Quant inverter voltage stabilizator. Basic concepts

Stabilizator Quant need for stable power supply of electronic devices, computer equipment, as well as any equipment with the electronic power supply unit.
It was specifically designed for safe operation of the load.

  • Input Working Range: 90V – 350V.
  • Output Working Range: 230V± 0,5%.
  • Power Source Type: Inverter voltage stabilizer.
  • Cabinet Material: Metal.
  • Special Features: Multifunctional Digital Display, Automatic Low & High Cut Off, Initial Time Delay, Auto Start, In Build Change-Over / By-Pass.

“Do you need a double conversion regulator?” – Four questions to ask

These are the four questions that we recommend to our partners to ask their clients to find out if they would need to buy a double conversion regulator.

  1. Does the voltage in your country meet the stated supply standards?
  2. If there is a deviation from the parameters does it lead to the breakdown of household appliances in your area of operation?
  3. Are double conversion regulators in demand?
  4. What can RPF QUANT-INGINEERING LLC as a manufacturer and your partner do to help you in selling QUANT double conversion regulators in your country?
Стабилизаторы напряжения Quant / Стабілізатори напруги Quant

Quant voltage regulator: return of energy to the grid

Quant voltage regulators have the ability to return energy to the grid, which was not available before even in conventional double conversion regulators.

The return of energy to the grid is used when the consumer has solar cells to generate their own energy and sells its excess (green tariff). Again, due to the poor quality of the grid, sometimes solar inverters refuse to feed power (insufficient or excessive voltage in the grid), which causes voltage spikes in the grid due to the constant shutdowns/switching-on of the inverters.

Operation through QUANT gives the inverter the ability to always feed power into the grid with an accuracy of 220V, ie with the optimal mains voltage for the inverter. With this approach, the risk of damage to the inverter itself is sharply reduced, and it is usually much more expensive than a voltage regulator. The regulator will also protect the inverter because it considers the inverter as a consumer.

Стабилизаторы напряжения Quant / Стабілізатори напруги Quant

Quant voltage regulator: parallel operation / power / failure-free operation / hot-swap

Quant inverter voltage regulators are able to operate in parallel. In a parallel connection, their power is added, the load consumption is divided equally into all parallel regulators without losses, you only need to buy (or get as a bonus with a large volume of purchases) a special device. The maximum power for one Quant regulator is 18 kW, ie 8 regulators on one phase will give a maximum power of 144 kW per phase, or 0.4 mW (megawatt) in a three-phase grid by three groups of 8 regulators. This case is quite rare, so it is advantageous to put the regulators at the place of consumption я (fortunately, they are light and small, so it’s more convenient to do it), then the quality of stabilization for a particular consumer will not deteriorate from the resistance of the wiring to it.

The parallel operation of Quant regulators has several useful advantages that are worth listing, therefore:

  1. Improved protection against dangerous voltage surges. Each regulator can dampen pulses with a current of 250A, bringing the voltage in the pulse to a safe level. Accordingly, four regulators in parallel can dampen pulses of 1000A (1 kA), and 8 regulators – up to 2000A (2 kA). There is nothing such “too much protection” when it comes to computer halls, data centers, where the data itself is often more expensive than cost of all the equipment.
  2. It is possible to increase the survivability of the system if the total power of regulators exceeds the load consumption. Then the failure of one or even several regulators will not interrupt the system, and you can even replace any of them during the operation (following safety measures and/or ensuring safe wiring when connecting). If there is a “reserve” of power for two regulators, it should be noted – the simultaneous failure of two regulators is less likely than one.
  3. It is possible to accumulate any necessary power simply “from a warehouse”, usually such powerful regulators are made to order, and many manufacturers simply do not have such offers.
  4. Simplification of cross-plugging, increase of reliability. Distribution of currents on several wires, from several terminal blocks increases reliability and reduces risk of bad contact and an overheat.

