1. ບົດແນະນຳ
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your EARU Electric 3-Phase Auto Transfer Switch (ATS) - 440V 63A. Please read this manual thoroughly before installation and operation to ensure proper functionality and to prevent damage or injury.
The ATS is designed to provide uninterrupted power by automatically transferring loads between phases in a three-phase supply system. It features intelligent monitoring and protection against phase failure, over/under voltage, and overcurrent conditions, ensuring the stability and safety of connected equipment.
2. ຂໍ້ມູນຄວາມປອດໄພ
ຄຳເຕືອນ: ອັນຕະລາຍຈາກໄຟຟ້າຊອດ. ການຕິດຕັ້ງແລະການບໍລິການຄວນຈະຖືກປະຕິບັດໂດຍບຸກຄະລາກອນທີ່ມີຄຸນວຸດທິເທົ່ານັ້ນ.
- Always disconnect power before installing or servicing the ATS.
- ໃຫ້ແນ່ໃຈວ່າສາຍໄຟທັງຫມົດປະຕິບັດຕາມລະຫັດໄຟຟ້າທ້ອງຖິ່ນແລະແຫ່ງຊາດ.
- ຢືນຢັນ voltage ແລະການຈັດອັນດັບປະຈຸບັນກ່ອນທີ່ຈະເຊື່ອມຕໍ່ອຸປະກອນ.
- ຢ່າໃຊ້ອຸປະກອນຖ້າມັນປະກົດວ່າເສຍຫາຍ.
- Keep children away from electrical equipment.
3. ຜະລິດຕະພັນເກີນview
The EARU Electric 3-Phase ATS is an intelligent device that continuously monitors your three-phase power supply. It automatically switches single-phase loads to a healthy phase in case of a phase failure or imbalance, ensuring continuous operation of critical equipment.
3.1. ເນື້ອໃນຊຸດ
- 1 x EARU Electric 3-Phase Auto Transfer Switch (ATS)
3.2. Front Panel and Indicators

ລາຍລະອຽດຮູບພາບ: The front panel of the ATS features a digital display showing voltage for L1, L2, L3 phases and current for L1. Below the display are indicators for Power, Over-voltage (>V), Under-voltage (<V), and Over-current (>I). Control buttons include 'SET' (Menu key), 'Digit+/Up', 'Digit-/Down', and 'Manual ON/OFF' (Power button).
The digital display provides real-time voltage readings for each phase (L1, L2, L3) and the current for L1. Status indicators alert you to the operational state and any detected faults:
- ພະລັງງານ: Output indication.
- >V: ເກີນ-voltage ຕົວຊີ້ບອກ.
- <V: ລະດັບສຽງຕໍ່າtage ຕົວຊີ້ບອກ.
- > ຂ້ອຍ: Over-current indication.
Control buttons allow for parameter settings and manual operation:
- ກຳ ນົດ: Menu key for accessing settings.
- Digit+/Up: Increases value or navigates up in menus.
- Digit-/Down: Decreases value or navigates down in menus.
- ຄູ່ມືການເປີດ/ປິດ: Power button for manual control.
4. ການຕິດຕັ້ງແລະການຕິດຕັ້ງ
The ATS is designed for standard DIN rail mounting. Ensure sufficient space for ventilation and wiring connections.
4.1. ແຜນວາດສາຍໄຟ

ລາຍລະອຽດຮູບພາບ: A detailed wiring diagram illustrates the connection points for the ATS. The top terminals are labeled 'IN' with connections for N, L1, L2, L3. The bottom terminals are labeled 'OUT' with connections for N and L1. The diagram shows how to connect the three-phase input to the ATS and how a single-phase load (L1 and N) is connected to the output, with internal connections for phase monitoring and switching.
Follow the wiring diagram carefully. Incorrect wiring can lead to device malfunction or electrical hazards.
- Connect the incoming three-phase power supply (N, L1, L2, L3) to the 'IN' terminals.
- Connect the single-phase load (N, L1) to the 'OUT' terminals. The ATS will manage the phase transfer for the L1 output.
- Ensure all connections are secure and tightened to prevent loose contacts and overheating.
