Table of Contents
Different Types of Fuses – Constriction, Working & Characteristics DC Fuses. AC Fuses. Cartridge Fuses. D – Type Cartridge Fuse. HRC (High Rupturing Capacity) Fuse or Link Type Cartridge Fuse. High Voltage Fuses. Automotive, Blade Type & Bolted Type Fuses. SMD Fuses (Surface Mount Fuse), Chip , Radial, and Lead Fuses.
How many types of fuses are there?
The low voltage fuses are divided into five types and those are of the rewirable, cartridge, drop out, striker, and switch fuses.
What are the most common fuses?
The most common are 3 A, 5 A and 13 A. The fuse should be rated at a slightly higher current than the device needs: if the device works at 3 A, use a 5 A fuse.
What are the different fuse classes?
Fuse Classes. How to Choose Correctly? Fuse Type Max. Current Rating Classification Class RK5 600A -Non-renewable -Current limiting -Time-delay Class C 1200A -Non-renewable -Time-delay Class CC (Midget) 30A -Non-renewable -Current limiting -Fast-acting Class T 1200A -Non-renewable -Current limiting -Fast-acting.
What is NS type fuse?
NS-F can be also used as a fuse stand. ● NS-TT enables disconnection and connection between the left and right banks with the internal short-circuit bar. ● NS-15 enables disconnection of 2 poles as a group.
What is a 3 amp fuse used for?
Plugs for appliances rated up to about 700 watts should have a 3-amp fuse (coloured red). For example: 3A Fuse – Table lamp, standard lamp, television, video, computer, mixer, blender, fridge, freezer, power drill, jig saw, soldering iron.
What is DC fuses?
DC Fuse. The DC fuse opens or breaks the circuit when the excessive current flow through it. The only difficulty with the DC fuse is that the arc produced by the direct current is very difficult to extinct because there are no zero current flows in the circuit.
What are the standard fuse sizes?
Generally, two sizes of user-replaceable fuses are found: the 1/4” x 1-1/4” and 5×20 mm. Each is available in a variety of volt and amp ratings. There are two basic types of fuses available for appliances and consumer electronics: fast-acting or time-delay.
What are Class P fuses?
Classification of LV fuses These having a fusing factor of 1.25 or less and provide protection Class P fuses for circuits that cannot withstand even small sustained overloads. .
What is the difference between a Class J and Class R fuse?
Class R fuses are available with DC ratings. They have an interrupting rating of 200kA rms symmetrical and are separated into two separate classes, RK1 and RK5. Current ratings of UL Class J fuses range from 0A to 600A, and the voltage rating is 600VAC. Class J fuses are available with DC ratings.
What are Class H fuses?
What is a Class H, Fuse? A UL Class H fuse is a non-current limiting, fuse that is rated to interrupt a minimum of 10,000 amps. The Class H fuse is a one-time fuse that does not have any appreciable degree of time delay. Class H fuses are rated at either 250 volts AC or 600 volts.
What is HRC fuse?
HRC fuse or high rupturing capacity fuse- In that type of fuse, the fuse wire or element can carry short circuit heavy current for a known time period. The chemical reaction between the fuse element vapour and filling powder results into high resistance material which helps in extinguishing the arc.
What are 5A fuses used for?
5A Fuse. Used mainly for lighting circuits.
Can you use a 3A fuse in a 1a plug?
100 Watts divided by 240 Volts equals 0.42 amps +10% which equals 0.46 Amps. So from this calculation the ideal fuse would be 1 amp. However most manufacturers put a 3 amp fuse in the plug as standard.
Can I use a 13 amp fuse instead of a 3?
The plugs are marked as such because they can handle a maximum of 13A of current. It is a mistake for people to assume that a 13A fuse should be used in this appliance. The 13A fuse is on the plug. The power rating is so low that we can quickly see that the fuse is too high and needs to be changed to a 3A one.
What is striker fuse?
Striker fuse: These fuses are provided with a spring-loaded striker that can act as a visual indicator that the fuse has blown and also activate other switchgear. Switch fuse: A handle that is manually operated can connect or disconnect high current fuses.
What is MCB fuse?
What is an MCB? Miniature Circuit Breakers (MCBs) are electromechanical devices which are used to protect an electrical circuit from an overcurrent. Unlike a Fuse, MCB does not have to be replaced every time after a fault occurs and it can be reused.
What is IEC fuse?
In electrical engineering, IEC 60269 is a set of technical standards for low-voltage power fuses. The standard is in four volumes, which describe general requirements, fuses for industrial and commercial applications, fuses for residential applications, and fuses to protect semiconductor devices.
What does MDA stand for on a fuse?
The Bussmann MDA Series are a group of low voltage, general purpose miniature fuses. These fuses are designed for use in appliances and consumer electronic equipment.
How do I know what size fuse to use?
Find the size of fuse by multiplying the amps required by the device (2) by 1.5. 2×1.25 = 2.5 then we will round up to the nearest fuse size (in multiples of 5 amps) which would call for a 5 amp fuse.
What is the difference between a 5 amp fuse and a 13 amp fuse?
The 5 amp fuse protects 5 amp rated wiring from overheating in a fault or overload condition and maybe causing a fire. Fitting a 13 amp fuse means that wire will catch fire if a fault or overload occurs. ALWAYS replace a fuse with the correct ( same) rating fuse.
