Product Introduction

The TO-120-3D3Y6 is a high-accuracy multifunction meter designed for comprehensive power monitoring in modern energy systems. It provides real-time measurement of key electrical parameters including phase voltage, line voltage, current, power, frequency, power factor, and energy consumption. The meter supports advanced functions such as harmonic analysis, bidirectional active and reactive energy metering, time-of-use billing, demand monitoring, power quality analysis, waveform display, and event recording. Equipped with versatile I/O ports, the device enables local control and monitoring, while its integrated RS-485 port with MODBUS-RTU protocol ensures seamless integration into intelligent distribution systems and energy management platforms. With its robust performance and multifunctional capabilities, the TO-120-3D3Y6 serves as a direct replacement for conventional transducers, meters, and auxiliary units, making it ideal for use in energy management systems, power monitoring networks, industrial and mining facilities, public buildings, intelligent buildings, and switchboard power networks.

Product Data Sheet

Product Model: TO-120-3D3Y6

Measurement Parameters: Phase voltage, line voltage, current, power, energy, frequency, power factor

Connection Type: Three-phase four-wire / three-phase three-wire

Measurement Range: 380V/100V, 5A/1A

Overload Capacity: Continuous: 1.2 times rated; Instantaneous: 2 times rated

Power Consumption: <1VA

Frequency Range: 45–65Hz

Auxiliary Power Supply: AC85–265V, DC100–300V; consumption ≤5VA

Energy Pulse Output: Dry contact optical coupler output, fixed pulse width: 80ms ±20%

Communication: RS-485 port with physical layer isolation; MODBUS-RTU protocol; baud rate: 1200–38400 (default 9600); data format: N81, E81, O81 (default N81)

Analog Output: 0/4–20mA or 0–5/10V; programmable for transmitted item and scaling

Switching Output: Programmable remote/alarm output; capacity: 5A/250VAC, 5A/30VDC; configurable for alarm conditions, energy, switch input, analog input, or remote control

Remote Switch Input: Dry contact input; programmable to trigger alarm output

Measurement Accuracy: Energy: 0.5S; Frequency: ±0.1Hz; Active Power: 0.5S; Reactive Power: 1S

Display Type: Special LCD display board

Leakage Current Detection: Zero sequence current monitoring

Operating Environment: Temperature: -10°C to +55°C; Storage temperature: -20°C to +75°C; Relative humidity: <80% RH

Safety Isolation: Isolation between signal, power supply, and output terminals; insulation resistance: >5MΩ; dielectric withstand: AC 2kV between signal input, power supply, and output circuits