hi Guys,
i'm newbie in here. so, i have a project to measure 3 Phase AC Voltage. i Find some solustion to use ZMPT101B. but when i read the spesification this input module just measure to 250 Volt. so can u give me solution how to make zmpt101b module for measure 3 phase ac Voltage (Line to Line / 380V) or can u give me some advice to use another sensor or module?
in this project i use arduino due as microcontoller.
thank you very much.
Here is a link to the PDF manual showing how to compute the series resistor value to use the device with any voltage up to 1000 VAC. To read three phases you will obviously need three devices. Plus the rectifier, etc for each phase.
www.zeming-e.com/file/0_2013_10_18_093344.pdf. I was sure I put the link in!
Have up ever been trained to handle high voltage AC wiring?
Paul
no, i don't have any experience to handle 3 phase AC voltage before. do you have the sketch for this module or just change this resistor in input (R12) for input module can measure 380 v (Line to Line)?
Thanks before.
SA89:
no, i don't have any experience to handle 3 phase AC voltage before. do you have the sketch for this module or just change this resistor in input (R12) for input module can measure 380 v (Line to Line)?Thanks before.
Looks like that module expects a "Y" type 3-phase connection. Is that what you have ir do you have a "delta" type 3-phase connection? By the way, the peak voltage on 380 volt AC is 537.32 volts. Not something to play with.
Paul
SA89:
hi Guys,i'm newbie in here. so, i have a project to measure 3 Phase AC Voltage. i Find some solustion to use ZMPT101B. but when i read the spesification this input module just measure to 250 Volt. so can u give me solution how to make zmpt101b module for measure 3 phase ac Voltage (Line to Line / 380V) or can u give me some advice to use another sensor or module?
in this project i use arduino due as microcontoller.thank you very much.
Three phase is simply 3 phases - with one ZMPT101B per phase each only sees 220V. You do understand how
the device works, that you need a mains-rated (125k?) input resistor and an opamp output circuit.
The 380Vac only applies to the difference between 2 phases, not the voltage from each phase to neutral.
For measuring higher voltages you can use a larger input resistor to the transformer. Note the isolation
voltage limit of 4kV is appropriate to normal mains voltages.
Make sure the input resistor is on the hot side of the primary, then the transformer is basically at
neutral potential anyway, leading to lower capacitive EMI to the secondary.
MarkT:
Three phase is simply 3 phases - with one ZMPT101B per phase each only sees 220V. You do understand how
the device works, that you need a mains-rated (125k?) input resistor and an opamp output circuit.The 380Vac only applies to the difference between 2 phases, not the voltage from each phase to neutral.
For measuring higher voltages you can use a larger input resistor to the transformer. Note the isolation
voltage limit of 4kV is appropriate to normal mains voltages.Make sure the input resistor is on the hot side of the primary, then the transformer is basically at
neutral potential anyway, leading to lower capacitive EMI to the secondary.
IF his 3-phase is DELTA, there is no neutral involved.
Paul