60A 90-300V TUYA Single Phase Wi-Fi Smart Energy Meter Kwh Monitoring Circuit breaker Timer with voltage current protection RS485

FEATURES:

• Remote control at anytime from anywhere
• Schedule/Timer/loop timer
• Energy monitoring,Set power unit price ,can caculate house device power consumption，Download data to sheet
• Preset power/current/voltage threshold values by app, Once the real-time power/current/voltage reaches the threshold values, The connected electrical appliances will be automatically turned off
• Working Voltage: AC90-300V
• Mechanical Life: Over 100000 Times
• Working Temperature: -25℃-70℃

1.      General Description

       DDS238-4 W type multi-function protective smart energy meter is designed to measure single phase two wire AC active energy and variable parameter. The meter have RS485 communication port and WIFI communication, it can use APP for remote reading and control on/off. All of its functions comply with the relative technical requirement for class 1 single phase watt hour meter in IEC62053-21 and its data communication rules obey the requirement of MODBUS-RTU and WIFI 802.11b/g/n.It is a long life meter with the advantage of high stability , high over load capability , low power loss and small volume .

The meter should be installed in suitable environment with ambient temperature range between

-25
℃
～+

55
℃
,the relative humidity less than 75% and temperature limits between    and

-40
℃
～+

70
℃
.

 The meter is manufactured complying with international standard IEC62052-11 on “Electricity metering equipment (AC) General requirements tests and test conditions” and IEC62053-21 on “Static meters for active energy (classes 1 and 2)”.

2.Specification and Technical Parameters

2.1Specification

2.2 basic parameters

Note: when it happens interrupt power-supply (power grid off ), the meter will not cut off , undervoltage event must last 3s , then it will cut off.  

 
2.2 Technical Parameters

2.2.1
Basic tolerance

2.2.2
Self-consumption

Current circuit is less than 1.5VA

Voltage circuit is less than 2W/8VA

2.2.3
Starting current

       Under the rated voltage , rated frequency and COSΦ=1 , the meter shall start and continue to register on application of 0.2% In (if CT is used) or 0.4% Ib .

2.2.4

A
nti-creeping

       The meter has anti-creeping logical circuit. When 115%Un is connected to the meter and current circuit is cut , the meter shall not create more than one pulse in a stipulated time

2.2.5 A
verage-life

       The meter can be used for at least 10 years in normal operation specified in this manual

2.2.6
LCD: 6+2 (999999.99kWh) 

3.Basic Features

3.1 Measuring positive & negative active energy with negative energy accumulated into positive energy

3.2 The meter display total active energy, positive active energy , negative active energy , total reactive energy , balance active energy

3.3 The meter also display real voltage , real current , real active power , real power factor , real frequency

3.4 Pulse LED indicates working of meter，Pulse output with optical coupling isolation                     .

3.5 RS485 communication port and WIFI communication

3.6 Measuring active energy without calibration under long term operation

3.7 Display step by step with button

3.8 APP can display total active energy, balance active energy, real voltage , current ,active power

and remoter control on/off.

3.9 Hour/Day/Month/Year history active energy consumption tracking by APP

3.9 It has overvoltage and undervoltage protection , it can set value from APP and by button

Each protection function can be opened/closed as customer requirement

3.10 It has overload protection ,it can set value from APP

3.11 Voice control on/off function

3.12 Alarm event records on APP

3.13 Prepayment function, if balance energy used up. It will cut off automatic. This function can be opened/closed by APP

3.14 Energy data can store on memory chip when power off, it also still measure energy whenlose WIFI connection and it will update the energy on APP when connect WIFI again

3.15 It can control on/off by hand with button when prepayment function close

3.16 It has timing control function , it can set value from APP

3.17 It can reset the active energy to zero from APP

4.Working principles

       Single phase voltage and current are sampled from respective sampling circuit and transformed into suitable signal, which is carried into integrated circuit , then the meter output pulse signal in positive appropriation to measured power to drive step-motor counter or LCD counter to realize energy measurement. The meter has energy pulse output for testing with pulse width of 80+20ms

9. Frame format

9.1   Read command（function code 03）

Send frame

Receive frame

 
9.2   Write command（function code 10）

Send frame

 
Receive frame

 
9.3   Energy meter register address

Note 1:  one register address is store 2 byte data ,so the data length read as 4 byte when data number is 2 .

Note 2:：you can use ID ID(0x00) to broadcast and got data when you do not know the meter ID. But this ways is only for 1 pcs meter to connection on RS485 wire

10. Display item