This standard requires a test voltage which is 5% higher than the rated voltage. Hrc fuse construction, working and characteristics. The characteristic of an hrc fuse is compared with that of an induction relay. Fuses with gg characteristics protect associated cables. High voltage fuse technology for more information visit our website. The fuse wire does not deteriorate and is more reliable in operation fig. This ppt describes about, introduction of fuses, construction, important terms, advantages and disadvantages, desirable characteristics of fuse element, current time characteristics, fuse types low voltages fuses and high voltage fuses, semi enclosed rewirable fuse, hrc cartridge fuses parts, operation, pros and cons, high voltage fuses and its types, selection of fuses. Can we use hrc fuse inplace of semi conductor fuse. This type of alloy has some specific characteristics due to which this is preferred as fuse wire.
Technical specification for 12kv powder filled current. Kvssn rao, faculty member, national institute of industrial engineering. Anl kind of fuses is mostly used in cars for the audio systems. Simply click the cross reference box to activate a. Hrc fuse links that can be traced back for over half a century through gec alsthom and english electric and it is easy to understand why the expertise available to ge power. In the uk, fuses of this type are specified for use at voltages up to 250 v and currents up to 100 a. Selected hrc fuse links should have current rating not less than the normal full load current of circuit. Electrical fuse, electrical protection, electrical faults, hrc fuses, short circuit currents, over. Design and construction siba hv fuse links have parallel connected pure silver fuse elements. Siemens industry catalog energy lowvoltage power distribution lowvoltage components sentron protection, switching, measuring and monitoring devices fuse systems 3na, 3nd lv hrc fuse systems lv hrc fuse links. Siemens fuses with operating class gg for a rated voltage up to 230v are mutually selective in.
Metcalf, in the late 1930s consists of applying overlay spots of special low melting alloy onto the fuse element. The design of hrc fuses link depends upon rating of current and voltage to be handled. The operation of hrc fuse clearly shows that when the over rated current. Mi 6212 1 x fuse base 160 a, hrc 00, 3 pole rated current of busbars 250 a note. Hrc fuses are widely used in industrial installations and are also used in the public power grid, e. The time and current operating characteristics of fuses are chosen to provide adequate protection. Electrical faults, hrc fuses, shortcircuit currents, over currents.
Concept and working of different types of fuses protection. Electrical fuse, electrical protection, electrical faults, hrc fuses, shortcircuit currents, over. There is also a presence of a switch through which the fuse can be removed without getting an electrical shock. The construction of the fuse element is similar to the low voltage fuses. Construction of fuses fuse markings basic operation fuse element materials the material used as fuse element must have the following. Enycon assemblies for construction sites homepage products mi power distribution boards up to 630 a hrc fuse box with busbars. The nontrip free circuit breaker may be held in under fault conditions and the circuit will be. During the time when heavy current flows, if the fault is removed then it does not melta otherwise it melts. This report consists of design, manufacturing process and other considerations to be taken care during manufacturing of hrc fuse links. Inaddition, they serve as bases for lv hrc fuse links in accordance with din 43620 part 1 and for disconnecting blades. Nh fuse din type blade contact hrc fuse contains a fuse wire in it, which carries the short circuit current safely for a given time period. High rupturing capacity hrc hrc fuse or high rupturing capacity fuse. The enclosure of hrc fuse is either of glass or some other chemical compound.
Because the hrc fuse will act,at the time of short circuit or the current exceeding the fuse limit. Of course provided you can find ones of suitable dimensions. Introduction a fuse is one type of over current device that is designed to be a sacrificial element in an electrical power system. Electrical fuse hrc fuse high rupturing capacity electrical4u. These are used to prevent the home appliances from the high current or overload damage. Can you replace the glass fuses in a multimeter with hrc fuses of a similar voltage and current rating. The element is welded or soldered to the fuse contacts blades or ferrules. Mv fuse links can interrupt any current below the rated breaking capacity that melts the fuse elements satisfactorily. Automatically tripped to protect from fault current when a fuse is blown applied highspeed rotary puffer type for extinction of arc. Hrc fuse or high rupturing capacity fuse in that type of fuse, the fusewire or element can carry short circuit heavy current for a known tim. The diagram below illustrates the three performance criteria in terms of their minimum breaking current i3. Lv hrc fuse bases size 004a lv hrc fuse bases are suitable for surface mounting on mounting plates and for direct mounting on busbars. Lowvoltage high rupture capacity hrc fuses are used in the area of main distribution.
No we should not use the hrc fuse in place of semiconductor fuse. M effect bussmann high voltage fuse links include meffect as a design feature to enhance performance. Class gg fuse links provides complete protection of cables. Critical analysis using the 3and convergence classifier. High rupturing capacity hrc fuses are totally enclosed fuses with definitely known, high breaking capacities which have been developed after intensive research by manufacturers and supply engineers. An hrc fuse is a type of cartridge fuse, in which the fuse element is enclosed within a transparent capsule, usually made up of. Hrc fuse or high rupturing capacity fuse carry short ckt heavy current for a known time period, unlike the normal fuses. They are known as semienclosed or rewireable fuses. In power plants, hrc fuses are used extensively to protect buses, feeders and loads. During this period, if fault is removed, then it does not blow off otherwise it will melt and remove the circuit from electrical.
