GTKB Kft

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For the safe and environment-friendly transportation
Our main profile is to produce railway safety appliances and railway signalling equipments. The company’s mission is to serve our customers fast and in high quality. As a responsible company our aim is to be successful with our environment-friendly and safe product range in the XXI. century – just like we have been since 1950.

AFp-424S pneumatic current collector for railway use


The AFp-424S type current collector belongs to the product group of AFp 121, 221, 321, 224 type collectors and these models are used for decades at many traction vehicles of the Hungarian State Railways (MÁV). All dimensions and technical specifications have been ndesigned according to the standards of MSZ EN 50206-1. The profile of the sliding contact fits to the standards of UIC 608. The length of the interchangeable carbon shoe is 1150 mm and it can be used under the overhead system with sinuous ways between ± 300 mm or ± 400 mm.
The collector can be operated by air spring which is driven by electro-pneumatic valves and regulators - and all the movement is operated by microcontroller. The constancy of nominal static force in the operating range of the device is set directly by a highly accurate regulator valve. The collector is set with an automatic pull-down mechanism (A.D.D.) and a force-limiting device into both directions. The same time/pressure program is loaded during these three phases: the  normal pull-down movement, the A.D.D. and the force-limiting task. Lifting up is also controlled by a software and the movement can be performed smoothly onto any overhead system in any height. Nominal static force can be adjusted by switches - according to the abraison of the coal parts or the winter weather. After any replacements of spare parts the device can be easily adjusted.


TECHNICAL DATA
Nominal voltage: 25 kV, 50Hz
Nominal current (in standing): 60 A
Nominal current (in moving): 240 A
Lenght of sliding shoe: 1950 mm (4A profil, UIC 608 D1)
Lenght of carbon insert: 1150 mm
Nominal contact force: 75 ±10 N
Max contact force: 120 N
Max operating speed: 160 km/h
Max operating pressure (input): 10 bar
Regulated pressure (in device): < 5 bar
Max lifting time: 6-8 sec
Max descent time: 3-4 sec
Total mass: 138 kg

According to UIC 505, UIC 605, UIC 606, UIC 608, MSZ EN 50206 standard.

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