BHG2-500 / 10-2G flameproof high voltage cable junction box supply high voltage cable boxes flameproof high voltage cable boxes (hereinafter referred to as junction boxes) for explosive gas (methane) mines and coal dust mixture in the coal mine for the voltage to 6-10 kV, current up to 400 315 200 amps, the system rated current to 12.5KA disconnect the power supply system, connecting two rubber-sheathed cables for mining purposes. Flameproof enclosure junction box for steel structure, covered with bolts crimp form, on both sides of the power supply pins, and a control line drawing device. Case features three main terminals, terminal on the platen will crimp the cable head. Base for high-voltage porcelain, and has an auxiliary terminals BHG1 series flameproof high voltage cable boxes 1 Scope This standard specifies the requirements for the user to understand the product, proper handling, installation, use and maintenance and content. 2, the implementation of standard junction box to perform GB3836.1 ~ 3-2000 and MT / T946-2005 "coal with increased safety high voltage cable boxes" and Q / GD001-2008 "flameproof high voltage cable junction box" standard. 3. Overview 3.1 junction boxes for explosive gas (methane) and coal dust mixtures in coal mine coal roadway connecting the power cable circuit wiring purposes. Can be used for rubber and armored cable. Model meaning 3.4 3.2 Ex-mark: "ExdI" 3.5 Explosion-proof type: flameproof 4, junction boxes suitable working conditions following the work environment: 1. Altitude less than 1000m; 2. the ambient pressure (86 ~ 110) kpa ; 3. the ambient temperature (-20 ~ + 40) ℃; 4. air relative humidity less than 98% (+ 25 ℃ when); 5. With coal mine methane and coal dust explosive mixture; 6. No significant shake and severe shock and vibration the environment; 7. No damage metal and insulation of gases and vapors environment; 8. Pollution degree: 3; 9. Installation category: Ⅲ class. 5, the structure of the junction box is from the shell, cover and wiring porcelain seat components. For preventing cable pull-out of the casting plate is designed with a curved groove, the pressure line to improve the reliability. Porcelain pedestal selected excellent performance high-voltage ceramic powder baked, with a strong insulating properties. Clearances between the junction box inside a charged body, and creepage distances are in line with the standard requirements.