SOLAX Energy Meter Chint DTSU666 (3Phase)
SOLAX Energy Meter Chint DTSU666 (3Phase)
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The DTSU666 (Solax/CHNT) is a three-phase DIN rail energy/power meter from CHNT, with bidirectional measurement capabilities (both energy import and export).
It is intended for use in electrical installations where both energy consumption and feed-in (e.g. solar energy systems) need to be measured, and can be integrated into energy management systems via RS‑485 / Modbus communication.
It is certified to MID standards, making it suitable for billing or commercial applications in markets where MID approval is required.
Technical specifications
Here are the main technical features of the DTSU666:
| Aspect | Specification / remark |
|---|---|
| Voltage range | About 0.8 × Un to 1.15 × Un |
| Current range | Direct measurement: 0.25 A … 5 A (up to 80 A) |
| Accuracy class | Class B / 1.0 for energy (kWh) |
| Energy constant | 800 pulses per kWh |
| Communication | RS‑485 (Modbus‑RTU) |
| Baud rates | 1200, 2400, 4800, 9600 (standard), 19,200 bps |
| Display / Interface | LCD display with backlight |
| Measured values | Active energy (kWh), reactive energy (kvarh), voltage (Vrms), current (Irms), power (kW, kVA, kvar), frequency, power factor, etc. |
| Pulse gait | Yes — for external measurement or connection to monitoring systems |
| Ambient temperature | Operating: -25 °C to +55 °C, Storage: -40 °C to +70 °C |
| Degree of protection | IP20 (housing) |
| Dimensions & weight | Approx. 72 × 100 × 65 mm, weight approx. 0.33 kg |
Features & Applications
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Two-way measurement : the meter can measure both import (consumption) and export (e.g. when returning electricity from solar panels).
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Modbus integration : Through the RS‑485 port and the Modbus-RTU protocol, the meter can communicate with energy management systems, inverters and monitoring software.
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DIN rail mounting : designed for mounting in electrical distribution boxes on a standard DIN rail (TH‑35 mm)
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LCD display : the meter shows real-time voltages, currents, powers, energies, etc., with backlight for easy reading even in low light.
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Pulse signals : The pulse output can be used to connect external systems or loggers and further process energy data.
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Applications : Suitable for use in residential, commercial, and solar energy systems where accurate metering and feed-in recording is required.
