Flameproof high voltage cable junction box BHG1 mine Scope This standard specifies requirements and content for the user to understand the product, proper handling, installation, use and maintenance. BHG1 mining flameproof high voltage cable junction box perform standard junction box perform GB3836.1 ~ 3-2000 MT/T946-2005 "for use in mines increased safety high voltage cable junction box" and Q/GD001-2008 "Mine Flameproof high-voltage cable junction box standard. BHG1 series of mining flameproof high voltage cable junction box to Overview BHG1 series mine flameproof high voltage cable junction box referred to mine high voltage junction box or mining flameproof high voltage junction box, mine flameproof high voltage cable junction box shape sub-ore with a high-pressure two-way junction box, mine with high-pressure three-way junction box; the voltage points 6KV high voltage junction box, 10KV high voltage junction box, current 200A, 315A, 400A BHG1 series mining flameproof high voltage cable junction box Product Model meaning Ex-mark: "ExdI" explosion-proof type: Mine Flameproof BHG1 series of mine working conditions with flameproof high voltage cable junction box, junction box suitable for the following environments: Altitude not more than 1000m; ambient air pressure (86 ~ 110) kpa; 3, ambient temperature (-20 to +40) ° C; air relative humidity less than 98% (+25 ℃ pm); 5, with an explosive mixture of methane, coal dust, coal mine; 6, no significant shaking and severe to impact vibration environment; 7, in the environment without breaking the metal and insulation gases and vapors; 8, Pollution degree: 3; 9 Installation Category: Ⅲ class. BHG1 series of mining flameproof high voltage cable junction box structure of the junction box from the shell, cover and wiring porcelain stand (see Figure 1). For preventing cable pull off the platen designed as castings, with the arcuate grooves to improve the reliability of the pressure line. Porcelain the seat chosen the excellent performance of high voltage ceramic powder baked, with strong insulation properties. Inside the junction box between the charged body clearances and creepage distances are in line with the standard requirements. BHG1-200/10-2, BHG1-400/10-3 (2) BHG1-400 (315,200) / 6-3 (2) the outline drawing BHG1 series of mine on the main parameters of the flameproof high voltage cable junction box junction box parameters are shown in Table 1. Creepage distance electrical clearance (mm) (mm) cable diameter (mm) control the rated current of the line rated voltage control circuit BHG1-400 (315,200) / 6-3 (Table 1 Type Rated voltage (kV) Rated Current (A) ) 6 200,315,400 60 80 φ68 ~ φ78 127V 5A BHG1-200/10-2 10 200 100 125 φ68 ~ φ78 127V 5A BHG1-400/10-3 (2) 10 400 100 125 φ68 ~ φ78 127V 5A Dimensions and Weight Overall Size (mm) Weight (kg) BHG1-400 (315,200) / 6-2 856X552X220 60 BHG1-400 (315,200) / 6-3 885X400X220 70 BHG1-400 (200) / 10-2 906X420X256 70 BHG1-400/10-3 876X562X256 80 workers to frequency withstand voltage rating kV Power frequency withstand voltage kV 7.2 23 12 30 0.127 2 Note: frequency voltage withstand test lasted 1min no breakdown and flashover. Series BHG1 mining flameproof high voltage cable junction box Failure Analysis and Troubleshooting junction box long-term use of power, found off the power, open the lid, check for loose cables, such as loose cable compression can. BHG1 series of mining flameproof high voltage cable junction box installation and commissioning of the installation of the cable junction box in Inoue also in the underground cable installation should first be checked carefully, its jacket intact core wire should be no moisture intrusion, take to the junction box to see signs, warning signs and fasteners are complete, separate and wiring cavity and in the shell, with a special wrench to loosen the nut platen, and then be installed in accordance with the following procedure. 