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

Стабилизаторы напряжения Quant / Стабілізатори напруги Quant

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.

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