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    Automatic Transfer Switch, 3/4 Pole, 250/315 to 630 Amps

    Automatic Transfer Switch is a brand-new intelligent dual power ATS with the selections of 250A, 315A, 350A, 400A, 500A, 630A of rated operational current, adjustable 0~30s delay time. It is a safe and reliable switch to transfer the power sources in many critical areas.
    SKU: ATO-ATS-630
    Free Shipping Worldwide
    Delivery date: 6-20 days


    • Suitable for 400V AC 50Hz with rated working current 250A, 315A, 350A, 400A, 500A, 630A
    • With automatic and manual operation
    • Three switching position for option: normal power ON, dual power OFF, standby power ON
    • Small size, light weight, stable running, and easy to use
    • Suitable for residential areas, military facilities, hospitals, shopping malls, airports and so on


    Model ATO-ZMQ2F/L-630
    Frame Current 630A
    Rated Operating Current (Optional) 250A, 315A, 350A, 400A, 500A, 630A
    Number of Poles (Optional) 3-pole 4-pole
    Breaking Current 35kA 30kA (250A, 315A, 350A), 50kA (400A, 500A, 630A)
    Rated Operating Voltage 400V
    Insulation Voltage 2500V one minute, no flicker and no breakdown for one minute
    Frequency 50-60Hz
    Delay Time 0-30s (Adjustable)
    Rated Working Voltage of Controller 230V AC
    Service Life (Mechanical) 5,000 times
    Structural Type (Optional) Integral type (F) or split type (L)
    Environment Altitude ≤2000m
    Ambient Temperature -5℃~+40℃, the 24-hour average temperature does not exceed +35℃
    Relative Humidity RH≤50% @ +40℃; at a lower temperature, it is allowable to have a higher humidity.
    Please pay more attention to the condensation produced on the product surface with the change of humidity.
    Installation No explosive medium, and no medium of gas and dust is enough to corrode and damage the insulation.
    No significant shock and vibration.
    Standards Compliance to IEC6094-6-1, GB14048.11-2008
    Weight 32kg
    Dimensions See below

    ATS Dimensions (Unit: mm)

    Automatic transfer switch ats dimensions

    Type W W1 L L1 H
    ZMQ2F/L-630/3P 630 575 320 295 195
    ZMQ2F/L-630/4P 715 665 320 295 195

    Wiring Diagram
    3 Pole or 4 Pole Automatic Transfer Switch Wiring Diagram
    *The above wiring diagram is just for your reference. With the different types and functions, the wiring is also different.
    *When the fire takes place, EPS signal is on (provided by firefighting center) and the circuit breakers Q1 & Q2 is released or cut off.
    *Q1 & Q2 refer to circuit breakers.
    *KG refers to the wiring terminals.
    *The R & N power ON indicator lamps are external (provided by users).
    *The dashed part is supplied by users.

    Tips: Automatic transfer switch trips but the light is on, how to do?
    Possible causes:

    • Transportation causes the tripping of ATS circuit breakers.
    • In the usage, the ATS circuit breaker trips.


    1. If it is caused by transportation, reconnect the molded case circuit breaker by hand, and then changeover to automatic position meanwhile press the reset key.
    2. If the tripping is caused in the use, first check the load conditions of circuit breaker.
    • If tripping is the cause by short circuit, first troubleshoot the short circuit and then transfer switch manually or automatically. During the troubleshooting of short-circuit fault, manual or automatic changeover is not allowed, which may cause secondary short circuit or personal injury.
    • In the case of tripping under overload conditions, first check the load of the electrical equipment, and check whether the rated current of the molded case circuit breaker of the ATS can meet the load. If not, replace the molded case circuit breaker as much as possible. Otherwise, the circuit breaker will frequently trip, which causes burnout of the circuit breaker static and movable contacts and affects the power supply system.
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