HRC Fuse Link- Its Types and Advantages

A fuse is a current interrupting device that is typically used to protect the appliance as well as humans against currents and shocks. Used for short circuit protection in medium voltage (up to 33KV) and low voltage (up to 440 V) appliances, High Rupture Capacity (HRC) fuse links contain a fuse wire in it, which carries the short circuit current safely for a given period of time.

Usually, the standard material used in making HRC fuse link is glass. Its external enclosure is made sufficiently airtight to avoid the effect of atmosphere on the fuse materials. Several electrical brands offer a plethora of HRC fuses. Some of them are:

1.       NH Fuse:  NH fuse helps in providing overload and short-circuit protection for low and medium voltage. Light weighted with compact dimensions; it also furnishes backup protection to motor starters and other equipment against short circuits and overloads.

2.       Din Type HRC Fuse:  Available in wide range of rated currents, DIN fuses are used for different purposes at different temperature conditions, such as transformer protection or backup protection in both hot and cold temperature. They are used in air or gas insulated switchgear, mining, transformers and feeder sectionalizing.

3.       Blade Type HRC Fuse: Also known as a spade or plug-in fuses, Blade type fuses come in plastic bodies with two metal caps to fit in the socket. Mostly used in automobiles for wiring and short circuit protection, Blade type fuses are light weighted and contain low cut off current. Available in a plethora of size and shape, they are also used for short circuit and backup protection of motors.

Advantages of HRC Fuse Link:

·         It unblocks high as well as low fault currents.
·         It has high –speed operation and does not deteriorate with time.
·         It requires no maintenance except periodic tightening of connection.
·         It is inexpensive in comparison to other circuit interrupting devices featuring exactly the same             rating.
·         Simple and easy to install.
·         The fusing operation is fast without noise and smoke, permitting a consistent performance.
·         It provides stability in industrial power distribution and semiconductor protection.

To conclude, HRC fuse link offers several advantages over other type of fuses and supports extremely high backup protection to the circuit breaker with great breaking capacity.

Advantages of Digital Energy Meters over Analog Energy Meters

Digital meters are basically devices used for easuring voltage, current and resistance. Most of them are portable and battery powered units as well as show measurements in the form of numbers and symbols on an electronic display.

Advantages of Digital energy meters

Digital meters functionally outperform the traditional meters in variety of ways:

· Accuracy: One of the most significant benefits of using Digital meter is its accuracy. In nonlinear loads, it’s metering is highly accurate and free from observational errors.

·  Auto Polarity: By using digital meters we can read the negative values as well. An excellent example of this is voltage. Placing the probes into the opposite polarity result in negative output. This is considered to be a huge advantage of using digital energy meter over analogue which can cause the equipment to be broken.

·Output Display: The readings of a digital meter is extremely easy to gauge as the outputs are automatically displayed in numbers through a seven segment display. Unlike the analogue type which takes time, resulting in huge chances of occurring mistakes especially for those with poor eyesight.

·Inexpensive: It measures the electricity in both phase and neutral lines and calculate power consumption based on the larger of the two currents, thereby helps in improving the cost(comparatively cheaper than analogue meters) and quality of electricity distribution. With the advent of integrated circuits, sizes and cost, the power requirements of digital meter has been drastically reduced.

· Reduce theft and corruption: It also helps in reducing theft and corruption on electricity distribution network with electronic designs and prepayment interfaces.

· Current protection: Several digital meters feature protection from sudden shifts in currents as well.

There are several brands offering quality digital energy meters and other electrical machines which help the user in reducing effort and time manually by calculating the data as well as minimizing the errors that are encountered in various daily situations.