Schematic diagram of the voltage stabilizer Resanta ASN 5000. We repair Resanta voltage stabilizers with our own hands

Resanta companies, which is understandable. This is due to the fact that such units allow you to normalize the operation of all electrical appliances that are present at home. In other words, they allow you to save quite expensive equipment in the event of an overload in the network or during power surges, thereby significantly extending the service life of all electrical equipment.

However, the operation of a voltage stabilizer is also associated with the risk of certain breakdowns, the only way out of which is timely repair

There may be several reasons for this - from improper operation to natural causes of breakdown, i.e. long service life.

To avoid this, you must strictly follow the instructions included in the kit, which will significantly extend the service life of the unit in the correct operating mode. If a breakdown does occur, then you need to know what methods you need to properly carry out repairs yourself, so as not to further aggravate the situation. In this article we will look at the main faults, as well as ways to eliminate them in a timely manner.

This video shows a malfunction

The structural structure of the Resanta voltage stabilizer is as follows:

automatic type transformer;
the electronic unit;
voltmeter;
a control element that is responsible for starting and turning off certain windings.

This manufacturer produces many different types of stabilizers.

, therefore these winding connection organs will differ. We will talk about all these nuances a little later, while considering the repair procedure.

In this design, the decisive factor is the electronic unit, which exercises general control of the entire system of the unit. He is responsible for the operation of the voltmeter, and also receives information about the power of the input voltage. Then, the block compares the obtained values with the optimal ones, determining the next action, i.e. whether it is necessary to add a few volts or, on the contrary, to subtract a certain amount.

Next, along the chain, is the determination of the necessary windings - which ones need to be started and which ones need to be turned off. Then, the electronic unit carries out one of these actions, after which all electrical appliances in the apartment receive a stable current.

Of course, the stabilization process itself may be slightly different, depending on the type of device being manufactured.

This difference applies to the types of windings, as well as the methods of starting and stopping them. Today, the Resanta company produces two types of these stabilizers:

Electromechanical type.
Relay.

Accordingly, their repair will be somewhat different.

Features of the electromechanical stabilizer

Let's start our consideration with electromechanical type stabilizers.
Its design contains a servo drive, which starts and turns off the windings in the device. The servo drive itself consists of a motor on which an electrical contact (brush) is located. When the armature of this motor moves, this brush also rotates, constantly contacting the copper windings. The width of this brush allows for complete coverage of the entire winding, which allows the phase not to disappear.

In order for the brush to move in a given direction with the desired characteristics, an error voltage occurs in the device. Then, this voltage value increases. It is then transmitted to the engine, which causes the armature to rotate in the optimal direction. Accordingly, the brush also moves, like the anchor, in the same specified direction. In this case, direct contact is made with the windings.

The error voltage value will be proportional to the value generated by the difference between the actual volt value at the input and the value that should be there. This signal can have one of two polarities, each of which specifies a specific direction of movement. Below is a diagram of such a voltage stabilizer:

Regardless of the specific model, the structure of this voltage stabilizer will be almost the same. They differ from each other in different power values and individual circuit elements.

Features of the relay stabilizer

All relay stabilizers equalize current values by jumps. This is explained by the fact that the relay starts or turns off the turns located on the second winding. An electromechanical stabilizer performs this process more smoothly than a relay one.

Relay units from Resant connect turns until they find the right one. All these turns are conventionally divided into subgroups, and from each turn there is a terminal, which receives current when the device starts up.

The diagram of all relay stabilizers of this brand shows that its design contains about four relay elements. In some cases, this number can be equal to five (SPN models).

In the case of relay stabilizers, it is the relay that is the most vulnerable point of the entire device. This is due to the fact that it is in constant operating mode, which significantly increases the risk of failure

Basic faults

Having examined the operating principles of both types of voltage stabilizers, we can conclude that it is their main components that are the most frequently broken components of the system. We are talking about a servo drive in electromechanical devices, as well as relays in relay devices.

In the first case, the constant movement of the servo drive leads to periodic friction of the turns of the coil and brush, which leads to excessive overheating of these components. This also causes severe wear and sparks from the copper wires.

It is also necessary to keep in mind the fact that the current value in the network periodically changes, which provokes a similar change in the movement of the servo drive. Such unstable operation can lead to failure of this device.

Repair of one of the faults is demonstrated in the video

Repair

Repair of the Resanta stabilizer can be divided according to the type of breakdown.

Servo

First, let's look at a situation where the Resant servo motor fails. There are two ways out of this problem

Buy a new motor, then install it in the device.
Try to repair the damaged one.

If everything is clear with the first case, then the second requires detailed consideration. It is important to understand that if the repair work is successful, the restored engine will not be able to work for a long time, i.e. this is a temporary measure.

All our actions

will come down to the following:

We disconnect the motor with the servo drive from the overall structure. Then we connect it to a power source with sufficient power.
It is necessary to supply a current of 5 V to the motor outputs. The current must be at least 90 mA.
Carrying out these manipulations will normalize the operation of the stabilizer. Next you need to connect the motor back to the circuit.

