1. Réamhrá
This manual provides detailed instructions for the installation, operation, and maintenance of the QOLTEC 50900 Three Phase Electronic Energy Consumption Meter. This device is designed for measuring active energy consumption in three-phase, four-wire AC circuits. Please read this manual thoroughly before installation and use to ensure proper function and safety.
2. Faisnéis Sábháilteachta
RABHADH: Installation and maintenance of this device must be performed by qualified personnel only. Failure to follow these instructions can result in electric shock, fire, or serious injury.
- Always disconnect power before installing or servicing the meter.
- Ensure all wiring connections are secure and correct according to the wiring diagram.
- Do not operate the meter in environments exceeding its specified operating conditions.
- Do not open or modify the meter casing. Níl aon chodanna istigh ann ar féidir leis an úsáideoir iad a sheirbhísiú.
- Protect the meter from moisture, dust, and direct sunlight.
3. Táirge Tharview
The QOLTEC 50900 is a compact, DIN rail mountable electronic energy meter designed for accurate measurement of three-phase energy consumption. It features an LCD display for clear readings and a pulse output for remote monitoring.

Figure 3.1: QOLTEC 50900 Energy Meter showing dimensions (75mm x 92mm x 76mm) and key features like Three Phase Type, 230V Rated Voltage, 1.0 Precision Class, and LCD Display.
Príomhghnéithe:
- Three-phase, four-wire measurement
- LCD digital display for energy consumption (kWh)
- DIN rail mounting (4P width)
- High accuracy (Class 1.0)
- Pulse output (400imp/kWh)
- Oibriúcháin voltage: 3x230/400V
4. Sonraíochtaí
| Paraiméadar | Luach |
|---|---|
| Múnla | 50900 |
| Rátáilte Voltage | 3x230/400V AC |
| Reatha Rátáilte | 3x10(100)A |
| Minicíocht | 50 Hz |
| Rang Cruinneas | 1.0 |
| Taispeáin | LCD |
| Aschur Pulse | 400imp/kWh |
| Suiteáil | DIN Rail (4P) |
| Toisí (W x H x D) | 75 x 92 x 76 mm |
| Meáchan | 100 g |
| Ábhar | Aicrileach |
5. Socrú agus Suiteáil
The QOLTEC 50900 meter is designed for standard 35mm DIN rail mounting. Ensure the installation location is dry, well-ventilated, and free from excessive vibration or electromagnetic interference.
5.1 Gléasta
- Aimsigh ráille DIN 35mm oiriúnach laistigh de do phainéal leictreach.
- Align the meter's DIN rail clip with the rail.
- Press the meter firmly onto the rail until it clicks into place.

Figure 5.1: The QOLTEC 50900 meter securely mounted on a DIN rail, showing its compact form factor.
5.2 Naisc Sreangaithe
TÁBHACHTACH: All wiring must comply with local electrical codes and regulations. Ensure power is OFF before making any connections.
- Identify the input (IN) and output (OUT) terminals on the meter.
- Connect the incoming three-phase lines (L1, L2, L3) and Neutral (N) to the corresponding IN terminals (typically 5, 6, 7, 8).
- Connect the outgoing three-phase lines (L1, L2, L3) and Neutral (N) to the corresponding OUT terminals (typically 1, 2, 3, 4).
- Cinntigh go bhfuil na naisc uile daingean agus slán chun teagmhálacha scaoilte agus róthéamh a chosc.

Fíor 5.2: Taobh view of the meter showing the wiring diagram for input (IN) and output (OUT) connections for L1, L2, L3, and Neutral.

Fíor 5.3: Tosaigh view of the meter with its LCD display and a separate view of the terminal block for wiring connections.
6. Treoracha Oibriúcháin
Once properly installed and powered, the QOLTEC 50900 meter will automatically begin measuring energy consumption.
6.1 Taispeántas LCD
The LCD displays the total active energy consumption in kilowatt-hours (kWh). The display is continuous and does not require any button presses for basic reading.

Fíor 6.1: Gar-suas view of the LCD display showing an example energy reading in kWh.
6.2 Aschur Pulse
The meter features a pulse output (400imp/kWh) which can be used to connect to external monitoring systems for remote data collection. Refer to the external system's documentation for connection details.
7. Cothabháil
The QOLTEC 50900 energy meter is designed for maintenance-free operation under normal conditions.
- Glanadh: Use a soft, dry cloth to clean the meter's exterior. Do not use abrasive cleaners, solvents, or liquids that could enter the casing.
- Cigireacht: Periodically inspect the wiring connections for any signs of loosening or damage. Ensure the meter is free from dust accumulation.
- Coinníollacha Comhshaoil: Ensure the operating environment remains within the specified temperature and humidity ranges to prolong the meter's lifespan.
8. Fabhtcheartú
If you encounter issues with your QOLTEC 50900 meter, refer to the following common problems and solutions:
| Fadhb | Cúis Féideartha | Réiteach |
|---|---|---|
| No display/Meter not powering on | No power supply; Incorrect wiring; Blown fuse in circuit | Check power supply to the meter. Verify wiring connections. Check circuit breaker/fuse. |
| Incorrect energy reading | Incorrect wiring; Faulty meter | Verify wiring connections against the diagram. If wiring is correct, contact support. |
| Aschur cuisle nach bhfuil ag obair | Incorrect connection to external system; Faulty meter | Check pulse output wiring to the external system. Consult external system's manual. If issue persists, contact support. |
If the problem persists after attempting these solutions, please contact Qoltec customer support.
9. Barántas agus Tacaíocht
Qoltec products are manufactured to high-quality standards. For warranty information and technical support, please refer to the warranty card included with your product or visit the official Qoltec websuíomh. Coinnigh d’admháil ceannaigh mar chruthúnas ceannaigh.