Key Specifications Category DHSU1079-CT 250 A/50 mA Nominal voltage and frequency 230/400 V AC, 50/60 Hz Current measurement range 0–250 A Class 1 (tolerance: ± 1%) Electricity metering accuracy Earthing system Three-phase four-wire or three-phase three-wire 1200/2400/4800/9600/19,200/115,200 bit/s Baud rate (default: 9600 bit/s) –25 °...
Installing the DHSU1079-CT 250 A/50 mA 1. Install the Smart Power Sensor on the DIN 35 mm standard guide rail. 2. Press the Smart Power Sensor downwards onto the guide rail, and then push it in place along the guide rail.
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Each phase of Ua, Ub, and Uc in the Smart Power Sensor is connected with a fuse and a thermistor to prevent damage caused by external short circuits. Ua, Ub, and Uc do not need external fuse protection. Wiring Scenarios – Three-Phase Four-Wire Three-Phase Four-Wire 1.
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The CT direction must be consistent with the arrow direction as shown in the preceding figure. Display and Parameter Settings Display Display (Auto Loop) If no button is pressed for 60s, the backlight turns off. Auto loop switch time = 5s. Display Interface Description Display Interface...
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Display (Switch by Button " ") Display Interface Description Display Interface Description Comb. active Imp. active energy energy = 7654.33 kWh = 10000.0 kWh None parity, Exp. active 1 stop bit, energy Baud = 9600 = 2345.67 kWh bit/s Phase A 011 represents voltage address...
To modify the user password: Troubleshooting Symptom Cause Analysis Troubleshooting Method 1. Connect the cables correctly No display after 1. The cable connection is incorrect. (see wiring diagrams). power-on 2. The supply voltage is abnormal. 2. Supply the correct voltage based on the specifications.
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