dual power automatic transfer switch is applied to power system of 50Hz, rated voltage 400V, rated current 125A. The product can transfer between two power supply according to the requirements. The product is provided with function of overload, short circuit, and closing signal output. It is especially used for office building, shopping mall, bank, high-rise building and other lighting lines.

1.ATSE can be installed in power control cabinet directly. Users can wire after ATSE installation (refer to design and use). As per current value use suitable conductor to connect the mains side (top terminal) and load side (bottom terminal) of MCB of normal electric power and standby electric power. In-phase parallel connection at load side, and ensure the phase sequence of normal electric power and standby electric power must be accordant (Wire as per A,B,C,N sequence). For 3 poles ATSE should add one conductor with section not less than 0.3mm2  to connect the neuter line of power supply correctly, thus ATSE can work properly. For 4 poles or 2 poles ATSE, N pole of normal electric power and standby electric power should be connected to N pole of MCB respectively. In addition, when install ATSE please ground reliably at grounding mark.

2.Use

1) Normal use, please set the switch of controller at Automatic Function. Under Auto working the controller of ATSE monitor normal electric power and standby electric power and display running status of ATSE. When Normal power cut, no voltage, failure, ATSE will transfer load automatically from normal power to standby power. If normal power get right, ATSE will transfer load automatically from standby power to normal power. The luminous diode on switch panel indicate switch off situation.
  2) If you don't adopt automatic transfer or need other manual operation please set the controller at manual. Under manual operation the controller stop work, and manual operation can make the breaker on off, and the switch doesn't transfer automatically.
  3) When ATSE is short circuit or over load, The MCB of ATSE will protect tripping. If power display normally the handle of MCB is switching on. If the MCB has protected tripping users should set at manual and operate the switch to dual separating brake  by hand, and check the reason of trip. After trouble clearing please set the controller at auto again to operate.
  4) When ATSE transfer to auto from manual, if normal and standby power are normal ATSE will prior connect normal power to load (even if load connected standby power ago)

3. Matters need attention

When users test or operate please follow relative rules and pay attention to the following matters to ensure use our ATSE correctly.
1)Neutral conductor N can't be connected in wrong way, must connect reliably, otherwise ATSE can't operate properly, even burn controller and motor.
2)The protective grounding of ATSE must be connected reliably to ensure safety.
3)Detection sampling signal for controller work power and main power supply is taken from Power supply side of main circuit, and work power of auxiliary connection terminal used for connect indicator is taken from main circuit, so can't have voltage test between spare terminals (unless dismantle the secondary wires). Can have power frequency voltage test between main circuit and shell or between secondary auxiliary terminals and shell.

4. Simple troubleshooting

When users find fault can request professional to test and deal with. Keep Away for Safety when operate. Or contact our Specialized Service Departments.
1)Double Power are both switched on, but ATSE can't transfer automatically
1 Check Auto/manual should be in automatic position.
2 Check if incoming line is correct or not, if phase sequence is accordance or not, and wiring is solid and reliable or not.
3 Check if the fuse is burned on not.
2)Double power are both switched on, ATSE standby power is switching on.
4 Check if normal power incoming line has voltage or not.
5 Check Commonly used insurance.
6 Check if external light is connected in wrong way or not.

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