PETROLEUM REFINERY ENGINEERING QUIZ

Spots

Icons

Pixels

Points

No harmonic problems

Simple protection

Low cost of HVDC terminals

Minimum line power losses

Unbalanced protection

Switching over voltages

Magnetizing inrush current

Lightning

Lightning and switching surges

Lightning surges

Switching surges

Voltage level of the line

Current is maximum and power factor is 0.5

Current is minimum and power factor is 0.5

Current is maximum and power factor is unity

Current is minimum and power factor is unity

Conductor

Capacitor

Resistor

Voltage source

0.4 %

6 %

5 %

4 %

Direct stoke on tower top

Direct stroke on line conductor

Indirect stroke on conductor

Direct stroke on ground wire

Software

Hardware

Logic

Algorithm

An inverse characteristic for low values of the fault current and a definite time characteristic for high values of the fault current

An inverse time current characteristic

A definite time cuttent characteristic

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