Rusty fuses for local supply

Most likely an industrial CEE 63 A connector with three upstream AEG NT-1 fuses (200 A, 500 V), documented at the Völklinger Hütte.

 

The oversized protection fuses supply the distribution bus, while the connector provides branch access with a lower current rating.

 

With 3 phase and 380 Vm the rated power is approx. 132 kVA

Done