Prussian 721/722 Altona to 829/830 Altona

Prussian 721/722 Altona to 829/830 Altona
Numbering:	721/722 Altona to 829/830 Altona
Number:	55
Retirement:	1932 conversion to ELT 1576 a / b - 1588 a / b
Axis formula :	Bo'1 + 1 2 '
Genre :	BCPw3 / BC3
Gauge :	1435 mm ( standard gauge )
Length over coupling:	29,650 mm
Bogie axle base:	2,500 mm
Wheel set mass :	14,350 kg
Top speed:	50 km / h
Wheel diameter:	1,000 mm
Power system :	6 kV ~ 25 Hz
Power transmission:	Overhead line
Number of traction motors:	2
Brake:	Westinghouse air brake
Coupling type:	Screw coupling
Classes :	2nd and 3rd

The railcars of the 721/722 Altona to 829/830 Altona series were electric multiple units of the Hamburg-Altona urban and suburban railway . They were the third series for the Hamburg S-Bahn and essentially corresponded to their predecessors, the Prussian 671/672 Altona to 719/720 Altona . As vehicles with the earliest commissioning in 1910, they received their three-part serial number. They were produced mechanically and electrically by different manufacturers and showed a number of small changes between them. In 1925, 13 vehicles of the series were reconstructed and were given the designation 1576 a / b to 1588 a / b . The railcars were in service until 1943, and one example has been preserved in the rebuilt condition.

history

From this third series, the first lot with 25 quarter trains was delivered in 1910. A further reorder of 30 units followed in 1912/1913 in order to be able to serve the constantly growing network of the Hamburg S-Bahn. Thus 140 quarter trains were in service in the period up to the First World War . The railcars ran either as individual quarter trains or in a group of up to four quarter trains.

The vehicles can be subdivided into four different series based on different deliveries, which are listed in the table.

Company number	Commissioning	Manufacturer mech.	Manufacturer el.	Hourly output	Service mass	Type of drive motors	Gear ratio	Seats	Classes
721 / 722-753 / 754	1910	LHW Van der Zypen & Charlier	AEG	275 kW	63,220 kg	Winter Eichberg	1: 3.05	130	2nd / 3rd
755 / 756-769 / 770	1910	LHW Van der Zypen & Charlier	SSW	221 kW	62,100 kg	Series motor	1: 3.64	130	2nd / 3rd
771 / 772-799 / 800	1910	LHW Van der Zypen & Charlier	AEG	275 kW	64,000 kg	Winter Eichberg	1: 3.05	130	2nd / 3rd
801 / 802-829 / 830	1910	LHW Van der Zypen & Charlier	SSW	221 kW	64,000 kg	Series motor	1: 3.64	130	2nd / 3rd

The AEG vehicles had an hourly output that was 50 kW higher. So that the weaker vehicles from Siemens-Schuckertwerke could provide the same effective performance, the gear ratio was changed. The vehicles had proven themselves in operation. They were designed for a service life of seven to eight years, in practice the original version was in use until 1925. A total of 13 of the 55 delivered railcars were equipped with reinforced electrical equipment and were given the new designations 1576 a / b to 1588 a / b with the following technical data:

DRG 1576 a / b to 1588 a / b
Numbering:	1576 a / b - 1588 a / b
Number:	13
Manufacturer:	Main workshop of the Hamburg-Altona urban and suburban railway
Year of construction (s):	1925
Retirement:	-1943
Axis formula :	Bo'1 + 1 2 '
Genre :	BCPw3 / BC3
Gauge :	1435 mm ( standard gauge )
Length over buffers:	29,650 mm
Bogie axle base:	2,500 mm
Service mass:	71,100 kg
Wheel set mass :	16,300 kg
Top speed:	60 km / h
Hourly output :	300 kW
Continuous output :	235 kW
Starting tractive effort:	67 kN
Driving wheel diameter:	1000 mm
Impeller diameter:	1000 mm
Power system :	6 kV ~ 25 Hz
Power transmission:	Overhead line
Number of traction motors:	2
Drive:	Pawbearing drive
Brake:	Westinghouse air brake
Seats:	124
Classes :	2nd / 3rd

Since the vehicles were run down due to insufficient maintenance after the First World War, new traction vehicles had to be purchased from 1924. These were the elT 1589a / b to 1645a / b , which had a barrel roof .

construction

Compared to its predecessors, the 671/672 Altona to 719/720 Altona , the mechanical part had no changes in terms of dimensions and design. The structural revision concerned some details of the car body design. The passenger compartments were divided differently.

The electrical equipment of the AEG wagons corresponded to the previous version. The pantographs of the SSW wagons were designed as scissor pantographs with an isolated compressed air drive. They had eight-pole series motors in a pin- bearing design with resistor connectors between the commutator and the armature .

Whereabouts

After the commissioning of the first railcars with steel car bodies, most of the cars built between 1910 and 1912 were converted into pure passenger cars. Among these was the unit with the numbers 627 + 5127 (according to the 1924 redrawing plan), which remained on the territory of the later GDR after World War II. Around 1960 the wagons were converted by the Deutsche Reichsbahn for the relief train in Aue (Saxony) and were given the designations 852-311 (energy supply car) and 852-312 (stay car). In 1987, members of the Traffic Amateurs and Museum Railroad Association discovered the double car in Karl-Marx-Stadt , and were able to buy it from the Reichsbahn the following year and transfer it to the Aumühle Museum. The unit is stored in an unrestored condition, a later refurbishment is sought. Another unit is said to have remained in Brno after the Second World War .

See also

• List of Prussian locomotives and railcars

literature

• Rainer Zschech: Railcar archive . Transpress VEB publishing house for transport, Berlin 1970.
• Brian Rampp: Berlin city, ring and suburban railways . In: Eisenbahn-Journal Archiv 1/97 . Volume No. 10 Prussia Report, 1997, ISBN 3-89610-005-X .

Individual evidence

1. ↑ ^{a b c} Rainer Zschech: Railcar archive . Transpress VEB Verlag for Transport, Berlin 1970, p. 337 ff .
2. ↑ suburban railway 803/804. Association of Traffic Amateurs and Museum Railways, accessed on July 10, 2016 . 
3. ↑ Dieter Bäzold, Brian Rampp, Christian Tietze: Electric Railcar German railways . alba Verlag, Düsseldorf 1997, ISBN 3-87094-169-3 , p. 96 .