The characteristics of the limiter are matched to the size of cable so that the limiter clears a fault before the cable insulation is damaged. However, any such breaker sold today does have one flaw. Some vehicles use a dual 12/42 V DC electrical system that will require a fuse rated at 58 V DC. External trip indicator — similar function to striker pin, but can be externally attached (using clips) to a compatible fuse. Meaning of FUSE. To unite as if by melting together; blend. Automotive glass fuses were made in different lengths, to prevent high-rated fuses being installed in a circuit intended for a lower rating. Where several fuses are connected in series at the various levels of a power distribution system, it is desirable to blow (clear) only the fuse (or other overcurrent device) electrically closest to the fault. These type of fuses may have an impact pin to operate a switch mechanism, so that all three phases are interrupted if any one fuse blows. Indicating pin or striker pin — extends out of the fuse cap when the element is blown. There are two styles of fuse base that can be screwed into these units: one designed for rewirable fusewire carriers and one designed for cartridge fuse carriers. , Edison base (left) and Type S fuses (right), An older fuse box of the type used in North America, Some companies manufacture resettable miniature thermal circuit breakers, which screw into a fuse socket. A fuse is an automatic disconnection of supply which is frequently shortened to … Fuses designed for soldering to a printed circuit board have radial or axial wire leads. Define electrical fuse. All fuses of different technologies tested to meet IEC standards will have similar time-current characteristics, which simplifies design and maintenance. Glass cartridge and plug fuses allow direct inspection of the fusible element. A cartridge fuse found in amperage sizes 60amp or lower. Ceramic fuses have the advantage of a higher breaking capacity, facilitating their use in circuits with higher current and voltage. Bits of glass fused in a kiln; atomic nuclei that are fused together inside the stars. Its essential component is a metal wire or strip that melts when too much current flows, which interrupts the circuit in which it is connected. Fuse is the less expensive, effective, simple and high degree of safety device in circuit protection. The fuse breaks the circuit if a fault in an appliance causes too much current to flow. As nouns the difference between fuze and fuse is that fuze is an alternative spelling of fuse in the sense of a detonator while fuse is (also'' fuze ''in us ) a cord that, when lit, conveys the fire to some explosive device. The fuse element is made of zinc, copper, silver, aluminum, or alloys among these or other various metals to provide stable and predictable characteristics. A fuse is an automatic means of removing power from a faulty system; often abbreviated to ADS (Automatic Disconnection of Supply). Top Definition. It is used, for example, in networks where multiple cables may be used in parallel. To receive news and special offers, please register here. The device is included with a metal strip where it gets dissolved when there is a flow of an extended range of current values. While in this state, the breaker is effectively useless: it does not provide any overcurrent protection.. In the UK, older electrical consumer units (also called fuse boxes) are fitted either with semi-enclosed (rewirable) fuses (BS 3036) or cartridge fuses (BS 1361). Definition of electrical fuse in the Definitions.net dictionary. Such tampering will not be visible without full inspection of the fuse. The International Electrotechnical Commission publishes standard 60269 for low-voltage power fuses. A proximity fuze is a fuze that detonates an explosive device automatically when the distance to the target becomes smaller than a predetermined value, or when the fuze and the target pass by each other. 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 speed. The time and current operating characteristics of fuses are chosen to provide adequate protection without needless interruption. A fuse is a safety device in an electric plug or circuit. This article, we discuss Electrical Fuse, Types of Fuses, Construction, Operation, Working and … Electrical Fuse is although an old protective device but still in use due to its high operating time. International Electrotechnical Commission, polymeric positive temperature coefficient, edison.rutgers.edu/patents/ — U.S. Patent Office number 438305 "Fuse Block" (.pdf), http://lees.mit.edu/public/In_the_News/Electrical+Rebuilder's+Exchange.pdf, https://en.wikipedia.org/w/index.php?title=Fuse_(electrical)&oldid=1000285426, Articles with unsourced statements from February 2015, Wikipedia articles needing clarification from July 2020, Articles with unsourced statements from February 2019, Creative Commons Attribution-ShareAlike License, Melting of internal conductor due to heat generated by excessive current flow. Chances are that server has a currency and a shop. Same basic definition applies to medium voltage fuses. Fuses can be designed and manufactured to higher standards than the minimum standards required to pass U.L. Over the years MCBs have been made for both styles of base. A fuse is a safety device in an electric plug or circuit. High-voltage fuses of the expulsion type have fiber or glass-reinforced plastic tubes and an open end, and can have the fuse element replaced. Fuses for commercial or industrial power systems must have higher interrupting ratings, with some low-voltage current-limiting high interrupting fuses rated for 300,000 amperes. Fuse definition. Fuses can be built with different sized enclosures to prevent interchange of different ratings of fuse. The terms are often interchanged. Safety. A safety device that protects an electric