1, the cutting and stripping monitor mask cable first will monitor the shielding jacket cut peel 255mm, attention not to damage the metal shield to form two small resolution, and then, at 233mm at the second layer (i.e., rubber insulating layer), cutting and stripping open, then the ground outside the three main core wire shielded twisted together and compiled a small resolution last three small resolution put plastic pipe spare. The three main core line taken by the amount of end 35mm, cut peel and rasps and sandpaper to clean semiconductor layer. - Plastic tube - the monitor screen line 3 - main core line wire 4 - the main wire insulation 5 - Ground shielded wire 6 - Stress Cone 7 - butyl adhesive tape at winding layer 8 - the cable sheath 9 - epoxy the resin casting agent 10 - plastic or rubber funnel 2 packets wrapped around stress cone 1 - butyl self-adhesive rubber wrapped 2-3 layers with 2 - Semiconductor 3-14 # -16 # fuse 4 - butyl self-adhesive rubber adhesive tape tape 5 - 1 to 2 layers of polyethylene wrapped band in the semiconductor from the cable at the end portion 178mm D = d +12 with butyl self-adhesive rubber belt package, and L = 40mm stress cone (see Figure 2), and then use adhesive tape winding layer, and 14 # to 16 # fuses wound the stress cone surface near the cable side of the root to the roots. In addition to the stress cone part, butyl self-adhesive rubber band wrapped around three, three main core line except the end 35mm length range all the polyethylene tape wrapped 1-2 layers. 3, pouring the cable head first rubber seal trap into the cable, and the cables through the wiring cavity cables protruding part about 277mm, then pouring its roots 52mm at the epoxy cast epoxy resin process is as follows: In the root of the cable head to put on the right size of cable sealing sheath; open the small cover, remove the vial; epoxy resin complex agitation outside the bottle to make it uniform; within the bottle curing agent is injected into the outside of the bottle, and Stir -10min; tightly closed, cut off the lip, the epoxy resin injected into the funnel, 20 to 40min after resin curing, remove the funnel to wiring installation. , Wiring, cables main core: Loosen the terminal on the nut, has a good peel the main core thread insert wiring platen with special tools, the nut is tightened so that the main core wire clamping pressure prison date. 2, then monitoring shielded and grounded shielding line a) monitors the shield wire are respectively connected to the control line of the set in the junction box connection seat. b) grounded shielded cable with the grounding bolt housing connected and pressed. 3, check to access the live parts of the three main core line housing to the inner wall of the clearances, creepage distance should be not less than the requirements in Table 1, which do not meet the requirements should be re-adjust. 4, check flameproof surface, when the confirmation is in good condition, will be covered with lid and tighten bolts. 5, the installation of the junction box flameproof gap shall not be greater than the value of the product standard requirements. BHG1 series of mining flameproof high voltage cable junction box to use and maintain a junction box should be hanging in no watering roadway sidewalls on the line installed at both ends of the external junction boxes and underground grounding must be reliably connected . 2, junction boxes non-electrified operation, installation and removal of the junction box must be power to ensure that no residual voltage and residual voltage of clear, reliable discharge be cleared in accordance with security procedures. 3, install the pressure plate can not be too tight, to avoid core wire deformation and failure of the insulation. 4, in the maintenance and repair non-charged opening the lid! Non-injury flameproof surface! SERIES BHG1 mining flameproof high voltage cable junction box packaging, transportation, storage 1 each junction box with a plastic bag suit, in wooden boxes. During transport to prevent shock, rain. Junction box should be stored in a sleet invasive relative humidity less than 90% (20 ± 5 ° C) temperature not higher than +40 ° C, not lower than -25 ° C and air flow of good warehouse, flameproof The surface should be coated with anti-rust oil every six months to check again. BHG1 series mining flameproof high voltage cable junction box out of the box, confirm box in good condition, in a sheltered, dry place out of the box. 2, check the following random file attachments is complete: a) certificate; b) Packing List; c) manual; d) special tools; e) cable sealing sheath. BHG1 series mining flameproof high voltage cable junction box Order Information 1 junction box model, name, rating parameters; 2, quantity; 3 whether to order spare parts.