1. Introduksjon
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, under voltage, overcurrent, and phase failure. It is suitable for industrial and commercial applications requiring reliable electrical monitoring and protection.
2. Sikkerhetsinformasjon
ADVARSEL: Fare for elektrisk støt. Installasjon og vedlikehold skal kun utføres av kvalifisert personell.
- Koble alltid fra strømmen før du installerer eller utfører service på enheten.
- Sørg for riktig jording for å unngå elektrisk støt.
- Kontroller at alle ledningstilkoblinger er sikre og korrekte i henhold til koblingsskjemaet.
- Ikke bruk enheten hvis den ser ut til å være skadet.
- Overhold alle lokale og nasjonale elektriske forskrifter.
3. Produktet er overview
3.1. Nøkkelfunksjoner
- Real-time 3-Phase Monitoring: Displays live voltage (L1, L2, L3) and current (L1, L2, L3) values.
- Omfattende beskyttelse: Sikring mot overvolumtage, under voltage, overcurrent, and phase failure.
- Justerbare parametere: 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.
- DIN-skinnemontering: Easy integration into standard electrical panels.
- Clear Terminal Labeling: Simplified installation with clearly marked input and output terminals.
3.2. Komponenter og skjerm
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.

Bilde 3.2.1: Front 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.

Bilde 3.2.2: Et perspektiv 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. Oppsett og installasjon
4.1. Montering
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. Kablingstilkoblinger
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.
- Dobbeltsjekk alle tilkoblinger før du kobler til strøm.

Bilde 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. Bruksanvisning
5.1. Første oppstart
Once wired, apply power to the device. The LED display will illuminate, showing the real-time voltage og strøm for hver fase.
5.2. Vis indikatorer
- V: Voltage display.
- A: Gjeldende visning.
- Makt: Output indication.
- >V: Over-voltage indikasjon.
- <V: Under-voltage indikasjon.
- >jeg: Over-current indication.
5.3. Innstilling av parametere
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.

Bilde 5.3.1: A detailed guide to setting various protection parameters on the EARU Electric Voltage Protector. This includes overvoltage, undervoltage, overcurrent, and recovery delay settings, with default values and adjustment ranges.
Viktige justerbare parametere inkluderer:
- Overvoltage Beskyttelsesinnstilling: Range 230-300V (Default 270V).
- Overvoltage Protection Recover Setting: Range 225-295V (Default 265V).
- Overvoltage Recovery Delay: Range 1-500s (Default 30s).
- Overvoltage Tripforsinkelse: Range 0.1-30s (Default 1.0s).
- Undervoltage Beskyttelsesinnstilling: Range 140-210V (Default 170V).
- Undervoltage Protection Recover Setting: Range 145-215V (Default 175V).
- Undervoltage Tripforsinkelse: Range 0.1-30s (Default 1.0s).
- Overcurrent Protection Setting: 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. Manuell PÅ/AV
The power button allows for manual switching of the device output.
6. Vedlikehold
The EARU-1008 is designed for minimal maintenance. However, periodic checks are recommended:
- Hold enheten ren og fri for støv og rusk.
- Periodically inspect wiring connections for tightness and signs of wear.
- Sørg for tilstrekkelig ventilasjon rundt enheten for å forhindre overoppheting.
7. Feilsøking
Hvis enheten ikke fungerer som forventet, bør du vurdere følgende:
- Ingen skjerm/ingen strøm: 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.
- Feil avlesning: If readings appear inaccurate, consider performing a manual error calibration as described in Section 5.3.

Bilde 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. Spesifikasjoner
| Parameter | Verdi |
|---|---|
| Merke | EARU |
| Modell | EARU-1008 |
| Rated Supply Voltage | AC 3*220V (N-L1/L2/L3) / 440V |
| Nominell frekvens | 50/60 Hz |
| Innstillingsområde for overstrømsbeskyttelse | 1-63A (Default 30A) |
| Over Voltage Beskyttelsesinnstillingsområde | 230–300 V (standard 270 V) |
| Under Voltage Beskyttelsesinnstillingsområde | 140–210 V (standard 170 V) |
| Produktdimensjoner | 20 x 10 x 20 cm |
| Varevekt | 450 g |
| Monteringstype | DIN-skinne |

Bilde 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. Garanti og støtte
9.1. Garanti
The EARU Electric Voltage Protector (Model EARU-1008) comes with a 1 års produsentgaranti fra kjøpsdatoen, som dekker material- og produksjonsfeil ved normal bruk. Vennligst ta vare på kjøpsbeviset for garantikrav.
9.2. Kundestøtte
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.