Plavikovy zapobіzhnik. Fusible zapobіzhnik vibіr drot for repair. Fuse material

Attachment, which is made up of a fusible metal element near a thin plate that looks like a body with a contact attachment, is called a protector. Vіn appointments for zakhistu elektrichnyh lanceugіv vіd strumіv navantazhennya that short zamikannya.

Trivale piercing the struma is the normal mode of robotic melting of the insert. Ale zbіlshennyam navantazhennya vshe nominalіnіnіnі ї chi viniknennya short zamikannya (I merezі >I insertion) metal is heated to the melting temperature і, melting, rozryvaє lansyug. On vіdminu vіd melting insert є disposable and with її spratsovuvannі pіdlyagaє zameni for a new one.

We prepare fusible inserts, as a rule, with an alloy of lead with middue, with tin, and also with other metals. Mid inserts before installation are tinned, so that the oxidation of the metal and the deterioration of the yogo conductive qualities disappear. The stench mayut a small transverse cut, so that a small opir may be drawn. There is a large number of guards to finish off with arc-extinguishing locks in the middle of the body (for example, fiber or quartz sand). A strum, which is a fusible insert, is called a nominal strum fusible insert of the I insert, on the basis of the nominal fuse of the I fuse. , for which I will build a strum-conducting part, as well as contacts and arc extinguishers.

The hour of burnout of the fusible insert to lie in the struma that flows through it, and the fallowness of this struma in the hour of burnout t = f (I) is called the characteristic characteristic. Vaughn is shown below:

The small picture shows the characteristics of two different zapobіzhnikіv 1 and 2. Won't have different nominal strums and how much from the graph with one and the same strum revantage of attachments 1 to burn out more low 2. Tsya power allows to secure the selective defense of electric lancers.

Behind the constructive features, you can see tubular parts and cork fittings.

Tubular parts are closed with casings made of gas-generating material fibri, at elevated temperatures, the pipes create a great pressure in the pipes for the fluff of which the opening of the lansyug is expected. Zapobіzhnik type PR:

De: 1 - flashing contacts, 2 - brass caps, 3 - brass rings, 4 - fuse insert, 5 - fiber tube.

Such an attachment is made up of a melting insert 4, so that it is inserted into a fiber tube of a random type 5, reinforced with end brass rings 2, and contacts 1 flicker.

Cork zastosovuyut, as a rule, in lighting installations for zahistu butovykh spozhivachіv (electric chillers), as well as for electric motors in low and medium pressure. By the method of fastening with a fusible insert, the stench is blown out of the tubular parts.

This is how the defenders prove that they self-respect. The essence of their work is that with the heated stench they sharply change their opera in the bik, which is mindful of the development of the lancer. As soon as the temperature drops to the operating temperature, the opir changes and the lance starts to flash again. Polymeric materials are taken as the basis of their design, which can be crystalline under normal temperature conditions and sharply turn into an amorphous state when heated.

Such zapobіzhniki have developed a wide range in digital technology (computers, mobile phones, APCS systems). Looking back at the great versatility of the power lancers, as a rule, you don’t get stuck. The stench is more rude, for those who don’t need to replace it after the opening of the lancet.

To finish a lot of electrics, to avoid the frequent burnout of fusible inserts, to scatter so called “bugs” - to replace a special alloy with a fusible insert, to attach a wonderful drіt of a small peretina. There is no trace of this work, because the hour of burnout of the alloy and the remarkable dross of such a cut can be greatly irritated, which can lead to summative results. That is why you often ask for helpers, you should set the reason for the help, and not try to be rude with the way of installing "bugs".

You can also marvel at the power to protect the robot here:

A fusible protector is a one-time component of power electronics, which defeats its function. The smooth -fellabox є Naslabshiye eektric Lancyuga, Shcho, in the audit regime, Tim Rozrivaychi Lancyug I Znobygayuchi, the Ruinuvanni Bilsh Tsinnye Electric Lancyuga, Viklikana abusive, was in violica aborrine.

In an electric lance, a fusible protector is a weak electric stake, which burns in emergency mode, thereby opening the lance and intimidating the distant rushing with a high temperature.

