Independent release principle of work. Independent release. Automatic protective switch with independent release

Independent releasers are devices that are installed with automatic switches. Most often, the models are used with it is also important to note that the releases are capable of being operated with load switches.

Manufacturers make models at 20, 24 and 30 A. By the design of the device may differ. In order to figure it out in more detail in this matter, you should consider the standard release scheme.

Scheme of ordinary model

An independent release for has a diode rectifier. Distraters are used in various conductivity. In this case, the extensions are installed with modulators. If we consider modifications for phase switches, then the transceiver is provided. The relay is most often installed at the bottom of the structure.

Insulators are used to safely operate the release. The modulator is located contacts. Transistors are set opposite each other. Kenotrons are often applied with external winding and are attached to the modulator.

Principle of operation

How does an independent release work? This question worries many, however, the answer to it is extremely simple. In fact, the principle of operation of an independent release is built on changing the position of contacts. This is due to the supply of a short pulse from the diode rectifier. In this case, the transistor plays the role of the conductor. Due to the modulator, you can adjust the frequency of the release. Kenotron is used to combat electromagnetic interference.

Device connection

How to connect an independent release? If you consider ventilation systems, the connection of the device is carried out through dyntorators. In this case, the output contacts are connected through insulators. The negative resistance parameter itself is obliged to fluctuate in the region of 25 ohms. The relay connection is provided through the expander. When connected, check the threshold resistance. The specified parameter should not exceed 30 ohms. Fixing the release is carried out in the power shield. To check the voltage you need to use the tester.

Models at 20 a

Flap 20 and are often used for phase switches. The threshold voltage parameter of the models is located in the area. Some modifications are made with stabilizers. It is also important to note that the market contains releases with the SP20 protection system. The transistors are used in broadband type. All this suggests that they can withstand large overloads in the chain.

Connecting to the shield of many models occurs through the kenotrons. They are produced most often than two-contact type. The conductivity of the current in many models does not exceed 5 MK. It is also important to note that the models for ventilation systems are manufactured with condenser modulators. In some cases, they are mounted with expansion. For remote control switches, they fit perfectly.

24 a devices

24 A devices consist of diode rectifiers. They are installed in various conductivity. As a rule, the protection system is used by the IP21 series. However, in this case, much depends on the manufacturer. Modulators apply only orthogonal type. For pulse switches, models are suitable based on semiconductor thyristors.

Stabilizers in devices are used low sensitivity. The output voltage of this type of release does not exceed 20 V. The average current performance indicator is 3 MK. Insulators are used to attach the device to the shield. If we consider modifications without transceivers, then they use a condenser unit. Many modifications are suitable for low-voltage switches.

Modifications by 30 a

Footage by 30 A are produced with code expansion. The output voltage indicator in the models is 35 V. As a rule, rectifiers are used by a diode type. In this case, the contacts are installed on movable plates. Transceivers are used with many models connected to shields through condenser blocks. In order to avoid large chain overloads, expansion dynins are used.

Some releasers are manufactured on the basis of a two-pole transceiver. Their distinctive feature is high current conductivity. This parameter varies in the area of \u200b\u200b6 MK. However, the disadvantage of such systems is rapid wear of capacitors. It is also important to note that the models are not suitable for pulse switches.

Z-ASA / 230 model

Disable ventilation in a fire through an independent Z-ASA / 230 release occurs very quickly. The specified model is made with movable plates. There are six pairs of contacts here. For pulse switches, this device is suitable perfect. It is also important to note that the model is capable of being operated in conditions of high humidity. Directly open contacts are carried out very quickly. For remote control of the ventilation system, the specified installation is well suited. The conductivity of the current release is equal to 4.5 MK.

In this case, the output voltage on the relay is equal to 30 V. The stabilizer in the device is installed without an adapter. Transistors are used double-type. The kenotron at the model is not provided. Connecting an independent release to the shield is carried out through a dynisterist. It is installed with one panel, which is located at the bottom of the case. Before connecting the device, the negative resistance for each phase is first checked. It is also important to note that the wiring is important thoroughly isolate.

