Q1.) Which of the following DOES NOT affects on backup setting methodology for ICT -
ICT Operates in grid
ICT has tertiary winding
ICT taps on IV side
ICTs are auto transformer
Q2.) The term ICT is due to -
A) It connects two EHV busses
B) It connectes generation to transmission
C) It connects two networks at different voltage levels
D) It's capacity is large
Q3.) For ICTs operating in grid having open delta tertiary; there is fault current through ICT for single line to ground fault -
At HV Bus Only
At LV Bus Only
At HV as well as LV Bus
None of this
Q4.) If TMS calculations done without considering delta winding of the ICT; actual time of operation for E/F backup relay will be -
Less
More
Depends on Source Impedance
Depends on ICT Reactance
Q5.) For ICTs it is common practice to use backup directional relays for -
A) HV and IV side
B) Only on IV Side
C) Only on HV Side
D) Depends on ICT capacity
Q6.) For ICTs while calculating PSM for overcurrent it is NOT necessary to consider -
Alarm Scheme
Load trimming scheme
ICT Taps
CT Ratio
Q7.) Time of operation for ICT backup relay shall be -
350 ms
500 ms
750 ms
1000 ms
Q8.) While calculating TMS for ICT IV side E/F relay (Forward) consider fault current contributed by ICT for -
LLL HV Bus Fault
SLG HV Bus Fault
LLL IV Bus Fault
SLG IV Bus Fault
Q9.) PSM for ICT IV Side forward direction overcurrent relay -
A) As per ICT capacity
B) Not needed as per ICT capacity
C) Less than ICT capacity
D) More than ICT capacity
Q10.) ICT backup relay current for fault in IV side differential Zone when compared with that of HV bus fault will be -
Significantly more
Significantly less
Marginally high
Marginally low
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