Have your bearing assemblies regularly formed on-site before use!
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!
The problem: Degeneration of the oxide layer
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.
The oxide layer, which acts as an insulating layer (dielectric material) in the intermediate circuit capacitors, degrades over time without permanently applied voltage. The oxide degeneration reduces the insulation voltage, and defects can occur in the dielectric material. If such converters are put back into operation, short-circuiting may occur at these points. In the worst case, this may lead to the capacitor bursting or exploding. The resulting damage is often immense, and ranges from defects in neighbouring parts to completely destroyed modules. This can lead to prolonged system downtime.
The solution: Regular forming!
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.
A: Capacitor load, B: Time, C: Power