Swimming boots are divided into the following types:

1. low voltage inserts(For small electrical appliances up to 6 amps)

• 3x15
• 10x30

2. forks(for the purchase of electric cars)

• miniatures
• fork

3. corks(Zustrichayutsya in the residential sector, up to 63 amperes)

• DIAZED (the widest in the SRSR)
• NEOZED

4. knives(Up to 1250 amps)

• size 000 (up to 100 amperes)
• size 00 (up to 160 amperes)
• size 0 (up to 250 amperes)
• size 1 (up to 355 amperes)
• size 2 (up to 500 amperes)
• size 3 (up to 800 amperes)
• size 4a (up to 1250 amperes)

5. quartz

6. gas generating

So the very melting zapobіzhniki differ for the characteristics of spratsovuvannya schodo nominal strum. Due to the inertness of the spratsovuvannya fusible zapobіzhnikіv, in the professional middle of the electricians the stench often vikoristovuyutsya like a selective zahistu in pairs with automatic vimikachami. The selectivity between the fusible inserts themselves reaches the ratio of 1:1.6 [ibid.], the hour-strum characteristic of the fusible fuses is restored to fallow in I²t; PUE regulates the protection of the wired lines in such a way that the defender spratsovuva in 15 seconds (strum short zamikannya in the end of the line is responsible for ending the trip with the nominal streams of the defender). Іtotnoy value of є hour, stretching out of such a way the conductor is ruined when the installed struma is moved. With the method of changing this hour, the deacons of melting zapobіzhniki avenge the spring of the front tension. Tsya spring is also to open the ends of a zruynovanogo conductor, zapobіgayuchi vyniknennya arc.

40-amp protectors with "gG" rating, equal "PPN" rating

• melting insert - an element that can replace a part of an electric lance
• the mechanism of fastening the fusible insert to the contacts, which ensures the inclusion of the fuse in the electric lance and the installation of the fuse with a flame.

Cases of fusible zapobіzhnikіv sound are made from high grades of special ceramics (porcelain, steatite or corundum-mulіtova ceramics). For corps zapobіzhnikіv with small nominal streams, there is a special slope. The body of the fusible insert, indicate the role of the base part, for this strengthening the fusible element with the contacts of the fusible insert, the indicator of the spratsovuvannya, the free contacts, the extension for operating the fusible insert, and the plate with nominal data. At one hour the body vikonu functions of extinguishing the chamber of the electric arc.

Marking of fusible guards

The first letter means the range of zakhistu:

• a - partial range
• g - full range
• h - high-rise buildings (pipes made from white or gray ceramics)

Another letter means the type of possession that is being protected:

• G - a universal protector for the protection of various types of equipment: cables, electric motors, transformers
• L - protection of cables and other outbuildings
• B - zahist of the garnish
• F - zahist of small lancers
• M - for lancers of electric motors and vimic attachments
• R
• S - flashing light with a short flicker and the middle hour of burning when overwhelmed
• Tr - protection of transformers

Fusible zapobіzhnik– tse virіb, appointments for zahistu elektropriladіv way including the supply of electricity to them when the admissible value of the struma is transferred by the method of melting the calibrated rod inserted into the zahіbіzhnik.

For the protection of electrical wiring and expensive radio equipment in the form of a short circuit, throwing a stream in the measure of life, and ensuring the safe operation of electrical appliances, fuse-links are widely used. The stench is released from various designs, typifying that on the be-yakі strum zakhistu.

The technology for the repair of zapobіzhnikіv has been reviewed for the completion of all minds to ensure its proper functioning. Ale not leather can work with a soldering iron and adjust the diameter of the dart. That and be it once again the zapobіzhnik of the industrial preparation is more practical.

Previously, the apartment electrical wiring was stolen exclusively for the help of fusible guards, installed at the cork. At this hour, for the wiring of the electric wiring, the nadіynishu bagatorazovy put on the zakhistu in the short zamikan – automatic vimikachi. So far, nothing has been invented in electric devices, a short zahistu in short chimes, a lower fusible zapobіzhnik. Particularly relevant is the fusibility of fusible guards in cars, stink shards are the only reliable and cheap way to protect yourself from a short flicker.

Smarter graphic designation
fusible protector

The smarter graphic designation of a fusible support on the diagrams is similar to the designation of a support and it only works if the line does not pass through the middle of the rectangle. The order of the mental cognitions is to be written in the letter of the cognition Pr. or F. Others on the diagrams simply write thermal fuse chi fuse. After letters often indicate the strum of the defender, for example, F 1 A, it means that in the scheme of insertions the guardian of the strum of the defender is 1 ampere.

