1. Entwodiksyon
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. Enfòmasyon sou Sekirite
AVÈTISMAN: Danje chòk elektrik. Se sèlman pèsonèl kalifye ki dwe fè enstalasyon ak antretyen.
- Always disconnect power before installing or servicing the ATS.
- Asire w ke tout fil elektrik yo konfòm ak kòd elektrik lokal ak nasyonal yo.
- Verify kòrèk voltage and current ratings before connecting the device.
- Pa sèvi ak aparèy la si li sanble domaje.
- Kenbe timoun yo lwen ekipman elektrik yo.
3. Pwodwi souview
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. Pake kontni
- 1 x EARU Electric 3-Phase Auto Transfer Switch (ATS)
3.2. Front Panel and Indicators

Deskripsyon imaj: 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:
- Pouvwa: Output indication.
- >V: Sou-voltage endikasyon.
- <V: Anba-voltage endikasyon.
- > mwen: Endikasyon twòp kouran.
Control buttons allow for parameter settings and manual operation:
- Mete: Menu key for accessing settings.
- Digit+/Up: Increases value or navigates up in menus.
- Digit-/Down: Decreases value or navigates down in menus.
- Manyèl ON/OFF: Power button for manual control.
4. Enstalasyon ak Enstalasyon
The ATS is designed for standard DIN rail mounting. Ensure sufficient space for ventilation and wiring connections.
4.1. Dyagram fil elektrik

Deskripsyon imaj: 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. Premye Limen
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. Operasyon Enstriksyon
The ATS operates automatically, but you can adjust its protection parameters to suit your specific requirements.
5.1. Understanding the Display and Indicators
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.

Deskripsyon imaj: Yon fèmen 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.
| Paramèt | Anviwònman Range | Anviwònman Default |
|---|---|---|
| Ranje Anviwònman Pwoteksyon Sou Kouran | 1-63A/100A | 30A |
| Tan Pwoteksyon Kontinyèl Sou Kouran | 0-20 fwa | OFF |
| Plis pase VoltagRanje Anviwònman Pwoteksyon e | 230-300V | 270V |
| Plis pase VoltagRanje Anviwònman Rekiperasyon Pwoteksyon e | 225-295V | 265V |
| Anba VoltagRanje Anviwònman Pwoteksyon e | 140-210V | 170V |
| Anba VoltagRanje Anviwònman Rekiperasyon Pwoteksyon e | 145-215V | 175V |
| Voltage & Pwoteksyon Kouran Reta Rekipere | 1-500s | 30s |
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. Antretyen
The EARU Electric ATS is designed for minimal maintenance. However, periodic checks are recommended to ensure optimal performance and longevity.
- Netwayaj: Kenbe aparèy la pwòp epi san pousyè ak debri. Sèvi ak yon twal sèk epi mou pou netwaye. Pa sèvi ak pwodui netwayaj likid.
- Tcheke Koneksyon: Periodically inspect all wiring connections to ensure they remain tight and free from corrosion.
- Kondisyon anviwònman: Asire w ke anviwònman operasyon an rete nan limit tanperati ak imidite espesifye yo.
NAN. Depanaj
If you encounter issues with your ATS, refer to the following common problems and solutions:
| Pwoblèm | Kòz posib | Solisyon |
|---|---|---|
| Pa gen pwodiksyon pouvwa | 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 | Sou-voltage oswa anba-voltage detected on a phase. | Tcheke opinyon 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. |
| Ekspozisyon dijital pa travay | 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. Espesifikasyon

Deskripsyon imaj: 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.
| Karakteristik | Detay |
|---|---|
| Mak | EARU |
| Nimewo Modèl | EARU-1012 |
| Mòd operasyon | ON-OFF |
| Rating aktyèl | 63 Amps |
| Opere Voltage | 440 Volts (AC 3*220V (N-L1/L2/L3)) |
| Rated Frekans | 50/60Hz |
| Kalite kontak | Nòmalman Louvri |
| Kalite Connector | Standard DIN rail 63A |
| Kalite Awondisman | 4-fason |
| Kontakte Materyèl | Kwiv |
| Ranje Anviwònman Pwoteksyon Sou Kouran | 1-63A/100A (30A pa defo) |
| Tan Pwoteksyon Kontinyèl Sou Kouran | 0-20 fwa (Default OFF) |
| Plis pase VoltagRanje Anviwònman Pwoteksyon e | 230-300V (Defo 270V) |
| Plis pase VoltagRanje Anviwònman Rekiperasyon Pwoteksyon e | 225-295V (Defo 265V) |
| Anba VoltagRanje Anviwònman Pwoteksyon e | 140-210V (Defo 170V) |
| Anba VoltagRanje Anviwònman Rekiperasyon Pwoteksyon e | 145-215V (Defo 175V) |
| Voltage & Pwoteksyon Kouran Reta Rekipere | 1-500s (30s pa defo) |
| Pwa atik | 450 g |
| Dimansyon pake | 15 x 15 x 15 cm |
| Peyi orijin | peyi Zend |
9. Garanti ak sipò
9.1. Enfòmasyon sou Garanti
The EARU Electric 3-Phase Auto Transfer Switch (ATS) comes with a Garanti manifakti 1 an apati dat acha a. Garanti sa a kouvri domaj nan materyèl ak nan fabrikasyon anba itilizasyon nòmal. Li pa kouvri domaj ki koze pa move enstalasyon, move itilizasyon, aksidan, oswa modifikasyon san otorizasyon.
9.2. Sipò pou Kliyan
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.