4.2. ການເປີດພະລັງງານເບື້ອງຕົ້ນ
After completing the wiring, restore power to the system. The ATS will power on and begin monitoring the phases. The digital display will show the current voltage readings for each phase. If all phases are stable and within acceptable limits, the ATS will provide power to the output.
5. ຄໍາແນະນໍາການດໍາເນີນງານ
The ATS operates automatically, but you can adjust its protection parameters to suit your specific requirements.
5.1. ຄວາມເຂົ້າໃຈກ່ຽວກັບການສະແດງຜົນແລະຕົວຊີ້ວັດ
The digital display continuously shows the real-time voltage of each phase (L1, L2, L3) and the current on L1. The indicator lights provide quick visual feedback on the device's status and any detected anomalies.

ລາຍລະອຽດຮູບພາບ: ໃກ້ຊິດ view of the ATS digital display. It shows '220V' for L1, L2, and L3, and '63.0A' for L1 current. Below these readings are small indicator icons for Power, >V (Over-voltage), <V (Under-voltage), and >I (Over-current).
5.2. Adjusting Protection Parameters
Use the 'SET' button to enter the parameter setting mode. Use the 'Digit+/Up' and 'Digit-/Down' buttons to navigate through settings and adjust values. Press 'SET' again to confirm and save changes.
| ພາລາມິເຕີ | ໄລຍະການຕັ້ງຄ່າ | ການຕັ້ງຄ່າເລີ່ມຕົ້ນ |
|---|---|---|
| Over Current Protection Setting Range | 1-63A/100A | 30A |
| Continuous Over Current Protection Times | 0-20 ເທື່ອ | ປິດ |
| ເກີນ Voltage Protection Setting Range | 230-300V | 270V |
| ເກີນ Voltage Protection Recover Setting Range | 225-295V | 265V |
| ພາຍໃຕ້ Voltage Protection Setting Range | 140-210V | 170V |
| ພາຍໃຕ້ Voltage Protection Recover Setting Range | 145-215V | 175V |
| ສະບັບtage & Current Protection Recover Delay | 1-500ວິ | 30ວິ |
5.3. Automatic Phase Transfer
The ATS automatically monitors the three input phases (L1, L2, L3). If a phase failure or significant voltage imbalance (over/under voltage) is detected on the currently supplying phase, the device will automatically transfer the single-phase output load to a healthy, stable phase within the same supply. This process is designed to be seamless and rapid, minimizing power interruption to connected equipment.
5.4. Automatic Recovery
Once the primary phase recovers and stabilizes, the ATS will intelligently switch the load back to the primary source, ensuring optimal power distribution and preventing equipment damage from unstable power. The recovery delay can be configured as per your operational needs.
6. ບໍາລຸງຮັກສາ
The EARU Electric ATS is designed for minimal maintenance. However, periodic checks are recommended to ensure optimal performance and longevity.
- ທໍາຄວາມສະອາດ: ຮັກສາອຸປະກອນໃຫ້ສະອາດ ແລະບໍ່ມີຂີ້ຝຸ່ນ ແລະສິ່ງເສດເຫຼືອ. ໃຊ້ຜ້າແຫ້ງ, ອ່ອນໆເພື່ອເຮັດຄວາມສະອາດ. ຢ່າໃຊ້ນໍ້າສະອາດ.
- ກວດສອບການເຊື່ອມຕໍ່: Periodically inspect all wiring connections to ensure they remain tight and free from corrosion.
- ເງື່ອນໄຂສິ່ງແວດລ້ອມ: ໃຫ້ແນ່ໃຈວ່າສະພາບແວດລ້ອມການດໍາເນີນງານຍັງຄົງຢູ່ພາຍໃນຂອບເຂດອຸນຫະພູມແລະຄວາມຊຸ່ມຊື່ນທີ່ກໍານົດໄວ້.
