The system comprises a battery tray (1) and a trough holder (2) for the assembly of battery tray in a battery box of the wind turbine. The trough holder has a bearing face (3) by which the battery tray is placed on the holder. The trough holder has a form-...

The device has an energy storage unit (4) i.e. capacitor, comprising a plus pole (5) and a minus pole (6). A directional electric current meter (10) comprises a decoupling component, a bypass diode (11) and a current-measuring element (12) i.e. fuse. The b...