Recommended == coal safety certification complete mine mine power supply systems, high voltage power supply lines are generally used armored cable cable mining cable, its failure rate is relatively low voltage power supply used rubber cable less and more. The powered mining area is the weak link in the power supply system, the work environment and poor, and thus how to choose the model of the cross-section of the cable, and related to the security of power supply to run. The following describes the selection method of selection of cable and cable section. · Cable model cable model of choice, select, and reliability of supply, security and whether the economy is reasonable and a great relationship. Article 167 of the "Coal Mine Safety Regulations" selection of cable formulated the requirements of the following options: · 1. Difference in level of the actual cable laying location should allow the laying of the level of the required cable difference adapt. · 2. Cables with sufficient cross section for protective grounding conductor. · 3. Prohibited the use of aluminum sheathed cable. · 4 must be selected to have passed the test and get the coal mining product safety signs retardant cable. · 5 cable cross-section of the main core should meet the supply line load requirements. · 6. Fixed laying high voltage cable requirements: · (1) Mine Shaft or inclination of 45 ° above the roadway, PVC insulated thick steel wire armored PVC sheathed power cable, XLPE insulation thick steel wire armored PVC sheathed power cable. · ⑵ the horizontal roadway or roadway within an angle of 45 ° below PVC insulated steel or thin steel wire armored PVC sheathed power cable, crosslinked ethylene steel strip or thin steel wire armored PVC guard sheathed power cables. · ⑶ deviated into the wind between the shaft bottom and near the central substation to the mining area substation can use aluminum cable; other locations must use copper cable. · (4) low-voltage cable of fixed laying Mw armored or non-armored cable or corresponding voltage level mobile rubber sheathed cable. · (5) non-fixed high and low voltage cable laying, must meet the the Mr818 standard rubber soft cable. Mobile and hand-held electrical equipment should use special rubber cables. · (6) lighting, communications, signal and control cable should be sheathed communication cables, rubber cables or M, plant, plant that caused power cables. · (7) low voltage cables should not be using the aluminum core, the mining area prohibited the use of low-voltage cable Lvxin. The choice of the choice of cable section · · Two cable cross-section, including the selection of high-voltage cable cross-section and low-voltage cable section choice, and the choice of a low-voltage cable section. · 1 the cable main core line selection · general mining area of ??low pressure supply line longer than the current flow through the cable running fever will cause a pressure drop. To guarantee the normal work of the cable and motor in select cable section, shall comply with the following four principles: ⑴ cable normal operation, the actual temperature rise should not exceed the maximum allowable temperature rise of the insulation. · (2) allows the voltage loss in the cable line work choices. · ⑶ cable section selected to meet the requirements of mechanical strength. Mine cable with ground equipment and downhole equipment in coal mining industry Chi wire and cable products. Including Shearer, transport aircraft, communications, lighting and signaling equipment the cap lamp wire and cable, as well as drill cables, and underground mobile substation with power cables etc. the. www.tianlan88.com Sales Manager - Bi Jingli Tel - 0316-5960412 Mobile - 13,131,682,147 organization code certificate :10950374-4 CCC certification number: 2003010105102124 business license registration number: 1310251400055 Account: 91608040020110001507 Bank: Dacheng County, Hebei Province, Liu solid offer rural credit cooperatives Contact: Bi Jincheng President (Sales Manager) Tel :0316 -5960412 Fax :0316 -5962228 Website: http://www.tianlan88.com