The circuit is quite simple: the input cable is connected to the input terminal, the neutral cable is connected to the neutral terminal. The same manipulations are performed for the output cables. In addition, you need to remember to connect the ground wire.

Relay

Failure of a relay often leads to breakdown of transistors

. For example, in the ASN-5000 model, transistors of the D882P type are located. The diagram is shown below:

If these transistors fail, then you need to purchase new ones to replace them. You can purchase them quite freely, because many specialized stores sell Resanta brand equipment and components.

You can also try to make repairs

damaged parts:

First you need to remove the relay cover. Next, remove the moving contact, freeing it from the spring.
Using sandpaper, remove all carbon deposits from the contact. We carry out this manipulation for both contacts - upper and lower.
Then we lubricate the contacts with gasoline, after which we assemble the relay structure.

Other faults

Another possible problem is that the display turns on randomly, as well as the relay itself turns on. The reason for this may be the XTA1 resonator, which may have been soldered incorrectly.

The repair is as follows

Solder this resonator using a soldering iron.
Use sandpaper to clean the leads.
Solder the resonator back.

A specialist's story about the repair of Resant

Welcome to the blog of the system administrator and solder

From this thickness we subtract the insulation of 0.1 mm, and we are left with 1.1 mm.

So, as I already said in the previous article about three-phase stabilizers, a three-phase stabilizer is three single-phase ones.

Ultimately, every household electrical appliance works for a long time and very rarely requires repair. Electronic board What makes the autotransformer motor move? Datasheet documentation for transistors can be downloaded at the end of the article.

These capacitors are not of high quality. The servo drive itself consists of a motor on which an electrical contact brush is located.

Repair of electromechanical stabilizer ASN-10000/1-EM

Severe contamination of the contacting turns of the autotransformer Thus, the acceleration of contamination becomes avalanche-like, which leads to rapid wear of the autotransformer contacts and burnout of the contact brush, after which the stabilizer will stop producing voltage. The heart of the device is a step-up autotransformer.

Thus, there is a possibility of failure of the engine control output stage. Its design contains a servo drive, which starts and turns off the windings in the device. Why did his head suddenly blow off…….

I recommend articles on the topic:

Repair of Resanta stabilizers can be carried out both at home and in a specialized workshop. Try to repair the damaged one. In addition to these transistors, resistors R45 and R46, included in their collector circuit, burn out due to overheating. In electrical networks where there are frequent power surges, the electric motor may break down within a year of using the equipment. What is a control circuit, its difference from the emergency and thermal circuits, and why the repair of any serious automation must begin with checking the control circuit - it is described in detail, I highly recommend it if you have read this far. The second is the absence of a cooling fan, in this case the cooling is natural.

We carry out this manipulation for both contacts - upper and lower. It is necessary to supply a current of 5 V to the motor outputs. This occurs by opening the contacts of the KL relay, see Voltage stabilizer. Resanta, user review.

Conclusion

Repair work, in this case, can be carried out at home. At the same time, it is assumed that the person performing these manipulations will be well acquainted with such equipment, have the skills of proper soldering and some knowledge in electronics. If a person does not have this, then it would be more advisable to turn to specialists.

There are quite a few similar service centers in Moscow and St. Petersburg. In particular, “Demal-Service”, located at: Moscow, st. 1st Vladimirskaya, building 41.

In St. Petersburg there is a service center of the company itself, located at the address: st. Chernyakovsky, house 15.

In this article I will tell you about my experience in repairing the electromechanical voltage stabilizer Resanta asn-20000/3-em

, the appearance of which is shown on the left.

I have already described how a voltage stabilizer works in articles on stabilizers. Anyone interested in general questions about the selection, connection and types of these devices - please follow these links.

I think that if you set out to repair the stabilizer and came to this page, the principle of operation is well known to you.

ASN-8000H/1-C

The wall-mounted voltage stabilizer ASN-8000R/1-Ts has small dimensions: depth - 19 cm, height - 30.5 cm and width - 23 cm. The device is equipped with a bracket attached to the device body. The bracket has four holes for secure fastening with hooks or screws.

On the front wall there are:

digital screen - the Volt values at the input and output are displayed here;
indicators - confirm the presence of input voltage, signal the activation of the protection system or delay system;
auto mode switch - switches the device from the “Bypass” mode to the “mains” mode and back. It has a system for blocking the simultaneous activation of these modes.

Principle of operation

This stabilizer operates on the principle of voltage boost using a step autotransformer and thyristors. When the input voltage deviates, the controlling microprocessor sends a pulse to the electronic switch, which will insert the currently required winding of the autotransformer into the electrical circuit in such a way that the output voltage is maintained within the permissible range. The response time of the stabilizer is short (approximately 20 ms), which ensures the safety of devices connected to the network from the harmful effects of power surges.

Components of three-phase Resanta ASN

Before moving on to repairing the voltage stabilizer, let’s first take a brief look at what our box consists of and how it works.

So, as I already said in the previous article about three-phase stabilizers, a three-phase stabilizer is three single-phase ones. The same is the case with Resanta asn-20000/3-em:

Three-phase electromechanical stabilizer - device

It can be seen that this stabilizer consists of three identical parts - three single-phase stabilizers, each of which stabilizes only its own phase. This applies to such common single-phase models as ASN 10000 1 em, etc.

