DGVCL Exam Paper (11-12-2011)
In carrier current protection, the purpose of the wave trap is for

Trapping high frequency waves entering into generator/transformer unit.
Tripping fault current
Trapping power frequency waves
All of these

ANSWER DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
An IDMT relay provides

An inverse characteristic for low values of the fault current and a definite time characteristic for high values of the fault current
A definite time characteristic for low values of the failt current and an inverse characteristic for high values of the fault current
A definite time cuttent characteristic
An inverse time current characteristic

ANSWER DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
Due to skin effect

Uniform current flows through the conductor
Current flows through the half cross section of the conductor
Portion of the conductor near the surface carries more current and the core of the conductor carries less current
Portion of the conductor near the surface carries less current and the core of the conductor carries more current

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP