Over Voltage and Under Voltage Control Using Relay
CONTENTS
1. INTRODUCTION 2. DESIGN PRINCIPLE 3. CIRCUIT DESCRIPTION
a. Power supply
b. Under voltage/over voltage detector
c. NOR Gate (OR and NOT gate)
d. Bi-stable / Latch
e. Relay driver
f. Buzzer Driver
4. FUTURE EXPANSION 5. CONCLUSION
INTRODUCTION
The protection system is one o the important aspect on which major manufacturers is concentrating. The companies like L&T, SIMENS etc. The protection system not only provides durability to the equipment but also avoid hazards. The protection system is one of the major fields in the electrical engineering. There are different types of protection systems out of that very common and important one is the voltage protection system. Normally all the electrical equipments are specified with a specific voltage range for its safe operation. When ever those equipments are applied with a voltage more then the upper specified limit the system may draw excess current which may cause to burn the equipment. The equipment is designed to withstand a specific voltage when ever the voltage goes beyond the limit value then automatically the insulations used in that equipment get punctured and cause a damage to the equipment. Similarly whenever the equipment is applied with a voltage lower then the lower specified voltage it draws excess current to maintain the efficiency. The out put may not be proper and the equipment may damage. The over voltage and under voltage relay in combination protect the device from fluctuation of voltage. This type of relay provides the equipment complete protection against undesired voltage condition. The over voltage and under voltage relay is one of the important protective relays which is used in the practical application at industries to protect motors transformers and other electronic and electrical equipment and power system.
DESIGN PRINCIPLE:
The over voltage and under voltage relay is designed using potential
1. INTRODUCTION 2. DESIGN PRINCIPLE 3. CIRCUIT DESCRIPTION
a. Power supply
b. Under voltage/over voltage detector
c. NOR Gate (OR and NOT gate)
d. Bi-stable / Latch
e. Relay driver
f. Buzzer Driver
4. FUTURE EXPANSION 5. CONCLUSION
INTRODUCTION
The protection system is one o the important aspect on which major manufacturers is concentrating. The companies like L&T, SIMENS etc. The protection system not only provides durability to the equipment but also avoid hazards. The protection system is one of the major fields in the electrical engineering. There are different types of protection systems out of that very common and important one is the voltage protection system. Normally all the electrical equipments are specified with a specific voltage range for its safe operation. When ever those equipments are applied with a voltage more then the upper specified limit the system may draw excess current which may cause to burn the equipment. The equipment is designed to withstand a specific voltage when ever the voltage goes beyond the limit value then automatically the insulations used in that equipment get punctured and cause a damage to the equipment. Similarly whenever the equipment is applied with a voltage lower then the lower specified voltage it draws excess current to maintain the efficiency. The out put may not be proper and the equipment may damage. The over voltage and under voltage relay in combination protect the device from fluctuation of voltage. This type of relay provides the equipment complete protection against undesired voltage condition. The over voltage and under voltage relay is one of the important protective relays which is used in the practical application at industries to protect motors transformers and other electronic and electrical equipment and power system.
DESIGN PRINCIPLE:
The over voltage and under voltage relay is designed using potential