SCHUNK WBL 85 Balfour Beatty, Руководство по эксплуатации и обслуживанию

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The main components of the valve control unit are:
- Airfilter with condensate seperator
- Pressure regulation valve
- Throttle valve
- Security valve
There is also a pneumatic conduction for the latch, which is leading through the
switchingbox.
4.2.11 Compressed Air Chamber
A compressed air chamber is integrated into the pneumatic feed to the signalhorn,
forming a pressure air reservoir, ensuring that – in the event of a fall in air pressure in
the feed to the signal horn (when the pantograph is lowered or when a loss of air
pressure occurs in the feed as a result of a fault) – sufficient air volume is still
available to enable the signal horn to sound for the appropriate duration.
4.2.12 Compressed Air Signal Horn
A signal horn is attached to the baseframe. The horn sounds during the raising and
lowering operations and when there is too little contact pressure onto the catenary. As
soon as the pantograph has reached the required contact pressure for correct
earthing function, the acoustic signal ends. A monitoring valve on the pan controls the
signal horn operation.
4.2.13 Latch
The latch ensures, that the pantograph is secured in restingposition, when it is out of
service. The pneumatic circuit inside the vehicle is layed out in a way, that the latch
opens before the the airbellow get under pneumatic-pressure for raising the
pantograph.
WBL 85-15kV
Description
Single Arm Pantograph WBL 85 Balfour Beatty
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