Product Introduction

This DIN Rail Meter is a single-phase two-wire active energy meter designed for accurate and reliable energy measurement in residential and light commercial applications. It offers multiple display options, including a standard 6+1 LCD display, a backlit LCD display (blue backlight), and a mechanical roller display, to meet different reading preferences. The meter supports rated currents of 5(45)A, with operational voltage options of 120V or 220V AC ±10%, and a frequency range of 50/60Hz. Built to IEC 62053-21 standards with Class 1 accuracy, it offers robust insulation capabilities, low internal power consumption, and long-term data retention of over 20 years during power outages. Some models feature a reset button for convenient data clearing, along with visual indicators including a green LED for power status and a red LED for load consumption and test pulse output. The meter also provides a passive pulse output for external monitoring. Housed in flame-retardant materials with an IP51 protection rating, it is suitable for DIN rail installation in distribution panels. Variants such as DDS238-1, DDS238-1 ZN, and DDS238-1 SW are available to suit specific application requirements.

Product Data Sheet

Product Type: Single-phase DIN Rail Energy Meter

Model Variants: DDS238-1 / DDS238-1 ZN / DDS238-1 SW

Display: 6+1 LCD (standard), 6+1 LCD with blue backlight, or mechanical roller display

Nominal Voltage (Un): 120V AC or 220V AC (optional)

Operational Voltage Range: 120V AC ±10% or 220V AC ±10%

Basic Current (Ib): 5A

Maximum Rated Current (Imax): 45A

Operational Current Range: 0.25A – 45A

Frequency Range: 50/60Hz

Accuracy Class: 1% (IEC 62053-21)

Internal Power Consumption: ≤1W / ≤10VA

Overcurrent Withstand: 960A for 0.01s

AC Voltage Withstand: 2kV for 1 minute

Impulse Voltage Withstand: 6kV – 1.2µs waveform

Test Output (Red LED): 2000 impulses per kWh (0.5Wh/imp)

Pulse Output (Pins): 2000 pulses per kWh (0.5Wh/imp)

Power Indicator: Green LED (meter connected and operational)

Load Indicator: Red LED (flashes during load operation)

Data Retention: >20 years after power failure

Operating Temperature: –10°C to +50°C

Storage Temperature: –30°C to +70°C

Operating Humidity: ≤75%

Storage Humidity: ≤95%

Protection Rating: IP51

Standard: IEC 62053-21

Material (Window/Case/Terminal Block/Cover): PC/PA flame-retardant

Installation: DIN Rail

Special Features: Optional reset button for data clearing; multiple display variants available

Warranty: 12 months