7. ການແກ້ໄຂບັນຫາ
If you encounter issues with your ATS, refer to the following common problems and solutions:
| ບັນຫາ | ສາເຫດທີ່ເປັນໄປໄດ້ | ການແກ້ໄຂ |
|---|---|---|
| ບໍ່ມີຜົນຜະລິດພະລັງງານ | No input power; all phases unstable; device in fault state. | Check incoming power supply. Verify all phases are stable. Check fault indicators. |
| ">V" or "<V" indicator lit | ເກີນ-voltage ຫຼື under-voltage detected on a phase. | ກວດສອບການປ້ອນຂໍ້ມູນ voltage stability. The ATS will automatically transfer if another phase is healthy. |
| ">I" indicator lit | Over-current detected on the output. | Reduce load on the output. Check for short circuits in the connected equipment. |
| Device not transferring phases | No healthy alternative phase available; transfer delay setting too long. | Ensure at least one healthy phase is present. Check and adjust the transfer delay settings. |
| ຈໍສະແດງຜົນດິຈິຕອນບໍ່ເຮັດວຽກ | No power to the device; internal fault. | Check power supply. If power is present and display is off, contact support. |
For issues not covered here, please contact EARU customer support.
8. ຂໍ້ມູນຈໍາເພາະ

ລາຍລະອຽດຮູບພາບ: This image displays the physical dimensions of the ATS (90mm width, 96mm height, 66mm depth) and a table of detailed technical specifications, including current rating, voltage, frequency, and various protection setting ranges.
| ຄຸນສົມບັດ | ລາຍລະອຽດ |
|---|---|
| ຍີ່ຫໍ້ | EARU |
| ໝາຍເລກຕົວແບບ | EARU-1012 |
| ຮູບແບບການເຮັດວຽກ | ປິດແລ້ວ |
| ການຈັດອັນດັບປັດຈຸບັນ | 63 Amps |
| ການດໍາເນີນງານ Voltage | 440 Volts (AC 3*220V (N-L1/L2/L3)) |
| ລະດັບຄວາມຖີ່ | 50/60Hz |
| ປະເພດການຕິດຕໍ່ | ເປີດປົກກະຕິ |
| ປະເພດຕົວເຊື່ອມຕໍ່ | Standard DIN rail 63A |
| ປະເພດວົງຈອນ | 4 ທາງ |
| ວັດສະດຸຕິດຕໍ່ | ທອງແດງ |
| Over Current Protection Setting Range | 1-63A/100A (Default 30A) |
| Continuous Over Current Protection Times | 0-20 Times (Default OFF) |
| ເກີນ Voltage Protection Setting Range | 230-300V (Default 270V) |
| ເກີນ Voltage Protection Recover Setting Range | 225-295V (Default 265V) |
| ພາຍໃຕ້ Voltage Protection Setting Range | 140-210V (Default 170V) |
| ພາຍໃຕ້ Voltage Protection Recover Setting Range | 145-215V (Default 175V) |
| ສະບັບtage & Current Protection Recover Delay | 1-500s (Default 30s) |
| ນ້ໍາຫນັກລາຍການ | 450 g |
| ຂະໜາດແພັກເກັດ | 15 x 15 x 15 cm |
| ປະເທດຕົ້ນກໍາເນີດ | ປະເທດອິນເດຍ |
9. ການຮັບປະກັນແລະການສະຫນັບສະຫນູນ
9.1. ຂໍ້ມູນການຮັບປະກັນ
The EARU Electric 3-Phase Auto Transfer Switch (ATS) comes with a ການຮັບປະກັນຂອງຜູ້ຜະລິດ 1 ປີ ຈາກວັນທີ່ຊື້. ການຮັບປະກັນນີ້ກວມເອົາຂໍ້ບົກພ່ອງຂອງວັດສະດຸແລະການເຮັດວຽກພາຍໃຕ້ການນໍາໃຊ້ປົກກະຕິ. ມັນບໍ່ກວມເອົາຄວາມເສຍຫາຍທີ່ເກີດຈາກການຕິດຕັ້ງທີ່ບໍ່ຖືກຕ້ອງ, ການໃຊ້ໃນທາງທີ່ຜິດ, ອຸປະຕິເຫດ, ຫຼືການດັດແກ້ທີ່ບໍ່ໄດ້ຮັບອະນຸຍາດ.
9.2. ການຊ່ວຍເຫຼືອລູກຄ້າ
For technical assistance, warranty claims, or any questions regarding your EARU Electric ATS, please contact your retailer or the manufacturer directly. Ensure you have your product model number (EARU-1012) and proof of purchase available when contacting support.





