Protection against transient overvoltage

Product Details

Adequate protection is essential to avoid significant damage to equipment and financial losses.

As a result, “contaminated” electrical energy conditioning is becoming an essential objective for companies, not only in new installations but also in existing installations, as these, adapted some years ago, may no longer be safe.
One of the main disturbances that may affect installations is transient disturbances. Transient overvoltage appears as high voltage peaks (kV) during a short period of time.
The most visible and destructive cause of damage from transient overvoltage is the one created by atmospheric discharges (lightning). However, this is not the most common origin of this type of disturbance because in most of the cases, the main sources of transient overvoltage are within the installation itself and are caused by, among other seasons:
• Operation of automatic switches and fuses
• Connection and disconnection of inductive loads
• Switching of motors and machines
• Electrostatic discharges
• Operation of power factor correction capacitors
• Transfers of energy in power generator sets
VP Class II overvoltage protection equipments are used to protect the installation and eliminate the effects of the transient overvoltage. These devices earth the high current generated as a result of the aforementioned overvoltage events and maintain a stable residual voltage that can be supported by the equipments installed downstream.