Z-ASA / 250 model

Why do you need a release independent Z-ASA / 250? This model is used exclusively for phase switches. The conductivity of the current is equal to 4.5 MK. The threshold overload of the device is no more than 24 A. The output voltage on the relay does not exceed 33 V. The rectifier is set by a diode type. In total, there are five pairs of contacts. The modulator has an orthogonal type. To connect the model, a condenser unit is used, which is included in the standard set of modification.

If we talk about structural features, it is important to note that the transceiver is applied single-pole type. The protection system of the manufacturer is provided with the marking of the IP30. The minimum permissible temperature of the release is not more than -15 gr. The stabilizer in this configuration is not provided.

Model IEK pH47.

This independent release (photo is shown below) is quite strong. First of all, it is important to mention its compactness. To connect to the shield, a small condenser unit is applied. In total, the model uses two rectifiers. Contacts in this case are provided by moving type. The extender is directly located at the bottom of the design along with the relay. Transceiver in this case is missing.

If we talk about the settings of the release, it is important to note that the output voltage is maintained at 40 V. The threshold overload of the model is equal to 30 A. The minimum permissible temperature of the release does not exceed the rate of B -10 degrees. Increased humidity model is not afraid. The protection system is standardly applied with the IP30 marking. Wiring in this case is used with insulators for safe operation.

Model IEK pH48.

This independent release (the connection scheme is shown below) is performed with two diode type rectifiers. The relay in the device is used high-voltage. The current conductivity parameter is at 4 MK. There are two resistors in the device. Contacts are installed on special plates. Directly opening is carried out pretty quickly. It is also important to note that the device is allowed to connect through the condenser unit. The output relay is located in the lower part of the design.

The modulator applies orthogonal type. For phase switches, the model is suitable. If we talk about the parameters, it is important to note that the threshold overload is at 24 V. The output voltage on the relay maximum reaches 30 V. The minimum permissible modification temperature is -15 degrees. The system of protection in the release is applied with the marking of the PP30.

Model IEK pH50

This independent release is performed for pulse and phase switches. For ventilation systems and drives, it fits well. The current performance indicator is about 3 MK. The parameter of the negative resistance on the relay maximum reaches 46 ohms. Transceivers in the release are used bipolar type. In total, the model has three pairs of contacts.

They are attached on special plates that are above the relay. Modulator Manufacturer provides an orthogonal type. Through the condenser unit, the model is prohibited. For this, only Kenotron is suitable. The minimum permissible temperature of the release is -10 degrees. Output voltage on the relay maximum reaches 40 V.

SHUNT 230 VAC model

This independent release can be used only for a pair with a phase switch. For remote control of the drive, the model is suitable. The extender here applies code type. Also, of features should be noted the presence of trimming resistors. Directly the transmission of the signal is carried out through a diode rectifier. The modulator is used in the orthogonal type chains. The threshold overload of the system does not exceed 30 A. The minimum permissible temperature of the release is on -20 degrees.

SHUNT 250 VAC model

This independent release (the connection scheme is shown below) is made on the basis of a diode rectifier. It is located above the relay. If we talk about the device parameters, the negative resistance of the system is 44 ohms. In this case, the threshold overload is equal to no more than 24 A. To connect a modification there is a compact condenser unit. Conductors in this case are used with insulators. In total, the model has three pairs of resistors. They are located above the rectifier. The stabilizer in this case does not provide for the manufacturer. For low-power drives, this model fits perfectly.

Model S2c-A

This independent release can be used only with pulse switches. The rectifier in the device is set by a diode type. The relay is used with the expander. The conductivity indicator is not more than 4.5 MK. Transceivers are installed above the relay.

The stabilizer in the presented release is not installed. The models are located on the plates. Signal transmission is carried out due to an orthogonal type modulator. Connecting the release is made through the kenotron. Condensatory blocks are not suitable for this purpose. The minimum permissible temperature of the release is on -10 degrees.

