MCS enclosures certified for Seismic Zone 3

Guided by customer feedback, the Eldon product management team continues to fulfil and prioritize market requirements. An important aspect is testing and certifying the products to ensure they serve customers in the best possible way.

Located in Spain, Virlab S.A. is accredited by the Spanish National Accreditation Entity (certificate number 54/LE131). Over more than 30 years the company has acquired extensive experience in seismic and vibration tests, thereby becoming a reference within the industrial sector.

Two seismic tests

In collaboration with Virlab S.A., Eldon has performed two seismic tests on its mild steel combinable enclosure (MCS) range. The tests were performed in accordance with Telcordia GR-64-CORE Issue 4, March 2012 which, due to its high requirements, is the most common standard used by enclosure manufacturers for seismic certifications.

The tests were carried out on the following enclosure configurations:

1. Combinable floor standing enclosure, mounted on a plinth height 100 mm, for seismic zone 3;

2. Combinable floor standing enclosure, equipped with a swing frame and mounted on a plinth height 100 mm, for seismic zone 3. By carrying out this test, Eldon differentiates itself from its competitors, since this configuration is typically required by electrical substation cabinets.

As a result, we are pleased to announce that Eldon’s combinable enclosure range is now certified for Seismic Zone 3, according to Telcordia GR-64-CORE Issue 4, March 2012.

Tests were carried out on MCS enclosures with dimensions 2000 mm (height) x 800 mm (width) x 600 mm (depth). Although the enclosure’s certification is only valid for the sizes and configuration tested, Eldon states that other MCS dimensions are also considered as earthquake resistant, without using any seismic accessory, provided that the following criteria are met:

  • The combinable enclosure has been assembled according to Eldon’s mounting instructions;
  • The enclosure configuration is at least as stable as the configuration tested; particularly relevant are the height, base area and weight distribution;
  • The earthquake standard and the frequency spectrum are similar.

We strongly recommend that you read our new White Paper – Earthquake, where you will find further details of the seismic tests described above.