During operation, the guards go out of tune, and they have to be replaced with new ones. It is important that the guards do not make repairs. Ale, even before the repair is done competently, then it’s practical, whether it’s a zapobіzhnik, you can successfully repair and repair it again. The age of the body of the defender is overfilled with cilim, and it burns out only a thin calibration of the drill, placements in the middle of the body. If you dream, if you burn out, replace it with the same one, then the defender can serve far away.

The principle of working as a protector on a video clip

During the passage of an electric jet, the smaller beyond the marginally permissible, the calibration of the drіt, which connects the contacts of the protector, heats up to a temperature of about 70˚С. At the time of the change of the struma to the nominal value of the protector, the drіt begins to heat up more strongly and at the reaching temperature of the melting point of the metal, from which it is crushed, it melts, the electric lance rises, and the struma is overheated.

To that zapobіzhnik i was called fusible or fusible insert. A video clip of performances in a povіlnomu vglyadі, shchob was kindly seen, as if the blown out of the dart in the zapobіzhnik. In real minds, the guardian burns out mayzhe mittevo.

Zapobіzhnik protects from moving the struma to the port and, if the value of the voltage of the lifeline is not significant, in the case of installations, it can be a 1.5 V battery, that car battery is 12 V or 24 V, the voltage is 220 V, the three-phase voltage is on 380 Art. So you can install one and the same guard, for example, with a nominal value of 1 A and in the well of the guard in the car, and in the lighter, and in the rose under the shield of 380 V. the given strum in the lance, in the guard, through heating, the wood is melted.

The main reasons for the exit from the fret of the guardian are two, through throws of the voltage of life, or a breakdown in the middle of the radio equipment itself. Rarely, ale, the guardians of the zapobіzhnik chime in and through the filth of yoga.

Too many people think that the zapobіzhnik repair does not work. Ale tse zovsі so. In an emergency situation, if you don’t have a spare hand, for example, through a car, which should be done at a high price, or if it’s low, and there will be a musical support for a high school ball or a fun, and all shops are already closed, you don’t have to choose.

With a competent approach, you can successfully restore for the timchas vikoristannya until you replace the new guard, which you have burned out, having saved your own functions. In most cases, such problems are overcome by banal zamikannyam contacts in the hairdresser of the guardian, be a kind of dart, and even worse, just insert a substitute for the guardian of the flowers, or a piece of tovstoy dart. So the solution can be all zіpsuvati and priyaє vyniknennyu pozhezhі.

Types of fusible guards

For the recognition of that design of the melting point, the guards are of the following types:

• Videlkov (mainly for the protection of electrical wiring and accessories in cars);
• Zі low-current inserts for zakhistu elektropriladіv zі strum spozhivannya up to 6 amperes;
• Cork (installed at the shields of the living houses, rozrakhovan on strum up to 63 amperes);
• Knives (stay at the tradesman's expense at a surge of up to 1250 amperes);
• gas generating;
• Quartz.

The repair technology reviewed by the article is recognized for the replacement of fork, low-voltage inserts, cork and knife-type inserts.

Tubular parts of melting pipes

The protector of a tubular structure is a glass or ceramic tube, closed from the ends with metal caps, yakі z'ednani between itself with a rod calibrated in diameter, which should pass through the middle of the tube. The ethereal look of the tubular guards of Vi Bachite in the photograph.

To kovpachkіv drіt varyuєtsya spot zvaryuvannyam or soldered solder. In zapobіzhniki, razrahovanyh on the great stream, often empty in the middle of the tubes fill with quartz squeak.

Car trunks

Zapobіzhniki in cars rarely get out of tune. Sound less at the vapadkas, if possessed by the master. Most often when the headlight bulbs burn out. On the right, if the thread of the flame is cut off at the light bulb, the Voltaic arc becomes established, the thread burns and becomes short, the opir changes sharply and the size of the struma increases in size.

Buvay, the fusible protector in the car burns out and when the smokers are jammed. Rіdshe for short flickers in the electrical wiring. In the photo you can see the car bottoms of the knife (fork) type, which are widely used. Under the skin zapobіzhnik induced strum zakhistu in amperes.