circuit from excessive current, consisting of or containing a metal element that melts when current exceeds a specific amperage, thereby opening the circuit. Electrical power and choosing fuses. Not only protect the high value electrical/electronic device and also to protect human being to use this device. fuse, safety fuse. The exact fusing current is not as well controlled as an enclosed fuse, and it is extremely important to use the correct diameter and material when replacing the fuse wire, and for these reasons these fuses are slowly falling from favour. , In North America, fuses were used in buildings wired before 1960. A fuse consists of a metal strip or wire fuse element, of small cross-section compared to the circuit conductors, mounted between a pair of electrical terminals, and (usually) enclosed by a non-combustible housing. On the other hand, replacing a fuse without isolating the circuit first (most building wiring designs do not provide individual isolation switches for each fuse) can be dangerous in itself, particularly if the fault is a short circuit. Information and translations of FUSE in the most comprehensive dictionary definitions resource on the web. Thermal fuses are a 'one shot', non-resettable device which must be replaced once they have been activated (blown). These devices are often used in aerospace/nuclear applications where replacement is difficult, or on a computer motherboard so that a shorted mouse or keyboard does not cause motherboard damage. The size and construction of the element is (empirically) determined so that the heat produced for a normal current does not cause the element to attain a high temperature. Fuse definition is - to reduce to a liquid or plastic state by heat. In the field of electronics or electrical, a fuse is considered as the most crucial device which is employed in various electrical circuits that give protection from the overcurrent conditions. Fuses are always connected in series with the component(s) to be protected from overcurrent, so that when the fuse blows (opens) it will open the entire circuit and stop current through the component(s). These fuses area unit necessary and guarantee correct circuit wiring and electrical protection. Another word for fuse. Ambient temperature will change a fuse's operational parameters. The standard ampere ratings for fuses (and circuit breakers) in USA/Canada are considered 15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 110, 125, 150, 175, 200, 225, 250, 300, 350, 400, 450, 500, 600, 700, 800, 1000, 1200, 1600, 2000, 2500, 3000, 4000, 5000, and 6000 amperes. translation and definition "fuse", Dictionary English-English online. fuse /fjuːz/ Definitions. Fuses are the precursor to modern breakers. Existing Edison fuse boards can easily be converted to only accept Rejection Base (Type S) fuses, by screwing-in a tamper-proof adapter. Voltage drop often is not significant in more traditional wire type fuses, but can be significant in other technologies such as resettable (PPTC) type fuses. If you are asked for a cartridge safety switch, it refers to a 60 or 30amp switch. Semi-enclosed fuses are fuse wire carriers in which the fusible wire itself can be replaced. Some manufacturers of medium-voltage distribution fuses combine the overcurrent protection characteristics of the fusible element with the flexibility of relay protection by adding a pyrotechnic device to the fuse operated by external protective relays. Special current-limiting fuses are applied ahead of some molded-case breakers to protect the breakers in low-voltage power circuits with high short-circuit levels. It contains a piece of wire... | Meaning, pronunciation, translations and examples Fuze Fuze (? Pole-mounted distribution transformers are nearly always protected by a fusible cutout, which can have the fuse element replaced using live-line maintenance tools. In an explosive, pyrotechnic device, or military munition, a fuse (or fuze) is the part of the device that initiates function. The design does not allow for fitting of RCDs or RCBOs. Go to that shop and buy a test generator if available and recycle it for two fuses. A time-delay fuse (also known as an anti-surge or slow-blow 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. en.wiktionary.org (also fuze in US) A cord that, when lit, conveys the fire to some explosive device. Fuses contain a length of thin wire (usually of a metal alloy) that melts and breaks the circuit if too much current flows through it. Couple reasons to use fuses. The clearing I2t is proportional to the total energy let through by the fuse when clearing a fault. As nouns the difference between fuze and fuse is that fuze is an alternative spelling of fuse in the sense of a detonator while fuse is (also'' fuze ''in us ) a cord that, when lit, conveys the fire to some explosive device. Some types of distribution switchgear use fuse links immersed in the oil that fills the equipment. A miniature time-delay 250 V fuse that will interrupt a 0.3 A current at after 100 s, or a 15 A current in 0.1 s. 32 mm (1 1/4") long. en.wiktionary.org (manufacturing, mining, military) The mechanism that ignites the charge in an explosive device. See fuze. Element window — a small window built into the fuse body to provide visual indication of a blown element. The blown fuse must be replaced with a new device which is less convenient than simply resetting a breaker and therefore likely to discourage people from ignoring faults. IEC and UL nomenclature varies slightly. A fuse rated for 1 A at 25 °C may conduct up to 10% or 20% more current at −40 °C and may open at 80% of its rated value at 100 °C. Find more ways to say fuse, along with related words, antonyms and example phrases at Thesaurus.com, the world's most trusted free thesaurus. Fuses are sacrificial devices used to protect much more expensive electrical