POWER ELECTRONICS OBTAINS IAC AFLR 31,5 kA-0,3 s CLASSIFICATION FOR THE VS65 SOFT STARTER
Power Electronics successfully passed the internal arc test according to the international standard IEC 62271-200 and obtained IAC A FLR 31.5 kA-0.3 s classification for our METAL CLAD cell VS65ARC soft starter.
This new certification guarantees the safety of personnel should an internal arc fault occur.
An internal arc fault is a high power electrical discharge between 2 or more drivers. For this test, a short-circuit is caused in the cell busbar. This discharge causes overheating which can reach temperatures up to 20,000°C. The resulting heat creates gases, incandescent particles and an increase in internal pressure which can lead to a deterioration of mechanical parts and an explosion. This can cause severe injuries or death to people nearby.
In the case of Power Electronics cells, the explosion caused by a possible failure of internal arc is contained by the carefully designed envelope that including doors and other access points to the cell. During the explosion, the internal pressure and emission of gases is passed through internal conduits that release the force of the explosion in a safe and controlled manner. It ensures that there is no risk to people who might be nearby at the time of a failure. To pass the test, flammable panels placed 30 cm from the unit and should not ignite during or after the explosion.
The classification includes the accessibility type, classified accessible sides, the arc current and duration. In our case, we have achieved classification for all 4 sides, authorized personal accessibility and one of the highest internal arch currents for this kind of product, 31.5 KA
The test was carried out in the laboratories of TECNALIA, headquartered in Zamudio (Bilbao) They have the biggest power lab for Spain and Portugal connected to the network at 220kV with an output of 300 MVA – 1 s. The TECNALIA power laboratory is accredited by ENAC with No. 4 / LE148 which allows them to perform this type of testing.