Pantograph
Two pantographs are provided on either end of loco. Design of pantograph is same as other AC locos. For raising and lowering of pantograph one switch ‘ZPT’ is provided on panel ‘A’ having 3 positions, UP , Off and DOWN.
When we press switch down ward (i.e. position UP) and release - panto will up.
When we press switch upward (i.e position DOWN) and release - panto will lower.
Note: The rear panto will rise automatically.
Position:
Auto - Normal position (only rear panto will raise)
I - Panto of Cab-1 will raise (2 will isolate electrically)
II - Panto of CAb-2 will raise (1 will isolate electrically)
For isolation of both panto pneumatically, there are two COCKS provided on Pn. Panel. PAN-1 & PAN-2. Normally these coc should be opened (Horizontal). For isolating particular panto keep that coc on closed position(i.e Vertical) One circuit breaker (127.12 Circuit breaker Pantograph, VCB Control) is provided for panto circuit in SB-1 cubicle.
Key IG-38 is provided on pneumatic panel to control the air pressure to Pantographs. For air passage to pantographs this key should be kept ON (horizontal)
Auxiliary Compressor (MCPA) :-The auxiliary compressor is used to raise the pantograph. While the control Ckt. Is switched ‘ON, the auxiliary compressor controlled by Pn switch start automatically (independent of MCE) till the pressure reaches to 6 kg/cm2 .
Auxiliary compressor has one drain coc on pneumatic panel. Normally this coc should be horizontal to pipe line (i.e. closed) Auxiliary compressor – MCB 48.1in SB -2 Pane
