Home > Products > Switch > Other Switches > Kjz-800/ 1140 Mine-Used Flameproof and I. S. Vacuum Feed Switch, Electromagnetic Starter, High-Voltage Switch, Soft Starter
    Kjz-800/ 1140 Mine-Used Flameproof and I. S. Vacuum Feed Switch, Electromagnetic Starter, High-Voltage Switch, Soft Starter
    • Kjz-800/ 1140 Mine-Used Flameproof and I. S. Vacuum Feed Switch, Electromagnetic Starter, High-Voltage Switch, Soft StarterKjz-800/ 1140 Mine-Used Flameproof and I. S. Vacuum Feed Switch, Electromagnetic Starter, High-Voltage Switch, Soft Starter
    • Kjz-800/ 1140 Mine-Used Flameproof and I. S. Vacuum Feed Switch, Electromagnetic Starter, High-Voltage Switch, Soft StarterKjz-800/ 1140 Mine-Used Flameproof and I. S. Vacuum Feed Switch, Electromagnetic Starter, High-Voltage Switch, Soft Starter
    • Kjz-800/ 1140 Mine-Used Flameproof and I. S. Vacuum Feed Switch, Electromagnetic Starter, High-Voltage Switch, Soft StarterKjz-800/ 1140 Mine-Used Flameproof and I. S. Vacuum Feed Switch, Electromagnetic Starter, High-Voltage Switch, Soft Starter
    • Kjz-800/ 1140 Mine-Used Flameproof and I. S. Vacuum Feed Switch, Electromagnetic Starter, High-Voltage Switch, Soft StarterKjz-800/ 1140 Mine-Used Flameproof and I. S. Vacuum Feed Switch, Electromagnetic Starter, High-Voltage Switch, Soft Starter

    Kjz-800/ 1140 Mine-Used Flameproof and I. S. Vacuum Feed Switch, Electromagnetic Starter, High-Voltage Switch, Soft Starter

    (one) ApplicationKJZ-800/1140Mine-used Flameproof and I.S. Vacuum Feed Switch is suitable for underground coal mines with explosive gases such as methane. It can be used as the main switch or branch switch for the 3-phase neutral-point ungroundedpower supply system which is at 50 Hz, rated voltage 1......

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    Product Description

    (one) Application
    KJZ-800/1140Mine-used Flameproof and I.S. Vacuum Feed Switch is suitable for underground coal mines with explosive gases such as methane. It can be used as the main switch or branch switch for the 3-phase neutral-point ungroundedpower supply system which is at 50 Hz, rated voltage 1140 V (660 V), rated current up to 1000 A. It also can be used for infrequent startup control of large-capacity motors. It can cut off the power supply automatically when any fault occurs such as overload, short circuit, phase loss or leakage. As a main switch, it has a 3-phase symmetrical leakage locking protection function. As a branch switch, it has selective leakage protection and leakage locking protection functions. It has over-current protection with inverse time characteristics, and it has large-current non-voltage release protection for proximal outlet short-circuit. It is a protection device suitable for wide use in the coal mine industry.
    (two) Technical Parameters
     
     
    Rated Working VoltageAC1140V,660V
    Industrial Frequency Withstand Voltage4200V/1min
    Rated Frequency50Hz
    Rated Current1000A 800A630A 500A400A 200A
    Ultimate Breaking Capacity30000A15000A7500A

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