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    Automatic Transfer Switch, 3/4 Pole, 6 to 63 Amps

    Low price dual-power Automatic Transfer Switch with high-breaking mini circuit breaker, selectable 3-pole or 4-pole, is available for rated operating current 6A, 10A, 16A, 20A, 25A, 32A, 40A, 63A, with three positions of normal power ON, dual OFF, standby power ON. Simple structure, easy operation and long service life.
    Free shipping
    Delivery date: 6-12 days


    • Suitable for power system with rated operating voltage 400V AC, 50Hz, ratings from 6 to 63 amps
    • Able to transfer between two power supplies as required
    • Overload, short circuit, under-voltage protection
    • Equipped with the function of emergency OFF, dual power OFF and output ON signal
    • Especially suitable for the illuminating circuits of commercial buildings, shopping mall, banks, and high-rise buildings where the fire protection are needed.


    • The automatic transfer switch consists of two miniature circuit breakers, motor, controller, and driving mechanism.
    • ATS has three positions for users’ choice, normal power ON, dual OFF, standby power ON.
    • The miniature circuit breaker with high-breaking capacity is used, and ATS has the same performances as MCB.
    • Simple structure, easy operation, no noise, small impact, and long service life.


    Model ATO-ZMQ2E
    Use Category AC-33iB
    Rated Operational Voltage Ue 220~400V AC
    Rated Operational Frequency 50/60Hz
    Rated Operational Current Ie (Optional) 6A, 10A, 16A, 20A, 25A, 32A, 40A, 63A
    Switching Control Voltage 220V AC
    Rated Insulation Voltage Ui 690V AC
    Transfer Action Time <3s
    Service Life  Electrical 1,500 Times
    Mechanical 6,000 Times
    Rated Short-circuit Making Capacity Icm 7.5kA
    Rated Ultimate Breaking Capacity Icu 5kA
    Miniature Circuit Breaker Type (Optional) C or D (Trip characteristic)
    Number of Poles (Optional) 3-Pole or 4-Pole
    ATS Controller Model (Optional) Terminal type Intelligent type
    Structure Integrated Integrated
    Operation Auto & Manual Auto, Manual and Dual OFF
    Monitoring Phase failure detection Three-phase under voltage, phase loss and phase failure detection
    Conversion Auto switch and auto reset Auto switch and auto reset
    Firefighting Linkage Control N/A Dual OFF with 12-24V DC input (Automatic cutout function for fire protection)
    Display Indicating lamp
    Environment Altitude < 2000m for the installation site
    Ambient Temperature -5℃-+40℃, the average less than +35℃ for 24 hours
    Relative Humidity ≤ 50% at the maximum ambient temperature of +40℃;
    Higher relative humidity is allowable under lower temperature, for example, RH could be 90% at +20℃.
    (Please note that the measures shall be taken for the condensation occasionally with the temperature change.)
    Standards Compliance to GB/T140848.11
    Pollution Degree Class 3
    Mounting Conditions It shall be mounted on the place where has no impact and vibration, no snow and rain.
    The upper terminals are connected to power source, and downside terminals are connected to the load.
    The sloping angle against the vertical shall be less than 5°.
    The outer magnetic field around the mounting site shall not exceed 5 times of earth field.
    Weight  2kg
    Dimensions  See below

    ATS Dimensions 6 - 63 amps

    Type External Dimensions Mounting Dimensions
    L W H L1 W1 Φd
    3-pole ATS 185 132 120 165 120 4
    4-pole ATS 220 132 120 200 120 4

    Selection Guide
    When placing an order of the automatic transfer switch, please inform us the following information clearly:
    1. Name and model of ATS
    2. Rated current of ATS
    3. Number of poles (3 or 4 poles)
    4. Controller model (Terminal type or intelligent type)
    5. Selection for miniature circuit breaker type (C or D)
    6. Quantity

    Tips: What's dual power automatic transfer switch?
    The automatic transfer switch (ATS) is a switch to transfer between two power sources. It is constituted by one or several change-over switching equipment and other necessary apparatuses. It is used to detect the power circuit. In addition, it changes over one or several load circuits from one power supply to the other power supply.
    For the use of dual power automatic transfer switch, briefly, it is connected with one utility power and one backup power. When the utility power suddenly fails, it will be transfer to the backup power supply automatically through the ATS (at the small load, the backup power supply can be supplied by the generator) to enable the equipment to operate normally. The most common application is the elevator, fire protection and monitoring. The condition is the same to the UPS uninterruptible power supply of the bank. However, its backup is the battery set. It is used in some factories and mines or units with loads of class I category and class II category.

    1. ATS with 3-pole circuit breaker
    3-pole ATS wiring diagram

    2. ATS with 4-pole circuit breaker
    4-pole ATS wiring diagram

    3. Terminal-type ATS output ends wiring diagram
    Terminal-type ATS output terminals wiring diagram

    4. Intelligent-type ATS output ends wiring diagram
    Intelligent type ATS output ends wiring diagram

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