An independent release is an addition to the protective device for the power grid. It is mechanically connected to the circuit breaker. An independent release performs the function of the chain break when factors are detected capable of damageing the line and appliances included in it. These include increasing the strength of the current above the limit, which can withstand the cable, the test of the electric current to the ground or the case of the instrument turned on into the chain, as well as a short circuit. This material will help you to figure out what kind of circuit breakers, which are the types of this device and what is the principle of action of each of them. In addition, we will tell how to check the performance of these elements.

Automatic protective switch with independent release

An independent release, as mentioned, is an extension element of the chain protection device. It allows you to disable av at a distance when the voltage is received onto its coil. To return it to the original state, you should click on the device with the "Return" inscription.

Quick Switches of this type can be used in single-phase and three-phase networks.

An independent release is most often used in electrical caps and automatic shields of large objects. The power supply management in these cases is usually made from the operator console.

An example of a trigger of an independent release on video:

What is it triggered by an independent element?

An independent release can work for various reasons. We will list the most common of them:

Excessive decline or, on the contrary, increasing the voltage.
Change the specified parameters or power states.
Violation of the function of circuit breakers, a failure in work for an unknown reason.

In addition to independent excavating devices, there are similar elements that are part of protective automata. Built-in circuitors of circuit breakers are divided into thermal and electromagnetic. These devices also help protect the line from excessive loads and short circuit. Consider them in more detail.

Heat release of automatic protective switch

The main element of this device is a bimetallic plate. With its manufacture, two metal with various thermal expansion coefficients are used.

Being compressed together, they expand into varying degrees when heated, which leads to the removal of the plate. If the current is not normalized for a long time, then by reaching a certain temperature of the plate concerns contacts AB, interrupting the chain and de-energizing wiring.

The main cause of excessive heating of the bimetallic plate, due to which the thermal release is triggered, is too high load on a specific line of line, protected by a machine.

For example, the section of the output cable AV, which goes into the room is 1 square meters. mm. It can be calculated that it is able to withstand the connection of the instruments with a total capacity of up to 3.5 kW, while the force passing in the current line should not exceed 16a. Thus, you can safely connect the TV and several lighting devices in this group.

If the owner of the house decides to include in the outlet of this room further washing machine, electrocamine and vacuum cleaner, then the total capacity will be much higher than the one that is able to withstand the cable. As a result, the strength of the current passing through the line will increase, and the conductor will heat up.

Cable overheating can lead to the fact that the insulating layer melts and lights up.

So that this does not happen, the thermal release is entering. Its bimetallic plate is heated together with the metal metal, and after a while, bent, turns off the power of the group. When it cools it, the protective device can be turned on manually again, pre-pulling the power cords from the outlet, which led to overload. If this is not done, after a while the machine will cut off again.

An example of using a reclining in the Fire Protection on video:

It is important that the nominal AV corresponded to the cable cross section. If it is less than the necessary, the trigger will occur even at normal load, and if more, then the thermal release does not respond to dangerous excess current, and as a result, the wiring is burning.

In order to protect electric motors from long overload and phase breakdowns, thermal discharge relays may also be installed on these aggregates. They are several bimetallic plates, each of which is responsible for a separate phase of the power unit.

Automatic network protection switch with electromagnetic release

Having understood how the machine gun works with a thermal release, we turn to the next question. The protective device, the analysis of which we have just conducted just that it does not work immediately (it takes at least a second), so it is not able to effectively protect the chain from the superhowers of short circuit. To solve this task in AB, an electromagnetic release is additionally installed.

The releasers of electromagnetic type circuit breakers include inductor inductor (solenoid), as well as a core. When the chain operates in normal mode, the electron flow, passing through the solenoid, forms a weak magnetic field, unable to influence the network function. If a short circuit occurs, an instant increase in the current strength is tens of times, and in proportion to it increases the power of the magnetic field. Under its influence, the ferromagnetic core is instantly shifted to the side, having an impact on the shutdown mechanism.

