ADW300 wireless meter is mainly used to measure three-phase active power in low-voltage network. It has the functions of RS485 communication and 470MHZ wireless communication. It is convenient for users to monitor, collect and manage electricity. It can be flexibly installed in the distribution box to realize the measurement, statistics and analysis of individual electric energy in different regions and loads.
Naming rules for ADW300 Wireless Metering Instruments
Functional Characteristics of ADW300 Wireless Metering Instrument
Function | Functional description |
Display mode | LCD (Field form) |
Electric energy metering | Active power metering (positive and reverse); four quadrant reactive power |
Electricity measurement | Voltage, current, power factor, frequency, active power, reactive power, apparent power |
Harmonic function | Total harmonic content and fractional harmonic content (2-31 times) |
Pulse output | Active Power Pulse Output |
Three-phase unbalance | Voltage and current unbalance |
Temperature measurement function | A, B, C, N four-way temperature measurement (optional T) |
DI /DO | 4DI/2DO(Selection of K) |
Residual electricity | 1-way Residual Electricity Measurement |
LED instruction | Pulse and other indication |
External CT | External open type CT(Selection of W) |
Communication | Infrared Communication |
| RS485 Interface (Optional C) |
470MHZ Wireless Transmission (Optional LR) | |
GPRS Wireless Communication (Optional 2G) | |
NB-IOT Wireless Communication (Selected NB) |
Electrical performance
Voltage input | Rated voltage | 3×220/380V,3×380V,3×57.7/100V,3×100V |
Reference frequency | 50Hz | |
Power consumption | <10VA or 2W(A),<0.5VA(B,C) | |
Current input | Input current | 3×1(6)A ,3×1.5(6)A(ADW300W) |
Start current | 4‰Ib(1class) | |
Power consumption | <2VA | |
Measurement performance | Standard | GB/T17215.321-2008,GB/T17215.322-2008 |
Active energy accuracy |
0.5S class | |
Temperature Accuracy | ±2℃ | |
pulse | pulse width | 80±20ms |
Impulse constant | 6400imp/kWh | |
Communication |
wireless | Transmission on 470MHz and maximum distance in open space is 1km |
Infrared communication | The constant baud rate is 1200 | |
Interface | RS485(A,B) | |
Connection mode | Shielded twisted pair conductors | |
Protocol | MODBUS-RTU,DL/T 645-07 |
Working environment conditions
Temperature range | Operating temperature | -25℃~55℃ |
Storage temperature | -40℃~70℃ | |
Humidity | ≤95%(No condensation) | |
Altitude | <2000m |
Outline dimensions and installation instructions
Wiring instructions
ADW300 and ADW300W can be connected by three-phase four-wire through current transformer, three-phase three-wire through current transformer, three-phase four-wire through voltage transformer and current transformer and three-phase three-wire through current transformer and voltage transformer.
ADW300 Wiring instructions
Main Functional Characteristics
It can measure all power parameters including voltage U, current I, active power P, reactive power Q, apparent power S, power factor PF, phase angle of voltage and current Φ, voltage unbalance, current unbalance, frequency F, 2-31st fractional harmonics, odd and even total harmonics and total harmonics. Voltage U reserved 1 decimal, frequency F reserved 2 decimal, current I reserved 3 decimal, power P reserved 4 decimal, phase angle Φ reserved 2 decimal, unbalance reserved 2 decimal.
Supporting 4-channel temperature measurement and residual current monitoring
Communication protocol
The instrument adopts MODBUS-RTU protocol or DL/645 protocol. For specific protocol formats, please refer to the relevant protocol standards.
Common errors check and solve
1 The meter do not light after powered, or one path of voltage indicator do not light.
Suggestion: Please turn the screw to ensure that the meter needle has been punctured and contacted with the cable inner
conductor cable.
2 Meter’s wireless communication failure
Suggestion: Please connect RS485 interface on the meter and USB convert to 485 serial port to read the parameters, and
confirm whether the parameters are the same as the upper terminal wireless configuration (channel and spread spectrum
factor). If different, please modify the meter’s wireless parameters and retest the master terminal after the same, and if
the same, it may be the meter and master terminal are in a relative long distance. It is too far to communicate or the scene
is seriously disturbed. We can try to use the external antenna at the same time, or consider the newly added wireless
master terminals, and then test it.
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