Mineral Insulated Cable

● The rated voltage of mineral-insulated cables:light load(BTTQ、BTTVQ、WD-BTTYQ)500V and heavy load  (BTYTZ、BTTVZ 、WD-BTTYZ)750V.

● Testing voltage of mineral-insulated cables:light load 2000V/1min and heavy 2500V/1min.

● The insulation resistance of mineral-insulation cables shall be more than 1000MW; when  the length of cable is less than 1000m, the insolation resistance shall be more than 10,000MW.

● Long-term service temperature of mineral-insulated cables:The long-term service temperature of mineral insulated cables is 70℃.In areas inaccessible to people ,the long-term service temperature is 105℃;in special high temperature circumstance,the long-term service  temperature can reach 250℃.When the temperature keeps at 950-1000℃, the cable can sustain power supply for at least 3 hours;during a short or extremely short period,the service temperature can reach 1083℃.

● Curve radius:The possible minimum curve radius of mineral-insulated cables shall be in line with the above form.