Last Updated on October 27, 2023 by Kevin Chen
Cartridge fuses are vital for keeping your home safe. They protect against power surges by breaking the circuit when the current flow is too much, which will then prevent fires.
Thanks to a circuit breaker, you can also reset these fuses without having to shut off power or flip a switch.
You may think these fuses are simple, but there’s actually quite a bit of information about them that you may not know. Here’s all you need to know about cartridge fuses and how they work.
What is a cartridge fuse?
A cartridge fuse is a safety device that protects your home from fires. It works by breaking the circuit when too much current flows through it, which prevents fires.
You’ll find these fuses in different electrical outlets throughout your home. When there’s an overload of power, they will trip the circuit and break it to prevent a fire from starting.
These fuses can be reset quickly, so you don’t have to worry about not having power for long periods of time. You can also replace them without shutting down the entire system.
How cartridge fuses work?
Cartridge fuses are very easy to use and install. They’re usually located on the main breaker or fuse box for your home’s electrical system.
Each one has a plastic casing with two metal ends inside where you stick the wires from your circuit into slots, then secure them with screws at each end to keep them in place.
Once you’ve installed them, you can connect them to any wiring or circuit breaker.
When there’s an overload of power, the cartridge fuse will trip and break the circuit. This stops energy from flowing through the wires, which prevents a fire from starting.
It also keeps you safe from electrical shock. When you’re ready to turn the circuit on again, you just reset the cartridge fuse by flipping it over to its original position with a screwdriver or other tool. You can then turn the power back on.
Cartridge fuses vs. other types of breakers and fuses
If you have a fuse box in your home, you probably also have other types of fuses and breakers, such as time delay and motor-protective fuses, as well as circuit breakers. Cartridge fuses are the simplest type of circuit breaker and are often used in homes.
You can use them in your electrical system to protect specific circuits or devices that need extra protection from electrical overloads.
Cartridge fuses vs time delay
Time delay fuses are similar to cartridge fuses but they have a longer time delay than cartridge fuses do. They’re much more sensitive to electrical current than cartridge fuse devices, so they’re not as commonly used in residential settings.
Cartridge fuses vs motor-protective switches
Motor-protective fuses are designed for use with motors like those found in appliances and tools that draw a lot of power when they’re turned on. They’re also designed for use with appliances that require large amounts of power at very high temperatures.
The temperatures inside the motor could reach 1,800 degrees Fahrenheit or more when the motor is running at full power.
The melted glass inside of a motor-protective fuse will change to a solid state after it has melted and then cooled, so you can use the device to monitor the amount of current that’s flowing through your system without worrying about overloading your circuits.
Cartridge fuses vs circuit breakers
Circuit breakers are also used in homes and they’re similar to cartridge fuses but they’re more sophisticated than cartridge fuses are.
They have a mechanism that can sense when there’s an electrical overload and they can be reset with just a push of a button.
They’re designed for use on circuits that draw large amounts of power so that they can keep up with heavy usage without overloading the circuit.
Components of a cartridge fuse
Even though we have looked at the cartridge fuse working principle, it will be prudent to see the components that make the whole thing work.
It is the part that covers the fuse.
The brass cap is usually found at the end of the fuse, where it is connected to a wire or a terminal. It not only protects the element inside of the fuse from damage but also helps in making a better connection between it and its respective wire.
It has two main parts, which are:
The element has to be resistant to high temperatures, so ordinarily it’s made out of an alloy of nickel and chromium called nichrome.
The element will heat up when current flows through it and melts the glass insulator that separates it from its cap.
The melting glass creates an electrical short circuit so that no more current can flow through the device. When this happens, you’ll have to replace your cartridge fuse as it’s now useless.
This part of your cartridge fuse will protect your element from damage by keeping them separated even when they’re heated up by an electrical overload. It is usually made out of a special type of glass that can withstand high temperatures.
Types of cartridge fuses
The following are the two main types of cartridge fuses:
Quick-acting cartridge fuse
This type is usually used in small appliances, such as your toaster or hair dryer. They are characterized by their ability to respond quickly to the flow of current, usually within 30 to 40 milliseconds.
Because of this, they are also called fast-acting fuses. When their elements melt, they create a short circuit and stop current from flowing through the fuse. At this point, you should replace them immediately since they have served their purpose.
Time-delay cartridge fuse
These types of fuses are used when it’s important to have time to shut down an electrical circuit before it overheats and causes fire or other damage. They have a longer response time than quick-acting cartridges so that an overload has more time to cool down before it reaches the melting point of the fuse.