Since the process of gaining a magnetic field with a short circuit occurs for a split second, the electromagnetic release under its effect is triggered instantly, turning off the power of the network. This avoids the serious consequences associated with CZ overflows.

Checking the performance of releasers

Quite often, fans electricians are interested, whether it is possible to independently check the health of circuit breakers. It should be said that it is impossible to conduct such tests on their own, and if they are engaged in a beginner assembly, the work should control the experienced specialist. We give step-by-step instructions for the implementation of this procedure:

First of all, the box surface should be visually visual to make sure the integrity of the case part.
Then you need to click on the trigger lever several times. It should be easily installed in the included and turned off.
After that, the device is loaded. So called the quality of the quality of the equipment in adverse conditions. This stage provides for the presence of specialized equipment, and if it is fulfilled, a qualified electrician must be present. During testing, a time is recorded that runs from the moment of increasing the current increases before turning off the release.

Finally, a similar test is performed on the device from which the housing is removed.
During the inspection on the operation of the heat release, the time is recorded to shut down the device under the influence of electrotock of increased strength.

Checking the health of protective devices in accordance with the requirements of PUE is performed only in overalls. As mentioned above, an experienced specialist should be controlled by this procedure.

On the video process of installing an independent release in the circuit breaker:

Conclusion

In this article, we dealt with the theme of the excavating devices, they described what they represent and how to work independent, as well as built into the circuit breakers. Now you know what principle the various types of this equipment work, and which function is performed by each of them.

In each electrical circuit, various protective devices are installed. Quite often, in addition to them, an independent release is used associated with the automatic switch mechanically. In the event of conditions that threaten damage to the instruments and the line itself, it breaks the electrical chain in a timely manner. This is usually happening with a short closure, breakdowns and leaks, as well as the growth of current strength above the nominal limits dangerous for cables and wires.

General device of the release and connection scheme

Each independent release is a device with which the remote disable of protective equipment is performed. As a rule, it is used in conjunction with various automatic switches - with one, two, three or four poles. Usually, the release is connected to an introductory machine and when an emergency occurs, a complete de-energization of the shield is made.

The design of the release is made in the form of an electromagnet. When a short-term pulse arrives at it, the device has a special lever effect on the mechanism that turns off the automatic protective device. Electromagnetic coils used in the design can be different, calculated on an alternating or permanent current with a voltage of 12-60 V and 110-415 V, in accordance with one or another modification. Mounting to the machine also depends on the specific model and is performed on the right or left side.

A clear response of the entire system depends on the proportion of the proportionate device.

The normal operation of both devices largely depends on compliance with all the requirements of the connection scheme. For example, phase conductors must be connected from the lower phase terminals of the machine. If this condition is not compared to this, the probability of failure, incorrectly connected release, is high. Normally, the circuit breaker with an independent release must be disconnected, and the voltage from the coil of the device disappear.

Remote response control is carried out by means of a closing contact of one of the fire alarm devices or by pressing the usual button with closing contacts. By a similar scheme, it is shutdown at once several excavating devices distributed by separate groups.

Independent release for circuit breakers

As already noted, this device is an additional protective element of the electrical circuit. With it, a remote shutdown of machine guns or load switches is carried out.

The highest distribution of an independent release was obtained in the preparation of projects of ventilation systems. In accordance with the regulatory documents, in the event of a fire, ventilation must be completely disabled. Therefore, to an introductory machine installed in the shield serving the ventilation system, an independent release is additionally connected.

In electrical shields, designed for current up to 100 amps, modular machines are installed. The total entry in most cases is protected by the load switch. It is to it that an independent discharge device is connected, which performs a shutdown with emergency situations. If the current at the input is over 100 A, the installation of a more powerful circuit breaker is required. You can choose the most suitable independent release.

With this device, it is possible to disable not only single-phase, but also three-phase instruments. In order for the release begins to act, it is quite enough to submit a voltage pulse to its coil. Returning the release to the original state is carried out using the "Return" button. Her pressing manually indicates a remote shutdown, and not a trigger as a result of a short circuit.

