SZU Be 4/4
| Be 4/4 | |
|---|---|
 Be 4/4
|
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| Numbering: | 21–28 (UIC 94 85 7 556 521-3 - 528-8) |
| Number: | 8th |
| Manufacturer: | SLM / Siemens Mobility |
| Year of construction (s): | 1992 |
| Axis formula : | Bo'Bo ' |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over coupling: | 22 010 mm |
| Width: | 2800 mm |
| Trunnion Distance: | 14 810 mm |
| Bogie axle base: | 2300 mm |
| Total wheelbase: | 17 180 mm |
| Empty mass: | 43.5 t |
| Top speed: | 70 km / h |
| Hourly output : | 844 kW (4 × 211 kW) |
| Continuous output : | 584 kW (4 × 146 kW) |
| Starting tractive effort: | 130 kN |
| Driving wheel diameter: | 750/690 mm (new / worn) |
| Power system : | 1200 V = |
| Number of traction motors: | 4th |
| Coupling type: | Scharfenberg |
| Gradient: | 79 ‰ |
| Seats: | 63 |
| Standing room: | 87 |
The Be 4/4 of the Sihltal-Zürich-Uetliberg-Bahn ( SZU ) are eight railcars that have been designed for use on the Uetlibergbahn . They were manufactured in 1992 by the Swiss Locomotive and Machine Works (SLM) and Siemens (STS).
history
As a result of the relocation and connection to Zurich main station in 1990, SZU expected an increase in traffic, which also made it necessary to supplement the rolling stock of the Uetlibergbahn. The 1986 tender therefore comprised eight railcars, these being deliberately oversized in terms of performance so that a control car could later be taken along. The vehicles should cover the basic cycle on the Uetliberg and at the same time replace the BDe 4/4 . After delivery, both Be 8/8s were to be used as reinforcement trains between Zurich and Triemli.
Instead of the initially planned control car, four low-floor intermediate cars were purchased in 2003. Since then, trains have generally been running in the following formation: railcars, low-floor intermediate cars, railcars.
With the delivery of the Be 510 in 2013-14, they stepped back into the second link. It is foreseeable that it will be decommissioned, as the Uetlibergbahn is to be converted to alternating current.
Technical
The railcars are designed for 1200 volts DC voltage, with the feed being carried out via two laterally offset pantographs. They are equipped with a multiple control system that can run up to four railcars.
The drive equipment is built in three-phase technology based on the converter principle with an impressed intermediate circuit. Because of the required redundancy, the drive equipment is duplicated and each responsible for one bogie.
Torsion-soft bogies with radially adjusting axles were installed as bogies. Each axis is driven and the motor is connected to one axis via a two-stage gearbox.
The brakes are pneumatic block brakes with spring accumulators, magnetic rail brakes and electrical brakes. The electric brake can feed back, and two separately ventilated resistors are installed under the floor, which are designed for continuous operation.
literature
- Walter Steinacher, Jürgen Schlaht: The new Be 4/4 21 - 28 multiple units for the Uetlibergbahn. In: Schweizer Eisenbahn-Revue 4/1993, pages 147–164