Other types based on their designs include:
-Ferrule-type fuses: These fuses are designed to be placed in the circuit so that they can be easily replaced. They work by closing the circuit when they melt.
-Knife-blade cartridge fuse
These fuses are designed to be clipped onto each terminal of the fuse. They have a long, thin blade that cuts through the fuse when it is melted.
They are often used in computers, printers and other equipment that have low voltage circuits where it’s important to limit the amount of time that the circuit is energized.
Advantages of cartridge fuses
Are cartridge fuses that important? You may ask.
Yes, these fuses are vital in their respective application areas. Here are the top advantages of cartridge fuses:
-Have high breaking capacity: This means that the fuse has a long life span. It has the ability to withstand high current flows without blowing. This makes it ideal for protection of circuit breakers in power transformers and other electrical equipment.
-Have fast response time: The speed of the fuse is very fast. This allows you to immediately stop the flow of electricity into the circuit when an overload occurs.
-Have a low tendency to overheat: Cartridge fuses have a low thermal resistance, which makes it resistant to overheating and fire.
-Can be used in many different types of electrical equipment: Cartridge fuses can be used in many different types of electrical equipment, including transformers and motors, as well as voltage regulators and relays, and other circuits that contain low voltage circuits such as computers, printers, TV sets, telephones etc.
-Are easy to install: They are often easy to install because they are designed for ease of use. They also have a long life span and are able to withstand high physical shocks, so they are often installed in places where it is likely that they may be exposed to shocks and vibrations.
-Do not require maintenance: There is no need for maintenance on cartridge fuses because their design makes them resistant to shock, heat and vibration. They also have a long lifespan that allows them to last for many years without requiring any maintenance or replacement.
-Easy to replace: Cartridge fuses are often easy to replace because they are designed for ease of use. This means that they are often relatively cheap to replace compared to other types of fuses.
How are cartridge fuses rated?
When it comes to buying cartridge fuses, one of the things that you will look at are the ratings. But how are they rated?
They are usually rated in terms of current and voltage.
Each cartridge fuse is rated in terms of its current capacity, which is the current that it can safely handle.
In addition to this, cartridge fuses are also rated in terms of voltage and temperature ratings. For example, if you have a device that requires 12 volts and you use a cartridge fuse that has been rated at 100 volts and 120 degrees, it will blow after only 10 seconds of use.
In addition to this, cartridge fuses are also rated in terms of their current capacity and time ratings.
What is the specification of a cartridge fuse?
Other than the rating, it is also important to know the specifications of any typical cartridge fuse. Some of the key technical specs that you should know about cartridge fuse include:
– Current rating: This is the maximum current that can be drawn through the fuse.
– Voltage rating: This is the maximum voltage that the fuse can withstand.
– Time rating: The time in which a fuse will blow after reaching its rated temperature are some of the time ratings that you should know about.
– Temperature rating: The temperature at which a cartridge fuse will start to melt or burn is also a key technical spec that you should know about.
-Diameter: The diameter of a cartridge fuse is also a key technical spec that you should know about. This is because they come in different sizes and this will eventually affect their application areas.
-Mounting: The mounting materials that you can use to mount your fuse are also part of the technical specs of the fuse.
-Resistance: The resistance ratings of a typical cartridge fuse are also key technical specs that you should know about.
-Current sensing: Some cartridge fuses have current sensing capabilities, which means that they will cut out if the current through them exceeds their rated current capacity.
What is the standard for cartridge fuses?
The standard for most cartridge fuses is IEC 60027-2-27, which is one of the most commonly used standards for all types of fuses and fuses in general. It describes some important specifications such as power rating, voltage rating, current rating, time rating and temperature ratings.
How do I replace a cartridge fuse?
To replace a cartridge fuse, you need to first identify the fuse in your circuit. This can be done by looking at the wiring diagram and by checking the fuse box label.
After identifying the fuse, you will have to remove it from its current mounting location. This is usually a small plastic box that you can find in most homes or offices. After removing it, you will need to remove any mounting screws that are holding it in place.
After removing the old fuse, you will need to replace it with a new one. To replace a cartridge fuse, you should use the same method of installation as used by the original manufacturer of your circuit and wiring system.
This is because some cartridge fuses come with mounting clips or other specialized mechanisms that should be used during installation to ensure proper electrical contact between terminals of cartridge fuse and circuit board terminals.
This guide has served as a lesson for all the essentials about cartridge fuse. In case you are interested in learning more on cartridge fuse, you can send your direct inquiry to us. We at ICRFQ are a trusted sourcing agent for the cartridge fuses in China.
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