0
The main advantage offered by an HRC fuse is that, when a fault current condition occurs, a tremendous amount of heat is created within the fuse. That heat melts the silica sand filling of the fuse into glass. Glass, being an insulator, suppresses any arc-over and breaks the circuit instantaneously. This behavior minimizes the possibility of a continuing - and dangerous - "high arc current" situation from developing, which is what happens if a normal fuse fails to break a heavy fault current.
Compared to normal, "non-HRC" fuses, the main disadvantage of using an HRC fuse is that they cost a lot more to make - and to buy - because of the extra materials they contain. But choosing to use an HRC fuse instead of a normal fuse makes very good sense if the equipment that needs to be protected - or other equipment nearby - would be very expensive to replace if it all went up in smoke just because of a fuse which was not capable of stopping a high fault current flowing.
So, if some expensive electrical equipment was supplied with one or more HRC fuses installed to protect it, you would be very foolish indeed to replace them with normal "non-HRC" fuses.
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoA HRC fuse is a fuse that is filled with silica sand surrounding the fuse link. It is used on applications where the fault current needs to be suppressed fast and with no flash over. On a fault current a tremendous amount of heat is created within the fuse. That heat melts the silica sand into glass, and glass being an insulator, suppresses the arc over and breaks the circuit instantaneously.
Add your answer:
Earn +20 pts
What is the full form of hrc in term of hardness?
high ruptured capacity
Various types of fuses mcb how they work?
From Transmission and Distribution Electrical Engineering, Third EditionFuses act as a weak link in a circuit. They reliably rupture and isolate the faulty circuit under overload and short circuit fault conditions so that equipment and personnel are protected. Following fault clearance they must be manually replaced before that circuit may be put back into operation. Striker pins are available on some designs such that remote alarms may be initiated on fuse operation. Miniature circuit breakers (MCBs) or moulded case circuit breakers (MCCBs) are also overcurrent protection devices often with thermal and magnetic elements for overload and short circuit fault protection. Earth leakage protection, shunt trip coils and undervoltage releases may also be incorporated in the designs. As a switch they allow isolation of the supply from the load. Normally the MCB requires manual resetting after a trip situation but solenoid or motor driven closing is also possible for remote control. This chapter describes the various types of fuse and MCB together with their different uses and methods of specification. Examples and calculations for correct selection of different applications are also given. == Table 11.1 gives a summary of different fuse types, their uses, advantages and disadvantages. Table 11.2 summarizes some current relevant standards covering fuses. There are various categories ranging from subminiature electronic and solid state device protection fuses, power types (expulsion and high rupturing capacity (HRC)) to 72 kV. {| |+ Table 11.1: Summary of fuse types ! Category |- ! Types ! Use ! Advantages and disadvantages | # High voltage fuses above... |}
How does a fuse work if there is a current that is too high?
The overflowed circuit would cause the fuse to burn and thus break the flow of electricity to the house. This is a safety measure by which the flow of electricity is topped when the energy is higher than what the normal household appliances can handle. Traditional fuses burn out and cant be re-used ( the wire inside really burns). Modern circuit breakers just flip the switch to off if more than sufficient current flows in. Once deemed safe, we can flip the breaker to On and resume the electricity flow.
What is the chemical composition of HCHCR Material?
A high carbon And High Chromium steel is called HCHCr material.Normaly consists carbon of 2% and Chromium of 12% Silicon and Manganese vary between 0.2-0.35% This is a direct hardening material and can be hardened to 58-60 HRC. This material is used for manufacturing press tools and sheering blades.
What is the carbon equivalent of a grade 8.8 bolt?
Whoever wrote 58-62 HRC here originally was wrong. My thoughts and prayers are with the five people who found that useful. For 4140 steel (most commonly used for this grade), the hardness range would be 33-39 HRC. This puts it comfortably above the 150,000 psi min. tensile strength.
What is the difference between semiconductor fuse and high rupturing capacity fuse?
Devices such as transistors, IGBT, thyristors in order to protect them the rupture time is in msec. HRC fuses rupture time is more and the current for rupturing is also high making it suitable for motors/resistive loads.
What is full form of HRC fuse?
High Rupture Capacity fuse.
What are the advantages of a HBC fuse over a cartridge fuse?
HBC (High Breaking Capacity, European term) and HRC (High Rupturing Capacity, North American term) fuses have the ability to break high fault currents. This is done by having silica sand in the fuse that the fuse elements travel through. On high fault current that sand will melt and turn to glass. This breaks the current flow immediatelyA cartridge fuse maximum current breaking capacity is very much lower than HRC, HBC because there is nothing in the fuse body except the fuse elements.
What is the full form of hrc?
high ruptured capacity
What is the full form of hrc in term of hardness?
high ruptured capacity
What is meant by rapture capacity as in HRC fuses?
HRC stands for 'high rupture capacity'. An alternative abbreviation is 'HBC, meaning 'high breaking capacity. The rupture (or breaking) capacity is a term describing the maximum short-circuit current that the fuse can safely interrupt at its rated voltage. Most fuses will safely interrupt any level of fault current between a current that just causes the fuse to operate (melt), up to their maximum breaking capacity- such fuses are called 'full-range'. HRC fuses usually have strong, ceramic bodies to withstand the huge pressure generated when the fuse has to interrupt a large short-circuit current. In contrast, low breaking capacity fuses have weaker bodies made from materials such as glass.
What does the interrupting capacity of a fuse indicate?
The interruption capacity of a fuse is the ability of a fuse to stop the current flow on a short circuit condition. On high rupture capacity (HRC) fuses the fuse cartridge has silica sand surrounding the fuse link. When the link blows under a high current so much heat is generated that the silica sand actually turns to glass to extinguish the arc. A dual element fuse is used on motor starting circuits. Their construction inside with two current flow paths allow the high current of a motor start for a short interval of time without blowing.
What are heavy duty fuses?
The term "heavy duty fuses" is usually a common term applied to larger size fuses by the general public. The category of these types of fuses usually fall into the classification of a HRC fuse. High Rupture Capacity fuse. Stopping current flow once it is started is against the nature of flowing current. It wants to keep flowing even if it has to jump an air gap to do so. The lower the amperage the less likely this is to happen. In a non HRC fuse of higher capacity, once the fuse link has opened, the current may continue to flow for a short duration of time. With the HRC fuses there is silica sand surrounding the fuse link. When the link burns open, a tremendous amount of heat is generated and the silica sand around the fuse wire melts, creating a glass barrier to suppress the electric arc. This action shuts down the current flow immediately.
How do you check hrc fuse?
An ohm meter across the fuse will tell you whether the link is open or closed.
Is a 35 high on the Rockwell C Scale?
If 35 HRC is high on the Rockwell scale or not is quite relative to what you would define as high. A typical axe would rate at around 45-55 HRC, while high quality steel knives would rate at about 55-66 HRC.
What is difference between semiconductor and HRC fuse?
semiconductor fuse is used to save the diodes ,thyristers and IGBTS because the below time is very fast in the case of any short circuit and over current, HRC fuse is mostly used in the power factors panels and its below time is less then semiconducter fuses.
What is the hardness of 68 HRC mean?
The Rockwell C Hardness system uses "HRC" as a measure of hardness for various materials. A hardness of 68 HRC is extremely high and will most likely be harder than simple steel.
