Block diagram reduction techniques in control systems.ppt
TYPES_OF_FUSES_ppt.ppt
1. Sardar Vallabhbhai Institute Of
Technology , Vasad
TYPES OF FUSES
Prepared by,
Sheth Mansi S.
ID NO.-16BEEEG009
ENROLLMENT NO-160410109118
2. INTRODUCTION
•FUSE
WHAT IS FUSE?
HOW FUSE IS CONSTRUCTED?
HOW FUSE WORKS?
•TYPES OF FUSES
(A) LOW VOLTAGE FUSE
1. REWIREABLE FUSE
2. CARYRIFGE TYPE FUSE
(B) DROP-OUT FUSE
(C) STRIKER AND SWITCH FUSE
(D) HIGH VOLTAGE FUSE
1. HIGH VOLTAGE HRC CARTRIDGE FUSES
2. HIGH VOLTAGE HV LIQUID FUSE
(E) OTHER FUSES
1. MINIATURE FUSE
2. SEMICONDUCTOR FUSE
3. NH FUSE
4. THERMAL FUSE
5. CYLINDRICAL FUSE-LINKS
6. TIME DELAY FUSE
7. CERAMIC FUSE
8. SMD FUSE
9.MEDIUM VOLTAGE FUSE
3.
4. What is fuse?
• Fuses are a type of over-current protection device. The essential component is a
metal wire or strip that melts when too much current flows, which interrupts the
circuit in which it is connected. Short circuits, overloads or device failures are often
the reason for excessive current.
• A fuse interrupts excessive current (blows) so that further damage by overheating
or fire is prevented. Over-current protection devices are essential in electrical
systems to limit threats to human life and property damage. Fuses are selected to
allow passage of normal current and of excessive current only for short periods.
• Fuses serve two main purposes:
1. To protect components and equipment from costly damage caused by over-
currents.
2. To isolate sub-systems from the main system once a fault has occurred.
• There are thousands of different styles of fuses available in the world. The primary
way to group them is by Low Voltage (Voltage Rating less than or equal to 1500V)
or Medium Voltage (Voltage Rating between 1500V and 40.5kV).
8. Low voltage fuse
•A fuse is a type of over-current protective device that is
designed to be a sacrificial element in an electrical power system.
Fuses are designed to open circuits when excessive over-currents
are present and are designed to prevent further damage to the
system that might result if the fuse were not present. The use of
fuses in a circuit provides cheap insurance should there be an
accidental or unintentional fault in the system wiring or
components. Low voltage fuses are very common in electrical
systems and they come in diverse styles, shapes and sizes. Low
voltage fuses are defined as fuses with a voltage rating less than
or equal to 1,500V.
13. high voltage fuse
•A fuse is a circuit element designed to melt when the current exceeds some
limit, thereby opening the circuit. In high voltage and high power applications,
some additional design considerations come into play. For instance, if the
length of the fuse wire or strip is short enough, an arc will form between the
ends maintaining the circuit as long as there is current to supply it. In systems
with high peak current capability (i.e. with capacitors and low impedance
circuitry), the fuse can be melted and vaporized so fast that an explosion
occurs. This phenomenon is actually used in Exploding Bridge Wire
detonators to create a shockwave that detonates high explosive.
