1. Pengenalan
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, bawah-voltage, overcurrent, and phase failure. It is suitable for industrial and commercial applications requiring reliable electrical monitoring and protection.
2. Maklumat Keselamatan
AMARAN: Bahaya kejutan elektrik. Pemasangan dan penyelenggaraan hendaklah hanya dilakukan oleh kakitangan yang berkelayakan.
- Sentiasa putuskan kuasa sebelum memasang atau menservis peranti.
- Pastikan pembumian yang betul untuk mengelakkan kejutan elektrik.
- Pastikan semua sambungan pendawaian adalah kukuh dan betul mengikut gambarajah pendawaian.
- Jangan kendalikan peranti jika ia kelihatan rosak.
- Patuhi semua kod elektrik tempatan dan nasional.
3. Produk Lebihview
3.1. Ciri-ciri Utama
- Real-time 3-Phase Monitoring: Displays live voltage (L1, L2, L3) and current (L1, L2, L3) values.
- Perlindungan Komprehensif: Perlindungan terhadap volum berlebihantage, bawah-voltage, overcurrent, and phase failure.
- Parameter Boleh Laras: 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.
- Pemasangan Rel DIN: Easy integration into standard electrical panels.
- Clear Terminal Labeling: Simplified installation with clearly marked input and output terminals.
3.2. Komponen dan Paparan
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.

Imej 3.2.1: Depan 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.

Imej 3.2.2: Satu perspektif 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. Persediaan dan Pemasangan
4.1. Pemasangan
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. Sambungan Pendawaian
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.
- Periksa semula semua sambungan sebelum menggunakan kuasa.

Imej 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. Arahan Operasi
5.1. Permulaan Kuasa
Once wired, apply power to the device. The LED display will illuminate, showing the real-time voltage and current for each phase.
5.2. Penunjuk Paparan
- V: Voltagpaparan e.
- A: Paparan semasa.
- Kuasa: Output indication.
- >V: Lebih-voltage petunjuk.
- <V: Di bawah voltage petunjuk.
- >saya: Over-current indication.
5.3. Menetapkan Parameter
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.

Imej 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 Tetapan Perlindungan: 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 Tetapan Perlindungan: Range 140-210V (Default 170V).
- Undervoltage Protection Recover Setting: Range 145-215V (Default 175V).
- Undervoltage Trip Delay: Range 0.1-30s (Default 1.0s).
- Tetapan Perlindungan Arus Lebihan: 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. Penyelenggaraan
The EARU-1008 is designed for minimal maintenance. However, periodic checks are recommended:
- Pastikan peranti bersih dan bebas daripada habuk dan serpihan.
- Periksa sambungan pendawaian secara berkala untuk kesesakan dan tanda-tanda haus.
- Pastikan pengudaraan yang mencukupi di sekitar peranti untuk mengelakkan terlalu panas.
7. Penyelesaian masalah
Jika peranti tidak berfungsi seperti yang dijangkakan, pertimbangkan perkara berikut:
- Tiada Paparan/Tiada Kuasa: 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.
- Bacaan yang salah: If readings appear inaccurate, consider performing a manual error calibration as described in Section 5.3.

Imej 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. Spesifikasi
| Parameter | Nilai |
|---|---|
| Jenama | EARU |
| Model | EARU-1008 |
| Bekalan Bernilai Voltage | AC 3*220V (N-L1/L2/L3) / 440V |
| Kekerapan Dinilai | 50/60Hz |
| Over Current Protection Setting Range | 1-63A (Default 30A) |
| Lebih Voltage Protection Setting Range | 230-300V (Default 270V) |
| Di bawah Voltage Protection Setting Range | 140-210V (Default 170V) |
| Dimensi Produk | 20 x 10 x 20 cm |
| Berat Barang | 450 g |
| Jenis Pemasangan | Rel DIN |

Imej 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. Waranti dan Sokongan
9.1. Waranti
The EARU Electric Voltage Protector (Model EARU-1008) comes with a Waranti pengilang selama 1 tahun dari tarikh pembelian, meliputi kecacatan bahan dan mutu kerja di bawah penggunaan biasa. Sila simpan bukti pembelian anda untuk tuntutan jaminan.
9.2. Sokongan Pelanggan
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.