Very Fast Transients

Analysis of very fast transient phenomena in power systems and their impact on equipment and system stability

What are Very Fast Transients?

Very Fast Transients (VFT) are electromagnetic phenomena with rise times in the nanosecond range that occur in gas-insulated substations (GIS) and other high-voltage equipment during switching operations. These transients can cause insulation stress and equipment damage if not properly analyzed and mitigated.

Key Applications

Critical areas where VFT analysis is essential

GIS Design

Gas-insulated substation design and insulation coordination

Equipment Protection

Protecting sensitive equipment from VFT-induced stress

Insulation Coordination

Optimizing insulation levels for VFT withstand capability

Industry Standards & Compliance

Our VFT studies adhere to internationally recognized standards

IEC 62271-203

High-voltage switchgear and controlgear - Gas-insulated metal-enclosed switchgear

CIGRE TB 577

Electrical Transient Interaction between Transformers and the Power System