SCHUNK WBL 85 Balfour Beatty, Руководство по эксплуатации и обслуживанию

Страница: 10 / 56

WBL 85-15kV
Description
Single Arm Pantograph WBL 85 Balfour Beatty
Page 10
The collectorstrip is raised up against weight and contact pressure by means of leaf
springs. As the carbon strip presses against the catenary with increasing force, it
tensions up until the spring system is arrested by an adjustable stopper.
On the pan, a monitoring valve is located which applies pressure to a pneumatic
signalhorn (located on the baseframe) – as long as the correct contact force between
carbonstrip and catenary is not reached. When the pre-set contact pressure is
achieved, the carbon strip tensions against the stopper, the monitoring valve switches
over, the horn is no longer pressured, and the signal ceases.
In addition, the following parts are located on the pan:
- Shunts for the connection between contact strip and upperframe
- 3/2 way monitoring valve
4.2.6 Parallel Guide Bar
The parallel guide bar prevents the pan head from rotating,. It holds the collector strip
in a horizontal position.
4.2.7 Air Bellow-Drive
The pneumatic bellow drive allows the pantograph to rise. It is mounted between the
base frame and the lower frame. A pneumatic line connects the bellow drive with the
valve control unit. The contact pressure as well as the raising and lowering time is
adjusted through the valve control system unit.
4.2.8 Electrical Equipment
All bearing locations are by-passed by shunt connectors. These prevent the current
from flowing through the bearings. The shunts are consisting of flexible copper cables
with clamped end pieces. The current connectors are greased with copper grease to
archieve good conducting properties between the shunts and the frame parts.
4.2.9 Pneumatic Control Unit
The pneumatic control unit is fitted inside a switching box which is fixed on the
baseframe.
The pneumatic control unit ensures pneumatic adjustment of the pantograph like
contactforce and raising- and loweringtime.