Active Fuse

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Fuse is an important part in the electricity supply network to an equipment, because without the presence of a fuse, maximum current that can pass through in equipment  will exceed the permissible limit when there is damage in the equipment.
    Theoretically, the fuse must have   zero resistance value  so that there is no voltage drop when the fuse has an electric current. But in reality the fuse always has a certain resistance value depending on the rating and quality of the fuse product. The existence of resistance to the fuse causes a voltage drop and heat to the fuse when electrified. Before getting inspired to create Active Fuse I once did a resistance measurement on the fuse that I poured in a piece of text and  I put that writing in this following  link :   http://www.sap.or.id/Measuring_Fuse_Resistance.html

It is not possible for conventional fuses to have no resistance, because when working to limit current, the conductors in a conventional fuse must experience three states, namely:
1. Overheating
2. Burned
3. Break up.

In order to perform such  three state above, the conductors in a conventional fuse must have resistance, and the way that the conductors in a conventional fuse can have resistance is to make these conductors thin, even thinner than human hair. Conversely, if the fuse is made of material that has low or zero resistance, then the fuse will not break when there is excessive current flowing through the fuse.

Conventional Fuse

In the context of the audio world, resistance can result in a decrease in the sound quality of audio systems that use fuses.
As an innovative response from this reality I was inspired to create an equipment that I named Active Fuse.

Active Fuse is an equipment that I made with the aim to replace the conventional fuse that is commonly used in audio equipment. If a conventional fuse uses a thin conductor, which can be even thinner than human hair, and this conductor will break when electrified which exceeds the rating of this conventional fuse, then Active Fuse uses an Low Resistance Contact Device (LRCD)  to disconnect or connect line electricity  to audio equipment .
Inside Active Fuse there is an ampere meter that monitors continuously the current passing through the audio equipment, if this current exceeds the desired limit then the control part of the Active Fuse will disconnect line electricity  to the audio equipment.


Overall there are 6 advantages features performed  by Active Fuse compared to conventional fuse, namely:
1. Presetable Current Rating
     Current rating on Active Fuse can be set from be 0.5A to 10A with a resolution of 0.1A
2. Presetable Fuse Response
     Responses from Active Fuse can be selected to work with Fast or Slow Blow responses
3. Turn On Delay
    When first turned on, Active Fuse will give a delay of several seconds before connecting line electricity  to audio equipment.
    The amount of this time delaycan be chosen between 5 seconds to 99 seconds.
4. Low Contact Resistance
     Because it uses an Low Resistance Contact Device, contact resistance from Active Fuse can be as low as 7 milliohms
5. Long Life
    Conventional fuses will break when flowing currents that exceed the amperage rating, and after that can not be used again. Another case
     with Active Fuse,     which can still be used after passing an electric current that exceeds the setting value.
6. Zero Crossing Contact.
    Before connecting PLN electricity to audio equipment, Active Fuse will monitor whether the amplitude of PLN electricity is at zero point,
    if so then Active Fuse will connect  line electricity to audio equipment, this feature will prevent MCB in your home from going down when
    turning on     audio equipment     Initially large     power. You can read the detailed explanation about Zero Crossing Contact at the
     following link: http://www.sap.or.id/Zero_Crossing_Contact_Eng.html

The first three features mentioned above, namely Current Rating, Response and Turn On Delay, can be changed according to need if Active Fuse is used on different equipment.

Active Fuse is physically composed of two parts namely the Active Fuse Unit and Active Fuse Communicator. Active Fuse Unit is the part where there are LRCD, ampere meter, etc.
Active Fuse Communicator is the part that functions to set parameters of the Active Fuse Unit.
I  separated the Active Fuse Unit from the Communicator so that the dimensions of the Active Fuse Unit could be reduced and the price could also be cheaper.
Active Fuse Communicator  only used if you want to change the working parameters of the Active Fuse Unit. If you have more than 1 Active Fuse Unit, then you only have  to buy 1 Active Fuse Communicator unit that can be used for all Active Fuse Units you have.
If you don't need to change the parameters of the Active Fuse Unit, then you don't need to buy Active Fuse Communicator, and I can do the parameter settings as your request.

According to my personal listening test, Active Fuse help the audio system to improve its quality in terms of
1. Bass sound  become deeper and tight
2. Sound stage  become wider and clearer
3. More precises sound depth
4. Sound from the system is more comfortable to hear and eliminate ear fatigue (ear fatigue)

Before using Active Fuse then the existing conventional fuse on the equipment must be replaced first with a jumper fuse. If this change is not carried out then the positive impact of Active Fuse will not be obtained, because electricity will still pass through conventional fuse.
Each Active Fuse unit is supplied with 2 fuse jumpers which are 5x20 mm and 6x30 mm to replace the existing conventional fuse. Fuse Jumper is made of pure copper rods that can flow up to 200A
Active Fuse has 2 output cables, one output is equipped with a power plug, this output is to be connected to the power distributor, and the other output is equipped with an IEC plug to connect to audio equipment.


Cooper Based Jumper Fuse

Following part are te explanation of each menu available at Active Fuse Communicator including  explanation
To move from one menu to next menu can be done by pressing Menu button

*  Fuse Rating Menu, this menu used to determine require fuse current rating,  it can be selected from 0.5A up to maximum 10A,
    resolution is     0.1A. Selection  current rating can be done by pressing (-) and (+) button to decrease or increase desired rating value.


* Fuse Respon Menu, with this menu  kind of fuse respon can be selected. Selection of respon are SloBlo and Fast.  Selection can be dpne by pressing (-) and (+) button.

* Turn On Delay (TOD), Menu.   This menu is to determine require delay time after Active Fuse Unit turned on. Minimum default delay is 5S and Maximum is 99S.
Selection can be d0ne by pressing (-) and (+) button, to decrease  or increase TOD

* After fuse specification already selected, all the data can be saved into Active Fuse  Unit, by the help of SAVE  Menu bellow

* To check wheter all the fuse data already saved or not,  Read menu bellow can be used

* Example read data can be seen on pic bellow. From left to right Rating, Respon and Delay

After fuse spec setting done completely, all fuse spec can be written manually on sticker.  The vynil sticker also supplied together with Active Fuse Unit.
Bellow pic is example.