High Voltage Protection

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saumya_85

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I Want to have the high voltage input protection( 285~300 Vac) for my design. Can anyone help me?
 

Hi,
This is what I use in my inverter. Use this as the sense section. When input is > 285V, SIGNAL OUT > appr. 4V
You can use a comparator to compare this against a 4V reference or you can use a microcontroller to do this.
Then you can drive a relay to switch the load off.


Hope this helps.
Tahmid.
 

    saumya_85

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Thanks for the reply.
Could you let me know the voltage of C1 Capacitor and also suggest comparator circuit.
 

Hi,
The voltage depends on your max input voltage. A safe voltage would be 600V.
Hi, try this, I think it will help you.



Hope this helps.
Tahmid.
 

    saumya_85

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Thank you Tahmid for the support.
 

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