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PROJECT DESCRIPTION

The main objective of this project is to develop a circuit to detect the under voltage and over voltage conditions so as to protect the electrical loads by a tripping mechanism based on predetermined voltage limits.

 The proposed system built with 555 timers operates in bistable mode. Whenever the input voltage falls above or below the pre-determined voltage limits, then the 555 timer develops a signal to cut off the load by a relay for safety reasons. In this project, a lamp is used as a load for an indication purposes.

 The future scope of this project can be extended by integrating an alarm that sounds when voltage mal-fluctuation occurs. It can also be interfaced with a GSM modem to convey alert messages to the user via SMS – for the user to take appropriate action.


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The main objective of this project is to develop a circuit to detect the under voltage and over voltage conditions so as to protect the electrical loads by a tripping mechanism based on predetermined voltage limits.

 The proposed system built with 555 timers operates in bistable mode. Whenever the input voltage falls above or below the pre-determined voltage limits, then the 555 timer develops a signal to cut off the load by a relay for safety reasons. In this project, a lamp is used as a load for an indication purposes.

 The future scope of this project can be extended by integrating an alarm that sounds when voltage mal-fluctuation occurs. It can also be interfaced with a GSM modem to convey alert messages to the user via SMS – for the user to take appropriate action.


PROJECT HIGHLIGHTS
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Non-Microcontroller Project.
Branding-free material.
Call/mail for Tech Support from 10 am - 7 pm IST.
×
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Non-Microcontroller Project.
Branding-free material.
Call/mail for Tech Support from 10 am - 7 pm IST.
BLOCK DIAGRAM
Load Cut off Switch Upon Over Voltage or Under Voltage
Hardware Requirements
  • 555 Timers
  • LED
  • Voltage Regulator
  • Resistors
  • Potentiometer
  • Capacitors
  • Diodes
  • Relay
  • Lamp
  • Transformer
×
  • 555 Timers
  • LED
  • Voltage Regulator
  • Resistors
  • Potentiometer
  • Capacitors
  • Diodes
  • Relay
  • Lamp
  • Transformer
Q & A
Q:  Can I replace lamp with any load?
A:  Yes, any electrical load up to 200W can be used.
Q:  What is over and under voltage protection?
A:  Tripping the load under low voltage and high voltage conditions is over and under voltage protection.
Q:  Is there any alarm indication provided for abnormal conditions?
A:  Yes, a buzzer continuously beeps for these conditions
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