The CHINT DDSU666-H is a single-phase smart energy meter (power sensor) designed for accurate monitoring of electrical parameters in residential, commercial, and photovoltaic systems.

Widely used in PV systems (especially for inverter integration and energy management), this device provides real-time measurement of power consumption and energy flow, enabling advanced monitoring and control.

Its compact DIN rail design, combined with RS485 Modbus communication, makes it ideal for integration into electrical panels and smart energy systems.

⚙️ Technical Specifications

• Brand: CHINT
• Model: DDSU666-H
• Type: Smart Power Sensor / Energy Meter
• Phase: Single-phase

🔌 Electrical Parameters

• Nominal voltage: 230 V AC
• Current:
  • Direct: up to 100 A
  • Measurement output: 40 mA
• Frequency: 50 / 60 Hz
• Accuracy class: Class 1

🔗 Communication & Interfaces

• RS485 communication (Modbus RTU)
• Terminals for communication: A / B (RS485)
• Suitable for integration with:
  ✔ Inverters
  ✔ Energy management systems
  ✔ PLC / SCADA systems

🖥️ User Interface

• Front LCD display for real-time readings
• Navigation button for menu control
• LED indicator for pulse/output status

🔌 Connections

• Power input terminals (L / N)
• Measurement terminals (direct connection up to 100A)
• RS485 terminals for communication

🛠 Installation

• Mounting on DIN rail (electrical panel)
• Direct wiring (no external CT required up to 100A)
• Suitable for integration in distribution boards and PV systems

🏭 Applications

Ideal for:

✔ Photovoltaic systems (inverter monitoring & export control)
✔ Energy consumption monitoring
✔ Smart home and energy management systems
✔ Industrial and commercial electrical panels
✔ Grid interaction and load analysis

📦 Condition

• Used product
• Condition as shown in images
• Functional verification recommended before installation

🚀 Commercial Summary

The CHINT DDSU666-H is a reliable and widely used smart energy meter for single-phase systems, featuring RS485 Modbus communication and direct measurement up to 100A.

It is an excellent solution for photovoltaic monitoring, energy management, and smart electrical systems, combining accuracy, simplicity, and industrial reliability.