Elektronické jištění stejnosměrných elektrických obvodů

Abstract

Current modern low-voltage modular mechanical circuit breakers enable safe switch off in a short circuit or overcurrent, but these devices have many disadvantages. One major disadvantage is the generating overvoltage on the network side when the device is turned off. In contrast, semiconductor circuit breakers (SSCBs) are able to eliminate these disadvantages. The objective of this paper is to compare different semiconductor switching components with object to their characteristics and usability in hazard states. The main object of a semiconductor circuit breaker is to protect electrical equipment against destruction. The following are the types of semiconductor circuit breaker that are described in principle with relief auxiliary circuits.. Here are desribed the principles of modular mechanical circuit breakers, fuses and their parameters are compared here with a solid semiconductor circuit breaker (SSCB). Based on these knowledge, a real laboratory sample was designed using IGBT power transistros including the user interface. It is confirmed here that the semiconductor circuit breaker offers many benefits to protect both the DC and AC networks.