Quant voltage regulator: real inconspicuousness is small size and weight

One of the advantages of modern household appliances is their weight and dimensions. It’s hard to forget about a device when you stumble over it / stare at a large box hanging on the wall or standing on a shelf or floor even if its well-functioning. Modern electronic devices are always smaller than their electromechanical or electrical predecessors.

Power electronics are also a no exception, for example Quant voltage regulators have the following dimensions and weights:

Parameters Quant-5,5 Quant-7 Quant-9 Quant-11 Quant-14 Quant-18
Dimensions, mm., HxWxD 435х250х125 435х250х125 435х250х125 470х330х130 470х330х130 470х330х130
Weight, kg 11 11 11 15 15 16

The system of suspension of Quant voltage regulators provides for their installation even on a single-layer plasterboard. Therefore, there is no great need to take the Quant voltage regulators in the garage, shed or barn. The design of the voltage regulator is light, inconspicuous on the wall, the size is small, and most importantly – it is quiet, because there is nothing to hum, as is often the case with a bad form of mains voltage or the presence of a constant component of DC in the grid. Therefore, if desired, Quant voltage regulators can be installed even in the bedroom.

Стабилизаторы напряжения Quant / Стабілізатори напруги Quant

Quant voltage regulator: reactive power compensator (social function and economy)

Quant inverter voltage regulators are one of the best regulators on the market of Ukraine in terms of quality of work and functionality. There is a tradition in such products to lay social functions that benefit not only the consumer but also their environment. For example, when buying a hybrid Lexus, the buyer himself could not even think about saving gasoline on it. However, they will get this savings, and society will get much less damage from the exhaust of a hybrid car. The popularity of electric vehicles, despite the initial temporary inconveniences with charging (charging stations have not been common before) was ensured for the most part the desire not to shit in the atmosphere.

The Quant voltage regulator takes care not only of the consumer, but also of the power supply as a whole. It can also save the consumer a little more money if they pay for reactive power (office, production), but this is not always the case, because the household consumer does not pay for reactive energy at all, because the household meter does not take it into account.

The reactive power compensator in the Quant voltage regulator is able to compensate from 2A to 3A reactive current (at low mains voltage the compensation is bigger). These values are approximately equal to the value of the reactive component of 20 fluorescent lamps with ballasts with a power of 40W. Without a compensator, they would consume about 5.5A, with it it is 3.5А. A maximum of 500VAr*h of reactive power can be compensated in a month. Sometimes this is enough to enter the COS “φ” in terms of not exceeding its consumption, and to avoid paying for excessive generation of reactive power in the office or in small production. Of course, this will not replace compensators in large-scale production, there is a different approach (although the Quant voltage regulators themselves can provide regulation of large-scaleproduction, since they are able to work in parallel in a group, and the compensation currents are added together.).

Additionally, the power compensator operates as a noise filter from the mains and improves the voltage shape. nteresting fact: with the mass introduction of reactive power compensators in India there were an additional 30% of generating capacity “found”. That is, these are direct losses that occurred in transmission lines, transformers and generator windings. This is the social function – if each regulaor in each house (say from at least the end of last century) was equipped with the same reactive power compensator, the manufacturers would thus significantly improve the quality of grids, reduce sags at high loads and losses for power suppliers.

Quant voltage regulator: inconspicuousness

No house / apartment will be comfortable if the power supply is not of good quality, ie the lamps do not blink, no household appliances going out of order. Complete inconspicuousness of the voltage regulator is a dream of the consumer, because it is convenient to connect it once and forget about its existence; there is always 220V in sockets and no need to worry about the life of electronic devices.

Let’s consider the types of voltage regulators and their level of inconspicuousness.

