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General| Category | Measuring Instruments |
|---|---|
| Model | DTSU666-CT |
| Voltage Range | 0.7Un~1.3Un |
| Reference Frequency | 50Hz / 60Hz |
| Display | LCD |
| Relative Humidity | ≤ 95% |
| Installation | DIN Rail |
| Product Type | Three-Phase Electronic Energy Meter |
| Accuracy Class | 0.5S |
| Rated Voltage (Un) | 3×230/400V |
| Rated Current (In) | 5A |
| Measurement Parameters | Voltage, Current, Active Power, Reactive Power, Apparent Power, Power Factor, Frequency, Active Energy, Reactive Energy |
| Communication Interface | RS485 |
| Communication Protocol | Modbus-RTU |
| Operating Temperature | -25℃~+55℃ |
| Storage Temperature | -40°C ~ +70°C |
| Standards Compliance | IEC 62053-21 |
Details different models (DTSU666, DSSU666) with reference voltage, current, impulse constant, and accuracy class.
Details the limit values for active percentage error based on current range, power factor, and accuracy class.
Outlines the limit values for reactive percentage error for direct access and transformer-connected instruments.
Specifies the active and reactive percentage error limits for meters under imbalanced load conditions.
Explains how to set the current ratio (Ct) when using a transformer or direct connection.
Details how to set the voltage ratio (Pt) for transformer-connected or direct-connected voltage inputs.
Configures communication protocol switches (DI/T 645, parity, stop bits) and baud rates (1200-19200 bps).
Lists Modbus parameters, their addresses, data types, length, and read/write permissions.
Provides wiring diagrams for three-phase four-wire and three-phase three-wire direct connection methods.
Illustrates wiring for three-phase four-wire and three-phase three-wire systems using current transformers.
Provides a table for diagnosing common fault phenomena, their reasons, and elimination methods.
Lists potential causes like incorrect wiring or abnormal voltage and their solutions.
Covers issues with communication cable, address, baud rate, and protocol matching.
Addresses issues like reading secondary side data without transformer ratio or incorrect data frame analysis.
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