Hrc fuse high rupturing capacity fuse and its types. By using advanced fuse technology, current ratings up to 400a have compact dimensions, but retain standard dimensional and performance requirements. All other copies of this document are by definition. In this video i will show you working of hrc fuse and hrc fuse construction instagram. During this time if the fault is removed, then it does not. 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. Fuse characteristics can be classified into three general categories. Internal construction may vary depending on ampere rating. Introduction a fuse is one type of over current device that is designed to be a. Hrc high rupturing capacity fuse or link type cartridge fuse. The fuse wire inside the hrc fuse conducts the short circuit current for a period of time safely. It is mounted by screw connections in a holder which partly encloses it. In this type, the conducting plates are bolted to the base of the fuse.
Lv hrc fuse bases and accessories 545 fuse bases for screw or snapon mounting onto standard mounting rails, available as 1pole or 3pole version. Switch disconnectorswitch di sconnector fuse, hrc fuse fuse base power switching. Hrc fuse construction working advantages and disadvantages. Hrc fuse link range is available in 14x51 cylindrical, din and bs type.
This type of fuse is very reliable in performance and can be used when discrimination is required. 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. During this time if the fault gets removed, then it does not blow off. High voltage fuse technology for more information visit our website. These include voltage, current and the type of application. Jul 16, 2015 in some point of view hrc fuse is better than circuit breaker. The fuse base has the fuse cap, which is fitted with the fuse element with cartridge through adapter ring. 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. An hrc fuse is a type of cartridge fuse, in which the fuse element is enclosed within a transparent capsule, usually made up of. High rupturing capacity cartridge fuse, commonly called hrc cartridge fuses, have been designed. During the short circuit period, if fault is removed immediately, then the fuse.
Hrc fuse link is a very common, simple and effective electrical protection device against over load and short circuit current. A fuse consists of a replaceable part the fuselink and a fuse holder. In power plants, hrc fuses are used extensively to protect buses, feeders and loads. Configuration manual for catalog lv 10 20162017 chapter 5. Both the ends of ceramic body consist of metal end caps.
In that type of fuse, the fuse wire or element can carry short circuit heavy current for a known time period. This standard requires a test voltage which is 5% higher than the rated voltage. Mains construction instruction mci 0006underground distribution construction standard manual equipment technical specification ets 0083 12kv24kv expulsion dropout fuse. The complete range conforms to is 703 part 2 iec 602692 standards. The construction of the fuse element is similar to the low voltage fuses. 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. Class gg fuse links provides complete protection of cables. Fusegear bs and din type hrcfuse links offn, ofaf h.
The cartridge type of fuses has entirely closed containers and the metal contact as well. The enclosure of hrc fuse is either of glass or some other chemical compound. The abbreviation of hrc fuse is high rupturing capacity cartridge fuse. S01574a ofaa s01574a fusegear bs and din type hrcfuse. Hrc fuse operation,types and characteristics electrical. Lv hrc signal detectors 68 signal detectors for when a fuse is tripped on all lv hrc fuse links with combination or front indicators with noninsulated grip lugs. Hrc fuses type 3na3introduction lv hrc fuses during installations, when the hrc fuses are mounted on the fuse bases or switch disconnector fuse units in panels above certain height, it is very difficult to identify the status of the fuse.
Currentlimiting mv fuse links are similar in construction. Hrc fuse construction and hrc fuse working deepakkumar. A high rupturing capacity hrc fuse is a fuse that has a high breaking capacity higher ka rating. In this type of fuse, the fuse element is wound in the shape of the ring for removing the corona effect. In two or three sentences, state two main advantages of hrc fuses. Working of hrc fuse and hrc fuse construction in hindi. During the time when heavy current flows, if the fault is removed then it does not melta otherwise it melts. As clear from the figure above, the fuse element have a portion of tin alloy, known as a eutectic material. Combine headed bars with mechanical splices or metric sleeves or bolts. This kind is easily replaceable in the circuit without any load. May 29, 2018 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. For this purpose, special insulated fuse pullers are used. The element is welded or soldered to the fuse contacts blades or ferrules.
Medium voltage hrc fuses cable cleats, cable joints, cable. In this type of fuse, the flow of current by fuse element is given under normal condition. The applications of this fuse mainly include low voltage lv, high voltage hv, and small fuses. Again, these types of fuses are classified into two types, they are dtype and linktype fuses. Hrc fuse links for use in air on motor starting and general appucations voltage range 3. It does not deteriorate and has a high speed of operation fig. There is also a presence of a switch through which the fuse can be removed without getting an electrical shock. Selected hrc fuse links should have current rating not less than the normal full load current of circuit. In this mode, the fuse does operate during the first major half cycle, and does limit the magnitude of the fault current. Mv fuse links can interrupt any current below the rated breaking capacity that melts the fuse elements satisfactorily. Hrc fuses present a number of features such as low watt loss enabling longer life and very high breaking capacity.
