1. Муқаддима
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. Маълумот оид ба бехатарӣ
ОГОҲӢ: Хатари зарбаи барқ. Насб ва хидматрасонӣ бояд танҳо аз ҷониби кормандони соҳибихтисос анҷом дода шавад.
- Always disconnect power before installing or servicing the ATS.
- Боварӣ ҳосил кунед, ки ҳамаи ноқилҳо ба кодексҳои барқии маҳаллӣ ва миллӣ мувофиқат мекунанд.
- Тасдиқи ҷилди дурустtage and current ratings before connecting the device.
- Агар дастгоҳ осеб дида бошад, онро истифода набаред.
- Keep children away from electrical equipment.
3. Маҳсулот ба охир расидview
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. Мундариҷаи баста
- 1 x EARU Electric 3-Phase Auto Transfer Switch (ATS)
3.2. Front Panel and Indicators

Тавсифи тасвир: 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:
- Қувва: Output indication.
- >V: Ҳаҷми барзиёдtagд нишондод.
- <V: Зери ҳаҷмиtagд нишондод.
- > Ман: Over-current indication.
Control buttons allow for parameter settings and manual operation:
- Муқаррар: Menu key for accessing settings.
- Digit+/Up: Increases value or navigates up in menus.
- Digit-/Down: Decreases value or navigates down in menus.
- Дастӣ фурӯзон/хомӯш: Power button for manual control.
4. Танзим ва насб
The ATS is designed for standard DIN rail mounting. Ensure sufficient space for ventilation and wiring connections.
4.1. Диаграммаи васлкунӣ

Тавсифи тасвир: 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. Таъмини ибтидоӣ
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. Дастурҳои истифодабарӣ
The ATS operates automatically, but you can adjust its protection parameters to suit your specific requirements.
5.1. Фаҳмидани дисплей ва нишондиҳандаҳо
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.

Тавсифи тасвир: Нақшаи наздик 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.
| Параметр | Диапазони танзим | Танзимоти пешфарз |
|---|---|---|
| Over Current Protection Setting Range | 1-63А/100А | 30А |
| Continuous Over Current Protection Times | 0-20 маротиба | ХОМӮШ |
| Беш аз ҷtage Protection Setting Range | 230-300В | 270В |
| Беш аз ҷtage Protection Recover Setting Range | 225-295В | 265В |
| Зери ҷилдиtage Protection Setting Range | 140-210В | 170В |
| Зери ҷилдиtage Protection Recover Setting Range | 145-215В | 175В |
| Ҷилдиtage & Current Protection Recover Delay | 1-500с | 30с |
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. Нигоҳдорӣ
The EARU Electric ATS is designed for minimal maintenance. However, periodic checks are recommended to ensure optimal performance and longevity.
- Тозакунӣ: Дастгоҳро тоза ва аз чангу хошок тоза нигоҳ доред. Барои тоза кардан матои хушк ва мулоимро истифода баред. Моеъҳои тозакунандаро истифода набаред.
- Санҷишҳои пайвастшавӣ: Periodically inspect all wiring connections to ensure they remain tight and free from corrosion.
- Шароити экологӣ: Боварӣ ҳосил кунед, ки муҳити корӣ дар ҳудуди муқарраршудаи ҳарорат ва намӣ боқӣ мемонад.
7. Баррасии мушкилот
If you encounter issues with your ATS, refer to the following common problems and solutions:
| Мушкилот | Сабаби эҳтимолӣ | Ҳалли |
|---|---|---|
| Не баромади қувваи барқ | 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 | Ҳаҷми барзиёдtagд ё зери-ҷилдtage detected on a phase. | Ҳаҷми вурудро тафтиш кунедtage 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. |
| Намоиши рақамӣ кор намекунад | 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. Мушаххасоти

Тавсифи тасвир: 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.
| Хусусият | Тафсилот |
|---|---|
| Бренд | EARU |
| Рақами модел | EARU-1012 |
| Режими амалиёт | ХОМӮШ НАБУД |
| Рейтинги ҷорӣ | 63 Amps |
| Ҷилди амалиётӣtage | 440 Volts (AC 3*220V (N-L1/L2/L3)) |
| Басомади номиналӣ | 50/60Гц |
| Навъи тамос | Одатан кушода |
| Навъи пайвасткунанда | Standard DIN rail 63A |
| Навъи схема | 4-роҳ |
| Маводи тамос | Мис |
| Over Current Protection Setting Range | 1-63A/100A (Default 30A) |
| Continuous Over Current Protection Times | 0-20 Times (Default OFF) |
| Беш аз ҷtage Protection Setting Range | 230-300V (Default 270V) |
| Беш аз ҷtage Protection Recover Setting Range | 225-295V (Default 265V) |
| Зери ҷилдиtage Protection Setting Range | 140-210V (Default 170V) |
| Зери ҷилдиtage Protection Recover Setting Range | 145-215V (Default 175V) |
| Ҷилдиtage & Current Protection Recover Delay | 1-500s (Default 30s) |
| Вазни ашё | 450 гр |
| Андозаҳои бастаҳо | 15 х 15 х 15 см |
| Кишвари аслӣ | Ҳиндустон |
9. Кафолат ва дастгирӣ
9.1. Маълумот дар бораи кафолат
The EARU Electric 3-Phase Auto Transfer Switch (ATS) comes with a Кафолати 1-солаи Истеҳсолкунанда аз рӯзи харид. Ин кафолат нуқсонҳои мавод ва коркардро ҳангоми истифодаи муқаррарӣ фаро мегирад. Он зарареро, ки дар натиҷаи насби нодуруст, истифодаи нодуруст, садамаҳо ё тағироти беиҷозат расонида шудааст, фаро намегирад.
9.2. Дастгирии муштариён
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.