The triggering of independent releases may occur for various reasons. The following are the most common:

Excessive voltage jumps in the direction of increasing or decreasing.
Violation of the established parameters, change the state of the electric current.
A malfunction failure, the impossibility of their functions.

There are similar disconnecting devices used in conjunction with automatic switches. They perform the same functions, but on the principle of operation are thermal and electromagnetic.

Thermal sealing machines

Bimetallic plate serves the main element of thermal delaying devices. It is made of two metals, each of which has its own thermal expansion coefficient.

Both metal are pronounced among themselves and during heating they have different degrees of expansion, which in turn causes deformation and curvature of the plate. If the current situation does not return to normal throughout a certain period of time, the plate under the action of the increased temperature will touch the contacts of the automaton, turning off the electrical circuit.

Thus, the operation of the thermal release is caused by an increase in the temperature of the plate under the action of an excessive load on any site under the protection of the machine. That is, to a wire or cable with a certain cross section, you can connect a strictly limited number of devices and equipment. When trying to turn on another device, the total power of the instruments will exceed its allowable value for this cable. The current will begin to grow and cause heating the conductor. Strong overheating often leads to the melting of the insulating layer and fire.

This situation is prevented by the work of the thermal release. The heating of the bimetallic plate occurs with the wire, and after a while its bend, affecting the machine, turns off the current supply. After cooling, the protective device is turned on manually with the pre-shutdown of instruments that caused overload. Without this procedure, the machine will turn off again after a while.

The use of a thermal release requires accurate correspondence to the cross section of this cable. Failure to comply with this condition will lead to triggers even at normal loads. And, on the contrary, with dangerous exceeding the current, the release does not react and the wiring fails.

Machines with electromagnetic releases

The disconnected devices in which an independent release and a thermal release is complemented by an electromagnetic device with similar functions.

The need to use them is dictated by the specifics of thermal releases, which cannot work instantly and perform shutdown only for one second and more. In this regard, they cannot provide effective protection against short circuits. Therefore, in addition to the thermal, another discharge device is installed - electromagnetic.

The design of electromagnetic devices consists of inductance coil - solenoid and core. In the usual operating mode, the electrons circuit through the solenoid and form a weak magnetic field that does not affect the overall network performance. When a short circuit occurs, the current is instantly increases many times. At the same time, the proportional increase in the power of the magnetic field is observed. Under its exposure, an instantaneous shift of the core affecting the disabling mechanism occurs. Thereby preventing serious consequences from the action of superhtow short circuits.

How to check the health and performance of the release

This check should be performed only by qualified specialists. Actions are performed in the following order:

Visual inspection of the surface of the case for chipping, cracks and other defects.
Make a few click switch. The lever must easily become in all positions.
At the next step, you need to perform the so-called device loading by creating adverse conditions. This requires special equipment and the presence of qualified electrical engineering. The main indicator of testing is the time interval from the moment of increasing the current and until the device is completely turned off. Exactly the same procedure is performed on the device with a damned case.
During the inspection of the thermal release, it is necessary to set the time required to turn off the device under the influence of increased current.

Switching switch (automatic) is an electrical device that turns off the network if large electrotes occurs in it. Such a device is used to overheat the wires it does not happen to fire in the house, and expensive household appliances did not fail.

Varieties of switches

All automata are divided by the type of release. They are divided into 6 species:

thermal;
electronic;
electromagnetic;
independent;
combined;
semiconductor.

They very quickly recognize emergency situations, such as:

the emergence of overflows is an increase in current force in the power supply in excess of the rated current of the switch;
voltage overload - short circuit in the chain;
voltage drops.

At these moments in automatic releases, contacts are spacing, which prevents serious consequences in the form of a damage of wiring, electrical equipment, which very often leads to fires.

Teplova switch

It consists of a bimetallic plate, one of the ends of which is located next to the automatic release device. The plate is heated by a current passing through it, hence the name. When the strength of the current begins to increase, it bends and concerns the plank of the trigger mechanism, which opens contacts in the "Automat".

