WEM3080TR: measure the reactive power and kvarh of the 3 phase system.
How to use WEM3080TR to measure the reactive parameter of the 3 phase system.
About WEM3080TR
WEM3080TR: WEM3080T+reactive parameters
Reactive parameters includes both Q(KVAR) and KVARh of the three phase.
Q(Kvar): reactive power, positive value means inductive, negative value means capacitive
KVARh: reactive energy, each phase contains two KVARh, KVARh for inductive load and KVARh for capacitor load.
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API: reactive measurement
Firmware Version requirements
"i.75.88.66" or higher
Turn on the reactive measurement
Normally, the reactive measurement is closed, it needs to be opened manually.
/api/reactive?x=1
Data format of the "monitorjson" after turn on the reactive measurement
After you open the reactive measurement, there will be an extra "EA" field in the JSON return. There is a "Reactive" field which contains 3 arrays in "EA"
Each element in the three arrays represents the Q value(reactive power), the inductive KVARh value, and the capacitive KVARh value of each phase.
{
"method":"uploadsn",
"mac":"B0F8933C1DF7",
"version":"i.75.98.66",
"server":"em",
"SN":"2205310001",
"EA":{
"Reactive":[
[
-953,
56.789,
65.879
],
[
-948,
78.659,
2.323
],
[
-944,
65.245,
6.666
]
]
},
"Datas":[
[
219.7,
0.5,
-54.9,
11.337,
11.201,
49.99,
0.5
],
[
219.9,
0.499,
-55.4,
11.039,
10.908,
49.99,
0.5
],
[
219.9,
0.499,
-55.7,
10.975,
10.846,
49.99,
0.51
]
]
}
Turn off the reactive measurement
/api/reactive?x=0
Inquiry the status of the reactive measurement
/api/reactive
Data format of the "monitorjson" after turn off the reactive measurement
Reference
The "hidden" features in the firmware of the Wi-Fi energy meter
