The largest part of the collection is represented by rotating electric direct- and alternating-current machines. It contains experimental models of early machines for transforming mechanical energy into electric power and vice versa. The machines of domestic provenance are represented, in particular, by the designs of Frantisek Krizik and Emil Kolben (EAS, later CKD), the collection comprises also other producers (Bartelmus-Donat, Sousedik, Skoda and others). The collection contains also traction motors for the electric line (Krizik) and electromobiles (Kolben, Sousedik). Foreign products are more frequently represented by machines from Germany and Austria. The collection also contains two high- frequency alternators of French provenance (SFR) that were used in transmitters. The fund also includes controllers and motor starters.
Moreover, the collection contains the device serving for distribution of electric energy (isolators, switches, circuit breakers, insulators, complete switchboards, contactors, fuses, small fittings, etc.).
The collection of chemical and thermoelectric sources of electric power includes principal elements of most galvanic cells used in our country and several batteries of thermoelectric cells heated by gas or liquid fuel burners. The collection of electrostatic devices consist mostly of electrostatic sources, demonstration aids and, last but not least, a group of lightning rods.