No. Conductor resistance is. Cable insulation resistance to ground is inversely proportional to its length. The longer the cable, the more leakage path to ground; therefore, the lower the insulation resistance to ground.
1000 KVA Megger is generally used power Power Cabelling.
AnswerUsing a high-voltage direct-current test set (such as a 'HiPot' tester) which can subject the cable insulation to voltages higher than their rated values for a set period of time. The actual test voltages and times are as recommended by the cable manufacturers and endorsed by the electricity network companies responsible for installing the cables.
the temperature that can be withstood by a cable is called its thermal resistance ...
the more the thermal resistance of cable the safer it is ....
Copper xlpe armoured cable
I think you mean 'insulation resistance'. This is exactly what it says it is, it is the resistance between opposite sides of an insulator or dielectric. It is in the order of megohms and, in the case of a cable, is inversely proportional to its length -i.e. the longer the cable, the lower its insulation resistance.
resistance will increase because we know that resistance is directly proportional to length.AnswerThe increase in resistance will cause an increase in the voltage drop along the cable; if this is excessive, then a cable with a greater cross-sectional area must be used to compensate. Howto choose an appropriate cable for a given length can be determined from the relevant wiring regulations for your country.
The insulation resistance remains the same throughout the entire length of the conductor.
Thermal stress ( and strain) arrises at situations, when there are some area with diffrent temperature in the same body. Or at situatiom - one konstruction part restricts thermal expansion ( dilatation ) another part. Or - two parts (f.e. austenit - ferrit steels ) are in welded connection.
no
The thermal resistance of a wire is proportional to ln(r2/r1), meaning that a thicker wire has a greater thermal resistance.
Thermal Energy: Substance that has energy from the movement of its particles.
Thicker cable loses less thermal energy.
Copper xlpe armoured cable
Strength. Weather Resistance. Fire Resistance. Durability. Dimensional Stability. Chemical Resistance. Thermal Resistance. Working Conditions.
It is the rate of resistance of a material to heat.
Thermal resistance: diamond Electrical resistance: copper Optical resistance: quartz
ability of the material to resist the temperature
The thermal vibration of the atoms in the material increases the resistance of that substance. The resistance is greatly depends on temperature.
A: There is only one source thermal
The internal resistance of a device is the resistance in ohms of that device. It is the resistance electrons need to overcome before electricity is said to flow.