That is, even if there is a significant imbalance in the phase voltages at the input, the output for all phases will be 220 V + -3%. You can read more about the parameters of such stabilizers in the instructions, which can be downloaded at the end of the article.
And if the phase imbalance occurred as a result of a zero break, about the consequences of this. A three-phase stabilizer will correct the situation to a certain extent, and if it fails, it will turn off and save the consumer.

Autotransformer

The heart of an electromechanical transformer is a step-up autotransformer. This “heart” beats in time with the change in voltage at the input of the stabilizer, trying to equalize it to normal.

Step-up autotransformer - the heart of the electromechanical stabilizer

Why is a step-up autotransformer used rather than a step-down autotransformer? Because stabilizers most often have to deal with reduced input voltage. But this does not mean, of course, that it cannot reduce the overestimated input voltage. However, I will not describe the principles of operation of the autotransformer here.

Let's look at the stabilizer device in the following photo:

Stabilizer device with explanations

The first thing you need to understand is that an autotransformer consists of two equal parts connected in parallel to increase power. Accordingly, there are two windings, two brushes ride on them (the brush is not visible in the photo, it is indicated by an arrow).

Since the brush is a contact, and a rather poor one at that, it gets hot. This is normal, but a radiator is provided to cool it. A temperature sensor is installed in the brush radiator, which, when the permissible temperature is exceeded (105°C), opens the control circuit and disconnects the load from the stabilizer output.

The motor moves brushes along the surface of the winding, adjusting the voltage. At the end of the brush stroke, corresponding to the lowest voltage (140 V), limit switches are installed to stop the motor. This is the most difficult operating mode, since the output power of the stabilizer drops. If the voltage drops further, the autotransformer can no longer cope, and the entire stabilizer turns off. This occurs by opening the KL relay contacts (see circuit diagram below).

A temperature sensor is attached (glued) to the transformer body, which, when overheated above 125 °C, opens the control circuit, protecting it from further thermal destruction.

Both types of sensors are self-healing. That is, when it cools down, the control circuit is assembled, and the stabilizer is ready for use again.

Electronic board

What makes the autotransformer motor move? This is an electronic circuit that measures the input phase voltage and outputs voltage to a servo motor, which moves the autotransformer brush, changing the output voltage to the desired level:

The above photo shows the consequences of eliminating a common malfunction - breakdown of bipolar power transistors through which the engine is controlled. Along with them, resistors also burn out, which initially had a power of 2W, but were replaced by 5W. But for malfunctions and repairs - at the end of the article.

This starter is necessary to protect (turn off) the stabilizer and load in case of unavailability, malfunction or overheating.

Maybe this will be interesting too?

Let's take a closer look at its operation when analyzing the electrical circuit diagram.

Electrical diagram of a three-phase voltage stabilizer Resanta

Let's consider the circuit of a single-phase electromechanical stabilizer Resanta ASN - 10000/1-EM. Let's take this circuit, because, as I said, three single-phase ones are one three-phase stabilizer.

The diagram, as usual, can be zoomed in and then enlarged to 100% by clicking on the arrows in the lower right corner of the image. Then right-click, Save Image As... etc.
Be sure to check out how to print such a large diagram.

Electrical diagram of voltage stabilizer Resanta-ASN-10000-1-em

For ease of perception, I have marked the main structural parts on the diagram.

I will not fully consider the operation of electronics; if you are interested, ask questions in the comments.

Now - how does this circuit differ from the circuit of a three-phase stabilizer:

The main difference is in the control circuit. In the single-phase version (in the diagram) it can be seen that the control circuit for powering the KM starter is assembled as follows: Neutral – On-delay relay KL – Thermal relay 1 transformer (125°C) – Thermal relay 2 transformer (125°C) – Thermal relay 1 brush (105 °C) – Brush thermal relay 2 (105°C). Total – 5 contacts. If this circuit is assembled, the KM contactor turns on and voltage is supplied to the output of the stabilizer.

In the three-phase version, in order for the stabilizer to start, 15 (!) conditions must be met - this is exactly how many contacts must be closed in order for the KM contactor to turn on.

During normal operation, when the stabilizer is turned on, you can hear how the CC is assembled - after about 10 seconds there is a click (on one of the electronic boards), then another one, and the third click starts the contactor and the entire stabilizer.

What is a control circuit, its difference from emergency and thermal circuits, and why the repair of any serious automation must begin with checking the control circuit - it is described in detail, I highly recommend it if you have read this far)

The second is the absence of a cooling fan; in this case, the cooling is natural.

Third, there is no bypass; its implementation will require the use of a three-pole contactor with normally closed contacts (or two conventional contactors), this is expensive, so the manufacturer did without it.

I am also writing to the house about this problem via AVR.

Principle of operation

The constant movement of the servo drive is the main weakness of the electromechanical device.

Well, that's not the point.

At the end of the brush stroke, corresponding to the lowest voltage B, limit switches are installed to stop the motor. At the same time, chaotic switching of the relay was observed. The difference in price with Samsung's is a pittance, but because of one such part, TVs, washing machines and irons break.

