Extremely high breaking capacity fuses: protection of power semiconductors as per IEC standard 60269-1 and -4 250 V voltage rating complying with IEC 33 aR Class (ratings from 400A to 525AA URGG - 800A to 2050A URGH) complying VDE 0636-23 and IEC 60269-4 2 types comlying with BS 88-4 - without indicator - with separate indicator