The function and quality of the electric cable electricity of the examination correspondence of various experiment.Include to lead the line direct current electric resistance test, the electric resistance test of the back track unbalance, insulate electric resistance test, hand over direct current to bear electric voltage test, work electric capacity test, the electric capacity Ou match with electric capacity unbalance test, the string sound(string words) Shuai reduce and string the sound defend a degree test, electric cable of once and two times deliver parameter test, the coaxial cable Shuai reduce test, the Shuai reduce temperature coefficient test and rightness some correspondence what electric cable carry on shield coefficient test.
The electric resistance test lead line direct current electric resistance to be an examination electric cable manufacturing quality and design increase a sound segment long-distance leave power supply system of importance one of the index signs.The difference of direct current electric resistance is main is manufacturing process in of deal with contact bad, craft control poor(such as lead line diameter deviation, inner part existence miscellaneous quality etc.) cause of.Direct current electric resistance usually the adoption direct current bridge method test.In the symmetry back track, 2 lead line of electric resistance value bad value lead big, meeting break back track of balance, cause a string of sound.
Insulate the electric resistance is the index sign that the assurance line heart insulate quality, number lead low will reduce the back track Shuai, back track string sound and conduct electricity line mind to carry on of long-distance leave power supply to have bad influence.The factory is in common use comparison method or Gao Zu3 Ji4's method to carry on a test.
The work electric capacity of the electric capacity test two root deliver line heart unit length of total electric capacity.The wave resistance of its size and line rightness with deliver Shuai to reduce close related.Because the coaxial cable have a resistance and asymmetry of specialized test, past the factory experiment general don't work to make electric capacity measure, connect construction go together with dish also adoption wave the resistance go together with dish, symmetry electric cable factory experiment want with under constructionly all to carry on that test.