Single-phase and three-phase, symmetrical and asymmetrical models.
Three-phase models stabilize based on the 3 phase's average. This is indicated for balanced nets, considering a maximum charge oscillation, between phases, of 50%.
They also allow the independent stabilization in each of the phases, being indicated for unbalanced nets and unbalanced charges, between phases, up to 100%.

All models fulfil EMC 89/336/CEE and 73/23/CEE norms/directives.