Type: unnoticeable (but very cheap)

Inconspicuousness is a property of the cheapest voltage regulaors, usually made in China (with an extremely short regulation range and slow response to input voltage surges, such as servo-motor regulators). This means that after the installation of such a voltage regulator, it is unnoticeable whether you have it or not, because the voltage problems remain almost the same as without the regulator. If the voltage changes very slowly, or constantly overestimated/underestimated, then such a regulator still works, but until the first problem, surges or spikes.

Type: conspicuous (relay and thyristor regulators)

As the voltage regulator class increases, it can become noticeable, both in a good and not very good sense of the word. Conspicuous are simple thyristor step voltage regulators, with a small number of regulation stages. When responding, they convert a slow voltage change into a sharp jump, but this time within the norm according to GOST. Large changes at the input are reduced to relatively acceptable. Sudden short spikes, the beginning of a sharp surge – fly through the load.

Type: almost conspicuous (premium thyristor voltage regulators)

There are also so-called “matrix”, more complex and effective thyristor regulators, which partially show the property of “inconspicuousness”. Such voltage regulators perform their useful work, improving the quality of power supply, eliminating voltage spikes and smooth voltage changes with high accuracy. During their operation, even the flickering of incandescent lamps is not always noticeable (LED lamps without drivers are more sensitive, some flicker will still occur).

Type: inconspicuous (double conversion regulators)

Inverter voltage regulators, in particular Quant, operate inconspicuously, ie will not be possible to track their operation at an unstable output voltage, because at the output consumers of such regulators will always have a stable voltage with an accuracy of 0.5%

Стабилизаторы напряжения Quant / Стабілізатори напруги Quant

Quant voltage regulator: surge protection as a shield

In an article titled: ” Inconspicuousness or descreet” it was mentioned that voltage regulators have the property of protection against emergency voltage surges “at the cost of their lives”. But it is much better when the voltage reglator continues to serve correctly without self-sacrificeTo do this, Quant voltage regulators use a special absorber/limiter of dangerous voltage pulses.

The principle of the Quant regulator operation is as follows: if something really dangerous suddenly appears on the input, it is firsty limited to a level that is safe for the regulator itself (in practice these are pulses not higher than 600V or AC voltage with an effective value lower than 380), then the regulator brings these values to nominal, as its principle of operation allows it to “catch up” with rapid surges in voltage, so that they do not exceed dangerous values for it. Thus, one household voltage reguator is able to absorb a pulse that carries a current of up to 250A per pulse and keep it at a safe voltage level. The special energy absorber can absorb up to 30,000 J of energy many times without damage to itself. Also the absorber when the AC voltage level is exceeded (phase-to-zero inputs mixed up, (neutral wire disruption, phase to ground fault etc.), after holding for some time, decides to turn off the regulator input circuit breaker.

Existing pulse protection devices on the market (SPD, surge protection device) can usually be triggered only a few times, after which the replacement cartridge needs to be replaced. And at production, there can be hundreds or even thousands of such pulses a day from the grid (if an electric welding shop operates at the production). Such pulses are called switching overvoltages and reliable protection against them has not been invented to date. There were double conversion UPS, old ferro-resonance regulators and powerful and heavy filters popular abroad, but these are all obsolete and humming equipment, so the solution is rather questionable.

Modern Quant inverter voltage regulators, as well as similar first-generation regulators provide this safety option elegantly, reliably, silently and throughout the service life of the regulator.

The usual for modern regulators (since the last century) overvoltage protection on the output and input is also applied, but as mentioned above – its performance for the gentle electronics of the 21st century in the brutal power grids of the 20th century is not enough. In fact, it is built into the regulator “voltage relay”, but it does not return it to operation after triggering, and shuts down the regulator input circuit breaker completely.

During normal operation of the voltage regulator there will be no voltage exceedances at the output, but if the consumer turned on the “Transit” mode, then they will deprive themselves of the maximum protection that gave them a double conversion.

The “Transit” mode is designed to switch on the lighting in case of regulator failure and in cases when it is necessary to provide the consumer with standard overvoltage protection, reducing the chance of damaging the equipment (for example, the regulator will turn off if the voltage at its input is above 380V.

