, JHH-4 mine intrinsically safe circuit junction box Overview of the production of the products according to Q/KH003-2010 standard. This product can be used with the coal mine communications, monitoring system cables supporting, can be used in coal mine working face, roadway cavern on down the mountain, such as gas and coal dust dangerous environment, as cable and intrinsically safe communications, surveillance systems equipment connecting means. Second, JHH-4 mine intrinsically safe circuit junction box explosion-proof type of explosion-proof mark: Mine intrinsically safe. Ex-mark: Exib Ⅰ. Third, JHH-4 mine intrinsically safe circuit with the junction box using the environment a Ambient temperature -10 ° C - +40 ° C; to b relative temperature: ≤ 95% (+25 ℃ time); c, Atmospheric pressure: 86 - 106KPa; d environment sexual gas and coal dust and other explosive substances; 3A contact e, the environment should be free of corrosive gas; 4 JHH-4 mine intrinsically safe circuits with the technical requirements of the rated voltage of 60V rated current junction box surface insulation resistance is less than 0.01 ohm insulation resistance greater than 500 megohms resistance of less than 1 × 109Ω, JHH-4 Mine intrinsically safe circuit junction box for use (1) the product in parallel to each other from the four groups composed of terminals . Three pairs in each line, a total of 12 pairs. (2) This product can only be used for the operating voltage of 60 volts DC, intrinsically safe circuit working voltage 3A. (3) the product of the seals, the inner diameter of the flat washer, according to cable diameter chosen at random in the installation. (4) The installation must tighten the line nut fastening screws, to ensure reliable sealing. JHH-4 mine intrinsically safe circuit with the junction box Use (1) This product can be used for intrinsically safe 60 volts communication, monitoring equipment, without proof review authority to confirm Road, this can not be turned on simultaneously Ann power. (2) The connector can be used to comply with the above conditions in the mine area, including the mining face. WARNING: The connector wiring operation should be carried out in case of power failure. Wiring should be noted that after the completion of the sealing of the lid and seat. , JHH-4 mine intrinsically safe circuit junction box Order Information: Order to be based on contract, product name, quantity, mailing address, zip code, station Tel write clearly and associates.