The operation of the mechanism occurs even with minor nominal current excess and enlarged response time. If the load increase is short-term, the switch does not work, so it is convenient to install it in networks with frequent, but short overloads.

The advantages of a thermal release:

the lack of surfaces in contact and rubbed;
stability in vibrations;
budget price;
simple design.

The disadvantages include the fact that its work largely depends on the temperature regime. Such automata is better to post away from heat sources, otherwise numerous false responses are threatened.

Electronic switch

In the details, its components include:

measuring devices (current sensors);
control block;
electromagnetic coil (transformer).

At each pole of the electronic automatic release, there is a transformer that measures the current passing through it. The electronic module that controls the discharge processs this information by comparing the result obtained with the specified one. In the case when the resulting indicator is more programmed, the smell of "automat" will occur.

There are three triggering zones:

Long delay. Here the electronic release serves as a thermal, blocking chains from overloads.
Short delay. Protecting non-essential short circuits that usually occur at the end of the protected chain.
The work zone "Instantly" provides protection against high intensity short.

Pros - a large selection of settings, maximum accuracy of the device given plan, the presence of indicators. Cons - sensitivity to the electromagnetic field, high price.

Electromagnetic

This is a solenoid (coil with wired wire), inside which is located a core with a spring, which affects the translating mechanism. This is an instant device. During the flow on the overthrow winding, a magnetic field is formed. It moves the core and, exceeding the spring force, acts on the mechanism, turning off the "automatic".

Pros - resistance to vibration and shocks, simple design. Cons - forms a magnetic field, instantly triggered.

This is an extension device to automatic releases. With it, you can turn off both single-phase and three-phase automaton, which is at a certain distance. To activate an independent release, it is necessary to supply the coil voltage. To return the automaton to its original position, you need to manually click on the "Return" button.

Important! The phase conductor must be connected from one phase from under the bottom terminal switch. If you connect it wrong, the independent switch fails.

Mainly independent machines are used in automation shields in strongly branched power supply devices of many large objects, where control is derived to the operator's console.

Combined switch

It has both thermal and electromagnetic elements and protects the generator from overloads and KZ. For the operation of the combined automatic release, the thermal "automaton" is selected and select the electromagnet is designed for 7 - 10 multiple current, which corresponds to the operation of thermal networks.

Electromagnetic elements in the combined switch are used for instantaneous protection against short circuits, and thermal protects against overloads with time delay. A combined automatic is turned off when any of the elements is triggered. With short-term overflows, none of the types of protection is triggered.

Semiconductor switch

It consists of alternating current transformers, magnetic amplifiers for DC, a control unit and an electromagnet that performs the functions of an independent automatic release. Install the selected program for disagging the contacts helps the control unit.

To its settings can be attributed:

adjusting the rated current in the device;
setting time;
triggering at the moment of short circuit;
protective switches from overflow and single-phase KZ.

Pros is a large selection of regulation for different power supply schemes, ensuring selectivity to consistently connected machines with a smaller amount of ampere.

Cons - high cost, fragile control components.

Installation

Many home-grown electricians believe that the installation of the automaton is not difficult. This is true, but you need to fulfill certain rules. Footage of the circuit breaker, as well as cork fuses, it is necessary to connect to the network so that with the automatic tube twisted, its screw sleeve was without voltage. The connection of the feed conductor with one-sided power supply with the machine must be made to fixed contacts.

Installation of an electric single-phase bipolar automaton in the apartment consists of several stages:

fastening the device turned off in electrical protection;
connecting wires without voltage to the meter;
connecting to the automata on top of the voltage wires;
turning on the machine.

Fastening

In the stack of mounted Dean Rake. Cut the desired size and secure it with screws to the electrical tailor. Select the automatic network release on a din-rail using a special lock, which is located on the back of the machine. Make sure that the device stood in the off mode.

