When does the driver have to lower and raise a pantograph on the run?

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When does the driver have to lower and raise a pantograph on the run?

June 22, 2019, 1:29 PM

Normally, pantographs do not have to be lowered and raised on the run. The principal exception is the case of the AC-DC switchover by the WCAM series locos as described above. Other than that, there are a few points where the catenary has a gap (no cable physically present, not even a neutral or dead section), for instance at level crossings where there is provision for extra-tall road traffic, in which case the pantograph has to be lowered as the loco coasts through the gap. The catenary may also be missing for short sections above diamond crossings or complex track configurations. Also, pantographs may be lowered and raised occasionally for troubleshooting if the driver suspects a problem.

ये भी पढ़े – सिर्फ माउथफ्रेशनर से कहीं ज्यादा गुणकारी है सौंफ, जानें और बहुत से चमत्कारी गुण

In the AC sections, when the phase of the overhead cable’s power supply changes (at the ‘phase breaks’) the pantograph need not be lowered and raised at the dead zone. This happens in many places, e.g., a couple of times on the Virar-Surat, Surat-Baroda routes. Usually the driver will switch off and switch on the equipment in the loco in order to prevent transient effects from damaging the equipment.

Source – IFRCA.org

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