The myjv22-10kv cable ampacity refers to the maximum current that the cable passes through to the absorption operation at the maximum allowable temperature. The maximum temperature of the cable depends on the thermal aging properties of the cable insulation material. Because the operating temperature of the cable is too high, the aging of the insulation material is accelerated and the cable life is greatly reduced.
According to MT818-2009 standard, the rated voltage Uo of mine power cable is 3.6kv and above XLPE insulated cable should be subject to partial discharge test. The partial discharge test shall be performed on all cores of the cable. When AC voltage 1.73Uo is applied, the discharge capacity of XLPE insulated cable should not exceed 10pC.
The myjv32 mining cable has different rated voltage and different cable current carrying capacity. Myjv32-6/10kv3*70 cable carrying capacity is: 240A; mining cable current carrying capacity is the heating and thermal change law of the cable under the actual laying and operating conditions. , Downward wire and cable capacity factors, such as: line characteristics (such as operating voltage, current type, frequency, load factor). Cable and wire structure (conductor core structure, the number of core, insulation material type, shielding layer And inner and outer jacket structure and materials, total outer diameter); laying conditions (such as: air laying, laying in pipes, laying directly buried, laying underground channels, water laying, etc.); maximum permissible operating temperature of conductive lines and the surrounding environment Conditions (such as: air and soil temperature, soil thermal resistance coefficient, proximity effect of surrounding heat sources), etc. Therefore, the wire and cable ampacity test is a long-term basic research work, and it is an urgently needed technical work. The research test involves The scope is very broad. The most basic one is to study the law of temperature rise and heat dissipation after the current is passed through the wire and cable products. Through a large number of tests, the maximum allowable ampacity is obtained in a typical case, and a total of units are used rationally.
According to MT818-2009 standard, the rated voltage Uo of mine power cable is 3.6kv and above XLPE insulated cable should be subject to partial discharge test. The partial discharge test shall be performed on all cores of the cable. When AC voltage 1.73Uo is applied, the discharge capacity of XLPE insulated cable should not exceed 10pC.
The myjv32 mining cable has different rated voltage and different cable current carrying capacity. Myjv32-6/10kv3*70 cable carrying capacity is: 240A; mining cable current carrying capacity is the heating and thermal change law of the cable under the actual laying and operating conditions. , Downward wire and cable capacity factors, such as: line characteristics (such as operating voltage, current type, frequency, load factor). Cable and wire structure (conductor core structure, the number of core, insulation material type, shielding layer And inner and outer jacket structure and materials, total outer diameter); laying conditions (such as: air laying, laying in pipes, laying directly buried, laying underground channels, water laying, etc.); maximum permissible operating temperature of conductive lines and the surrounding environment Conditions (such as: air and soil temperature, soil thermal resistance coefficient, proximity effect of surrounding heat sources), etc. Therefore, the wire and cable ampacity test is a long-term basic research work, and it is an urgently needed technical work. The research test involves The scope is very broad. The most basic one is to study the law of temperature rise and heat dissipation after the current is passed through the wire and cable products. Through a large number of tests, the maximum allowable ampacity is obtained in a typical case, and a total of units are used rationally.
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