Connecting to the electric meter

We take a piece of wire, the length of which corresponds to the distance from the meter to the machine. One end is attached to the electric meter, the other to the terminals of the release, observing the polarity. The supply phase is connected to the first contact, and the zero feeding wire on the third one. Wire cross section - 2.5 mm.

Connecting voltage wires

From the central distribution switchboard, the feed wires are suitable for the apartment shield. They connect them to the terminals of the machine, which must be in the "Off" position, observing the polarity. The wire section is calculated depending on the energy consumed.

Turning on the machine

Only after all wires are installed correctly, an automatic current release can be entered.

It happens that the constant shutdown of the machine becomes a big problem. Do not try to solve it by installing a release with a large nominal current. Such devices are put on taking into account the cross-section of the wires in the house, and maybe there are unacceptable high current in the network. It is possible to solve the problem only by examining the electrical supplies system by professional electricians.

In each device operating as a protective mechanism for electrical networks at home, there is an independent release for the circuit breaker. Such a device implies a mechanical connection with the switch and is considered to be built into the machine.

The task of this device in the automatic device is to dispense the electrical network in the case of an approaching negative factor, such as a short circuit or current leakage from the device itself or household aggregates.

Attention! Use the equipment strictly in the specified temperature modes. Deviation from the norm is not recommended.

In fact, scientists have registered a greater mass of cases, why the independent release was triggered, but the most common and most often encountered in front of you:

reduction of voltage in the electrical circuit;
raising voltage, change of current state;
change specified characteristics;
incomprehensible failure and dysfunction of machine guns.

Independent release

In view of so many reasons, modern devices are usually equipped with several mechanisms that make it positively dispose of the network. Their manufacture is produced mainly from electromagnetic and mechanical, sometimes electronic particles. The release of the circuit breaker will allow you to leave all existing techniques in the household in integrity. It is customary to share these built-in devices into two types.

Types of built-in releases

The first variety is household. Their mechanism is triggered exclusively from voltage, which runs along the main circuit of the circuit breaker. Such adaptations are capable of working remotely unlike other protective systems for electrical networks. The release actively helps to disconnect all the devices and sources from the network, which regularly consume power supply, in the case of a noticeable voltage deviation from the specified norm. However, this installation has a disadvantage that transfers the loss of energy into thermal selection and conducts it through an insulating conductor. Sometimes such a factor leads to an incorrect disconnection of the switch.

In the piggy bank electrician! Follow the characteristics of the mechanism, in some cases deviations may be observed from the norm.

Appearance of the release

In the latest samples and systems, it is necessary to eliminate this shortage due to the presence of a bimetallic plate, which were not previously used in the formation of an automatic protective device. This contributes to the obstacle to the overheating of the machine.

Methods for checking the actions of fixtures of circuit breakers

Often there are disputes that require clarification, how to carry out the calibration of the release of releasers, especially those who are interested in amateurs installers, that is, people who are coping with their own for the installation of automatic equipment.

To start, spend visual control, that is, inspect the entire box. It is important that the body is integer with the absence of deformation;
Try the switch key, make sure that it takes the form in the on, also in the opposite value;
It is required to load, in other words, checking the automatic device for the extension of the network under adverse conditions. This experiment is carried out on specialized equipment under the guidance of experienced electricians. Using certain abilities, the release time of the release from the moment of increasing voltage is recorded.
Free the release from the walls of the corps and follow it under the influence of equipment. When the current leakage occurred, the plate should warm up and deform, and this is a signal of disabling the automaton lever.

Attention! Checking the circuit breakers to trigger should be carried out strictly in overalls and under the control of an experienced specialist.

When checking the thermal response, the time is recorded for which the machine will switch to the disconnected state under the influence of the voltage.

Entroducing coil

What is the releaser? First of all, its tasks are considered to ensure the implementation of protection against the electrical network from the voltage, which may even in the minimum indicator, but exceed the value of the rated current specified in the device passport. Do not forget to pay attention to the ability of the device, it denotes at what stage the supply of electricity in the chain should be ceased.