Zapobіzhnik, scho burned out, in the car should be replaced with a zapobіzhnik of the same denomination, but you can also repair it, replacing the burnouts in order to protect the middle diameter. The voltage of the side rail of the car is not significant. Golovnya - strumu zahistu. As it is important to designate the denomination of the burnt zapobіzhnik, then you can speed up the color markings.

Colirne marking of car zapobіzhniki

Formula for rozrahunka diameter
for the power of the electrical appliance

Pressure is often indicated on labels, as if they were glued on the veils. If the tension is shown on the contrary, then it is possible to develop the nominal strum of the defender according to the formula below.

Ale richly richly rich with ready-made tributes from the table. To give respect, the first table to serve for the selection of the denomination of the driver of the batteries, which live in the 220 V on-board electric circuit, and the friend for the vibrations, which are victorious in cars with a 12 V voltage onboard circuit.

Table for choosing the rating of the heater in the fallow in terms of pressure relief of the electric appliance at a voltage of 220 V

Let's take a look at the butt as a vibirat zapobіzhnik.
TB stopped working after the storm. Signed that the zapobіzhnik died. The denomination of yoga is not given. On the label of the back cover it is written that the power is reduced to 120 W, but it is written that it is 120 VA. Tse oznachennya odnієї і ієї w tightness, but beyond the standards of different regions. According to the table, it appears that for electrical appliances with a maximum reduced power of 120 W (the closest value is 150 W) is a 1 A derating factor.

The method for choosing a guard for the on-board electrical wiring of a car is not affected by the choice of 220 V on-board electrical wiring.

Table for choosing the rating of the winder in the fallage in terms of pressure reduction of the electric appliance at a voltage of 12 V (vehicle side railing)

As if after two replacements, the guards burned out, which means that the electric appliance was damaged and it was necessary to repair it. Trying to install a guard on a larger strum can only be done by the owner of a supplementary shkoda to the point of inapplicability to repair.

Calculator

As there is no data in the tables for your voltage, for example, the voltage of life can be set to 24 or 110 V, then you can do it yourself with the help of the online calculator provided below.

Pіd hour rozrahunku on the calculator You take the exact value of the struma. It is necessary for the hopeful work of the protector that the par value of the letter is not less than 5% more. For example, in order to take away the value of the struma of 1 A, it is necessary to take the zapobіzhnik of the largest nearest denomination from the standard series, tobto 2 A.

Sometimes try to find the denomination of the zapobіzhnika of reading the information not to go. There is no writing on the electric device, the marking is not readable on the receiver. For the presence of the ammeter and the knowledge of the work with it, then by viyav zabіzhnik and connecting the ammeter to the contacts of the block, in which the zabіzhnik was installed, you can vimіryuvati strum and at the same time determine the value of the value.

Ale here is an underwater stone. If the zapobіzhnik viyshov is out of tune through the inadequacy of the electrical appliance, then the strum can be richer, the lower one is to blame, for the addition you can bring the vimiryuvalny appliqué out of tune.

Rozrahunok diameter drotu fusible zapobіzhnika

For the repair of the guard, it is necessary to replace the old one, which has burned out. When virobniztv zapobіzhnikіv at vicorist plants, fallow in the size of the struma and swidkodії, calibrated silver, midi, aluminum, nickel, tin, lead and darts from other metals.

For the preparation of a zapobіzhnik at home minds, only a red copper of a calibrated diameter is available. All electrical wires are made of midi, and more elastic wire, thinner conductors and more strength. That is why the whole technology is proponated below, oriented to the stosuvanya of the honey dart.

When choosing a zapobіzhnik of equipment, the retailers are koristuyutsya by a simple law. Strum zapobіzhnika is guilty buti greater for the maximum spozhivanija virіb. For example, if the maximum strum of the booster is set to 5 amperes, the booster is selected by 10 amperes. First of all, it is necessary to know on the body of the protector of this mark, from which one can be recognized, which is the strum of repayments. Often, the size of the struma is written on the body of the viroba by entrusting it to the place of installation of the guard. Let's use the table below to determine which diameter the wire is needed.

