HVA-2-NR

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The HVAs-2-NR are large main circuit electrical fuses designed to protect electrical systems from being damaged due to over-current or short-circuit faults. This type of fuse operates at a rated voltage of up to 690V and are available for current ratings ranging from 80A to 300A. In comparison to other types of fuses, these are relatively low-resistance devices, which allow them to respond quickly and accurately in even the most hazardous overload or short-circuit fault conditions.

The HVAs-2-NR are typically used in industrial applications, such as those in the oil and gas, manufacturing, marine and pharmaceutical industries. With their high fault current ratings and excellent response time, they are an ideal choice for any application in which reliability and protection are essential. In addition, their higher fault current ratings also protect the equipment and motors from damaging currents during short-circuit outages.

The primary working principle of the HVAS-2-NR is based on the concept of thermal electromotive force (EMF). This basic physical principle states that when a current flows through a wire, a thermal EMF is generated. This EMF can be used to measure the magnitude of the current. In this type of fuse, two metal strips are embedded in the fuse body. When the current flowing through them reaches a certain level, the metal strips heat up and the resulting thermal EMF causes the fuse to open.

The second working principle of the HVAs-2-NR is based on the current-limiting technology. This is a unique technology that limits the current passing through the fuse to a safe level before the thermal EMF takes over. This principle uses a purpose-built carbon-filled element that provides a variable resistance path to limit the current. This path is monitored by a control unit which will open the fuse if the correct current is exceeded.

The HVAs-2-NR is also equipped with a current transformer which monitors the circuit and provides a variable voltage output to ensure the correct fuse response. The current transformer also monitors the high-voltage circuit and provides a warning light to indicate a potential fault or unsafe circuit. This technology prevents the fuse from reacting to false signals.

In addition to the above-mentioned features, the HVAs-2-NR fuse also comes with short-circuit limitation technology. This technology limits the peak current during a short-circuit condition to a safe level and helps protect the equipment from damage. This type of protection is particularly useful in low-voltage electrical systems.

Overall, the HVAs-2-NR fuse is an ideal solution for any application in which accurate, reliable protection is required. It is equipped with a range of features that are designed to protect both the equipment and motor during dangerous overloads, short circuits, and other potentially hazardous electrical faults. By utilizing the thermal EMF and current-limiting technology, this type of fuse is able to offer better protection and greater reliability when compared to traditional fuses.

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