Please help me with High Low voltage cutoff with time delay

[sakbd.2010]

Hi,

Power line fluctuation is very common in my country, so was looking to build a Hi/low cutoff circuit for my power inverter which do not have one.

I hv found this circuit that looks nice,

High And Low Voltage Cut Off With Time Delay electronic circuit diagram

or
High And Low Voltage Cut Off With Time Delay Circuit -Power Inverter -Electronic Circuits Diagram-Elecpod

I hv built some circuit before and can breadboard one if needed. But the one I'm interested in uses LM741 op-amp, but I got one LM393 comparator available with me, so can someone please help me convert above circuit to use LM393(Comparator) Instead of LM741 op-amp.

I have already got the linear supply as was in above circuit detail. I was hoping to simplify the circuit with a single ic LM393 Instead of two 741's.

Also, I cannot find SL100 NPN transistor, But got some 2n2222a and BC547's, will they work instead of sl100 ?

Please help me build this circuit, as I need the inverter and hi/low protection for it, in fact writing this without line power i.e. backup power from the inverter.

My power line 230VAC 50 Hz

I have got one more question, How to protect the power supply circuit and transformer when the power line goes beyond 270(some times it does) any ideas ?? ....

 

[sakbd.2010]

OK, here is the schemetic of the circuit,

Also in my junk box found some HA17339, Believe they are LM339's...

Please help..