Tables for choosing the diameter of the dart
zalezhno vіd struma zakhistu zapobіzhnik

For repair of zapobіzhnikіv on strum zakhistu vіd 0.25 to 50 amperes

For repair of zapobіzhnikіv on strum zakhistu vіd 60 to 300 Amperes

Formula for rozrahunka diameter of the mid-dart
for the patron

To determine more exact values ​​of the diameter of the mid-range dart for the repair of the guard, otherwise the guard is needed for a strum defense, the value of which is not available in the table, you can speed it up with the formula below.

How to win the diameter of the dart

The diameter of a thin dart is best measured with a micrometer. Even if you don’t have a micrometer under your hand to measure the diameter of the dart, you can speed up with a great line.

It is necessary to wind 10-20 turns up to a turn of the wire on a line, divide the number of closed millimeters into the number of wound turns. Subtract the diameter. For example, I have wound 10 turns of darts, and the stench closed 6.5 mm. Dilimo 6.5 by 10. The diameter of the dart comes out equal to 0.65 mm. 0.05mm occupies insulation. Also set the real diameter to 0.6 mm.

Such a guide for the preparation of a guard for 30 A. Conduct a winding for greater accuracy. The more you wind the coils on the line, the more accurate the result is. It is necessary to wind less than one centimeter. As if it’s a small dozhini, then wind it on a shear, for example, a twist, a toothpick or an olive, and with a ruler, measure the width of the winding.

The results of the simulation can be processed with the help of an online calculator. To determine the diameter of the dart, it is enough to enter the width of the winding, the number of turns and press "Expand the diameter of the dart" in the end.

Do-it-yourself fusible protector repair

Repair of a tube fusible zapobіzhnik

The first is the simplest. Drіt is cleaned to a glare and wound on the skin cup of a sprat of vitkіv, then the protector is inserted into the utrimuvach. This way is not superior, and you can speed up with it like a timely call. The advantages of their simplicity allow you to quickly check the correctness of the electrical appliance. Yakscho pіd hіmknennya drіt rozplavlivsya, mean on the right not in favor, і need more qualification repairs.

Another way is cheaply foldable. Ale tezh not vimagaє zastosuvannya soldering. It is necessary to warm through the cups with an igniter or with a gas stove and take them out of the glass tube through the fabric with your hands. You can heat it up with a soldering iron. The middle cups for good contact must be thoroughly cleaned of excess glue.

Pass the stripped insulation through the tube diagonally, bend the ends of the tube and put on the bowl of the cup. The fusible guard has been repaired.

The third way is essentially the same, like the first two. Ale v_dremontovaniya zapobіzhnik a little vіdіznyaєtsya vіd new. Repair vykonuєtsya in this way.

The factory calibration, when prepared, will seep into the opening at the ends of the cups and fix with solder. In order to insert a new drill, it is necessary to solder the ends of the cups with a soldering iron and use a toothpick or open the ends of the cups with solder with a sharpened stick. They gave a more detailed description of the factory operation.

Open the cups with a small diameter and clean them easily with solder. Todi for the obvious technical feasibility, it is easier to drill open with a drilled diameter of 1-2 mm or expand with a faceted awl

The technology for the repair of fuses and fusible inserts has been approved, but it can be successfully installed for the renovation of practically any types of fusible fuses.

Repair of a knife-type car protector

The technology for the repair of a car protector is in no way comparable to the technology for the repair of a tubular one, it’s simpler, that it’s not necessary to do this sorting.

Use an emery paper on the back with a file to clean the knives of the guardian of white, put the husband’s sprat on the millimeters and tin it with solder.

Under the hour of zaluzhuvannya zatknuvsya s scho, when vikoristannі alcohol-rosin flux solders do not want to spread on the surface of the knives. I had a chance to zastosuvat flux "FIM", appointments for soldering midi, sribl, constantan, platinum and black metals. The basis of the flux is phosphoric acid. I’ll start a vicorous one for soldering, as rosin is not suitable. Surpluses of flux FIM are seen by washing with water.

Zapobіzhnik buv razrahovany strum zakhistu 10 A, this is evident from the table for the repair of buv taking wire ⌀0.25 mm. I will spend the bula on the shape of the loop, as shown in the photograph, and the end of the tinning with solder.

After all the preparatory work, it was not enough to make a loop of the dart in the middle of the guard’s body and solder the ends to the bottom.

