Design and programing of Relay Menu Interfacing LCD And Keyboard Design and Simulation of ZCD Design and Simulation of Measurement of Voltage Magnitude 8 80 100 100 7 40 90 100 0 0 35 85 5 40 75 95 27TH JAN 15TH FEB 1ST MAR 15TH MAR PROJECT PROGRESS PF V and I MHO Total
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Design and programing of Relay Menu
Interfacing LCD And Keyboard
Design and Simulation of ZCD
Design and Simulation of Measurement of Voltage Magnitude
8
80
100
100
7
40
90
100
0 0
35
85
5
40
75
95
27TH JAN 15TH FEB 1ST MAR 15TH MAR
PROJECT PROGRESS
PF V and I MHO Total
• Interfacing of LCD.
• Interfacing of Keyboard.
• ON/OFF Control.
• Reset.
• Menu.
• UP/DOWN/LEFT/RIGHT for navigation.
• Menu Consist of
• MTA Setting.
• Zone 1, Zone 2, Zone 3 impedance setting.
4/14/2014Electrical Department PES University
• Zero crossing detector(ZCD) is a voltage comparator that switches the output between +Vsat and –Vsat when the input crosses zero reference voltage.
• Working of ZCD can be easily understood if you know the working of a basic op amp comparator.
• In ZCD, we are setting one of the inputs as zero i.e. zero reference voltage.
• The output is driven into –Vsat when the input signal passes through zero to positive direction.
• Conversely, when input signal passes through zero to negative direction, the output switches to +Vsat.