MergeResult_2024_04_04_04_hhhhh43_48.pptx

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1. Bee 1 (electrical) seminar:- Roll no. 1314-1326 •Switches •switch fuse unit •fuse switch unit •Diffrence between switch fuse unit and fuse switch unit

2. Switches Switches are electronic components that can open or close an electrical circuit to control the flow of electricity.they are commonly used in various devices and systems to turn things on or off, such as lights, appliances and machinery . Switches come in different types, including toggle switches and rotary switches .

3. Diagram :

4. In this diagram: The horizontal line represents the electrical circuit. The Lines connected to the switch represent the terminals where electrical connections are made. When the switch is in the open position, the circuit is broken and no electricity flows. When the switch is in the closed position, the circuit is complete and electricity can flow through it.

5. Fuse switch unit definition A fuse switch unit is an electrical Device That combines a function of a fuse and a switch. It is used to protect electrical circuits from over currents and short circuits, while also providing a means of isolating the circuit for maintenance or repairs. When a fault occurs, the fuse within the unit will blow, interrupting the current flow and protecting the circuit to be manually disconnected when necessary.

6. Applications Industrial Applications In industrial settings, fuse switch units are often used to protect heavy machinery and equipment from over currents and short circuits. They provide a convenient way to isolate specific machinery for maintenance or repairs without shutting down the entire system Commercial Buildings: Fuse switch units are installed in commercial buildings to protect electrical circuits serving lighting, HVAC systems, and other electrical appliances. They ensure the safety of the building’s electrical infrastructure and allow for easy maintenance when needed.

7. Residential Installations: In residential settings, fuse switch units are commonly found in electrical distribution boards. They protect household circuits from overloads and faults, and they provide a way to disconnect power to specific areas or appliances when necessary. Renewable Energy Systems: Fuse switch units are used in renewable energy systems such as solar and wind power installations. They protect the electrical components of these systems from damage due to over currents and provide a means of isolating the system for maintenance or troubleshooting.

8. * SWITCH FUSE UNIT (SFU)* * Definition and brief note * •A switch fuse unit, also known as a fuse switch or a fuse disconnect switch, is an electrical device used for the purpose of protecting an electrical circuit from overcurrents. •It combines a fuse with a switch in a single unit. • The fuse is used to interrupt the circuit in case of overcurrent, such as a short circuit or overload, while the switch allows for manual control of the circuit, such as turning it on or off for maintenance or repair purposes. •This combination provides both protection and control for electrical circuits.

9. It is typically installed in distribution boards or switch boards to provide protection and control for electrical circuit. This fuse are commonly used in industrial commercial and residential settings to safeguard electrical circuits from overcurrent and to allow for manual controls to the circuits

10. Protections provided by switch fuse unit It provides electrical isolations. Protection against electrical faults. It provides double protection. It provides circuit protection against overload. 467373

11. Applications of switch fuse unit Power distribution boards:- To protecting ectrical circuits and equipment from over current. Industrial Applications :-To protect machinery , motors and other electrical equipments from overload and short circuit. Commercial Building:- To protect electrical circuits. Residential installation:- To provide convenient way to isolate power during emergency. Outdoor installation:- For street lighting outdoor Power distribution at events.

12. Parameter Switch fuse unit Fuse switch unit Construction Switch fuse is a combined unit and is known as an iron clad switch, being made of iron. It may be double pole for controlling single phase two-wire circuits or triple pole for controlling three-phase, 3-wire circuits or triple pole with neutral link for controlling 3-phase, 4-wire circuits. Switch Fuse Unit comprises of vitreous steatite porcelain rewireable fuses or HBC fuse fittings complete with their conducting parts. The switch is fitted with sturdy side operating handle with quick make-break type mechanism. Contacts are made of electrolytic copper, silver-plated.

13. Parameter Switch fuse unit Fuse switch unit Mounting Protection provided Suitable for surface mounting. Protection against overload – currents above the rated value that last longer than what is normal for the application. Protection against electrical faults – During a fault such as a short circuit or line fault, there are extremely high currents that must be interrupted immediately. Suitable for surface mounting Fuse is perhaps the simplest and cheapest device used for interrupting an electrical circuit under short circuit, or excessive overload, current magnitudes. As such, it is used for overload and/or short- circuit protection in high voltage (up to 66 kV) and low voltage (up to 400 V) installations/circuits.

14. Parameter Switch fuse unit Fuse switch unit Ratings Application Available upto 1000 A. The Rewirable Switch Fuse Units are used for distributing power and protecting electrical devices and cables from damage due to fluctuations. This fuse unit is housed in an enclosure made using quality CR steel sheet. Available upto 1000 A. Fuse switch disconnectors are essential components of most electrical circuits. They protect dangerous overcurrent and ensure that the electrical circuit is safe. A fuse switch disconnector will also help to prevent damage to the wiring or other components in the system.

15. Parameter Switch fuse unit Fuse switch unit Circuit diagram

16. Thank you!