components from the damaging effects of overcurrent. Electrical fuses play the role of miniature circuit breakers. A cord of readily combustible material that is lighted at one end to carry a flame along its length to detonate an explosive at the other end. Fuses for high-voltage equipment, up to 115,000 volts, are rated by the total apparent power (megavolt-amperes, MVA) of the fault level on the circuit. In electronics and electrical engineering, a fuse (from the French fusée, Italian fuso, "spindle" ) is a type of low resistance resistor that acts as a sacrificial device to provide overcurrent protection, of either the load or source circuit. It comprises a strip or a metal wire that dissolves when the heavy flow of current supplies through it. in transformer stations, main distribution boards, or in building junction boxes and as meter fuses. Swe-Check: The Circuit Protection Specialists. Medium-voltage fuses are also used to protect motors, capacitor banks and transformers and may be mounted in metal enclosed switchgear, or (rarely in new designs) on open switchboards. cartridge fuse - a fuse cased in a tube. Fuses only sense overcurrent, or to a degree, over-temperature, and cannot usually be used independently with protective relaying to provide more advanced protective functions, for example, ground fault detection. Some fuses for medium-voltage applications use two or three separate barrels and two or three fuse elements in parallel. In some countries, because of the high fault current available where these fuses are used, local regulations may permit only trained personnel to change these fuses. For example, UL 248-19 allows photovoltaic fuses to be rated up to 1500 volts, DC, versus 1000 volts under the general requirements. The associated high pressure (often greater than 100 atmospheres) and cooling gases rapidly quench the resulting arc. Upgrading Your Electrical Service . Surface mount fuses have solder pads instead of leads. Renewable fuses have replaceable fuse elements, allowing the fuse body and terminals to be reused if not damaged after a fuse operation. The device can be used to prevent a fire in a hair dryer for example, by cutting off the power supply to the heater elements when the air flow is interrupted (e.g., the blower motor stops or the air intake becomes accidentally blocked). Automotive fuses can be mounted in fuse blocks, inline fuse holders, or fuse clips. For example, a glass tube fuse rated at 32 volts would not reliably interrupt current from a voltage source of 120 or 230 V. If a 32 V fuse attempts to interrupt the 120 or 230 V source, an arc may result. Fuses have been used as essential safety devices from the early days of electrical engineering. Silica sand or non-conducting liquids may be used. In this article, we will discuss the different types of fuses, its construction, working and operation and their application in various electronics and electrical systems. Fuse definition, a tube, cord, or the like, filled or saturated with combustible matter, for igniting an explosive. … Some cartridge fuses are manufactured with end caps of different sizes to prevent accidental insertion of the wrong fuse rating in a holder, giving them a bottle shape. Definition of fuse written for English Language Learners from the Merriam-Webster Learner's Dictionary with audio pronunciations, usage examples, and count/noncount noun labels. to change a fuse; Check whether a fuse has blown. When the surrounding temperature gets too high, the composition melts and allows the spring contact mechanism to break the circuit. en.wiktionary.org (manufacturing, mining, military) The mechanism that ignites the charge in an explosive device. Fuses for small, low-voltage, usually residential, wiring systems are commonly rated, in North American practice, to interrupt 10,000 amperes. To prevent installation of fuses with an excessive current rating, later fuse boxes included rejection features in the fuse-holder socket, commonly known as Rejection Base (Type S fuses) which have smaller diameters that vary depending on the rating of the fuse. EATON’s medium voltage expulsion fuses provide full-range fault protection for both indoor and outdoor, medium … For example, bottle style fuses distinguish between ratings with different cap diameters. If there is a short or fault anywhere in the circuit, or the circuit is overloaded, the metal strip, or link, heats up and quickly melts, opening the circuit and shutting off the power. The family of # articles includes igniters, cartridges, both explosive and shaped charges, cutters, detonators, fireworks, flares, fuse, fuzes, grenades, igniters, primers, release devices and signals of all types. Electric fuse was invented by Thomas Alva Edison in 1890. to the existing carrier. noun the hole in a shell prepared for the reception of the fuse. IEC standards refer to a "fuse" as the assembly of a fusible link and a fuse holder. Some automotive fuses are occasionally used in non-automotive electrical applications. Filling a fuse body with sand provides additional cooling of the arc and increases the breaking capacity of the fuse. Fuses are used on power systems up to 115,000 volts AC. If too high a current flows, the element rises to a higher temperature and either directly melts, or else melts a soldered joint within the fuse, opening the circuit. It may be installed in a circuit-breaker box with a door. Electrical fuses play the role of miniature circuit breakers. For coordination of fuse operation with upstream or downstream devices, both melting I2t and clearing I2t are specified. UL 248-1 sets the general requirements for fuses, while the latter parts are dedicated to specific fuses sizes (ex: 248-8 for Class J, 248-10 for Class L), or for categories of fuses with unique properties (ex: 248-13 for semiconductor fuses, 248-19 for photovoltaic fuses).