With the increasing demands on protective measures, CITEL has developed the VG technology on the basis of many years of research and expertise. With its unique functional principle, VG technology fulfils all the requirements that modern lightning and surge technologies should meet.

As a provider in the field of lightning and surge protection, we pursue the claim of ensuring safety through research and experience for your needs individually and with the best possible equipment.

GAS FILLED SPARK GAP (GSG)
The VG arresters are equipped with gas-filled spark gaps. equipped. These specific components are the result of the long experience of CITEL, a world leader in this sector. The GSG can be adapted to different energy grids and ensure perfect grid stability.

OPTIMAL PROTECTION AND HIGH SHOCK RESISTANCE
The VG technology offers an excellent protection level (Up) and a high discharge capacity. With a minimal space requirement, the VG arresters are equivalent to a combination of SPD type 1, type 2 and type 3 or type 2+3. Comparable performance can only be achieved by combining staggered surge arresters.

NO PASSIVE AGEING
Arresters based on varistors are subject to constant leakage currents, which over time and under certain conditions can lead to premature ageing and early death. Arresters with VG technology have no leakage and operating current, so the varistors are no longer subject to ageing.

INCREASED ROBUSTNESS AND RELIABILITY
All components of the VG arresters are designed for high pulse currents without the use of electronic auxiliary devices such as triggers, which in turn multiplies durability and reliability. The use of triggers, on the other hand, significantly reduces the service life.

SAFE DISCONNECTION AND DEVICE STATUS SIGNALLING
The VG arresters are equipped with disconnecting devices through which signalling and signal states are activated when protection is no longer given. A complete status monitoring is guaranteed at all times, unlike arresters with "triggered spark gaps".

NO MAINS FOLLOW CURRENT (SHORT CIRCUIT CURRENT)

Air spark gaps are often used for lightning current arresters (type 1) and generate short circuits during operation ("mains follow current"): This behaviour can trigger a fuse or circuit breaker and creates a thermal load on the installation. VG technology, on the other hand, limits the voltage and does not generate a short circuit.

SIMPLE SURGE PROTECTION COORDINATION
During installation, downstream arresters must be installed at a coordinated distance from the primary arresters to ensure good energy distribution and prevent overloading. With a primary VG arrester, special installation care is eliminated so that no incorrect installations are possible.

CERTIFICATIONS
The VG arresters developed by CITEL for low-voltage networks and photovoltaic applications are tested by independent laboratories and certified in accordance with the latest versions of the international standards.