Solder, which has risen, you can see with a knife, see for help with an emery paper, or grind it off with a needle file.

The car protector has been repaired, and now it can be re-wired for the protection of the car's electrical wiring. As soon as the installation of a repaired windscreen protector is necessary, it is necessary to report a fault in the electric car.

How to make an indicator of a burnout of a zapobіzhnik with your own hands

For sale є zapobіzhniki with an indicator of їх inaccuracies. At the body of the guard, a miniature light bulb is installed, or a light bulb, which starts to glow at the hour of the burnout of the guard. You can pick up such an indicator of a car fuse burnout with your own hands for the electrical circuit shown below in the photograph.

For which it is sufficient to run parallel to the contacts of the fuse, whether it be a light diode VD1 through a streaming resistor R1 or a miniature light bulb, rozaryovana on 12 V. Another option is shorter, when you change the indicator, the shards will be lost on the field. The indicator does not light up in case of a burnt-out burner, because the connection is not connected.

Shown in the photograph is a diagram of an indicator of a burnout of a burner, or an automatic vimikacha can be successfully operated in a by-butovy electric circuit at a voltage of 220 V.

It is enough to increase the nominal value of the resistor R1 up to 300-500 kOhm and for the protection of the light diode VD1 in the event of a voltage breakdown, supplement the circuit with a VD2 diode of any type, rated for a return voltage of at least 300 V.

For a measure of a 220 V strum, you can install an indicator of a blown-out lamp or an automatic heater on a neon lamp.

One of the most important components of the strum system, which performs its function, is the protector. These attachments are found in different configurations and may be impersonal models. Tsya statya rozpo_st about fusible zapobіzhnik. The skin unit has its own strum-conducting elements, and the strum-conducting element takes an important part in the stable robotic electric coils. Understand the fusible zapobіzhnik and fusible insert may have a sprat of different designation. Tsya stattya will help to understand the tsyu vіdminnіst.

Principle dії

The basic peculiarity of the zapobіzhnik lies in the fact that the light of the fire in the electric lance is much earlier than the lower elements. In a different haircut, the strum of an electric lansyug, the zapobіzhnik is richer and easier to replace, lower to change the strum-conducting darts, the microcircuits are thinner.

I will name the fusible element otrimav, oskіlki the main element of the design - fusible insert. This component has a low melting point value, according to the Joule-Lenz law, when the struma passes through the conductor, thermal energy is seen in the new one, and for the high value of the struma, which is unsafe for other components, it burns. Tse lead up to the opening of the electric stake. In such a rank, the guardian protects from damage to the elements of the electrical circuit.

Modes of work of the fusible protector:

• Short chime:
  • Burning fusible inserts of the fuse will be fired in the shortest possible hour;
• Revantation:
  • Burning fusible inserts are fired for the song hour, which is to lie in the size of the struma in this mode. The greater the strum of vanity, the more shvid the zapobіzhnik burns.
• Normal mode. I will heat up by the process, in a way:
  • Vіdbuvaєtsya povne nagrіvannya up to a specific temperature and vіddacha kіlkostі vіdіlenoї heat;
  • Leather zapobіzhnik may be recognized from the nominal value of the struma;
  • Necessary selection of the element to be melted, with the strum of the nominal mode.

When choosing a necessary guardian, it is necessary to look not only at the indicated size of the struma indicated on the case. Ale is also permissible working voltage and chastokov characteristic.

The hourly characteristic is necessary to show the magnitude of the change in the hour of the new opening of the lancet when the struma is given a singing value.

Construction

The main element to enter the warehouse of the customer is a fusible insert. These inserts can be impersonal configurations, but can be two basic elements:

• The fusible element is vikonanie from the metal of various metals, or it is vikonuetsya with specially selected metals.

Melting inserts are made from different materials:

1. zinc;
2. lead;
3. mid;
4. tin;
5. sriblo.

• The case is a block that can accommodate a complex of fixed elements, which allows connecting a switching element to an electric stake.

Cases are built with various types of ceramics, such as:

1. porcelain;
2. corundum-mulite ceramics;
3. steatite.

When vikoristanny elektrozabіzhnikіv іz small strumom rated mode case vykonuєtsya іz special glasses.