Nh fuse din type blade contact hrc fuse contains a fuse wire in it, which. Its configuration, mass and the materials employed are selected to. The current carrying element is completely surrounded by the filling powder. High rupturing capacity hrc hrc is used by canadian and british standards as an equivalent to the u. The diagram below illustrates the three performance criteria in terms of their minimum breaking current i3. Hrc fuses mainly consist of a heat resisting ceramic body. All other copies of this bif document are by definition uncontrolled. To install them in their holders, the usual practice is to screw the fuse to the inside of the fuse. Rated watt loss w watt loss limits as per is 703 suitable for sdf units type fn fnx or equivalent 100 amp, fuse 7. Plus the comprehensive accessory range required for lv hrc fuse systems. Because of its high current rupturing capacity, a special method for extinguishing arc is required in the. Fuse characteristics, terms and consideration factors 24 fuse selection checklist 57. The fuse carrier can be pulled out and the blown out fuse element which wire melts can be fillup by a new one and carrier is replaced in the fuse base. Types and characteristic of hrc fuse the electrical portal.
The circuit is completed when the tip of the cartridge makes contact with the conductor. Both the ends of ceramic body consist of metal end. Fuses offer long life without deterioration in their characteristics or performance, and cartridge fuses have the particular advantage that they contain the arc products completely. Design and manufacturing of hrc fuse links engineers edge. Selection guide fuse characteristics, terms and consideration. This type of alloy has some specific characteristics due to which this is preferred as fuse wire. These types of fuse are used on equipment such as motors, which can draw larger than normal currents for up to several seconds while coming up to. The disadvantage of all types of fuses, of course, is the fact that when they have.
The industrial versions are characterised by either clipin tags, offset tags or centre tags. Industrial fuses made to bs88 standards are very popular in countries like england, australia and south africa. Hrc fuse consists of heat resisting ceramic body having metal end caps on which silver current carrying element is welded in a special manner as shown in figure below. It is one of the easiest forms of fuse which is used for the purpose of distribution. Hrc fuse construction, working and characteristics electrical. We have already disused in very details about hrc fuse high rupturing capacity construction, operation and their applications. Accessories tripindicator fuses are available for use in parallel with the main fuse. In hrc fuse or high rupturing capacity fuse, the fuse wire or element can carry short circuit heavy. All cooper bussmann british style fuses are tested to iec 269.
V14t33 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 current limiting fuses 3. Iec size in a ph w part number product hierarchy 0002000002 order. Hrc fuse or high rupturing capacity fuse carry short ckt heavy current for a known time period, unlike the normal fuses. Jan 02, 2019 hrc fuse or high rupturing capacity fuse 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. Illustrate, with a simple sketch, the construction of an hrc fuse. Fuse characteristics, terms and consideration factors. Class l 600vac, 300 to 6000a timedelay fuses form no. Currentlimiting mv fuse links are similar in construction to low voltage lv cartridge types. Hrc products are supplied to customer specified lengths from 250mm to 12 000mm. Figure a shows the essential parts of a typical hrc.
Hrc fuselink range is available in 14x51 cylindrical, din and bs type. Construction and features range overview switch disconnector fuse 2. Lv hrc fuse bases 1pole busbar mounting ac 690v sizes 002 160a400a 88 product definition lv hrc fuse bases for busbar mounting are stan dardized in accordance with din 43620 part 3. During this time if the fault is removed the fuse doesnt blow off.
The characteristic of an hrc fuse is compared with that of an induction relay. E171267izlt2 only downstream from the branch protection csa c22. Electrical faults, hrc fuses, shortcircuit currents, over currents. Fuse characteristics, terms and consideration factors continued 3. High rupturing capacity hrc fuses are totally enclosed fuses.
A timedelay fuse also known as an antisurge or slowblow fuse is designed to allow a current which is above the rated value of the fuse to flow for a short period of time without the fuse blowing. The distinguishing feature of sloblo fuses is that these fuses have additional thermal inertia designed to tolerate normal initial or startup overload pulses. Hrc fuse or high rupturing capacity fuse marine notes. Switch disconnectorswitch disconnector fuse, hrc fusefuse base. In the bolted type hrc link fuse, the conducting plates are bolted to the base of the fuse. Hrc fuse links red spot standard bolted tag up to 660vac up to 1250a red spot 400 series bolted tag up to 440vac up to 400a safeclip blade tag up to 440vac up to 125a nh din standard knife blade up to 500vac up to 630a hrc fuse.
Lv hrc fuse bases and accessories 545 fuse bases for screw or snapon mounting onto standard mounting rails. The vapour of fuse element and the powder together form the high resistive substance which extinguishes the arc. Switch disconnectorswitch disconnector fuse, hrc fuse. It is a interrupting medium to a high capacity current in a circuit to. Hrc fuse consist of a fuse wire in it, which carries the short circuit current to a limited period of time.
A silver current carrying element is welded to these metal end caps. There is also a presence of a switch through which the fuse can be removed without getting an. Electrical fuse hrc fuse high rupturing capacity electrical4u. They are quite reliable and can be selected for proper discrimination. Metcalf, in the late 1930s consists of applying overlay spots of special low melting alloy onto the fuse element.
In north america, fuses are required to clear only their rated voltage. M effect bussmann high voltage fuse links include meffect as a design feature to enhance performance. It consists of fuse wire which is designed according to the customers requirement and the rest of the design depends upon it. 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. There is a small overlap zone between the overload and shortcircuit modes of operation, where the fuse may or may not act in the currentlimiting mode.
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