Стабилизаторы напряжения Quant / Стабілізатори напруги Quant

Quant voltage regulator: current protection (protecting ourselves and neighbors)

Quant voltage regulators have several types of current protection: fast (with an ECO mode), slow, input and output.

Slow protections allow the regulator to deliver more current than the rated one in the short term, for example, to start heavy loads with a in-rush starting current. They have no special features, because with prolonged overload, the regulator de-energizes the output and after a few seconds makes a second attempt to start. After several attempts, the voltage regulator consider that there is a short circuit on its output and will turn off the input circuit breaker. The higher the multiplicity of overload, the less time is given to try to start (see operations manual).

Fast protection is a maximum current limiter. It is interesting that a few manufacturers have implemented a fast protection with such diligence (usually electronic regulators do not limit the output current, and immediately turn off when it is exceeded).

Quant inverter voltage regulators are able to limit the output current up to a short circuit on its output, ie if a compressor, industrial fan or compressor, or powerful pump is fed through it, at the start, when there is almost a short circuit, the inverter regularor, even at zero or low voltage on its output (which is sagged by a powerful engine) will still give it a starting current and allow it to start easily.

Let’s assume that the consumer often uses a circular saw, and each time it starts up, the grid sags in a way that is felt by neighbors on the same line. To avoid such a situation an ECO mode is implemented in Quant, ie at the time of starting overload, the power consumed from the grid is equal to that at the output of the regulator at any time. And the output power (full, active + reactive) is always equal to the sum of the voltage and current. At the time of start, when the current is maximum, but the voltage is minimal (sagged by load) – the power is even less than at the rated output voltage after starting the motor. Therefore, after setting Quant to power such a machine or engine at the time of their start, the grid will stop sagging, and in fact, even nominal consumption will be achieved smoothly, not by a sudden spike, which also contributes to the safety of neighbors from surges.

Of course, soft starters were not invented by us, such a solution already existed, but they were expensive, and in Quant regulators it is a free, standard option, simply a part of usual functionality of the regulator. Yes, voltage regulators are bought not for this, but there is nothing that would be “too much” for the consumer, if it can be useful to them.

Стабилизаторы напряжения Quant / Стабілізатори напруги Quant

Quant voltage regulator: sine correction

Probably almost everyone knows that there is 220V/50Hz in the grid and the form of voltage is sinusoidal. For those who don’t – Google is always ready to help. The 230V standard has long been introduced, but out of habit people still assume that the rating is 220V. So, why is the shape sinusoidal? Because a sine is the projection of a rotating point on the coordinate axis. If the second coordinate axis is time, then a sine will appear on the graph.

Since we are talking about rotation, it is already clear that the main fan of pure sine is an AC motor (single-phase or three-phase). In the sinusoidal form, there is only one frequency – 50Hz. If the shape is distorted, then there are harmonics and higher frequencies – 100, 150, 200, 250Hz, etc. Higher speeds do not help the motor, but overheat its windings, besides, there is a hum.

Therefore, it is better to always have exactly 220V, 50Hz and pure sine than to worry about the damage from harmonics. In this case, there will be no hassle, because the connected equipment will work properly, because for any electronics, motor or lamp designed for 220 / 50Hz, these will be ideal operating conditions. How do Quant household voltage regulators correct the sine? Easily: makes measurements of the voltage in the network 40,000 times per second (800 points per network frequency period), and at each point compares with the sample sine in the memory. If there is no response, it makes corrections by adjusting the instantaneous values of the output voltage.

By the way, about the frequency. This is the only thing that never needs to be fixed in our grids. We have a single power system, and if this frequency was not maintained throughout the country, the system would not work. Therefore, the story that “under heavy load the frequency sags”, “decreases” is from the category of “urban legends”. That’s why the output of the Quant inverter voltage regulator is always the same frequency as the input.