Forming converters has always been an integral part of our cleaning and inspection work. This can now be done on your stored converters on your site, with our newly-developed forming case!
Inverters in storage (such as frequency converters, rectifiers, inverters and power converters, etc.) are considered critical spare parts. They are often stored for several years, and must be fully functional when needed.
With conventional forming, the applied voltage is increased in stages. With the BVS protective process, the voltage is adjusted in relation to the continuous status analysis of the characteristic values of the intermediate circuit capacitors. In doing so, we ensure that forming only ceases when the specifications are within their tolerances. We therefore comply with DIN EN 60384-4.
In the conventional forming process, an initially rapidly increasing voltage is applied to the module. This gradually flattens out before the operating voltage (600 V in this example) is reached. As a result, the current flow shoots up at the beginning of the process. The load on the capacitors is too high if there is already an overlaid insulation layer.
With the BVS protective process, the voltage is increased in slowly rising and flattening waves. This is done so carefully that even overlaid insulation layers can regenerate, as the electric load only increases slowly. Only after forming has been completed do we apply a full load to the module, to test the resilience of the capacitors.
➊ Your converters are formed with the help of a forming case, and using a protective process, both of which have been developed by BVS. Up to 2 devices can be formed at the same time.
➋ Each formed converter is given the BVS seal of approval, on which the latest forming date is noted, along with the expected date of the next forming operation. You will also be given a log of all the forming work that has been carried out as part of the operation.