Current protections
Overcurrent relays A 15, A 15 S1
Three-phase overcurrent protection A 32 DX
Overcurrent time protections without auxiliary feeding AM 12 X, AM 21 X, AM 31 X
Overcurrent time protections AT 12 X1, AT 21 X1, AT 31 X1
Overcurrent time protections AT 12 DX, AT 21 DX, AT 31 DX
Thermal overcurrent time-lag relays AB 21, AB 31
Voltage protections
Three-phase voltage protection V 32 DX0
Single-phase voltage time protection VT 12 X
Single-phase voltage time protection VT 12 DX0
Directional protection system for grid networks VS 300 X
Differential and pilot-wire protections
Phase comparison protection S 103 B1
Line protections
Three-phase autoreclosing OZ 33 X
Earth and ground fault protections
Earth protection for generator rotors GR 12 S2
Directional earth-fault protections GSC 12, GSS 12
Directional earth-fault protections GSC 12, GSS 12
(operating instruction)
Earth-fault and reverse power protections GSCT 12 X1, GSST 12 X1
Relays for signalling of ground connections GV 12 KC, GV 22 KC
Current injection unit PIZ 50 V
Rotating electric machine protections
Generator inverse sequence current protection N 12 X
Loss of excitation protection D 21
Frequency protections
Test equipment
Solid state modular protection system ALOX
Protection for feeders, busbars and substations ALOX A 100, A 200
ISO 9001:2008
DOHNÁLEK
ochrany pro energetiku
Úpská 132
542 23 Mladé Buky
Czech Republic
tel: +420 499 873 443
fax: +420 499 873 442
e-mail: dohnalek@dohnalek.cz
website: www.dohnalek.cz