Worksheets9. Isolator, Jumpers, AT & Neutral Section (old)
Total questions: 15
Worksheet time: 8mins
Isolator clearance between Phase and Earth is
450-500 mm
490-520 mm
500-550 mm
550-600 mm
'H' jumper distance from support is
5.60 m
2.50 m
3.50 m
2.25 m
Cross-section of a potential equalizing jumper, small jumper, or 'F' jumper is
65 sq.mm
107 sq.mm
50 sq.mm
105 sq.mm
230 V single-phase power supply required for
Lighting of the station yard
Operation of substation equipment
Working of color light signals
All the above
Identify the jumper shown.
H-Jumper
G-Jumper
PH-Jumper
None of the above.
100 KVA Auxiliary Transformers are placed at
SSP
Major Yards
TSS
Stations
'BDV' of Transformer oil should be
30 KV / minute
40 KV / minute
60 KV / minute
100 KV / minute
Isolators are on-load switches.
True
False
PTFE stands for
Plastic Tetra Fluoro Ethane
Poly Thermo Finials Ethane
Poly Tetra Fluoro Enamel
Poly Tetra Fluoro Ethylene
In uninsulated overlap, two OHEs are connected by providing
C-Jumper
F-Jumper
G-Jumper
S-Jumper
“G” jumper is used at
UIOL
Turnout
Crossover
All of the above
PTFE neutral section is fit for the speed of
70 km/hr
90 km/hr
100 km/hr
130 km/hr
Single Pole Isolators are operated through SCADA.
True
False
Primary protection for the Auxiliary Transformer is the ‘DO Fuse’.
True
False
Neutral section shall be located at least 200 m after the stop signal.
True
False
