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Quant voltage regulator: surge protection as a shield

Стабилизаторы Напряжения Quant / Стабілізатори Напруги Quant

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.

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