Hrc fuse high rupturing capacity fuse and its types this type of fuse contains a fuse wire in it, which carries the short circuit current safely for a given time period. For trouble free, longlife fuse protection, it is good design practice to select a fuse such that the i2t of. If we use a fuse in the homes, the electrical faults cannot happen in the wiring and it doesnt damage the appliance s from the fire of wire burning. In north america, fuses are required to clear only their rated voltage.
The typical fuse consists of an element which is surrounded by filler and enclosed by the fuse body. When the fuse gets break or damage, then an abrupt sparkle happens which may direct to damage your home appliances. In this type, the conducting plates are bolted to the base of the fuse. Hrc fuse links offer one of the best forms of protection for motor starting applications in view of very low short circuit stresses generated in case of a fault as compared to other protective devices.
Medium voltage hrc fuses cable cleats, cable joints, cable. Because of its high current rupturing capacity, a special method for extinguishing arc is required in the design of hrc fuse. Plus the comprehensive accessory range required for lv hrc fuse systems. Its configuration, mass and the materials employed are selected to. Hrc fuse consists of heat resisting ceramic body having metal end caps on which silver current carrying element. Enter your email below to receive free informative articles on electrical. The low and uncertain breaking capacity of semi closed fuses is overcome in hrc fuses. Internal construction may vary depending on ampere rating. The final product hrc fuses link is basically assembly of electrical conducting and insulating components. The disadvantage of all types of fuses, of course, is the fact that when they have.
Technical specification for 12kv powder filled current limiting fuse links for use in switchgear in oil page 7 of 9 specification ets120103 ver 3 ergon energy corporation limited abn 50 087 646 062 16. The body is a ceramic material of robust construction and has one or more element holes. You can find 00 and 3ag sized hrc fuses, but dont forget to top up the credit on the visa card before purchase. However, the best possible rating of a hrc fuse link selectedrecommended for such application depends on following requirements. Currentlimiting mv fuse links are similar in construction. Hrc fuse or high rupturing capacity fuse in that type of fuse, the fuse wire or element can carry short circuit heavy current for a known time period. The vapour of fuse element and the powder together form the high resistive substance which extinguishes the arc.
Erated fuses are physically dimensioned for easy installation in existing hardware. The standard range of fuses for low voltage industrial and. During this time if the fault gets removed, then it does not blow off. Using a new tool known as the 3and convergence classifier, it was observed that the mcb is the most. For trouble free, longlife fuse protection, it is good design practice to select a fuse such that the i2t of the waveform.
High voltage fuse technology thorne and derrick uk. Fuse photos in this catalog show typical construction of a particular ampere rating. Lv hrc signal detectors 543 signal detectors for when a fuse is tripped on all lv hrc fuse links with combination or front indicators with noninsulated grip lugs. Mersens enhanced cross reference search over 20,000 mersen crosses are accessible via the search icon. Lv hrc fuse bases and accessories 545 fuse bases for screw or snapon mounting onto standard mounting rails. Request pdf performance of hrc fuse and mccb in low voltage distribution. Electrical fuse in normal working condition of electrical network, the current flows. By using advanced fuse technology, current ratings up to 400a have compact dimensions, but retain standard dimensional and performance requirements. Hrc fuse high rupturing capacity fuse and its types. Accessories tripindicator fuses are available for use in parallel with the main fuse. They are actuated by alvhrc fuse handle in accordance with din43620 part 4 and vde0680. Other than the glass some chemical compound also used to make hrc fuse and it depends on construction. All cooper bussmann british style fuses are tested to iec 269. Crca sheet steel used in the construction of pccs mccs pdbs shall be 2 mm thick for structure, 1.
In electronics and electrical engineering, a fuse is an electrical safety device that operates to. It is a complicated construction made up of almost 100 individual parts 3. The components like fuse element to be designed in accordance to customers requirement. Hrc fuse linkshrc fuse links low voltage industrial red spot standard red spot 400 series. Fuse characteristics, terms and consideration factors. S01574a ofaa s01574a fusegear bs and din type hrcfuse. Erated fuses greater than 100 amps must melt within 600 seconds at an rms current in the range of 220% to 264% of the fuse s nameplate current rating. A fuse is a protection device used to protect a device or a circuit from severe damage caused due to overcurrent or short circuit faults. The larger the wire cross section, the larger is the current that the fuselink will carry without operating. Generally the material used for hrc fuse is glass but which is not always in the case. But the semiconductor fuse will act when the current exceeding as well as no current in.
Design and manufacturing of hrc fuse links engineers. This type of fuse is very reliable in performance and can be used when discrimination is required. These leadfree surfaces mount devices offer reliability and. Performance of hrc fuse and mccb in low voltage distribution. It does not deteriorate and has a high speed of operation fig.