The drive includes a low-power motor on which the contact brush is located. Electrical diagram of the Resanta-ASNem voltage stabilizer For ease of perception, I marked the main structural parts in the diagram. Accordingly, their repair will be somewhat different. If necessary, replace the transistors with new ones. We will mention them below, namely when we consider the features of the operation and repair of each type of normalizer from the Latvian manufacturer. Repair of electromechanical voltage stabilizers The most important problem with such stabilizers is overheating. Since the brush is a contact, and a rather poor one at that, it gets hot.

I am also writing to the house about this problem via AVR. An HA operational amplifier from Hitachi Semiconductor was also found on the board.

Both stabilizers differ in their operating principles and have their own strengths and weaknesses. You need to clean as you go with the brush, then rinse thoroughly with alcohol and wipe dry with a clean cloth. If the voltage drops further, the autotransformer can no longer cope, and the entire stabilizer turns off. Such unstable operation can lead to failure of this device.

Finally, clean all contacts with special gasoline and reassemble the relay in reverse order. During normal operation, when you turn on the stabilizer, you can hear how the CC is assembled - after about 10 seconds, a click on one of the electronic boards, then another, and the third click starts the contactor and the entire stabilizer. It is worth paying attention to the fact that the general structure of all normalizers of this type is similar. Voltage stabilizer for home and tokzamer.ru ASN-5000/1C

Repair of electromechanical voltage stabilizers

The main problem with such stabilizers is overheating. It is absolutely necessary to carry out maintenance of the stabilizer once every 1-2 months, depending on operating conditions. And the repair of voltage stabilizers must begin with cleaning.

The problem of overheating manifests itself primarily due to the fact that the graphite brush, when moving along the surface of the transformer, inevitably wears out, and its particles, along with dust and other debris, remain on the contact track.

Now, when the brush continuously “crawls” over the surface, it begins to heat up more, spark, the debris burns and burns to the copper surface. In the future, this negative effect will increase like an avalanche, and if measures are not taken, it will reach irreversible limits, when cleaning will no longer help.

Of course, thermal sensors will save the situation - these are the first “bells”. If the stabilizer suddenly starts to turn off on its own, you should urgently call a specialist and clean the surface.

Here is the surface of the transformer in satisfactory condition, after three years of operation 8 hours a day:

Surface – Satisfactory. And this is after washing with alcohol.

And here is what indifference to the state of the stabilizer can lead to. This is the same stabilizer, a different phase:

Surface condition – Very bad

Even if you clean off this deposit, the cross-sectional area of the wire will irreversibly decrease by 20-30%, which will increase the heating of the wire and brush, and lead to the pessimistic processes described above:

The surface of the autotransformer is close. The wire insulation is burnt out, an interturn short circuit is possible. The epoxy also fell off due to overheating.

Only “zero” sandpaper will help here. You need to clean as you go with the brush, then rinse thoroughly with alcohol and wipe dry with a clean cloth.

Servomotor repair

Another breakdown is a malfunction of the servomotor when it stops moving the brush. The engine must be removed, cleaned, blown, and lubricated. Since a DC motor with brushes is used, you can try to idle it in both directions from a DC source with a voltage of about 5 V.

This way, without disassembling it, you can clean its brushes a little, because the engine rotates (or rather, turns) only at an angle of up to 180 degrees.

Electronic board repair

The engine can also spin because there is no power coming to it. Power comes from bipolar transistors. A pair of complementary transistors TIP41C and TIP42C is used, since the power supply to the circuit is bipolar. Transistors must be replaced in pairs, even if one is intact. And only one manufacturer.

The datasheet (documentation) for transistors can be downloaded at the end of the article.

Also in the same circuit, 10 Ohm resistors burn out (this is a consequence of the breakdown of transistors). When replacing resistors, nothing prevents you from increasing their power to 3 or 5 W, increasing operational reliability.

Well, replacing relays, transistors, limit switches and other small things - depending on the situation.

Power section repair

The power part includes autotransformers (I have already said enough about them). And also - a contactor and an input circuit breaker, whose contacts and terminals are lit. It must be periodically stretched, cleaned, and, if necessary, replaced.

Before you start installation

Before installing a voltage stabilizer, you should make sure that it is capable of providing power to the entire house. The easiest way is to check the rating of the circuit breaker installed at the input of the power supply circuit. In accordance with the table below, you can determine the maximum power that the input machine limits.

The rated power of the stabilizer should be greater, and with a margin. When studying the passport for the purchased device, you will find that the value indicated for the device drops to 75% when the network voltage decreases to 150-170V, depending on the model.

If the power of the stabilizer is not enough to power all the equipment in the house, it will be correct to connect only part of the energy consumers to it. Stabilized power can be supplied only to the most important consumers, as described in the article “Stabilizer for a gas boiler with protection against 220V power surges, how to choose”, as well as “How to choose a stabilizer to protect a refrigerator from surges and surges in 220V voltage”.

In any case, you should carefully read the product passport. If the device was delivered to the installation site of the stabilizer in a private house or country house at subzero temperatures, it should be kept for 2-3 hours in a warm room to dry the condensate.

