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    Automatic Transfer Switch, 3/4 Pole, 250/350 to 630 Amps

    5 out of 5 based on 2 reviews | Write a review
    Brand new and economical price intelligent automatic transfer switch, with rated operating current 250A, 315A, 350A, 400A, 500A, 630A for your choice, adjustable 0~30s delay time and rated working voltage 400V AC 50Hz. With automatic and manual operation, ATS comes with microcomputer controller, easy to use and wiring, safe and reliable to transfer between two power sources in many critical areas like hospitals, banks, airports and so on.
    SKU: ATO-ATS-630
    30-day Returns
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    Delivery date: 6-12 days


    • Suitable for 400V AC 50Hz power supply system with rated working current 250A, 315A, 350A, 400A, 500A, 630A.
    • This ATS is an intelligent self-protection transfer switch mainly including two parts - microcomputer controller and transfer switch.
    • With automatic and manual operation, machinery and electrical double interlock feature.
    • ATS has three switching position for options: common power ON, dual power OFF, standby power ON.
    • Small size, light weight, stable performance, reliable operation and easy to use.
    • Applied 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 AC
    Insulation Voltage 2500V one minute, no flicker and no breakdown for one minute
    Frequency 50/60Hz
    Delay Time 0-30s (Adjustable)
    Controller Rated Working Voltage 230V AC
    Mechanical Life 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
    Protection Class IP30
    Weight 31kg 34kg
    Dimensions See below


    630 Amps Automatic Transfer Switch Details

    ATS Dimensions (Unit: mm)

    630 Amp Automatic Transfer Switch 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.

    ATS Transfer Switch Wiring

    * 3P refers to 3-pole circuit breaker and 4P means 4-pole circuit breaker.
    * 24VDC (external) is supplied by the fire control center.

    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.
    Existing reviews of Automatic Transfer Switch, 3/4 Pole, 250/350 to 630 Amps
    Do you provide a 460v / 230v automatic transfer switch?
    Do you provide a 460v / 230v automatic transfer switch?
    From: Renee | Date: 16/12/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    No, max is 400V.
    Can the 630Amps automatic transfer switch be automatically connected?
    I have a question about the connection of your 630Amps automatic transfer switch. Do you need an additional connection in the electrical control connection to automatically proceed?
    From: Mary | Date: 18/03/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    This 630Amps automatic transfer switch can realize automatic connection without other connections.
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