The 1-pole indoor disconnector L 31 is manufactured by Driescher. Operating on a 15 kV voltage, it has a rated current of 1,600 A and a short-duration power-frequency test level of 50 kV. Designed according to the standards of DIN EN 50152-2 03/98, it features a 16.7 Hz frequency and a maximum withstand current of 80 kA.