General
This advanced metering device delivers high-precision measurement of single/three-phase voltage, three-phase current, active/reactive/apparent power, power factor, and frequency, featuring a digital tube display with local data query, programmable PT/CT ratio, RS-485 communication (Modbus-RTU protocol), and supports switch I/O plus analog output.
Technical Index Accuracy of Measurement
Voltage: level 0.5
Current :level 0.5
Active power: level 0.5
Reactive power: level 0.5
Power factor: level 0.5
Frequency:±0.02Hz
Signal Input
Connection Mode: signal phase two wires, three phase four wires, three phase three wires
Rated Voltage: AC 57.7V, AC 100V, AC 220V, AC 380V
Rated Current: AC 1A, AC5A
Overload Voltage:1.2 times(continued),2 times/1 second(instantaneous)
Overload Current: 1.2 times(continued), 10 times/5 second(instantaneous)
Accessory Power Supply
Working Range: AC/DC 80-270V, AC 220V, AC 380V,AC 100V
Power Consumption:<4VA
Function Module
Communication Interface:1 way RS-485 communication,modbus-RTU protocol
Baud Rate:2400~9600bps
Switch Input:2 ways
Switch Onput:2 ways(capacity:AC 250V/1A,DC 30V/5A)
Transmission Onput:1 ways(analog Onput:0/4~20mA or 0~5/10V)
Work environment
Working Temperature:-10℃~+55℃
Storage Temperature：-25℃~+70℃
Relative Humidity:≤93℃, no corrosive gas
Altitude:≤2500m
Safety
Insulation Resistance:>100MΩ
Ac Electric: AC 2KV
Emc Performance
ESD Electrostatic Discharge: class 4
Electrical Fast Transient Burst: class 4
Surge(impact): class 4
Overall dimensions
Frame Size(mm):120*120,96*96,80*80,72*72
Hole Size(mm):111*111,92*92,767*6,68*68
Technical Parameters
| Function | Measurement | Extended Function | Display | Hole Size (mm) |
| Single Phase | Single Phase | Three Phase | Three Phase | Frequency | Switching
Input | Switching
Output | Analog
Output | RS-485 | LED |
|
| Molel NO. |
| LST12-UIF | √ | √ | — | — | √ | — | — | — | 1 | √ | 111*111 |
| LST12-3UI | — | — | √ | √ | — | 2 | 2 | 3 | 1 | √ |
| LST96-UIF | √ | √ | — | — | √ | — | — | — | 1 | √ | 92*92 |
| LST96-3UI | — | — | √ | √ | — | 2 | 2 | 3 | 1 | √ |
| LST80-UIF | √ | √ | — | — | √ | — | — | — | 1 | √ | 76*76 |
| LST80-3UI | — | — | √ | √ | — | 2 | 2 | 3 | 1 | √ |
| LST72-UIF | √ | √ | — | — | √ | — | — | — | 1 | √ | 68*68 |
| LST72-3UI | — | — | √ | √ | — | 2 | 2 | 3 | 1 | √ |
| LST48-UIF | √ | √ | — | — | √ | — | — | — | 1 | √ | 45*45 |
LST96-UIF signal connection diagram
LST96-UIF three phase UIF combined
LST96-UIF terminal figure 1
LST96-UIF terminal figure 2
Yueqing Lovadon Electric Co., Ltd.
