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    400A High Voltage DC Contactor, 12V/24V coil

    Favorable price high voltage DC contactor for sale, with 400 amps rated load current of contact circuit, 1NO or 1NC contact form, available with 6V/12V/24V/36V/48V/60V/72V/84V/120V/150V/220V DC, 220V AC coils. This magnetic HVDC contactor is an electrical device designed to control and switch high voltage direct current circuits.
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    Delivery date: 6-12 days

    400A high voltage DC contactor operates as a switch, allowing or interrupting the flow of DC electricity in high voltage applications, typically ranging from a few hundred volts to several kilovolts. These HVDC contactors are crucial in various industrial and commercial applications, such as electric vehicles (EVs), renewable energy systems (like solar and wind), railways, and power distribution networks.


    Model ATO-SEV400AH
    Contact Form (Optional) 1NO or 1NC
    Coil Rated Voltage (Optional) 6V/12V/24V/36V/48V/60V/72V/84V/120V/150V/220V DC, 220V AC
    Contact Rated Voltage 5-1000V DC
    Contact Circuit Rated Load Current 400A(DC-1)
    Main Contact Voltage Drop >80mV (Under 100A Load)
    Cooling Pull-in Voltage >70% (20±5℃)
    Cooling Release Operating Voltage >35%,<5% (20±5℃)
    Coil Operating Voltage Range 0.8-1.2Us (40℃)
    Power-on Action Time 80ms
    Power-off Release Time 20ms
    Max. Bounce Time of Contact Connection 10ms
    Max. Bounce Time of Contact Disconnection 7ms
    Insulation Resistance 100mΩ
    Dielectric Strength 50Hz/60Hz 2200VAC 1 Minute
    Max. Switching Capacity of Main Contact 1500A/5ms at 48V DC (Power on for 5ms)
    Coil Power Consumption H: Start 30-60W, Maintain 4-10W
    Coil Temperature Rise ≤45K
    Terminal Temperature Rise ≤65K
    Electrical Life 20000 Times
    Mechanical Life 300000 Times
    Work Specifications Continuous
    Contact Material Alloy
    Maximum Influx Time 130ms
    Maximum Switching Current 2500A 320VDC (More Than 1 Time)
    Maximum Switching Power 800kW
    Load Terminal Type M10 Screw
    Coil Terminal Type 0.3 Square Silicone Wire, 390mm Long
    Auxiliary Contact Rated Load 3A/30VDC
    Contact Terminal M10 Tightening Torque >20.5N.m
    Coil Lead Method Wire Ends Dipped in tin (red+, black-)
    Ambient Temperature -40~+85℃
    Relative Humidity +20℃ 98%
    Vibration Frequency of Fixed Place 3G, 1~50Hz, Amplitude 0.5mm
    Impact (60~100) Times/min, Acceleration ≤4g
    Altitude 2000 Meters
    Installation Direction Any
    Protection Level IP68
    Certification CE, FCC, RoHS

    Load Characteristic Curve

    400A high voltage DC contactor load characteristic curve

    Coil Temperature Rise Curve

    400A high voltage DC contactor coil temperature rise curve

    Installation Dimension

    400A high voltage DC contactor installation dimension

    Wiring Diagram

    400A high voltage DC contactor wiring diagram

    Tips: How does a high voltage DC contactor work?

    A high voltage DC contactor is an electrical switching device used to control and switch high-voltage DC circuits. Here's how it works:

    • Electromagnet drive: When the contactor coil is energized, the electromagnet generates a magnetic field that attracts the movable contacts and makes them come into contact with the stationary contacts, thus closing the circuit.
    • Arc extinguishing device: In a high-voltage DC circuit, an arc is generated when the circuit is opened. The contactor is equipped with a special arc extinguishing device, such as a magnetic blowing device or an air blowing device. The arc is elongated, cooled and finally extinguished by arc blowing to ensure safe breaking.
    • Auxiliary contacts: Contactors are also equipped with auxiliary contacts for controlling signal circuits or providing status feedback.
    • Mechanical structure: The mechanical interlocking mechanism inside the contactor ensures that the contacts move quickly and reliably during the opening and closing processes, reducing arc generation time and loss.

    High voltage DC contactors are widely used in power systems, rail transit, energy storage systems and other fields to provide efficient and safe current control and protection.

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