What action should be taken if Pantos fail to lower when Panto Down is pushed?

If the pantograph (Panto) fails to lower when the "Panto Down" button is engaged, the appropriate action to take is to inspect the Panto Motor MCB (Miniature Circuit Breaker) in the affected motor. This is because the MCB is responsible for protecting the electrical circuit that powers the pantograph motor. If the MCB has tripped due to an overload, short circuit, or fault in the motor, the power supply to the pantograph will be interrupted, preventing it from lowering.

By inspecting the MCB, you can determine if it has tripped and needs to be reset or if there are other underlying electrical issues that need addressing. This action directly targets the potential cause of the failure to lower the pantograph, ensuring that any electrical faults are identified and rectified before attempting further operations.

The other options do not directly address the likely cause of the issue. Inspecting the train stable control may be relevant, but it does not focus on the immediate electrical problem that could be causing the pantograph failure. Continuing to operate the train without addressing the fault could lead to more significant problems down the line. Resetting the panel switches might not resolve the underlying electrical issue, especially if the MCB is