Line breakdowns, atmospheric phenomena, continuous load variations and disturbances generated by the users themselves do not allow each device to be guaranteed a constant voltage within the tolerance range provided for by the supply contracts. Often, this tolerance is insufficient for the most sensitive devices. Other times, the network voltage reaches levels that exceed the nominal value provided by 15, 20 and even 30%.

Voltage fluctuations are particularly insidious disturbance phenomena, since they are not obvious and can only be detected by using specific instruments. In their presence, electrical devices apparently maintain a state of correct operation, which sometimes hides serious problems, sometimes irreparable.

The “ERESTAB” range of electrodynamic voltage stabilisers is the reliable, tested and economical solution to the damage caused by voltage fluctuations. The use of this equipment is a real investment, because eliminating service problems means reducing costs and increasing productivity.

They are offered in single-phase (up to 350 kVA) and three-phase (up to 4200 kVA) versions, and different degrees of IP protection. The three-phase models can have regulation on the average of the three phases (T models) or independent regulation per phase (Y models).