Operation & Maintenance Manual
03
STRUCTURAL DETAILS & GENERAL ARRANGEMENT
3.0 STRUCTURAL DETAILS &
GENERAL ARRANGEMENT
3.1 - Cubicle Structure
The substation facility comprises 3 compartments sealed with a
1.35 kg/cm2 rated pressure SF6 gas and a control circuit
compartment tted with control devices mechanism and a gas
pressure monitoring device.
The main circuit live section is divided into a busbar compart-
ment in which the bus running through all the cubicles. A load-
side device compartment Consists of a vacuum circuit breaker.
The busbar compartment and the load-side device
compartments are gas-sectionalized from each other. CTs are
mounted in cable compartment and top/bottom.
3.2 - Typical Arrangement
Figure 3.2.1 - Sectional View of Front Cable Entry Panel
LEGEND:
1. BUS BAR + DS CHAMBER SF6 GAS PRESSURE
MONITORING DEVICE (WITH 2 CONTACTS,
1 CONTACT FOR ALARM & 1 CONTACT FOR TRIP)
2. VIEWING WINDOW FOR DISCONNECTOR SWITCH
3. HANDLE FOR METERING COMPARTMENT
4. BREAKER COMPARTMENT SF6 GAS PRESSURE
MONITORING DEVICE (WITH 2 CONTACTS,
1 CONTACT FOR ALARM & 1 CONTACT FOR TRIP)
5. HANDLE FOR VCB & DS COMPARTMENT
6. VIEWING WINDOW FOR BREAKER STATUS INDICATIONS
7. HANDLE FOR CABLE COMPARTMENT
8. HOLE FOR ROUTING INTERPANEL WIRES
9. BUS BAR + DS GAS
COMPARTMENT
10. BUS BAR
11. FEEDER LABEL
12. CURRENT TRANSFORMER
13. REAR COVER
14. BURSTING DISK
15. DUCT FOR HOT GAS
16. POWER CABLE ADAPTER
17. EARTH BAR
18. MULTI CORE CABLE BOX
19. REAR COVER HANDLE
20. PLUG IN TYPE BUS PT
21. BASE FRAME
22. POWER CABLE (NOT IN E&A SCOPE
OF SUPPLY)
23. PANEL LIFTING HOOK
24. EMERGENCY TRIP PUSH BUTTON
FOR VCB
25. SF6 GAS FILLING POINT FOR VCB
COMPARTMENT
Front View
Side View
FINISH FLOOR
LEVEL
DISCONNECTOR
SWITCH
COMPARTMENT
METERING
COMPARTMENT
CABLE
COMPARTMENT
DISCONNECTOR
MECHANISM
BREAKER
MECHANISM
BREAKER
COMPARTMENT
GAS DUCT
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