Modernization proposals

If the voltage fluctuates approximately in one narrow range, and the transformer track is burned out in this area (as in the last photo), I suggest changing the circuit so that the brush “travels” over another area. To do this, you need to resolder the wire from the lower end of the winding (N) several turns higher (see diagram). Of course, on both parts of the autotransformer. As a result, the brush will slide along another, relatively clean part of the path. The disadvantage of this solution is the narrowing of the adjustment range.

Another solution to this problem is to buy new transformers, which is not economically feasible - after three years of operation it is better to buy a new stabilizer.

Another improvement is to install 12 V coolers (fans) on each transformer, which would blow on the brushes. Ideally, 6 fans. They will literally blow away specks of dust. This will significantly extend the life of the stabilizer.

How do you repair such stabilizers? I look forward to constructive criticism and exchange of experience in the comments.

Download files

As promised - instructions for the stabilizer and documentation for the transistors. As usual, everything is downloaded freely and without restrictions.

Graphic display of the main operating modes of voltage stabilizers

In one of the previous articles, voltages were described and also brought to the network with your own hands. This material outlines the main problems with voltage stabilization devices and the possibility of repairing them yourself.

It must be remembered that a stabilizer of any type is a complex electrical or electromechanical device with many components inside, therefore, in order to repair it with your own hands, you must have a fairly deep knowledge of radio engineering. Repairing a voltage stabilizer also requires the availability of appropriate measuring equipment and tools.

Complex stabilizer device

Before you start installation

The degree of difficulty of repairing various types of stabilizers

All voltage stabilization devices have a protection system that checks the input and output parameters for compliance with the rated value and operating conditions. Each stabilizer has its own protective complex, but several general parameters

, going beyond which will not allow the stabilizer to work:

Rated input voltage (stabilization limits);
Output voltage matching;
Excess load current;
Temperature conditions of components;
Various signals from internal modules.

List of control parameters for the operation of stabilizers indicated in the technical specifications

It is necessary to check whether there is a short circuit in the load, input voltage, operating temperature conditions and study the meaning of error codes displayed on the displays

The most difficult thing to find is a breakdown in the stabilizer on triac switches, which are controlled by complex electronics. For repairs, you must have a diagram of the device, measuring instruments, including an oscilloscope. Using the given oscillograms, a fault is found at the control points in the structural module of the stabilizer, after which it is necessary to check each radio component in the defective unit.

Main components of a triac stabilizer

In relay stabilizers, the most common cause of failure is the relays that switch the transformer windings. Due to frequent switching, the relay contacts may burn out, jam, or the coil itself may burn out. If the output voltage disappears or an error message appears, all relays must be checked.

Relay stabilizer power switches

For a technician unfamiliar with radio electronics, it will be easiest to repair an electromechanical ( servo-drive)

) stabilizer - its operation and reaction to voltage changes can be seen with the naked eye immediately after removing the protective casing. Due to the relative simplicity of the design and high stabilization accuracy, these stabilizers are very common - the most popular brands are Luxeon, Rucelf, Resanta.

Stabilizer Resanta, power 5 kW

Stabilizer transformer overheating

If the stabilizer transformer begins to heat up without a noticeable load, then a short circuit called an interturn short circuit may have occurred between the turns. But, taking into account the specifics of the operation of these devices, in which the conclusions of the autotransformer or the taps of the secondary winding of the transformer are constantly switched to adjust the output voltage to the required value, we can conclude that the short circuit is somewhere in the switches.

Relay stabilizer switching unit

In relay stabilizers (SVEN, Luxeon, Resanta), one of the relays may jam, and several turns of the transformer will be short-circuited

. A similar situation can arise in thyristor (triac) stabilizers - one of the keys may fail and will short-circuit the output windings. The short circuit voltage between the turns, even with an adjustment step of 1-2V, will be quite enough to overheat the transformer.

Triac stabilizer switching unit

It is necessary to check the triac switches to eliminate this breakdown. A thyristor or triac is checked with a tester - between the control electrode and the cathode, the resistance during forward and reverse measurements should be the same, and between the anode and cathode it should tend to infinity. This check does not always guarantee reliability, so to guarantee it is necessary to assemble a small measuring circuit, as shown in the video:

In servo-driven stabilizers, the windings do not switch, but adjacent turns can also become shorted due to a mixture of soot, dust and graphite filings clogged in the space between the turns. Therefore, servo-drive stabilizers such as Resanta and others require periodic preventative cleaning of contaminated contact pads.

Repair and modification of servo stabilizers

Many users have noticed that the rate of wear and contamination of the contacts of servo stabilizers depends on the operating environment, in particular, dust and humidity. Therefore, the craftsmen came up with a way to modify Resant stabilizers by installing a fan from a computer processor (cooler) opposite the most frequently used sector of the autotransformer.

Miniature fan for modification of servo stabilizer

A constantly running fan prevents dust from settling on the contact pads, preventing contamination and wear by removing abrasive particles from the working area. In addition to cleaning the contact surfaces, a fan installed in the Resanta stabilizer will also contribute to better cooling of the autotransformer.

