US2384375A
(en )
1945-09-04
Protection of electric systems
SU412653A1
(enrdf_load_stackoverflow )
1974-01-25
US2969495A
(en )
1961-01-24
Current translating system with semiconducting p-n junction rectifiers
US3414772A
(en )
1968-12-03
Differential relay with restraining means responsive to transformer bank voltage
US3405320A
(en )
1968-10-08
Network protector with static and circuit
US2584765A
(en )
1952-02-05
Distance relay protective system
US3912979A
(en )
1975-10-14
Pilot wire protective relaying apparatus
US3710188A
(en )
1973-01-09
High tension network distribution system
US2233362A
(en )
1941-02-25
System of electric distribution
US2733399A
(en )
1956-01-31
Circuit breaker -control system
US2736821A
(en )
1956-02-28
Load transfer relays
US1165844A
(en )
1915-12-28
Protecting means for electrical distribution systems.
US2783394A
(en )
1957-02-26
Non-frequency responsive a.-c. voltage relay for distribution systems
US2307500A
(en )
1943-01-05
Protective relay system
US1707269A
(en )
1929-04-02
Electrical distribution system
US1315809A
(en )
1919-09-09
Planoaraph co
US1341486A
(en )
1920-05-25
Protective system
US3114140A
(en )
1963-12-10
Pilot-wire systems
US2631248A
(en )
1953-03-10
Inverter control automatic changeover for single or three-phase application
US1297936A
(en )
1919-03-18
Protection of parallel feeders.
US2459639A
(en )
1949-01-18
High-speed sequential relaying system
US2199658A
(en )
1940-05-07
Electric protective system
US2376767A
(en )
1945-05-22
Discriminating protective relaying apparatus
SU736251A1
(ru )
1980-05-25
Устройство дл защиты линии от замыкани на землю в электрической сети переменного тока с изолированной нейтралью
US2306591A
(en )
1942-12-29
Electric protective system