1. Uvod
This manual provides comprehensive instructions for the installation, operation, and maintenance of the EARU Electric 3-Phase Voltage and Overcurrent Protector, Model EARU-1008. This device is designed to safeguard 3-phase electrical systems by continuously monitoring voltage and current, offering protection against over-voltage, pod voltage, overcurrent, and phase failure. It is suitable for industrial and commercial applications requiring reliable electrical monitoring and protection.
2. Varnostne informacije
OPOZORILO: Nevarnost električnega udara. Namestitev in vzdrževanje sme izvajati samo usposobljeno osebje.
- Pred namestitvijo ali servisiranjem naprave vedno izklopite napajanje.
- Poskrbite za pravilno ozemljitev, da preprečite električni udar.
- Verify all wiring connections are secure and correct according to the wiring diagram.
- Naprave ne uporabljajte, če je videti poškodovana.
- Upoštevajte vse lokalne in nacionalne električne predpise.
3. Izdelek je končanview
3.1. Ključne značilnosti
- Real-time 3-Phase Monitoring: Displays live voltage (L1, L2, L3) and current (L1, L2, L3) values.
- Celovita zaščita: Safeguards against over-voltage, pod voltage, overcurrent, and phase failure.
- Nastavljivi parametri: User-configurable settings for protection thresholds and recovery delays.
- Automatic Phase Failure Reset: Detects and automatically resets after phase anomalies.
- High-Visibility LED Display: Bright red LED for clear readings in various lighting conditions.
- Montaža na DIN-letev: Easy integration into standard electrical panels.
- Clear Terminal Labeling: Simplified installation with clearly marked input and output terminals.
3.2. Komponente in zaslon
The device features a clear LED display and intuitive control buttons for configuration. The display shows real-time voltage and current for each phase, along with indicators for protection status.

Slika 3.2.1: Spredaj view of the EARU Electric Voltage Protector, showing the LED display for L1, L2, L3 voltage and current, along with control buttons (SET, Up, Down, Power) and protection indicators. Terminal labels for N, L1, L2, L3 (IN and OUT) are also visible.

Slika 3.2.2: Perspektiva view highlighting the product features and the input/output terminals (N, L1, L2, L3) at the top and bottom of the device. This image emphasizes the physical layout and connection points.
4. Nastavitev in namestitev
4.1. Montaža
The EARU-1008 is designed for DIN rail mounting. Securely attach the device to a standard 35mm DIN rail within an electrical enclosure.
4.2. Povezave ožičenja
Refer to the wiring diagram below for correct connections. Ensure all connections are tight and properly insulated.
- Connect the incoming neutral (N) and phase lines (L1, L2, L3) to the 'IN' terminals.
- Connect the outgoing neutral (N) and phase lines (L1, L2, L3) to the 'OUT' terminals.
- Še enkrat preverite vse povezave, preden vključite napajanje.

Slika 4.2.1: Detailed wiring diagram for the EARU Electric Voltage Protector, showing connections for N, L1, L2, L3 for both input and output. The diagram illustrates how to integrate the protector into a 3-phase electrical system.
5. Navodila za uporabo
5.1. Začetni vklop
Once wired, apply power to the device. The LED display will illuminate, showing the real-time voltage and current for each phase.
5.2. Indikatorji zaslona
- V: voltage zaslon.
- A: Trenutni prikaz.
- moč: Output indication.
- >V: Nad-zvtage indikacija.
- <V: Pod-voltage indikacija.
- > jaz: Over-current indication.
5.3. Nastavitev parametrov
Use the 'SET' button to enter the configuration menu and the 'Up' and 'Down' keys to adjust values. Press 'SET' again to confirm and move to the next parameter. Hold 'SET' for 3 seconds to enter settings mode.

Slika 5.3.1: A detailed guide to setting various protection parameters on the EARU Electric Voltage Protector. This includes overvoltage, podzvtage, overcurrent, and recovery delay settings, with default values and adjustment ranges.
Key adjustable parameters include:
- Overvoltage Nastavitev zaščite: Range 230-300V (Default 270V).
- Overvoltage Protection Recover Setting: Range 225-295V (Default 265V).
- Overvoltage Recovery Delay: Range 1-500s (Default 30s).
- Overvoltage Trip Delay: Range 0.1-30s (Default 1.0s).
- Undervoltage Nastavitev zaščite: Range 140-210V (Default 170V).
- Undervoltage Protection Recover Setting: Range 145-215V (Default 175V).
- Undervoltage Trip Delay: Range 0.1-30s (Default 1.0s).
- Nastavitev nadtokovne zaščite: Range 1-63A (Default 30A).
- Overcurrent Trip Delay: Range 0.1-30s (Default 1.0s).
- voltage & Current Manual Error Calibration: Adjust for accuracy, range -9.5% to +9.5% (Default 0%).
- Power-on Delay Setting: Adjustable Range: 1-500S (Default: 10s).
5.4. Manual ON/OFF
The power button allows for manual switching of the device output.
6. Vzdrževanje
The EARU-1008 is designed for minimal maintenance. However, periodic checks are recommended:
- Napravo vzdržujte čisto in brez prahu in umazanije.
- Periodically inspect wiring connections for tightness and signs of wear.
- Zagotovite zadostno prezračevanje okoli naprave, da preprečite pregrevanje.
7. Odpravljanje težav
Če naprava ne deluje po pričakovanjih, upoštevajte naslednje:
- Brez zaslona/brez napajanja: Check the main power supply and all wiring connections.
- Protection Trip: Identify the active protection indicator (>V, <V, >I). Check the corresponding voltage or current levels. The device will automatically reset once conditions return to normal, based on configured recovery delays.
- Phase Failure: The device automatically detects and responds to phase failures, initiating a cut-off and auto-reset once the phase is restored.
- Nepravilni odčitki: If readings appear inaccurate, consider performing a manual error calibration as described in Section 5.3.

Slika 7.1: This image highlights the various protection features of the EARU Electric Voltage Protector, including phase failure cut-off, low voltage cut-off, high voltage cut-off, overload cut-off, phase sequence cut-off, and auto-reset on normal conditions. These are key aspects for troubleshooting protection trips.
8. Specifikacije
| Parameter | Vrednost |
|---|---|
| Znamka | EARU |
| Model | EARU-1008 |
| Ocenjena ponudba Voltage | AC 3*220V (N-L1/L2/L3) / 440V |
| Nazivna frekvenca | 50/60Hz |
| Over Current Protection Setting Range | 1-63A (Default 30A) |
| Preko Voltage Protection Setting Range | 230-300V (Default 270V) |
| Pod Voltage Protection Setting Range | 140-210V (Default 170V) |
| Dimenzije izdelka | 20 x 10 x 20 cm |
| Teža predmeta | 450 g |
| Vrsta namestitve | DIN tirnica |

Slika 8.1: This image provides a visual representation of the EARU Electric Voltage Protector's dimensions and a table of key technical specifications, including voltage, frequency, and protection ranges.
9. Garancija in podpora
9.1. Garancija
The EARU Electric Voltage Protector (Model EARU-1008) comes with a 1-letna garancija proizvajalca od datuma nakupa, ki krije napake v materialu in izdelavi pri normalni uporabi. Prosimo, shranite dokazilo o nakupu za uveljavljanje garancije.
9.2. Podpora strankam
For technical assistance, troubleshooting, or warranty inquiries, please contact EARU customer support through your retailer or the official EARU website. Provide your model number (EARU-1008) and a detailed description of the issue for efficient service.





