1. Introducción
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. Información de seguridad
ADVERTENCIA: 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.
- Desconecte siempre la alimentación antes de instalar o realizar mantenimiento al medidor.
- Asegúrese de que todas las conexiones del cableado sean seguras y correctas según el diagrama de cableado.
- No opere el medidor en entornos que excedan sus condiciones de funcionamiento especificadas.
- Do not open or modify the meter casing. No hay piezas que el usuario pueda reparar en el interior.
- Protect the meter from moisture, dust, and direct sunlight.
3. Producto terminadoview
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.
Características 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 funcionamientotage: 3x230/400V
4. Especificaciones
| Parámetro | Valor |
|---|---|
| Modelo | 50900 |
| Vol nominaltage | 3x230/400 V CA |
| Corriente nominal | 3x10(100)A |
| Frecuencia | 50 Hz |
| Clase de precisión | 1.0 |
| Mostrar | Pantalla LCD |
| Salida de pulsos | 400imp / kWh |
| Instalación | DIN Rail (4P) |
| Dimensiones (An x Al x Pr) | 75 x 92 x 76 mm |
| Peso | 100 gramos |
| Material | Acrílico |
5. Configuración e instalación
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 Montaje
- Ubique un riel DIN de 35 mm adecuado dentro de su panel eléctrico.
- Align the meter's DIN rail clip with the rail.
- Presione el medidor firmemente sobre el riel hasta que encaje en su lugar.

Figure 5.1: The QOLTEC 50900 meter securely mounted on a DIN rail, showing its compact form factor.
5.2 conexiones de cableado
IMPORTANTE: 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).
- Asegúrese de que todas las conexiones estén firmes y seguras para evitar contactos sueltos y sobrecalentamiento.

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

Figura 5.3: Frente view of the meter with its LCD display and a separate view of the terminal block for wiring connections.
6. Instrucciones de funcionamiento
Once properly installed and powered, the QOLTEC 50900 meter will automatically begin measuring energy consumption.
Pantalla 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.

Figura 6.1: Primer plano view of the LCD display showing an example energy reading in kWh.
6.2 Salida de pulsos
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. Mantenimiento
The QOLTEC 50900 energy meter is designed for maintenance-free operation under normal conditions.
- Limpieza: Use a soft, dry cloth to clean the meter's exterior. Do not use abrasive cleaners, solvents, or liquids that could enter the casing.
- Inspección: Periodically inspect the wiring connections for any signs of loosening or damage. Ensure the meter is free from dust accumulation.
- Condiciones ambientales: Asegúrese de que el entorno operativo permanezca dentro de los rangos de temperatura y humedad especificados para prolongar la vida útil del medidor.
8. Solución de problemas
If you encounter issues with your QOLTEC 50900 meter, refer to the following common problems and solutions:
| Problema | Posible causa | Solución |
|---|---|---|
| No hay pantalla/El medidor no se enciende | 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. Garantía y soporte
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 webSitio. Conserve su recibo de compra como comprobante de compra.





