For several years, the MV e²TANGO-800 protection tests have been carried out in the Departments of Energa Operator SA, and in recent months also HV e2TANGO-2000. On the basis of positive opinions, innovative solutions were implemented consisting of the supply of MV e²TANGO-800 protection for the GPZ 110/15 kV station, the modernization of the fields consisting in the replacement of the SCI-4 circuit breaker with e²BRAVO and the older generation of protection devices for e²TANGO-800 in GPZ 110/15 stations kV (complete retrofit). An interesting solution is also the ATS automatics based on the e²TANGO-800 protection relay in 220/110/15 kV system stations and the GPZ 110/15 kV type, installed for the own needs of 0.4 kV stations.