HŽ series 1161

Last updated
1161 (former 362)

Hz 1161.jpg

HŽ 1161 001 at Zagreb railway station
Type and origin
Power type Electric
Builder Zagreb Railway Works
Build date 1988 (1161 001); 1991 (1161 002)
Total produced 2
Specifications
Configuration:
   AAR B-B-B
   UIC Bo′Bo′Bo′
Gauge 4 ft 8 12 in (1,435 mm) standard gauge
Length 15,500 mm (50 ft 10 in)
Loco weight 129 short tons (117 t; 115 long tons)
Electric system/s 250 A, 25000/2 V AC, 50 Hz
Performance figures
Maximum speed 120 km/h (75 mph)
Career
Nicknames "Samanta"
Locale Croatia

The HŽ Series 1161 is an experimental electric locomotive series belonging to Croatian Railways (Croatian : hrvatske željeznice, HŽ).

Electric locomotive locomotive powered by electricity

An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or on-board energy storage such as a battery or a supercapacitor.

Croatian Railways government-owned railway company of Croatia

Croatian Railways is the national railway company of Croatia. Croatia is a member of the International Union of Railways (UIC). The UIC Country Code for Croatia is 78.

Croatian language South Slavic language

Croatian is the standardized variety of the Serbo-Croatian language used by Croats, principally in Croatia, Bosnia and Herzegovina, the Serbian province of Vojvodina, and other neighboring countries. It is the official and literary standard of Croatia and one of the official languages of the European Union. Croatian is also one of the official languages of Bosnia and Herzegovina and a recognized minority language in Serbia and neighboring countries.

Contents

Prototype

The two units of JŽ 462 (HŽ 1161) series were converted from the JŽ 362 (HŽ 1061) series. The reelectrification of the Zagreb - Rijeka line was planned, involving change from 3 kV DC to 25 kV 50 Hz AC. To keep costs down, it was planned to reuse as many parts as possible. Also, newly used parts had to be compatible with the JŽ 441 (HŽ 1141). The modified locomotive had also to comply with the technical regulations.

HŽ series 1061 class of electric locomotives

The HŽ series 1061 is a 6-axle articulated electric locomotive series that was used by Croatian Railways. In Slovenia it is known as SŽ series 362. This locomotive, built by Ansaldo-Breda, is derived from Italian FS Class E636 and was originally donated by the Italian government. It was known as JŽ series 362 in SFRJ.

Railway electrification systems using alternating current (AC) at 25 kilovolts (kV) are used worldwide, especially for high-speed rail.

The bogies were reused, the main frame was reinforced. The traction motors and pantographs had to be modified for the higher voltage.

Bogie wheeled wagon or trolley

A bogie is a chassis or framework that carries a wheelset, attached to a vehicle—a modular subassembly of wheels and axles. Bogies take various forms in various modes of transport. A bogie may remain normally attached or be quickly detachable ; it may contain a suspension within it, or be solid and in turn be suspended ; it may be mounted on a swivel, as traditionally on a railway carriage or locomotive, additionally jointed and sprung, or held in place by other means.

Newly used parts included: the main transformer, new direction switch, new electrical amplifier, new air compressor and some parts of the pneumatic devices.

Transformer electrical artefact that transfers energy through electromagnetic induction

A transformer is a static electrical device that transfers electrical energy between two or more circuits. A varying current in one coil of the transformer produces a varying magnetic flux, which, in turn, induces a varying electromotive force across a second coil wound around the same core. Electrical energy can be transferred between the two coils, without a metallic connection between the two circuits. Faraday's law of induction discovered in 1831 described the induced voltage effect in any coil due to changing magnetic flux encircled by the coil.

Amplifier electronic device that can increase the power of a signal

An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the power of a signal. It is a two-port electronic circuit that uses electric power from a power supply to increase the amplitude of a signal applied to its input terminals, producing a proportionally greater amplitude signal at its output. The amount of amplification provided by an amplifier is measured by its gain: the ratio of output voltage, current, or power to input. An amplifier is a circuit that has a power gain greater than one.

Air compressor device

An air compressor is a device that converts power into potential energy stored in pressurized air. By one of several methods, an air compressor forces more and more air into a storage tank, increasing the pressure. When tank pressure reaches its engineered upper limit, the air compressor shuts off. The compressed air, then, is held in the tank until called into use. The energy contained in the compressed air can be used for a variety of applications, utilizing the kinetic energy of the air as it is released and the tank depressurizes. When tank pressure reaches its lower limit, the air compressor turns on again and re-pressurizes the tank. An air compressor must be differentiated from a pump because it works for any gas/air, while pumps work on a liquid.

It is the first six-axle locomotive at Croatian Railways. The 1061 number was changed to 1161, in order to indicate a new subseries.

History

Testing program

On 23 March first test drive was performed. The unit was permitted into the traffic. The locomotive was further tested.

Reason for abandoning the serial production

Serial production never happened. Although Zagreb Workshop showed, that it could do the job, the real full re-electrification of Zagreb-Rijeka line has not happened yet. Croatian Railways do today rent multi-system locomotives in order to drive the whole line non-stop. A power conversion on the total line is slated to be finished soon.

Liveries

HZ 1161 (Drawing by Vice Huljev) HZ 1161 001.PNG
HŽ 1161 (Drawing by Vice Huljev)

These two locomotives had different liveries. One had the red livery, reassembling the original "ASEA" colouring, and the other one had grey livery with blue stripes. The grey with blue livery was later chosen as Croatian Railways standard company livery.

Possibilities in the future

The 1061 and subsequently 1161 have reached almost the end of their useful life. Probably, newer and more modern locomotives will be purchased to serve Zagreb-Rijeka line. Either the experience from this two prototypes will be used to modernise series 1061 to 1161, once Zagreb-Rijeka line gets consistent voltage, or this units just were a successful experiment, but performed in wrong time.

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References