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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
(4)Protect the motor
Item listing:
(1) WCS2750 Current module one piece;
(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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