Current protections


pdf  Overcurrent relays  A 15, A 15 S1


pdf  Three-phase overcurrent protection  A 32 DX


pdf  Overcurrent time protections without auxiliary feeding  AM 14 X, AM 22 X, AM 32 X


pdf  Overcurrent time protections  AT 12 X1, AT 21 X1, AT 31 X1


pdf  Overcurrent time protections  AT 12 DX, AT 21 DX, AT 31 DX


pdf  Thermal overcurrent time-lag relays  AB 21, AB 31


pdf  Motor protection  AB 31 DX


Voltage protections


pdf  Voltage relays  V 15, V 15 S1


pdf  Three-phase voltage protection  V 32 DX0


pdf  Single-phase voltage time protection  VT 12 X


pdf  Single-phase voltage time protection  VT 12 DX0


pdf  Directional protection system for grid networks  VS 300 X


Differential and pilot-wire protections


pdf  Differential protection  R 30


pdf  Phase comparison protection  S 103 B1


Line protections


pdf  Distance protection  D 115


pdf  Distance protection  D 400


pdf  Three-phase autoreclosing  OZ 33 X


Earth and ground fault protections


pdf  Generator protection  F 11 X


pdf  Earth protection for generator rotors  GR 12 S2


pdf  Directional earth-fault protections  GSC 12, GSS 12


pdf  Directional earth-fault protections  GSC 12, GSS 12   (operating instruction)


pdf  Earth-fault and reverse power protections  GSCT 12 X1, GSST 12 X1


pdf  Relays for signalling of ground connections  GV 12 KC, GV 22 KC


pdf  Insulation control  GZ 12 z


pdf  Current injection unit  PIZ 50 V


Rotating electric machine protections


pdf  Generator inverse sequence current protection  N 12 X


pdf  Loss of excitation protection  D 21


Frequency protections


pdf  Frequency relay  F 15


Test equipment


pdf  Portable test equipment  PZ 1


Solid state modular protection system ALOX


pdf  Protection for feeders, busbars and substations  ALOX  A 100, A 200


pdf  Motor protection  ALOX  M 201


pdf  Motor protection  ALOX  M 205


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ISO 9001:2016






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542 23 Mladé Buky

Czech Republic


e-mail: dohnalek@dohnalek.cz

website: www.dohnalek.cz