BK/GMA-V-100MA

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Fuses are electrical devices that protect circuits from high currents by employing a fast-acting circuit-breaker. The BK/GMA-V-100MA fuses have been designed to provide wide range of applications. They are capable of interrupting low overloads and short-circuits in low voltage distribution systems. In this article, we will discuss the application field and working principle of BK/GMA-V-100MA fuses.

Application Field of BK/GMA-V-100MA

The BK/GMA-V-100MA fuses are designed for low voltage distribution systems, and they act as a primary protection device for branch circuits, feeders and service equipment. It can be used in industrial, commercial and residential installations, as well as Class I, Division I, Hazardous locations, for example, oil refineries, petrochemical plants, chemicals manufacturing, nuclear plants, etc.

It has an over-current rating of 100A and a maximum interrupting rating of 10kA. The standard construction of the BK/GMA-V-100MA ensures a high performance even under tough electrical conditions. The fuses have dual-screw terminals (#8 – 32) for reliable connections and have an operating temperature range of -20°C to +60°C.

Working Principle of BK/GMA-V-100MA

The BK/GMA-V-100MA fuses function by melting an electrically conductive metal element inside the fuse in order to create an open circuit, preventing further current flow. In normal operation, the fuse contains a low-resistance element across its terminals, and carries the load current. When an overload or a short-circuit occurs, the load current increases to a very high level and the electrically conductive element melts due to the heat generated by the current. This causes an interruption of the circuit and prevents further current flow.

The BK/GMA-V-100MA also includes a replaceable element which consists of a copper core with a silver-plated copper-magnesium-chromium-iron alloy wire coating. This element contains two fusible parts and is designed to convert the excess current into heat, then melting and interrupting the current flow. The melting process occurs in no more than 8 ms.

The replaceable element of the BK/GMA-V-100MA also contains a replaceable time-delay slide, which is designed to delay the interruption of the current by a certain time, depending on the application. This delay time ensures that the fuse does not open on normal operating currents, and only opens on high overloads or short-circuits. This helps to prevent unnecessary interruption of the circuit.

The BK/GMA-V-100MA fuse also includes a replaceable fuse indicator, which helps to easily detect when the fuse need to be replaced. The indicator is made up of a white plastic flag which is visible from the outside, and a colored plastic disc which slides out from the fuse. This disc indicates when the fuse has opened and needs to be replaced.

Conclusion

The BK/GMA-V-100MA fuse is a reliable and efficient electrical device that can be used for low voltage distribution systems. It can protect circuits from dangerous high currents, and can also provide time-delay capabilities, helping to delay the opening of the circuit on high overloads and short-circuits.

The fuse is also very easy to install, and it is designed to provide a long service life. It has a wide range of applications, and it is suitable for hazardous locations, making it one of the best fuses in the market.

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