– Suitable for 3-phase equipment and consumers alone
– Suitable for single-phase consumers installed in a three-phase distribution system
– It has a protection system against input and output voltages outside the permissible range
– It has a filter to protect the consumer devices from noise and electrical disturbances in the city
– Has an audible alarm
– Equipped with a delay circuit
– It has a non-standard voltage protection system in each of the phases