# SUNGROW | SEM DTSU666-20 250A Three Phase Smart Meter indirect measurement (needs CT‘s) | UT000138

- **Brand:** Sungrow
- **SKU:** SUNGROW-CT-3X250A-333mV
- **GTIN:** 2000001313732
- **MPN:** ZTY6.176.533
- **Price:** 105.00 EUR
- **Availability:** In stock
- **Categories:** Accessories

Three-phase smart energy meter for photovoltaic monitoring with RS485 Modbus communication. Supports indirect current measurement using external CT sensors for solar energy systems.

The Sungrow SEM DTSU666-20 250A Three-Phase Smart Meter is designed for precise monitoring of electrical energy in photovoltaic and energy storage systems. It measures power consumption, grid import and export, and overall energy flow within residential and commercial solar installations.

This smart energy meter operates with external current transformers (CTs), enabling indirect current measurement for higher current applications. It provides accurate measurement of voltage, current, active power, reactive power, and energy consumption, allowing improved solar self-consumption and energy management.

### **Accurate Energy Measurement**

1. Measures voltage, current, active power, and energy consumption
2. Supports monitoring of grid import and export energy
3. Provides reliable measurement for photovoltaic systems
4. Supports current measurement via external CT sensors up to 250A

### **Smart Monitoring and Communication**

1. RS485 communication interface
2. Supports Modbus communication protocol
3. Compatible with Sungrow solar inverters
4. Enables real-time monitoring of system energy flow

### **Flexible CT-Based Measurement**

1. Supports external split-core current transformers
2. Designed for indirect current measurement installations
3. Supports CT measurement ranges up to 250A
4. Suitable for higher-power solar installations

### **Easy Installation**

1. DIN-rail mounted design
2. Compact installation inside electrical distribution panels
3. Simple integration into photovoltaic monitoring systems
4. Suitable for residential and commercial installations

## Specifications

| Spec | Value |
| --- | --- |
| Weight | 0.80 kg |
| Cooling | Natural |
| Display | LCD (front panel) |
| Voltage | 50 – 280 V (L-N) / 85 – 485 V (L-L) |
| Grid tie | Yes, with compatible inverter |
| Warranty | 120 months |
| Frequency | 50/60 Hz |
| Dimensions | 72 × 118 × 65.5 mm |
| Monitoring | Energy import / export monitoring |
| Phase type | three-phase |
| Noise level | 0 dB |
| Communication | RS485, 9600 bps |
| Compatibility | Works with Sungrow systems using DTSU666-20 + 333 mV CTs (100 A / 250 A) |
| Input voltage | 230 / 400 V AC |
| Certifications | EN61326-1; EN61010-1 |
| Max pv voltage | CT measurement up to 250 A |
| Mounting options | DIN-rail clip |
| Installation type | DIN-rail (35 mm) |
| Protection rating | IP20 |
| Operating temperature | −25 °C to +70 °C |