Page 77 - booklet draft

1.SYSTEM IMPROVEMENTS (AC & TL)

A) Provision of Switch Board VPH:

Provided control wiring & switch
for control lighting in VPH.

Modification is carried out

departmentally in 34 Power cars

B) BYPASS ARRANGEMENT FOR EXTENDING SUPPLY TO OMS/RA
COACHES:
At present the power cars are being attached at the extreme
ends of the formations.
When the train is running with EOG supply from either of the power

cars or both the power cars. The supply will not be extended to the
Non-vestibule end of both Power cars (ie., the extreme ends).
Because of this, the power supply cannot be extended to the
coaches attached to the Non-vestibule end of the power cars.;
because of the following reasons:
a) The Feeder Contactors cannot be CLOSED as the coils cannot

be energized from the supply available output side of the
Feeder Contactors.
To facilitate the energization of the coil of the Feeder
Contactors; when the supply is taken from the output side,

Rotary Switches (BSW-1 & BSW-4) are provided in respective
Feeder Contactors 1 & 2 circuit.

b) The HOG Contactors cannot be CLOSED as the coils cannot be
energized from the supply available output side of the HOG
Contactors - A & B.
To facilitate the energization of the coil of the HOG Contactors;

when the supply is taken from the output side, Rotary Switches
(BSW-2 & 3, BSW-5 & 6) are provided in respective HOG