shanghai fangqiu electric co.,ltd
shanghai fangqiu electric co.,ltd
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EM427 120/240V 10(100)A smart electricity kwh meter
single phase digital 120v din rail watt-hour meter 
specification :
| Electrical Characteristics | EM427 |
| Voltage(v) | 120/240v |
| Operational voltage | (70-130)%Un |
| Current(A) | |
| - Iref | 10A |
| -Itr | 1A |
| -Imax | 100A |
| -Imin | 0.5A |
| -Ist | 40mA |
| Power consumption of current circuits(VA) | < 0.01 |
| Power consumption of voltage circuits(W) | < 1.3W |
| General data | |
| Frequency (Hz) | 50/60 |
| Memory back-up | EEprom |
| Environment resistance to heat and fire | Terminal 960°C Cover 650°C |
| Enclosure material | |
| upper | ABS+PC |
| lower | ABS+PC |
| Pulse output | |
| Pulse width(ms) | 80 |
| Pulse constant(imp/kWh) | 1000 |
| LED | |
| LED constant | 1000 |
| Dimension | |
| Width (mm) | 72 |
| Height (mm) | 104.5 |
| Depth (mm) | 60 |
Dimension :
Wiring diagrams:
3 Wire with RS485: 2 wire with RS485 :
Main function:
Measuring Function:
Meter can measure import & export active energy , import & export reactive energy.
Display function :
Smart meter have two status: cycle display status andbutton press display .When pressing the button, User can set according their request. Button press will Backlight the LCD. Display cycle can be set within 5~20 seconds, The default is 5 seconds.
Electricity parameters measurement and monitoring :
Measure record and display voltage, current, power and power factors. error is not more than ±1%.
Communication Function :
With an infrared COM and a RS485 COM. Communication protocols fit Modbus RTU standard. RS485 communications transfer rates allow selected at 1200bps, 2400bps, 4800 bps and 9600bps, default is 9600bps.
Alarm function:
When the meter connect wire wrong example: current reverse, the meter will display , the ALARM led will be on.
Pulse output function :
Smart meter is equipped with a pulse output which is fully separated from the inside circuit. That generates pulses in proportion to the measured energy .include the testing pulse output of active energy and reactive energy. 8/ 11 Test pulse output contact (P+/P-).