HMJ-LESS-FUSE

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Fuseholders are an essential component in many electrical systems because they keep circuits safe by providing protection against electrical overload. One of the most popular types of fuseholders is the HMJ-LESS-FUSE, which is an expansion type thermal-mechanical fuseholder. It is designed to provide a reliable protection against short circuit and overload fault currents without the need for additional support components. Here we will take a closer look at the application field and working principle of the HMJ-LESS-FUSE.

Application Field

The HMJ-LESS-FUSE is mainly used in low voltage electrical systems such as switchgear assemblies, distribution boards, motor controllers and other control systems. It is also commonly used in medical appliances, computer and communications systems, home automation systems and various types of industrial control systems. The HMJ-LESS-FUSE is a reliable and safe choice because it is designed to be used without additional components such as fuses, circuit breakers or contactors.

Working Principle

The HMJ-LESS-FUSE is a two-part fuseholder consisting of a plastic body and a thermal element. The thermal element is a bimetallic strip that\'s made of two different metals with different thermal expansion rates. When connected to the power supply, the resistance of the bimetallic strip increases, causing heat to be generated. The heat causes the bimetallic strip to bend, which in turn causes the plastic body to expand. As the plastic body expands, it opens a contact between the two terminals, thus creating an open circuit and protecting the circuit from the fault. As the fault is cleared, the bimetallic strip cools down and the plastic body contracts back to its original shape, thus restoring the circuit and allowing it to function normally.

The HMJ-LESS-FUSE has many advantages over other types of fuseholders. It has a very fast response time when switching and is easy to install and maintain. Additionally, it is very reliable and can withstand temperatures up to 135°C and current ratings up to 125A. It is also much safer than other types of fuseholders because it does not require additional components such as contactors or circuit breakers.

In conclusion, the HMJ-LESS-FUSE is a reliable and safe choice for a wide range of electrical systems. It is designed to provide protection against short circuit and overload fault currents without the need for additional support components. It is easy to install and maintain and has a very fast response time. It is also much safer than other types of fuseholders because it does not require additional components such as contactors or circuit breakers.

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