Direct Three-Phase Energy Meter Circutor CEM-C21-T1

The direct three-phase energy meter Circutor CEM-C21-T1 (reference Q22411) is an advanced device designed to measure electrical energy consumption in three-phase systems of up to 65 A directly. This meter is ideal for residential, commercial, and industrial applications where precise energy consumption monitoring is required, optimising cost control and improving energy management efficiency. The CEM-C21-T1 is equipped with a 7-digit LCD display and advanced functionalities that allow the display of key electrical parameters and integration into monitoring systems via RS-485 communications.

Main Features:

• Direct measurement up to 65 A: The CEM-C21-T1 allows direct measurement of currents up to 65 A, eliminating the need for current transformers in lower capacity installations. This simplifies installation and reduces costs associated with implementing meters in three-phase networks.
• Rotating LCD display: The device features a 7-digit LCD display, which provides clear and simple visualisation of consumption data and other important electrical parameters. The display shows information in a rotating manner, facilitating access to different metrics such as voltage, current, active power (kWh), reactive power (kvarh) and power factor (PF) both per phase and at a three-phase level.
• Integrated RS-485 communication: The CEM-C21-T1 is equipped with an RS-485 communication port, allowing the meter to be integrated into remote energy management systems, such as PLC or BMS. This is ideal for monitoring and reporting energy consumption to external systems, facilitating centralised control of multiple meters in large installations.

Certification and Accuracy:

• MID certification and Class 1: This meter is certified under MID (Module B+D) regulations and Class 1 in active energy according to IEC 62053-21, ensuring precise active energy (kWh) measurement with a maximum error of 1%. For reactive energy (kvarh), the device complies with Class 2 according to IEC 62053-23.
• Compliance with international standards: The CEM-C21-T1 complies with international standards such as EN 50470 and IEC 62053, ensuring its reliability and compliance with European and international electrical energy measurement regulations.

Highlighted Technical Specifications:

• Three-phase system: Measures in three-phase networks with voltage ranges from 3x127/220V to 3x230/400V at 50/60 Hz.
• Nominal and maximum current: The meter measures nominal currents of 5 A with a range up to 65 A.
• Measurement of multiple parameters: The device allows visualisation and recording of different electrical parameters such as voltage, current, active and reactive power, energy consumed (kWh and kvarh), as well as the power factor.
• Pulse output: Includes a programmable pulse output in compliance with the DIN 43864 standard, enabling data export to external energy monitoring and control systems.

Additional Functions:

• Energy accumulation in case of incorrect wiring: The meter can continue to accumulate energy correctly, even in the event of incorrect wiring, minimising errors and ensuring data integrity.
• Incorrect wiring indicator: If a problem is detected in the cable connection, the CEM-C21-T1 indicates it on the display, allowing for a quick correction of the installation.
• Resettable partial counter: This meter includes a resettable partial counter function, facilitating consumption monitoring over specific periods, ideal for detailed energy usage analysis.

Robustness and Durability:

• IP51 protection rating: The CEM-C21-T1 is designed for indoor installations and features an IP51 protection when correctly installed, ensuring resistance to dust and minor impacts.
• High resistance to fluctuations: It withstands voltage fluctuations with an insulation voltage of 4 kV, allowing for safe operation in industrial or commercial environments with variable electrical conditions.
• Operating temperature: The device is designed to operate in a temperature range of -25°C to +70°C, making it suitable for a wide variety of environments.

Applications:

The CEM-C21-T1 is ideal for various applications, such as:

• Consumption monitoring in residential or commercial installations: Monitors electrical consumption in residential buildings, offices, and small businesses, providing accurate data for energy management.
• Cost control in industrial processes: Allows detailed monitoring of energy consumption by area or machine in industrial installations, helping to calculate consumption ratios per unit and optimise resource use.
• Billing verification: Acts as a redundant meter to verify the energy billed by electricity distributors, providing a second reference point for energy billing.