PHEP 31 Flashcards
TRANSMISSION LINES ARE USED FOR THE PURPOSE OF
ALL THREE
IN DISCUSSING RELATED CHARACTERISTICS OF TRANSMISSION LINES IT CAN BE SAID THAT THE HIGHER THE VOLTAGE
THE LOWER THE (I SQUARED R) LOSSES
ELECTROSTATIC AND ELECTROMAGNETIC UNBALANCE BETWEEN PHASES IN A 3 PHASE TRANSMISSION LINE IS REDUCED BY
TRANSPOSING OR ROTATING THE CONDUCTORS
THE ENERGY STORED IN THE MAGNETIC FIELDS OF THE CONDUCTOR IS
CALLED WATTLESS ENERGY
THE STEEL CORE OF ACSR CONDUCTORS DOES NOT
CARRY ANY APPRECIABLE AMOUNT OF LOAD CURRENT
SUSPENSION TYPE INSULATORS
ALL THREE
TRANSMISSION LINE LOSSES DUE TO CORONA MAY BE REDUCED BY ALL OF THE BELOW EXCEPT
INCREASING VOLTAGE VALUE
BUNDLED CONDUCTORS
REDUCE INDUCTIVE REACTANCE
AN ELECTRICAL TRANSMISSION SYSTEM MAY BE CAUSED TO DROP OUT OF STEP OR BECOME UNSTABLE BY
ALL THREE
SWITCHING PERFORMED UNDER SHORT CIRCUIT CONDITIONS IS APT TO BE MOST DISTURBING TO TRANSMISSION LINE WHEN
DONE ON THE LOW VOLTAGE SIDE
THE VOLTAGES INDUCED IN THE LEAD SHEATH OF UNDERGROUND CABLES MAY BE ELIMINATED BY
ALL THREE
A MATERIAL SUCH AS THYRITE WOULD MOST LIKELY BE USED IN
A VLV TYPE LIGHTNING ARRESTOR
ALL OF THE BELOW ARE CONSIDERED AS ADVANTAGES IN THE TRANSMISSION OF HVDC AS COMPARED TO AC EXCEPT FOR
THE OVERALL INSULATION REQUIREMENTS MAY BE BASED ON THE PEAK RATHER THAN THE ACTUAL VOLTAGES
HVDC TRANSMISSION LINES
CANNOT BE PROTECTED FROM FAULTS BY USING CONVENTIONAL CIRCUIT BREAKERS
IN A HVDC TRANSMISSION SYSTEM
THE QUANTITY AND DIRECTION OF POWER FLOW MAY BE CONTROLLED WITH ACCURACY AND EXTREME RAPIDITY
