The energy transition is accompanied by electrification. This creates increasingly higher demands on our electricity grid as a whole and on all individual components that form part of it. This includes for instance transformers, cables and safety switches. These components must of course be able to withstand the nominal full load of the electricity grid. However, it is also very important that, in the event of a short circuit or lightning strike, these components still continue to function. To demonstrate this function and for certification, these components are subjected to short-circuit tests. The Make Switch or Making Switch plays a crucial role in a short circuit test.

Make Switch Equipment

The Make Switch works as follows. During a short-circuit test, the required short-circuit current is either generated by a short-circuit generator or taken from the electricity grid. At the start of the trial, the Make Switch is in the open position. When open, the Make Switch must be able to withstand the short-circuit voltage used, and prevent current from flowing. The current (alternating voltage) has the shape of a sine wave. The moment an artificial short circuit has to be made, the contacts of the Make Switch close very quickly and the short circuit current is transferred to the test object. Usually that is right on top or just at the zero crossing of current.

Compared to other equipment, the MTSA Make Switch is both more environmentally friendly and cheaper to use. The MTSA Make Switch uses compressed air for insulation, unlike other equipment that often works with the strong greenhouse gas SF6.