1. Увод
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. Безбедносне информације
УПОЗОРЕЊЕ: 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.
- Увек искључите напајање пре инсталирања или сервисирања бројила.
- 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 casinг. Унутра нема делова које корисник може сам да поправи.
- Protect the meter from moisture, dust, and direct sunlight.
3. Производ је готовview
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.
Кључне карактеристике:
- 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)
- Оператинг волtage: 3x230/400V
4. Спецификације
| Параметар | Валуе |
|---|---|
| Модел | 50900 |
| Ратед Волtage | 3x230/400V AC |
| Називна струја | 3x10(100)A |
| Фреквенција | 50Хз |
| Класа тачности | 1.0 |
| Дисплаи | ЛЦД |
| Пулсни излаз | 400имп/кВх |
| Инсталација | DIN Rail (4P) |
| Димензије (Ш к В к Д) | 75 к 92 к 76 мм |
| Тежина | 100 г |
| Материјал | Акрил |
5. Подешавање и инсталација
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 Монтажа
- Пронађите одговарајућу DIN шину од 35 мм унутар ваше електричне табле.
- Поравнајте DIN држач шине мерача са шином.
- Чврсто притисните мерач на шину док не кликне на своје место.

Figure 5.1: The QOLTEC 50900 meter securely mounted on a DIN rail, showing its compact form factor.
5.2 Ожичење
ВАЖНО: 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).
- Уверите се да су сви спојеви чврсти и безбедни како бисте спречили лабаве контакте и прегревање.

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

Слика 5.3: Предња страна view of the meter with its LCD display and a separate view of the terminal block for wiring connections.
6. Упутство за употребу
Once properly installed and powered, the QOLTEC 50900 meter will automatically begin measuring energy consumption.
КСНУМКС ЛЦД екран
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.

Слика 6.1: Крупни план view of the LCD display showing an example energy reading in kWh.
6.2 Пулсни излаз
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. Одржавање
The QOLTEC 50900 energy meter is designed for maintenance-free operation under normal conditions.
- Чишћење: Use a soft, dry cloth to clean the meter's exterior. Do not use abrasive cleaners, solvents, or liquids that could enter the casing.
- инспекција: Periodically inspect the wiring connections for any signs of loosening or damage. Ensure the meter is free from dust accumulation.
- Услови животне средине: Ensure the operating environment remains within the specified temperature and humidity ranges to prolong the meter's lifespan.
КСНУМКС. Решавање проблема
If you encounter issues with your QOLTEC 50900 meter, refer to the following common problems and solutions:
| Проблем | Могући узрок | Решење |
|---|---|---|
| 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. |
| Pulse output not working | 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. Гаранција и подршка
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 webсајт. Сачувајте рачун као доказ о куповини.