1. Rhagymadrodd
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, dan-cyftage, overcurrent, and phase failure. It is suitable for industrial and commercial applications requiring reliable electrical monitoring and protection.
2. Gwybodaeth Diogelwch
RHYBUDD: Perygl sioc drydanol. Dim ond personél cymwys ddylai wneud y gwaith gosod a chynnal a chadw.
- Datgysylltwch y pŵer bob amser cyn gosod neu wasanaethu'r ddyfais.
- Sicrhewch sylfaen gywir i atal sioc drydanol.
- Verify all wiring connections are secure and correct according to the wiring diagram.
- Peidiwch â gweithredu'r ddyfais os yw'n ymddangos ei bod wedi'i difrodi.
- Cadw at yr holl godau trydanol lleol a chenedlaethol.
3. Cynnyrch Drosview
3.1. Nodweddion Allweddol
- Real-time 3-Phase Monitoring: Displays live voltage (L1, L2, L3) and current (L1, L2, L3) values.
- Diogelu Cynhwysfawr: Safeguards against over-voltage, dan-cyftage, overcurrent, and phase failure.
- Paramedrau Addasadwy: 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.
- Mowntio Rheilffordd DIN: Easy integration into standard electrical panels.
- Clear Terminal Labeling: Simplified installation with clearly marked input and output terminals.
3.2. Cydrannau ac Arddangosfa
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.

Delwedd 3.2.1: Blaen 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.

Delwedd 3.2.2: Persbectif 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. Gosod a Gosod
4.1. Mowntio
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. Gwifrau Cysylltiadau
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.
- Gwiriwch bob cysylltiad cyn defnyddio pŵer.

Delwedd 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. Cyfarwyddiadau Gweithredu
5.1. Troi’r Pŵer Cychwynnol
Once wired, apply power to the device. The LED display will illuminate, showing the real-time voltage and current for each phase.
5.2. Dangosyddion Arddangos
- V: Cyftage arddangos.
- A: Arddangosfa gyfredol.
- Pwer: Output indication.
- >V: Gor-gyfroltage arwydd.
- <V: Dan-gyfroltage arwydd.
- > Fi: Over-current indication.
5.3. Gosod Paramedrau
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.

Delwedd 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.
Key adjustable parameters include:
- Overvoltage Gosodiad Amddiffyn: 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).
- Danddaeartage Gosodiad Amddiffyn: Range 140-210V (Default 170V).
- Danddaeartage Protection Recover Setting: Range 145-215V (Default 175V).
- Danddaeartage Trip Delay: Range 0.1-30s (Default 1.0s).
- Gosodiad Diogelu Overcurrent: Range 1-63A (Default 30A).
- Overcurrent Trip Delay: Range 0.1-30s (Default 1.0s).
- Cyftage & 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. cynnal
The EARU-1008 is designed for minimal maintenance. However, periodic checks are recommended:
- Cadwch y ddyfais yn lân ac yn rhydd o lwch a malurion.
- Periodically inspect wiring connections for tightness and signs of wear.
- Sicrhewch awyru digonol o amgylch y ddyfais i atal gorboethi.
7. Datrys Problemau
Os nad yw'r ddyfais yn gweithredu fel y disgwylir, ystyriwch y canlynol:
- Dim Arddangosfa/Dim Pŵer: Check the main power supply and all wiring connections.
- Taith Amddiffyn: 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.
- Darlleniadau anghywir: If readings appear inaccurate, consider performing a manual error calibration as described in Section 5.3.

Delwedd 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. manylebau
| Paramedr | Gwerth |
|---|---|
| Brand | EARU |
| Model | EARU-1008 |
| Rated Supply Voltage | AC 3*220V (N-L1/L2/L3) / 440V |
| Amlder â Gradd | 50/60Hz |
| Over Current Protection Setting Range | 1-63A (Default 30A) |
| Dros Voltage Protection Setting Range | 230-300V (Default 270V) |
| O dan Voltage Protection Setting Range | 140-210V (Default 170V) |
| Dimensiynau Cynnyrch | 20 x 10 x 20 cm |
| Pwysau Eitem | 450 g |
| Math Mowntio | Rheilffordd DIN |

Delwedd 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. Gwarant a Chefnogaeth
9.1. Gwarant
The EARU Electric Voltage Protector (Model EARU-1008) comes with a Gwarant gwneuthurwr 1 flynedd o ddyddiad y pryniant, gan gwmpasu diffygion mewn deunyddiau a chrefftwaith o dan ddefnydd arferol. Cadwch eich prawf prynu ar gyfer hawliadau gwarant.
9.2. Cefnogaeth i Gwsmeriaid
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.