Siemens 7KT1666 3-Phase Energy Meter, 80A Direct Measurement, MID Certified, Modbus RTU, 2022

With a maximum current of 80 A and MID certification, the Siemens 7KT1666 energy meter delivers precise three-phase energy monitoring for commercial and industrial applications. This 2022-calibrated unit features a backlit LCD display, Modbus RTU communication, and an S0 pulse output for seamless integration into energy management systems. Its compact 4-module DIN rail design and self-powered operation simplify installation, while the Class B accuracy (equivalent to Class 1) ensures reliable billing-grade measurements.

Overview

The Siemens 7KT1666 is a direct-measuring three-phase energy meter designed for 3x230/400 V AC networks at 50/60 Hz. It accurately records active energy (kWh) and reactive energy (kVArh) with a single tariff, making it ideal for sub-metering, cost allocation, and energy efficiency projects. The meter's Modbus RTU interface enables real-time data access and remote monitoring, while the S0 pulse output allows connection to external devices such as PLCs or data loggers. Its backlit LCD provides clear visibility of energy consumption, even in low-light conditions.

What stands out

• MID certified for legal metrology, ensuring accuracy and compliance.
• Modbus RTU communication for easy integration with building management systems.
• Backlit LCD display for clear reading in any lighting.
• Compact 4-module (72 mm) DIN rail mounting saves panel space.
• Self-powered design eliminates the need for an auxiliary power supply.
• Wide operating temperature range from -25°C to +55°C.

Technical details

• Product type: Energy meter
• Phases: Three-phase
• Measurement type: Direct measurement
• Maximum current (Imax): 80 A
• Nominal voltage (Un): 3x230/400 V AC
• Frequency: 50/60 Hz
• Accuracy class (active energy): Class B (equivalent to Class 1)
• Communication interface: Modbus RTU
• Display type: LCD with backlight
• Energy measurement: Active energy (kWh), reactive energy (kVArh)
• Mounting type: DIN rail
• Number of modules: 4 TE (72 mm)
• Pulse output: Yes (S0 interface)
• Tariff support: Single tariff
• Year of calibration/manufacture: 2022
• Operating temperature: -25 to +55 °C
• Protection class: IP20
• Auxiliary voltage: Self-powered

Our verdict

The Siemens 7KT1666 combines high accuracy, robust communication, and easy installation in a compact package. Its MID certification and Modbus RTU support make it a dependable choice for professional energy monitoring and billing applications.