Repair of stabilizers with a servo drive, such as Resanta, should begin with an inspection of the working contact area of the autotransformer

Carefully inspect the most worn areas of the contact turns

If the Resanta stabilizer was stored in a humid environment after a long period of operation, then the exposed unprotected copper contact pads could oxidize, which prevents the contact slider from making contact. Dust accumulated during inactivity due to sparking can be flammable. Briefly about the prevention of electromechanical stabilizers and a video demonstration of the operation of the servo drive:

Stages of repair of a servo stabilizer

First, it is better to remove the contact slider from the servo shaft. After this, use fine sandpaper to clean the contact pads to a metallic shine. It is better to clean the autotransformer contacts using a regular eraser. Then you need to carefully remove the accumulated sawdust and abrasive particles using a brush.

The device of the contact unit of the servo-drive stabilizer

The next stage of repair of the servo stabilizer will be inspection, cleaning and possible replacement of the contact graphite brush. During operation, this brush heats up due to the currents flowing through it. But even more heating occurs due to poor contact between the brush and the contact plates of the autotransformer. Due to increased heating and sparks as the slider moves, the brush burns out even more, thereby contaminating the contact pads and the spaces between them.

Severe contamination of the contacting turns of the autotransformer

Thus, the acceleration of pollution becomes avalanche-like, which leads to rapid wear of the autotransformer contacts and burnout of the contact brush, after which the stabilizer will stop producing voltage. Depending on the protection system in servo-drive stabilization devices from or from other manufacturers, in the event of a break in the output voltage, automatic protective equipment should operate.

Contactor - power element of protective automation

prevention is so important

servo drive stabilizers. Often, Resanta repairs end with cleaning the contacts and replacing the contact brush. But sometimes in servo-drive stabilizers the servo drive itself fails. The cause of a servo drive failure may be gearbox wear, a burnt-out motor, or a lack of voltage. Having removed the engine together with the gearbox, it is necessary to check the mechanism by turning the shaft.

Repair of electronic boards of voltage stabilization devices

The electronic control board of any type of stabilizer contains many components, including microcircuits, which cannot be checked without special equipment. But it's worth a closer look

the board itself and check the components on it for traces of high temperature.

Complex electronic relay stabilizer board

Overheated resistors are the first to “catch your eye” and sometimes become charred to such a state that it is impossible to recognize their markings - you will have to study the stabilizer circuit. Overheating of resistors indicates a breakdown in other elements of the circuit - most often in power transistor switches. A careful examination of the transistors can reveal blackening from overheating, and even mechanical cracks.

A clear example of a capacitor swelling

On the board itself, traces of the influence of abnormal overcurrents may also be seen - some tracks may burn, and the contacts may become unsoldered, or short-circuit due to spreading molten solder, heated by high currents. In addition, traces of strong heating of parts may remain on the board - from changes in shade to charring of the PCB.

An example of a burnt out track on a board

A visual inspection of the defective module can tell the technician in which direction to carry out diagnostics. But, as a rule, repair of electronic stabilizer boards is not limited to replacing obviously damaged parts and requires additional testing of various components using special equipment. Therefore, if testing the power transistors and other elements does not reveal the cause of the breakdown, it is better to take the electronic board to a workshop.

Resanta voltage stabilizers are used in many homes to ensure stable operation and protect the “health” of electrical appliances. As a result, home appliances work for a long time and undergo almost no repairs.

It must be said that the voltage stabilizer itself also requires compliance with operating conditions and periodic maintenance. Otherwise, the device may fail and require repair. In addition, after serving for a sufficiently long time, the device may break down simply due to wear and tear of parts.

This article is devoted to the delicate points of the Resanta brand stabilizers. Let's look at how failed parts are repaired and the device is restored to full functionality.

Repairing Resanta voltage stabilizers is a simple matter if you have original spare parts

This article will cover the following questions:

The basic operating principle of Resanta stabilizers.
Features of the operation of an electromechanical device.
Its main faults.
Servo drive repair.
How do relay normalizers work?
Relay repair.
Carrying out diagnostics of a repaired stabilizer.
Other malfunctions of relay devices.

In many houses and apartments, voltage stabilizers are used that were made in the walls. Thanks to the use of these devices, owners ensure stable operation and protect the “health” of all their household electrical appliances.

Ultimately, every household electrical appliance works for a long time and very rarely requires repair.

We would like to note that the stabilizer is also a home appliance that requires proper care and compliance with the necessary operating conditions. Otherwise, the voltage stabilizer that was released may fail and will need to be repaired.

In addition, it may fail after many years of use. In other words, it also has the ability to break.

Looking at this ability, we decided to devote an article to the weak points of Resanta brand stabilizers and consider how damaged elements can be repaired, as well as restore the full functionality of this sought-after device.

But first, let’s talk about the general structure and operating principle of devices of this brand.

Principle of operation

Like all voltage stabilizers, the Resanta brand normalizers consist of:

automatic transformer.
electronic unit.
voltmeter.
element that connects/disconnects certain windings.

