temir Zholy (KTZ) placed an order for 110 units in , with initial deliveries beginning in and the first locomotives entering trial passenger service on the Almaty–Aktogay route by early 2016.

Operators and Orders

Kazakhstan

Kazakhstan Temir Zholy (KTZ), the state-owned railway operator, represents the largest operator and deployer of TE33A locomotives, integrating them into both freight and passenger operations across the country's extensive 1520 mm gauge network spanning over 15,000 km. These locomotives have played a pivotal role in enhancing KTZ's capacity for domestic and transit traffic, particularly on east-west corridors connecting Central Asia to Europe and China. The deployment began with a 2006 agreement between KTZ and GE Transportation for 310 TE33A freight locomotives, comprising 10 units built at GE's Erie, Pennsylvania facility and delivered to Kazakhstan in January 2009, followed by local assembly of the remaining 300 units at the Lokomotiv Kurastyru Zauyty (LKZ) plant in Astana starting in late 2009. In 2012, KTZ expanded its fleet with an order for 110 TEP33A passenger variants, signed at InnoTrans, with initial deliveries commencing in 2014 and the full complement completed by 2019. These passenger units, capable of speeds up to 160 km/h, are utilized on key intercity routes such as Almaty to Astana, supporting high-demand services amid growing passenger volumes. Freight TE33A models, meanwhile, haul heavy commodities including ore from mining regions like Karaganda on trans-Kazakhstan lines, contributing to KTZ's annual freight turnover exceeding 300 million tons. In October 2024, KTZ secured a $405 million contract with for over 70 additional TE33A freight locomotives, to be assembled at the LKZ facility with deliveries beginning in 2025 and continuing through 2027. This builds on prior expansions and underscores ongoing fleet renewal efforts. Just months later, in September 2025, KTZ awarded a record $4.2 billion agreement for 300 more Evolution Series TE33AT freight locomotives, along with 15-year service support, marking the largest locomotive contract in the company's history; deliveries are slated to start in 2027 and extend to 2036 at a rate of about 30 units annually. The TE33A series was specifically developed to succeed aging Soviet-era models like the 2TE10, enabling KTZ to modernize its traction fleet and improve operational reliability in harsh continental climates. Local production at LKZ, a with from GE/, has employed over 1,000 workers as of and increased output capacity to 120 locomotives per year. Early operational challenges, including adaptations for extreme cold, were addressed through progressive upgrades, enhancing overall performance by the mid-2010s.

Ukraine

Ukrainian Railways (Ukrzaliznytsia, UZ) initiated evaluation of the TE33A through a demonstration unit in Kyiv in September 2016, marking the first exposure of the locomotive to Ukraine's 1,520 mm gauge network for testing purposes. In February 2018, UZ signed a $1 billion framework agreement with GE Transportation for up to 225 TE33A locomotives over 15 years, with an initial firm order for 30 freight units to modernize the fleet and support industrial transport needs. Deliveries of the initial batch commenced in late 2018, with the remaining units arriving between 2019 and 2021, including 15 locomotives supplied in fall 2019 alone. The TE33A, nicknamed "" (Тризуб) in for its three-pronged on the , entered revenue service on December 13, 2018, hauling its inaugural load of 3,824 tonnes of from to . These locomotives are primarily deployed by UZ on eastern and southern lines, including routes from through industrial corridors to border crossings, transporting grain, ore, and metals to key export points in Ukraine's agricultural and heartland. The 2018 agreement envisions potential expansion to 195 additional units, with up to 40% local content in future assemblies. In April 2024, the U.S. Export-Import Bank approved $156.6 million in financing for the potential purchase of 40 additional diesel locomotives. Adapted for Ukraine's mixed freight and occasional requirements, the TE33A integrates seamlessly with UZ's existing signaling systems while offering approximately 10% savings compared to the legacy 2TE10 , enhancing efficiency on variable terrain and temperature conditions ranging from -50°C to +50°C. By early 2020, all 30 units were delivered and certified for , with the fleet fully active by 2023 despite ongoing maintenance disruptions caused by the 2022 .

Other Countries

In addition to major deployments in and , the TE33A locomotive has seen limited adoption across other former Soviet states, primarily for regional freight operations on 1520 mm networks. These deployments often involved small orders or exploratory purchases, reflecting niche applications in challenging terrains or cross-border services, though some initiatives faced delays or cancellations. Estonia's engagement with the TE33A began in 2010 when EOS, owner of Estonian Railway Services, initiated negotiations for the locomotives. In May 2013, a contract was signed for 15 units to be assembled by Kazakhstan's Lokomotiv Kurastyru Zauyty (LKZ), with deliveries anticipated that year. However, financial challenges led to the order's cancellation in 2015, resulting in no units delivered. A single TE33A prototype had been sent for testing in in December 2011, but it did not lead to operational use. Kyrgyzstan's Kyrgyz Temir Zholu ordered five TE33A freight locomotives in July 2012 from LKZ, with deliveries occurring between 2013 and 2014. These units were deployed on mountainous routes, leveraging the locomotive's traction capabilities for the country's rugged terrain. A second batch of two additional TE33As was confirmed in 2014 following successful testing, further supporting freight haulage in the region. Moldova's (CFM) placed an order for 12 TE33A locomotives in November 2018 from (now ), with major components manufactured in the United States and final assembly in . The units were delivered in 2020, enhancing CFM's fleet for cross-border freight services, funded in part by a €110 million European Bank for Reconstruction and Development loan. These locomotives have improved reliability on Moldova's international routes. In , a single US-built TE33A was supplied to the in 2009 for testing purposes. Despite expectations for further orders as of 2013, only this unit entered limited service, primarily for evaluation in freight operations, highlighting challenges in scaling adoption in the country's vast network. Russia explored TE33A acquisitions through discussions in 2013 with Yakutian Railway and Eurosib, the latter considering up to 50 units for potential freight needs. No firm orders materialized, though occasional leasing arrangements have occurred for specific operations. Tajikistan's Rohi Ohani Tojikiston ordered six TE33A locomotives in November 2011, marking the first export contract for the model from Kazakhstan's LKZ plant. Deliveries began in early 2012, with the units assigned to local freight duties on the national network. These locomotives supported Tajikistan's rail infrastructure amid its mountainous geography. Turkmenistan Railways purchased one TE33A in 2014 from LKZ, which was notably used in the of the Kazakhstan-Turkmenistan-Iran railway line. This single unit has contributed to limited freight enhancements in the country's network. (ADY) leased 10 TE33A locomotives starting in 2015 from LKZ, with the first unit handed over in August of that year. These were deployed for freight services along routes, bolstering ADY's capacity under a financing agreement with Kazakhstan's Development Bank. Across these countries, approximately 35 TE33A units have been deployed or tested, emphasizing regional freight applications with varying utilization rates—such as low operational intensity in due to testing limitations. This scattered adoption underscores the model's role in modernizing smaller 1520 mm fleets, though economic and logistical hurdles have constrained broader expansion.

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    Nov 20, 2023 · To build its freight capacity, Azerbaijan Railways entered into a lease agreement for more than 10 GE Type TE33A diesel locomotives in 2015.