ailures with switchgear can cause an expansion of gas, air and oil where oil filled switchgear is employed. This happens at a rapid rate causing a pressure spike, if Pressure Relief Venting is not installed in the surround building structure, there is a genuine risk of structural damage being caused.
An arc fault can result in a peak overpressure spike in around 10ms, so the Pressure Relief Vents should be of the counter-weighted design such as Apreco’s due to their quick re-acting blade systems.
The Pressure Relief Vents should be self-closing so as to contain any resulting fire and to maintain the security of the room.
Apreco’s range of high quality Pressure Relief Vents which have a 4-hour fire resistance rating which is important. These units are designed and built in the UK so we have full control over the quality we supplier to our clients being ISO 9001:2008 QMS for the ‘design and manufacture of these products’.