Considering that the manufacturer produces various types of stabilizers, the elements for connecting the windings are different. We will mention them below, namely when we consider the features of the operation and repair of each type of normalizer from the Latvian manufacturer.

The electronic unit of any stabilizer controls the entire operation of the device. It controls the operation of the voltmeter and receives data on the input voltage level. Then he compares this voltage with the normalized one and determines how many volts need to be added or subtracted.

After this, it is determined which stabilizer windings need to be connected or disconnected. When this information is known, the electronic unit connects/disconnects the necessary windings using a relay or servo drive and our electrical appliances receive a normalized current.

This principle of current stabilization is inherent in every voltage stabilizer from. However, the stabilization process differs in different models of the company. They are due to the fact that the transformer windings are connected/disconnected differently.

The company produces two types of stabilizers:

Electromechanical.
Relay.

And, of course, the repair of each of them has its own characteristics.

Features of operation of an electromechanical device

First we will look at the electromechanical normalizer. The design of this voltage stabilizer provides for the presence of such an element as a servo drive. Actually, thanks to it, the different windings of the automatic transformer are switched.

Switching of these windings is carried out smoothly and as a result, precise regulation of the output voltage is ensured.

How does this smooth adjustment occur? A servo consists of a motor and a brush (electrical contact) that is attached to the motor's armature. When this anchor rotates, the brush also moves. It is constantly in contact with the copper windings of the transformer.

In fact, she glides along them. It has a width that allows you to connect two windings at the same time. As a result, no phase is lost at the output.

In order for the brush to move in a certain direction and by a certain amount, an error voltage is created in the normalizer. Further, thanks to the operational amplifier and the transistor output stage (it is a power amplifier), this voltage is amplified.

After this, it is supplied to the engine and causes the armature to spin in a certain direction.

The brush, which is in contact with the windings, also moves in this direction. The error voltage is proportional to a value that is the difference between the number of volts at the input and the required number of volts.

The error signal can have one of two polarities and as a result, each polarity causes the motor axis to rotate in a certain direction. These are the features of the operation of the electromechanical normalizer.

Note that many people buy a 10-kilovolt-ampere electromechanical stabilizer. Therefore, possible malfunctions and breakdowns of this type of voltage stabilizer will be considered on this model. Below is its electrical diagram.

Rice. 1. Electrical circuit of the ASN-10000/1-EM stabilizer.

It is worth paying attention to the fact that the general structure of all normalizers of this type is similar. The differences lie in the individual elements of the models with different power levels.

Basic faults

From the principle of operation of the electromechanical stabilizer described above, it becomes clear that when the current in the electrical network changes, the motor armature rotates simultaneously and the graphite brush moves.

The constant movement of the servo drive is the main weakness of the electromechanical device. Why? Because as a result of friction of the brush against the coil turns, excessive heating occurs both of the brush and the turns under it.

In addition, friction causes wear on the brush and contamination of the copper wires. The last reason causes sparks to appear.

Considering the fact that in our power lines the current changes very often, the servo drive moves with the same frequency. Such frequent rotation causes failure of the engine itself.

A notable feature is that engine failure causes failure of other parts. Thus, there is a possibility of failure of the engine control output stage.

Experts assemble this cascade based on a pair of transistors Q2 TIP41C and Q1 TIP42C. When these transistors burn out, resistors R45 and R46 also burn out.

They are components of the collector circuit of the above transistors. R45 and R46 are characterized by a resistance of 10 ohms and a power of 2 watts.

When there are such malfunctions, it is necessary to check the linear stabilizer. Its Latvian specialists assemble it on the basis of a zener diode DM4 and a transistor Q3 TIP41C.

If all these components of the electrical circuit of an electromechanical type voltage stabilizer, manufactured by, are burned out, then in any case they need to be purchased and replaced.

Servo motor repair

When the engine itself burns out, there are two options:

Buying a new one and installing it.
An attempt to restore an old engine.

The second option makes it possible to revive the engine on your own, however, not for a long time. For resuscitation, you need to disconnect the engine from the general circuit. After this, it must be connected to a powerful power source.

Your task is to supply current to its outputs with a constant voltage of 5 volts. The current should be between 90 and 160 mA. When such a current is supplied, every small particle of “garbage” burns out on the motor brushes.

Helpful advice: since the motor is of a reversible type, the polarity must be changed when applying voltage. This procedure is carried out twice.

After such actions, the engine will be able to work again, and the stabilizer will perform its main function. Next, according to a simple diagram, you can carry out the procedure for connecting the voltage stabilizer released.

This circuit involves connecting the input phase and neutral cables to the input phase and neutral terminals, respectively. The connection of the output wires is similar. A grounding wire must also be connected.

How do relay stabilizers work?

As for relay stabilizers from the Latvian company, other malfunctions occur during their operation. Accordingly, their repair is a different procedure.

Before we consider the features of repairing the Resanta relay normalizer, let’s pay attention to the features of its operation. The relay device equalizes the current in steps.

This happens because one relay connects/disconnects a certain number of turns of the second winding. If we compare an electromechanical stabilizer, its brush gradually comes into contact with a large number of turns.