To the main parameters that characterize the swimming trunks, one can see:

1. Rated voltage;
2. nominal stream;
3. maximum tightness;
4. shvidkіst spratsovuvannya.

All qi factors need to be vrakhovuvat when rozrahunka melting inserts.

Razrahunok fusible value of the nominal struma to be carried out according to the formula 1:

Three formulas, for the expansion, it is necessary to know U - voltage, Pmax - maximum stress tension.

See the defenders

The main and most important stage is the choice of fusible inserts. It’s necessary, wisely, to protect the mind, in which the attacks of various electric shocks occur:

• Electric plugs. The Danish type of stream-conducting outbuildings is often used in the lances of a standing stream. The design of the vikon is designed as a roztashuvannya of electrical contacts from one side, and a fusible part from the back.

Seeing side elements are subdivided into:

1. fork;
2. fork miniature roses.

• Electrocork protectors. One of the widest views. The construction is based on the case, made of porcelain. At the inner part of the hull, there is a thin drіt, which burns up during emergency operation. The block body has a vantage, which designates the camp of a foreign component. Leather vantage may have a singing color, which gives the struma power required. In times of yogo hanging on a dealership, a yogo replacement is needed.

Different configurations and recognition:

1. DIAZED - zastosuєmo in the system, the elements of which are fixed for various possible installation methods.
2. NEOZED - this type allows you to safely carry out the replacement of fusible elements with an unstressed steel.

The nominal jet of the fusible insert is selected, depending on the maximum tightness of the fuse.

The size of the strum_v_dpov_dno to the color of the checks

• Electric knife protectors. This variety stagnates on the lines of electrical installations, with a working size of the struma of the order of 1200 - 1300 A. In their own line, they are not safe for healthy people. The choice of such various components of the streak system leads to the most severe failure of all safety technologies. At such facilities, less personnel are trained, which may have a higher qualification.

Knife electric helper for the meaning of the struma is shared:

1. 000 (? 100 A);
2. 00 (160 A);
3. 0 (250 A);
4. 1 (355 A);
5. 2 (500 A);
6. 3 (800 A);
7. 4a (1250 A).

• Low current inserts. The main їхнє recognition - zahist of low-power electric lancers. The design has a curly hull, beating at the sight of a cylinder with metal elements, behind a jet-conducting dart. With a short flicker, a burning dart is fired, which at its edge opens the lance and saves other elements of the circuit with non-shocking elements.

Such cases are marked with different overall dimensions (mm):

1. 3 x 15;
2. 5 x 20;
3. 7 x 15;
4. 10 x 38.

If you look at the fusible guards, you should indicate that the guards are guilty of stagnating in rich electrical outbuildings, so that the damage to their elements is lost. Crim of the above said, there is no sense of respect for them, and they are not enough.

Advantages:

1. low varity;
2. at the time of the high stribka, the strumu of the electrician is constantly rozmikaє electric lansyug.
3. at the time of the exit from the fret of the guardian, it is possible to simply replace the strum-providing element.

Noodles:

1. vikoristannya zabіzhnik only once, then vikonuetsya yoga replacement;
2. replacement of a strum-conducting element with an electric shock absorber of a higher nominal value;
3. when switching three-phase electric motors, it is recommended to switch the relay of phases in order to avoid the ignition of one of the fuses.

In the rest of the hour, a lot of virobniks will stop for the development of modern standards of brightness, so that the block of the skin strum-carrying element can easily compete with European and light analogues.

In this rank, the defense of electric lancers for the help of other foreigners is one of the simplest, most expensive and cheapest ways.

Video about swimming trunks

Zapobіzhniki vikoristovuyutsya everywhere - stench є in tekhnіtsі, in different electrical outbuildings, cars, industrial property. Іsnuє impersonal visualization of these elements. Why do you need the stench now? Let's look at the main sights of the guards.

Characteristic

Zapobіzhnik is a tse zagalny term, which is to finish the stіyko vikoristovuєtsya at the galuzі elektriki. Tsya the detail is transferred for wires, possession of that electric wire.

Zapobіzhnik є switching virіb. Who has a confession? The guardian of calls to protect the electric line from high streams and short chimes. The principle of the details is even simpler - at the time of the adoption of the superstructures, there are special appointments for this element. The most common is the melting insert. So ulashtovani all see the cursed zapobіzhniks.

