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To reduce short circuit fault currents......... are used.

resistors
capacitors
None of these
reactors

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To protect most of the electrical equipment handling low power, the types of relays used are

None of these
Thermocouple
Both of the listed here
Electronic and bimetallic

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Relay can be designed to respond to changes in

voltage and current
All of these
temperature
resistance, reactance and impedance

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An overcurrent relay having current settling of 125% is connected to a supply circuit through a current transformer of 400/5 A. The pick-up current is

25 A
6.25 A
12.5 A
3.125 A

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To limit short-circuit current in a power system are used

earth wires
reactors
H.R. fuses
isolators

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HRC fuses provide best protection against

short circuits
open circuits
overload
reverse current

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