Fuse

Your Leading Fuse Supplier

Baoding Sihedan Electric Technology Co.,Ltd is located at Baoding city Hebei Province China. It is a high-tech enterprise specializing in the design and production of fuses. A fuse is an electrical component designed to protect electrical circuits by safely opening the circuit under abnormally high current loads. Fuses come in many shapes and sizes, but each one is designed to protect a circuit with a specific set of electrical parameters. Our fuses include extension fuses and LV fuses. If you are interested, please send email to info@dkline.net we will reply you in the first time.

Why Choose Us?

OEM & ODM Service

We especially have advantage on OEM and ODM of all electric Power fittings.

Advanced Facilities

We have specialized production workshops for machinery, forging, welding, stamping etc.

Global Market

Our Products are sold to USA, Malaysia, Bolivia, East Timor, England, Hong Kong, Camernoon, Kenya, Uganda etc.

Classification of Fuse

Extension Fuse

An extension fuse is a type of fuse that is often used in electrical systems to provide over - current protection in specific situations where there is a need to extend the reach or application of the fuse protection. Extension fuses are commonly used in electrical distribution systems, especially in situations where there is a need to protect individual branches or specific electrical devices that are located at a distance from the main power source.

LV Fuses

LV fuses are fuses designed for use in low - voltage electrical systems. In general, low - voltage refers to voltages below a certain level, typically up to 1000 volts in AC systems or 1500 volts in DC systems. In residential electrical panels, they protect the individual circuits that supply power to different parts of the house. In commercial and industrial settings, LV fuses are used to protect motors, transformers, control panels, and other low - voltage electrical equipment.

Technical Parameters of Fuse

ITEM	JPU	JHU	JSU
Rated voltage	415/500V AC	415/500V AC	415/500V AC
Rated breaking capacity	50KV	50KV	50KV
Standard	BS88-2, IEC60269-2-1	BS88-2, IEC60269-2-1	BS88-2, IEC60269-2-1
Class	Gg/Q1	Gg/Q1	Gg/Q1
Rated current	20A-800A	20A-800A	20A-800A

Characteristic of Fuse

Voltage Rating

Voltage rating are taken into consideration for environmental and circuit safety. Fuse specifications therefore include the highest voltage that the fuse is capable of receiving.

Current Rating

This represents current carrying capacity of fuse under standard temperature and conditions. Only fuse will get damage by rapid rise in current.
Current Circuit = 75% of Current Rating of Fuse

I2T Value of Fuse

The product of square of the current in the circuit should be less than I2T value of the device.

Temperature

The operating temperature of the fuse is directly proportional to its current capacity.

Response Characteristic

It refers to how a fuse behaves in response to overcurrent conditions. Common response characteristics for fuses include: Quick-Acting, Time-Delay, Medium Time-Delay and Very Fast-Acting.

Packaging Size

The packaging size of a fuse refers to the physical dimensions and shape of the fuse, it is essential when selecting a fuse for a particular application to ensure that it fits correctly and functions properly .

Calculating the Value of the Fuse Required

Fuses in plugs are made in standard ratings. 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.
● If the device works at 10 A, use a 13 A fuse.

The equation P = I × V can be rearranged to find the current if the power and voltage are known.
I = P ÷ V

For example, what current flows through a 1.4 kW electric fire at a
potential difference of 230 V? Remember that 1.4 kW is equal to 1,400 W.
Current = 1,400 ÷ 230 = 6 A

The best fuse to use in example would be the 13 A fuse. The 3 A and 5 A fuses would melt and break the circuit even when the fire was working normally.

Fuse Installation and Safe Use

Always use a fuse with the correct rating for your circuit.

Turn off the power before installing or replacing a fuse.

Ensure the fuse holder is secure and properly insulated.

Regularly inspect fuses for signs of damage or wear.

Ordering Process

Buyer sends inquiry --> Buyer receives quotation --> Order confirmation --> Buyer sends deposit --> Seller prepares

After-Sales Service

Give a clear answer to the user's complaints within 24 hours.

If necessary, we send technicists to the user's site to solve the problem timely.

Return visit at regular intervals.

Establishing the user's record.

Long warranty period, and whole life service and support.

Providing the latest industrial information.

Payment Terms

1:	We are accepting T/T and L/C payment terms. And FOB, CIF, CFR.
2:	Sample order: 100% payment before shipment.
3:	Bulk order: 50% deposit balance before shipment.

FAQ

Q: How does a fuse work?

A: A fuse contains a metal element which is designed to carry a limited electrical current. When a short circuit or overload occurs, the higher current will generate heat causing the fuse element to melt and create a gap in the fuse element. This gap breaks the current flow through the fuse (and circuit). A fuse must be replaced once it has blown.

Q: What happens if I install the wrong fuse?

A: · Worst case scenario is damage to the equipment caused by a fault current or overload.
· Other possibilities include the fuse blowing even though there is no electrical fault.
· It is always best to replace a blown fuse with the same fuse or direct equivalent.

Q: How do I decide which fuse I need?

A: · When replacing original fuses, in most situations we can provide either the exact same fuse or an equivalent fuse produced by a different manufacturer.
· When selecting a fuse for a new application, you need to consider many factors such as; element speed (ie. time/current curves), voltage, nominal current, ambient temperature, available space etc.

Q: How do you determine the correct value for a fuse?

A: Selecting the right fuse rating is crucial for both protecting the circuit and preventing damage to the components, The following factors must be considered while selecting: 1- The circuit's normal operating current & and equipment nameplate rating current (fuse rating should be higher)

Q: What is the main function of a fuse?

A: The primary use of an electric fuse is to protect electrical equipment from excessive current and to prevent short circuits or mismatched loads. Electrical fuses play the role of miniature circuit breakers. Apart from protecting equipment, they are also used as safety measures to prevent any safety hazards to humans.

Q: When to use a fuse?

A: A fuse can be used to mitigate short circuits, overloading, mismatched loads, or device failure. When a damaged live wire makes contact with a metal case that is connected to ground, a short circuit will form and the fuse will melt.

Q: What is the purpose of a fuse in a plug?

A: The fuse in a plug is a safety device designed to protect the lead rather than the appliance. It is a deliberate weak link in a circuit, which will blow if an electrical appliance or extension lead draws too much current due to either an overload or a fault.

Q: What happens when a fuse blows?

A: The fuse wire 'blows' by heating up and melting, creating a gap in the circuit and shutting off the electric. You will know if a fuse has blown if your lights suddenly go out or your electrical appliances stop working.

Q: Can I use a 5A fuse instead of 3A?

A: The British Standard for plugs, BS1363, has standardised on just two preferred fuse ratings, 3A and 13A, however, any fuse rating up to 13A can still be used.

Q: How do you choose the correct fuse?

A: The way the code of practice indicates this should be done is by looking at the appliance power rating. This is generally written in Watts. If the appliance is under 700watts then a 3amp fuse should be fitted.

We're well-known as one of the leading fuse manufacturers and suppliers in China. Welcome to buy high quality fuse at low price from our factory. Contact us for more discount information.

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