Introduction
The DIN-Rail Energy Meter is designed for residential and industrial energy metering, offering a cost-effective solution for power and energy measurement. It is suitable for replacing mechanical meters and is applicable in commercial, industrial, and utility settings. The meter supports middle and low voltage systems and is used for calculating household electricity bills and metering distribution feeders, transformers, generators, capacitor banks, and motors.

Specifications
The meter provides high precision measurements with accuracy levels of 0.2% for voltage and current, 0.5% for power, and 0.1% for power factor and frequency. It measures both consumed and generated active and reactive energy with varying accuracy levels.

Reference Standards
The device complies with several IEC standards, including IEC 61557-12:2007 for basic electricity, IEC 62053-22:2003 for active energy, and IEC 62053-23:2003 for reactive energy. It also meets EMC and LVD test standards.

Main Features
The DEM series meters are designed for DIN-Rail mounting and feature Modbus-RTU and pulse output communication for integration with data systems. They include a large LCD screen, RS485 communication, and support for both 50Hz and 60Hz systems. The meters offer optional multiple tariffs and prepaid billing functions, and are tamper-proof for revenue applications.

Ordering Information
The DEM series includes various models with different features such as built-in or external current transformers, harmonic distortion measurement, and time of use recording. Models vary in module width, phase number, and access method.

Technical Characteristics
Models differ in wiring methods, power supply requirements, display capacity, voltage rating, and measurement accuracy. They are designed to operate within a temperature range of -25°C to 55°C and have IP40 front panel protection.