In other words, it gradually connects intermediate turns and stops at the desired turn. In relay devices from Resant, all the turns seem to be divided into groups and a terminal comes from each of them. Actually, current is supplied to this pin when the relay is turned on.

The electrical circuit of each relay voltage stabilizer provides for the presence of four relays, which means that the number of terminals of the second winding is also equal to four.

The exception is the SPN series models. The number of relays is equal to the number five.

Helpful tip: when a certain relay is turned on or off, the output voltage changes by 15-20 volts, that is, mini voltage surges occur. These mini-jumps are clearly visible under the lighting.

For most electrical appliances they are not terrible. However, complex electronic and measuring equipment require smoother current stabilization. This should be taken into account when using any relay stabilizer.

To summarize the above, we note that the entire process of current normalization is accompanied by constant operation of the relay. Actually this mechanical component is the weakest point. During operation, it can either burn or stick.

How to repair a relay?

In the event that the relay contacts fail, the transistor switches may also break. Depending on the model, these switches can be assembled on different transistors. So, in the SPN-9000 model, these switches are assembled based on 2SD882 transistors.

The transistor switches of the ASN-5000/1-Ts model (its diagram is given below) are based on D882P transistors. All these transistors are produced by NEC.

Rice. 2. Diagram of the ASN-5000/1-Ts stabilizer.

In cases where these transistors and relays fail, they are completely replaced. Such spare parts for the above-mentioned models of voltage stabilizers produced by can be found in many stores.

You can also try restoring worn relay contacts. This procedure begins by removing the relay cover. Then they begin to remove the moving contact. This contact must be released from the spring.

Next, take zero-grit sandpaper and clean this contact of all burnt particles. The same cleaning procedure must be done for the upper and lower contacts.

At the end, all contacts are treated with Galosh gasoline and the relay is assembled. When the relay is assembled, you should check the transistors 2SD882 or D882P, or others (this depends on the modification).

They are desoldered (you need to have a soldering iron) and the integrity of the junctions is checked. If the transitions are not complete, you need to take new transistors.

Carrying out diagnostics

After completing the repair work, it is necessary to diagnose the operation of the stabilization device. To do this, use a LATR to which a stabilizer is connected. Next, using LATR, they change the voltage and monitor the operation of the stabilization device. A light bulb is used as a load.

After checking, you can connect to the public network. If you do not know how to connect a relay voltage stabilizer made in the walls, then it is worth remembering that this procedure is the same as for an electromechanical normalizer. We have already written about it.

Other malfunctions of relay devices

JAKEC capacitor set

It is worth noting that relay failure may not be the only malfunction that occurs in a relay normalizer from a Latvian company. In some cases, a periodic defect was observed in the SPN-9000 stabilizer.

An external sign of this defect was the chaotic display of display segments that were turned on. At the same time, chaotic switching of the relay was observed.

The reason for this lies in the cold soldering of the XTA1 quartz resonator, which has an operating frequency of 8 megahertz. This soldering causes microcontroller U2 to malfunction.

To solve the problem, you need to unsolder this resonator, clean its terminals with fine-grade sandpaper, carry out a good soldering and put it back.

Experts also recommend checking the electrolytic capacitors that are located on the controller board. This must be done because the company uses capacitors from the manufacturer JAKEC. These capacitors are not of high quality. During their testing, capacitance and ESR are measured.

Quality at a competitive price - Resanta SPN 9000 stabilizer. Powerful and reliable Resanta ASN 12000 stabilizer. Video Resanta SPN 5500 - a powerful relay stabilizer. Video Resanta - reliable and trouble-free stabilizers

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Difficulty of repairing voltage stabilizers

All stabilization devices are equipped with protective functions, with the help of which technical indicators are monitored for compliance with the declared data and operating conditions. Each model has its own protective system, but there is a common understanding of exceeding the permissible limits, which does not allow the device to continue working.

First of all, you need:

checking for short circuits, input and output voltage, temperature conditions of components;
study the error code displayed on the display.

It is most difficult to determine the malfunction of the triac switches of the device, since their control is associated with knowledge of electronics. When making repairs, you cannot do without a circuit diagram, measuring instruments, including an oscilloscope. Using the control points of the recorded oscillograms, damage in the structural module of the device is determined. Then each radio component and assembly will be checked for defects.

Example of connecting a single-phase voltage stabilizer

Connecting a 220 volt stabilizer in the simplest case can be done according to one of the given diagrams, depending on the sequence in which the meter and the input circuit breaker are already connected. In any case, it is necessary to ensure that the stabilizer is grounded. The essence of connecting a stabilizer is that voltage from the network is supplied to the input of the stabilizer, and electricity consumers are connected to its output.

Installation options for voltage stabilizers

The connection diagrams show a version of the terminal block on the rear wall of the voltage stabilizer with five contacts. It happens that the grounding terminal is located separately: the grounding conductor needs to be connected to it. Sometimes there is only one terminal N (zero), then both neutral wires: both the input wire and the one for consumers are connected to it.

Before directly connecting the stabilizer, it is necessary to de-energize the electrical network in the room using an input circuit breaker. Then you should make sure that it is really missing using an indicator or multimeter. The power switch and bypass switch of the device must be turned off.