Qi inserts - obov'yazykovy element, without any impossibility, there is a kind of foreign elements. The middle of it is also a special arc-extinguishing attachment. Inserts in zapobіzhniki vygotovlyayutsya z porcelain or fiber corps and zakryplyuyutsya at the special part, scho to conduct an electric jet. Elements, recognized as small strums, may not mother the corps.

Melting

See the most wide-ranging ones for the vikoristanya at the bottom. Literally, the main element, which is the easiest to diagnose for correctness. For which it is necessary to simply marvel at the detail in the light - you will see that the whole melting of the insert is not.

These details are being prepared at the glass case.

Fusible tubular ceramic

This element is practically indistinguishable from a glass viroba. The only difference is in the material, from which the case is prepared. But in operation and details are not so comfortable - diagnosing "in the light" is no longer visible. For verification, it is necessary to test multimeter testers.

Melting insert LDPE

Shvidkodіyuchі zapobіzhniki

Qіrobi we are not special in any other way. Vіdminnіst is less than that, because of the fault of the short flickering, the melting of the part burns even more quickly.

smd

Qi virobi can be used in electronic attachments. Stink like a miniature. The principle of the recognition of the foreigners is to protect the technique from the high streams, which the stench can cope with miraculously.

self-renewal

Tse dosit tsіkavy solution. Zapobіzhnik, scho samoіdnovlyuєtsya, is a detail, the middle of which is known to be special plastic. As long as the plastic insert is cold, it can conduct electricity. As soon as the insert is warmed up to the right temperature, її strum-conducting power is used for the greater support.

After reaching the strum, you can again go through virib. Plus, these details are for the fact that after burnout there is no need to replace the element. Promislov_st vpuskaє ts_ virobi in different species. The stench is suitable for soldering for the technology of hanging or surface mounting. Basically, you can see vicorists in low-pressure schemes.

Vibuhovі

If everything is rehabilitated, if you know the leather, then the vibukhovy zapobіzhnik is a whole group. The process of burning out the details is ensured by an effective sound. Specially fastened to the stream-conducting parts, vibrating. Special sensors are required for the price. Stop following the strum of the electric lansyug. Tse are more accurate zapobіzhniki, because the stench is practically not to lie in the parameters of the metal on the strum-conducting part. The target element should be deposited according to the accuracy of the strum sensor.

Other types of patrons

For work in lancets, there are special autogas, gas turbines and elements of the same type. Іsnuyut navit strelyauchі zapobіzhniki. It is impossible for everyday life to be indulgent - it is more professionally established.

Marking and recognition

The leather weaver prepares zapobіzhniki under the song code chi article. The number of the customer allows you to know in the catalogs and specify the technical characteristics. Most of the qi code can be found on the cases of vibrations. The same code can be applied to the metal part. Crime codes, on the case, the main data can also be indicated - the price of the nominal stream A, the nominal voltage B, which include the characteristics or design features. For these tributes, you can count the recognition of the zapobіzhniks.

Also, the value of the nominal strum is the maximum allowable value, for which the part can function normally within a reasonable term.

Nominal voltage - this is the maximum allowable voltage, when such a part safely opens the lanyard at the time of a short flicker or overweighing in the mesh.

Including buildings are called maximum streams. With them, the guardian will work, but the hull will not be ruined.

Characteristics are called fallow time, in which the fusible element of the struma is destroyed, which flows through the part. Differently see the zapobіzhnikіv for the characteristics of the association in the group with the peculiarities of zastosuvannya and shvidkostі spratsovuvannya.

Sound, qi characteristics show on the power parts. For recognition, the letters of the Latin alphabet are used. Buildings are the first to be designated, which you see. So, G is the main range, the detail is designed to protect the lancet from overwhelming, and from the short flicker. A - the range is frequent, and so you see the guards protect only a few short chimes.

Another letter denotes the tipi of the lancer:

• G - lanceg of a slanderous confession.
• L - protection of cables, as well as other sub-systems.
• M - Zakhist lanceugs in electric motors.
• Tr - zapobіzhnik, building protection of the transformer line.

Elements with the letter R wink at once from the power of the conductors. And PV can protect against sleepy batteries.

Otzhe, we have looked, as if you see the guards, that as if the stench can be marked.