Dropout Fuse

Your Professional Dropout Fuse Supplier

Cowin Electrical Co., Ltd. is a leading enterprise specializing in the export and manufacturing of electrical products. Our comprehensive product range includes distribution switchgear control equipment, high and low voltage electrical appliances and accessories, dropout fuses, surge arresters, disconnectors, insulators, power fittings, hardware tools, wiring terminals, and distribution boxes.

Rich Experience
With over 15 years of extensive experience in production and export, we have established a solid reputation in the industry.

Custom Service
We offer OEM/ODM services to meet your specific requirements, ensuring that the final products align with your expectations.

Professional Team
Our team comprises experienced and skilled designers, including CAD and 3D design specialists, who possess the capability to deliver exceptional designs for your projects.

Quality Control
We have obtained ISO9001 quality management system certification and comply with international standards such as IEC 60099-4, IEC 61643-1, IEC 291, and IEC 282, issued by the International Electrotechnical Commission (IEC).

Specification of Dropout Fuse

Project	RW12	RW12
Rated voltage (kV)	12(15)	12(15)
Rated current (A)	100	200
Rated frequency (Hz)	50	50
Base rated current (A)	100	200
Rated short-circuit breaking current (kA/A)	8/100, 12.5/100, 16/100	12.5/200, 16/200
Power frequency withstand voltage test (kV)	45/55	45/55
Power frequency withstand voltage dry test (kV)	50/55	50/55
Rated lightning impulse voltage (kV)	125	125
Creepage distance (mm/kV)	330	330
Mechanical life (times)	500	500
Altitude (mm)	1000	1000
Ambient temperature (ºC)	-40ºC~+70ºC	-40ºC~+70ºC

Types of Dropout Fuse

The dropout fuses produced by our company mainly include the following types:

Cutout Fuses

Cutout fuses are used to protect transformers and other electrical equipment in an overhead power distribution network. They are designed to disconnect the electrical circuit in the event of an overloading or short-circuit condition and are typically installed at the point where the electrical equipment is connected to the power distribution network.

Pad-Mounted Fuses

Pad-mounted fuses are housed in a metal enclosure that is mounted on a concrete pad. They are typically used in outdoor electrical systems, such as those found in residential and commercial power distribution networks. Some pad-mounted fuses may include features such as thermal protection, overcurrent protection, and surge protection to ensure reliable and effective performance in a range of electrical applications.

Applications of Dropout Fuse

● Power distribution systems: Drop-out fuses are widely used in power distribution systems, such as those found in utility companies and large industrial facilities, to protect against overloading and short-circuits.

● Residential electrical systems: Drop-out fuses are often used in residential electrical systems to protect individual circuits and appliances from overloading.

● Motors and other electrical equipment: Drop-out fuses can be used to protect motors and other electrical equipment from overloading and short-circuits.

● Lighting circuits: Drop-out fuses can be used in lighting circuits to protect the lighting fixtures, wiring, and other components from overloading.

● Outdoor electrical systems: Drop-out fuses can be used in outdoor electrical systems, such as those found in parks and other public areas, to protect against overloading and short-circuits.

● Agricultural equipment: Drop-out fuses can be used in agricultural equipment, such as tractors and other machinery, to protect the electrical systems from overloading and short-circuits.

● Uninterruptible Power Supply (UPS) systems: Drop-out fuses can be used in UPS systems to protect the electrical components from overloading and short-circuits during power outages and other disruptions.

Installation Steps of Dropout Fuse

Turn off the power
Before installing the fuse, make sure to turn off the power to the electrical system to ensure that there is no danger of electrical shock or damage to the equipment.

Identify the location
Choose a location for the fuse that is easily accessible and allows for easy connection to the electrical system. It should also be protected from the elements and have adequate clearance for maintenance.

Mount the fuse
Mount the fuse to the pole or other support structure using the appropriate hardware, such as bolts or brackets. Make sure that the fuse is securely mounted and will not move or vibrate.

Connect the terminals
Connect the terminals of the fuse to the electrical system using the appropriate connectors, such as screws or plugs. Make sure that the connections are secure and properly tightened.

Check the connections
Check all the connections to make sure that they are secure and properly installed. Also, check the fuse element and the operating mechanism to make sure that they are properly positioned and functional.

Restore power
Once the fuse is installed and all the connections have been checked, turn the power back on to the electrical system.

Test the fuse
Finally, test the fuse to make sure that it is working properly. This can be done by intentionally overloading the circuit or by using a test instrument to simulate a fault condition. If the fuse does not “drop out” or disconnect the circuit, then the installation may need to be checked or adjusted.

Precautions for Using Dropout Fuses

● Whether the rated current of fuse matches with the current value of melt and load properly, if not, it must be adjusted.
● Each operation of the fuse must be careful and careful, and should not be careless, especially the closing operation, the dynamic and static contacts must be in good contact.
● The standard melt must be used in the melting tube. It is forbidden to replace the melt with copper wire and aluminum wire, and it is not allowed to bind the contact with copper wire, aluminum wire and iron wire.
● For the newly installed or replaced fuse, the process of acceptance must be strict, and the quality requirements of the regulations must be met. The installation angle of the fuse tube should reach about 25 ° inclination angle.
● After the melt is fused, it should be replaced with a new one of the same specification. It is not allowed to connect the fused melt together and then put it into the melting tube for further use.
● The fuse should be inspected regularly, at least once a month at night, to check whether there are discharge sparks and poor contact phenomenon. If there is discharge, there will be hissing sound. It is necessary to arrange treatment as soon as possible.

Packaging and Shipping

Packaging	Export standard package or special package as the requirement of customers.
Shipping	We will help you to choose the best shipping way according to your detail requirements. By sea, by air, or by express, etc.

FAQ

Q: What is a drop-out fuse?

A: A drop-out fuse is a type of electrical protection device that is designed to disconnect the electrical circuit in the event of an overloading or short-circuit condition. Drop-out fuses are typically used in electrical systems to protect equipment and to prevent damage to the electrical system in the event of a fault.

Q: How does a dropout fuse work?

A: The drop-out fuse typically consists of a metal or ceramic casing, a fuse element inside the casing, and a mechanism that allows the fuse to disconnect from the circuit when the current reaches a specified level. This mechanism can be a spring-loaded arm, a melted fuse link, or some other type of release mechanism.

Q: What is the difference between a disconnect switch and a drop-out fuse?

A: Disconnect Switch: Used for manual circuit isolation to ensure safety for circuits and workers.
Drop-Out Fuse: Commonly used for automatic protection in power systems, especially in preventing overload and short-circuit faults.

Q: What are the advantages of drop out fuses?

A: Overload and short circuit protection.
Electrical safety isolation.
Retrofitting capability.
Long service life.
Reduced downtime.

Q: How do you size a fuse?

A: The general rule of thumb is to multiply the normal operating current by a factor of 1.25 to 1.5 to get the fuse ampacity. For example, if the normal operating current of a load is 10 A, the fuse ampacity should be between 12.5 A and 15 A.

Q: What are the factors to consider when choosing a drop-out fuse?

A: When choosing a drop-out fuse, factors to consider include the current rating, voltage rating, interrupting rating, response time, compatibility, and cost. It is also important to ensure that the drop-out fuse is specifically designed for the type of electrical system it will be protecting and to consult with a qualified electrical engineer or technician to ensure that the fuse is appropriate for the specific application.

We're professional dropout fuse manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to buy high-grade dropout fuse for sale here from our factory. Contact us for more details.