L&T Intern Presentation

[Virtual Presenter] Today, I want to talk about a group of five extraordinary students from the Government College of Technology in Coimbatore, India. These students had the privilege of presenting at the L&T Electrical & Automation Switchgear Training Centre. They are part of the Department of Electronics & Instrumentation Engineering and earned this chance through their commitment and dedication. All of them demonstrate the essence of excellence and I am certain that their feats will stimulate many in the future..

[Audio] L&T Electrical & Automation Switchgear is India's leading low voltage switchgear producer. They specialize in the production of low and medium voltage switchgear products, electrical systems, energy meters, and automation solutions. Furthermore, they have Switchgear Training Centres located in various locations all over India. Their purpose of these centres is to encourage good electrical engineering practices among the younger generation of engineers. Recently, our five students were privileged to have visited one of these Training Centres which granted them a unique experience..

[Audio] Electrical safety is a vital topic to discuss, especially considering a group of five students from the Government College of Technology in Coimbatore, India, recently presented at the L&T Electrical & Automation Switchgear Training Centre. Electrical energy has become increasingly prevalent, but with that comes increased risk for accidents. To assess the safety of electrical energy, we must consider different areas, such as accidents, unsafe acts, unsafe conditions, occupational hazards, and electrical hazards. Electrical fires, overloads, short circuits, and electrical shocks are all forms of electrical hazards, and the degree of danger depends on the magnitude of current, part of the body where the current passes, and the duration of exposure to the current. Switchgears are essential to providing protection against these electrical hazards, making it important to be aware of them..

[Audio] India has the world's third-largest power system infrastructure, with an installed power generation capacity of 356 Giga Watts, providing electricity to over 1.2 billion people. Thermal, hydro, nuclear, natural gas and renewables are the main sources of power generation in India, with transmission networks managed by electricity transmission utilities and distribution handled by state electricity distribution companies. The power sector in India has undergone significant transformation in recent years, establishing the country as one of the leading countries in terms of electricity generation capacity. The Government College of Technology in Coimbatore, India, is a key player in electrical and automation engineering education, and five of its students are showcasing their research and findings at the L&T Electrical & Automation Switchgear Training Centre..

[Audio] Switchgear is an integral component of any electrical system, having the purpose of providing protection, switching, and control. Five students from Government College of Technology in Coimbatore, India recently discussed the importance of switchgear selection, which includes device or combination of devices that can make, carry and break electric current under both regular or abnormal circumstances. Moreover, it is essential to consider various terms and utilization categories such as voltages, currents, behaviour when subject to overload or short circuits, and utilization categories. Understanding the rated operational voltage, current, insulated withstand voltage, uninterrupted current, making current, breaking current, time withstanding current, as well as ambient air temperature, altitude, humidity, and pollution degree, these factors all play a role in switchgear selection..

[Audio] Contactors are an electromechanical control device for switching that are used in a range of industrial and residential settings. Slide 6 focuses on the advantages of contactors, which are known for their unique features, such as high operational life, a high frequency of operation, remote operation, no-volt protection, and automatic operation in APFC panels. Furthermore, contactors can be utilized in various categories, including special applications, like motor starters and APFC controllers..

[Audio] Contactor is an electrical switching device used to control electrical power, connecting power source to electrical load. It consist of a coil connected to power supply and a set of contacts to either open or close a circuit. When the coil is energized, the contacts close to complete the circuit and when the coil is de-energized, the contacts open the circuit. Recently, five students from Government College of Technology in Coimbatore, India presented and demonstrated the construction and working of contactors at L&T Electrical & Automation Switchgear Training Centre, giving them a valuable hands-on experience..

[Audio] The research conducted by a group of students from the Government College of Technology in Coimbatore, India was presented at the L&T Electrical & Automation Switchgear Training Centre. It centered around Motor Protection Concepts & Relays. They identified various problems that motors face, such as Coil problems, Insulation failure and Mechanical damage, and the reasons behind motor failure such as Overload, Heavy starting, Locked rotor, Number of starts, Single phasing, Anomalies in cooling, Supply variation, and Unbalance in supply. Additionally, they recognized the main Motor Protection devices like Temperature Sensing Type and Current Sensing Type. They concentrated heavily on the use of Relays which provide protection against overload and in the case of single phasing. They studied three major types of Relays, including Electromechanical type, Electronic type and Thermal type/Bimetal type..

[Audio] Five students from the Government College of Technology in Coimbatore, India presented at the L&T Electrical & Automation Switchgear Training Centre. They discussed the working principle of Bimetallic and Thermal Overload Relays which offer protection from overload and single phasing. They explained how two metals with varying temperature coefficients are mixed to produce one that expands more than the other. The two types of sliding mechanisms were discussed, including single slide mechanism and double slide mechanism. The single slide mechanism offers only overload protection, whereas the double slide mechanism provides both overload and single phasing protection..

[Audio] This slide presents the working of bimetallic relays. Bimetallic relays are widely used in the electrical and automation industries. They consist of a bimetallic strip with two dissimilar metals. When an electrical current passes through the strip, it creates heat and causes the two metals to contract and bend in opposite directions. This motion then moves a slider that opens or closes the connection to the load. For single slide mechanisms, the motion is linear, whereas for double slide mechanisms the motion is rotary, resulting in faster trip times. This is an important safety feature that protects motors from overload current." This slide focuses on how bimetallic relays work. Bimetallic relays are composed of two dissimilar metals. When an electrical current passes through the strip, the metals contract and bend, causing the slider to move. For single slide mechanisms, the motion is linear, while for double slide mechanisms the motion is rotary. The faster trip times of the double slide mechanism help protect motors from overload current..

[Audio] "This project is about how a group of students from the Government College of Technology in Coimbatore, India, have developed a system to both protect loads from overvoltage and monitor these loads remotely. The system includes shunt control and monitoring of voltage, current, and temperature. This is a great example of how students can use their knowledge to create practical solutions to real-world problems..

PROJECT - CIRCUIT.

PROJECT - WORKING.

THANK YOU !.