Cable Types Flashcards
What type of conductor is this?
Annular
What type of conductor is generally used for sizes above 1,000 kcmils?
Annular
What type of conductor is this?
Concentric Round
How many conductors are added on each layer of a concentric round conductor?
6
What type of conductor is this?
Compact Round
What are the advantages of Compact Round cable?
Less weight
Smaller outside diameter
What are the disadvantages of Compact Round cable?
Less Flexible
What type of cable is this?
Compact Sector
What is the purpose of the compact sector shape?
Obtain a smaller diameter
What are the advantages of compact sector shape?
Low reactance, lower voltage drop, and smaller cable diameters.
What type of cable is this?
Segmental
What is the advantage of segmental configuration?
Reduce skin effect
label the image
A. jacket
B. insulation
C. conductor strand shield
D. conductor
Label the image
A. Jacket
B. Bedding Tape
C. Metallic Shield
D. Semi-Conductor
E. Insulation
F. Strand Shield
G. Conductor
Unshielded cable use is normally limited to ? .
7.2 kV
What is the purpose of strand shielding?
To prevent electrical breakdown of the insulation, due to the ionization of the air gap between the insulation and the conductor
What is the purpose of the Insulation shielding?
When the conductor is laid on the ground, the magnetic field is concentrated on the bottom of the conductor. A metallic shield wrapped around the insulation of the conductor to allow a grounded surface to uniformly contain the magnetic field.
Strand shielding is made from ? materials.
semiconducting
Large power cables use ? , which makes the cable flexible.
stranded conductors
Copper conductors have a higher conductivity than aluminum.
true
Aluminum conductors can be damaged by ? when touching other metals in the presence of water.
galvanic reaction
Three of the most common materials used as insulation for power cables are taped insulation, thermoplastics, and ? .
rubber
Voltage, current, and ambient temperature are three factors used to determine the type of cable insulation for a specific use.
true
Cable with impregnated-paper insulation has a ? sheath.
lead
Bedding tapes are used in cables to add mechanical strength.
true
Lead sheathing is the most effective type of protection for insulation against moisture, weather, and oxidation.
true
