Before entering Phase Break or Dead Section under double Pantograph instructions, what must be done to pantographs?

Before entering Phase Break or Dead Section under double Pantograph instructions, what must be done to pantographs?

• A. Keep Pantographs Up through PB and DS.
• B. Drop all Pantographs prior to entering PB and DS.
• C. Drop only the leading Pantograph.
• D. Stop and wait for further instructions.

Answer: (B)

All pantographs must be lowered before entering a Phase Break or Dead Section when operating under double pantograph instructions. Lowering both pantographs ensures there is no contact with the overhead wire, preventing arcing, damage to the pantographs, and unintended energization of equipment in the dead or phase-broken area. Keeping any pantograph up could strike or arc with the wire and compromise the power system as you transition into the PB/DS zone. Dropping only the leading pantograph would still leave the other pantograph in contact and at risk, so the safe standard is to drop all pantographs prior to entering PB and DS.

All pantographs must be lowered before entering a Phase Break or Dead Section when operating under double pantograph instructions. Lowering both pantographs ensures there is no contact with the overhead wire, preventing arcing, damage to the pantographs, and unintended energization of equipment in the dead or phase-broken area. Keeping any pantograph up could strike or arc with the wire and compromise the power system as you transition into the PB/DS zone. Dropping only the leading pantograph would still leave the other pantograph in contact and at risk, so the safe standard is to drop all pantographs prior to entering PB and DS.