Bidirectional voltage regulator VR EQX

single-phasethree-phasefor photovoltaic applications

Salicru's VR EQX range of voltage regulators for mains-connected photovoltaic installations prevent outages due to over/under voltage in the power line. Most regulations governing this type of system’s connection to the grid require solar inverters to shut down if their voltage exceeds certain limits. In unstable networks, this causes unwanted stoppages in the photovoltaic installation, with the consequent loss of power generation and a decrease in the useful life of solar inverters. Since, in the vast majority of cases, the surplus energy generated is injected into the grid (in return for compensation), traditional unidirectional voltage stabilisers are unsuitable because they can’t carry reverse current. Given that it constitutes a breach of regulations and exposes the loads to serious danger, manipulating the inverter is not a viable solution to the problem either. These regulators record and manage the grid voltage at all times, responding with quick and precise voltage jumps during the short period of time it may be required for the vast majority of national grids. Both single-phase and three-phase models are available, the latter providing independent regulation for all three phases.