อุปกรณ์ไฟฟ้า  เครื่องป้องกันกระแสไฟเกิน WCS2750 Over Current Protect dectecting module Limited -1.25A-50A Sensitivity 0.032V/1A , Power Supply 5V WCS2750 AC and DC Current ,limited and protect dectecting  module Description:

The Supply voltage: 5V; Supply Current:8mA;
Limited Currnt:1.25A-50A
Current Range:-50A-50A;
Board Size::45mm*34mm;


Application:

(1)For AD converters;

(2) Overcurrent Fault Latch;

(3) Peak Detecting; (4)Protect the motor

Item listing: (1) WCS2750 Current module    one piece;

(2) Ribbon cable  one piece;
Like the picture below: The Schematic diagram Two Output Signal:
(1)Analog signal(Aout1):   Aout1=Vcc/2+Ia*0.032V/A (That varies linearly with the uni- or bi-directional AC or DC primary sampled current, IP , within the range specified);
  (2)Switch signal Dout2 When Vref>Aout1,The Dout2 is Low level(0..49V). When Vref<Aout1,The Dout2 is High level(4.9V).

Questiong 1:How to set the Value of The Vef;

Answer:

When rotate the adj-Resiter (R17)  clockwise ,The Value of Vref is decreasing  ,
When contrarotate the adj-Resiter (R17)  ,The Value of Vref is increasing. , Questiong 2:How to set the Value of the Overcurrent fault?

Answer:

First step: Connect the Primary Sampled wire,make the detected device working,then turn on the 5VDC power;

Second step : find out  the threshold of  Vref compair Aout1,now we can watch the state of the (CH1_work),


if  the led(Vo2_led) is on ,We can   rotate  the adj-Resiter (R17)  until the the led(Vo2_led)is off.That is The critical point.Then we must do one thing again,contrarotate the adj-Resiter(R17)  clockwise until the led(Vo2_led) is on again.That is ok.When overcurrent happans,the (Vo2_led) is off,The Dout2 is High Level.
if the led(Vo2_led) is off,We can contrarotate the adj-Resiter (R17)  clockwise until the led(vo2_led) is on,Which is the critical point of  Vref  and Aout1,That is ok.When overcurrent happans,the (Vo2_led) is off.The Dout2 is High Level.

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