1. Introduction
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. Consignes de sécurité
AVERTISSEMENT: 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.
- Coupez toujours l'alimentation électrique avant d'installer ou d'entretenir le compteur.
- Assurez-vous que tous les branchements électriques sont bien fixés et corrects conformément au schéma de câblage.
- N’utilisez pas le compteur dans des environnements dépassant ses conditions de fonctionnement spécifiées.
- Do not open or modify the meter casing. Il n'y a aucune pièce réparable par l'utilisateur à l'intérieur.
- Protect the meter from moisture, dust, and direct sunlight.
3. Produit terminéview
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.
Caractéristiques principales :
- 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)
- Vol. de fonctionnementtage: 3x230/400V
4. Spécifications
| Paramètre | Valeur |
|---|---|
| Modèle | 50900 |
| Vol évaluétage | 3 x 230/400 V CA |
| Courant nominal | 3x10(100)A |
| Fréquence | 50 Hz |
| Classe de précision | 1.0 |
| Afficher | Écran LCD |
| Sortie d'impulsion | 400 imp / kWh |
| Installation | DIN Rail (4P) |
| Dimensions (L x H x P) | 75 x 92 x 76 mm |
| Poids | 100 g |
| Matériel | Acrylique |
5. Configuration et installation
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 Montage
- Repérez un rail DIN de 35 mm adapté dans votre tableau électrique.
- Alignez le clip de fixation du compteur sur le rail DIN.
- Appuyez fermement le compteur sur le rail jusqu'à ce qu'il s'enclenche.

Figure 5.1: The QOLTEC 50900 meter securely mounted on a DIN rail, showing its compact form factor.
5.2 Connexions de câblage
IMPORTANT: 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).
- Assurez-vous que toutes les connexions sont bien serrées et sécurisées afin d'éviter les faux contacts et la surchauffe.

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

Figure 5.3 : Face avant view of the meter with its LCD display and a separate view of the terminal block for wiring connections.
6. Mode d'emploi
Once properly installed and powered, the QOLTEC 50900 meter will automatically begin measuring energy consumption.
Affichage LCD 6.1
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.

Figure 6.1 : Gros plan view of the LCD display showing an example energy reading in kWh.
6.2 Sortie d'impulsions
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. Entretien
The QOLTEC 50900 energy meter is designed for maintenance-free operation under normal conditions.
- Nettoyage: Use a soft, dry cloth to clean the meter's exterior. Do not use abrasive cleaners, solvents, or liquids that could enter the casing.
- Inspection: Periodically inspect the wiring connections for any signs of loosening or damage. Ensure the meter is free from dust accumulation.
- Conditions environnementales : Ensure the operating environment remains within the specified temperature and humidity ranges to prolong the meter's lifespan.
8. Dépannage
If you encounter issues with your QOLTEC 50900 meter, refer to the following common problems and solutions:
| Problème | Cause possible | Solution |
|---|---|---|
| Aucun affichage/Le compteur ne s'allume pas | 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. Garantie et assistance
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 webConsultez le site. Conservez votre reçu d'achat comme preuve d'achat.





