Three-phase DIN-rail bidirectional energy meter | 150 A CT | Ethernet / Modbus | LCD display | TAC4371CT

Technical Specifications

Model: TAC4371CT
Manufacturer / Brand: TAIYEDQ
Phases: 3-phase
Rated voltage: 230 V AC (L–N) / 400 V AC (L–L)
Measured voltage range: 30–300 V AC (L–N); 30–500 V AC (L–L)
Frequency: 45–65 Hz
Energy measurement range: Active energy: 0 – 99,999,999.999 kWh
Accuracy class: Class 1
Current transformer: 150 A
Interfaces: RS485 (2-wire); Ethernet
Protocols: Modbus RTU; Modbus TCP
Communication speed: 9600 bps (default)
Gateway function: Modbus TCP ↔ Modbus RTU
Display: Digital, backlit LCD
Dimensions: 72 × 100 × 66 mm
Operating temperature: -25 … +55 °C

Functions

Bidirectional energy measurement – allows accounting of both consumed and exported energy (e.g. with solar power systems)
Three-phase system monitoring – accurate measurement of energy and voltage on all three phases
Ethernet Modbus TCP communication – easy integration into BMS, SCADA, or EMS systems
RS485 Modbus RTU – classic solution for industrial automation
Gateway function – operates as a bridge between Modbus TCP and Modbus RTU networks
Backlit LCD display – clear visibility of readings even in low-light conditions

Applications

Residential user: Monitoring electricity consumption in three-phase installations, control of solar energy import/export, clear on-site readings without additional software
Engineer: Integration into SCADA / BMS / EMS systems, data acquisition via Modbus TCP / RTU, gateway function reduces the need for additional devices
Electrician: Quick DIN rail mounting, CT-based measurement allows safe installation without interrupting the circuit, reliable solution for residential and commercial sites

Advantages

Three-phase bidirectional measurement
Ethernet + RS485 in one device
Modbus TCP ↔ RTU gateway function
Accuracy class 1
Compact DIN rail design
Wide voltage and frequency range

Disadvantages

Requires current transformers (CT)
Designed for AC systems
Digital display only (no graphical analysis)