Abstract: An isolating device for a power semiconductor comprising n power terminals for a power grid comprises n module terminals, n grid terminals, n connecting lines which connect the module terminals and grid terminals and have overcurrent fuses, and a tripping controller. The tripping controller includes a detector for detecting the rupture of an overcurrent fuse and a tripping unit for tripping an overcurrent fuse. A power module contains a power semiconductor and an isolating device. A system installation contains at least two power modules connected in parallel. In a method for operating an isolating device, at least one of the overcurrent fuses is tripped upon a predetermined tripping criterion being met.

Abstract: An isolating device for a power semiconductor comprising n power terminals for a power grid comprises n module terminals, n grid terminals, n connecting lines which connect the module terminals and grid terminals and have overcurrent fuses, and a tripping controller. The tripping controller includes a detector for detecting the rupture of an overcurrent fuse and a tripping unit for tripping an overcurrent fuse. A power module contains a power semiconductor and an isolating device. A system installation contains at least two power modules connected in parallel. In a method for operating an isolating device, at least one of the overcurrent fuses is tripped upon a predetermined tripping criterion being met.

Abstract: A current regulated circuit arrangement for controlling a power semiconductor transistor, as example a MOSFET or IGBT power transistor, that includes at least two mirror-symmetrically arranged regulated power sources and an output voltage regulator. A first regulated power source is fed from an unregulated power source and controls the gate of the power transistor such that the power transistor is switched into the conductive state. A second regulated power source is fed from an unregulated power source and controls the gate of the power transistor such that the power transistor is switched into the non-conductive state. A voltage regulator or limiter limits the current at the gate of the power transistor to a operably suitable maximum value.