IT7927881A0 - DIGITAL OVERCURRENT RELAY. - Google Patents

DIGITAL OVERCURRENT RELAY.

Info

Publication number
IT7927881A0
IT7927881A0 IT7927881A IT2788179A IT7927881A0 IT 7927881 A0 IT7927881 A0 IT 7927881A0 IT 7927881 A IT7927881 A IT 7927881A IT 2788179 A IT2788179 A IT 2788179A IT 7927881 A0 IT7927881 A0 IT 7927881A0
Authority
IT
Italy
Prior art keywords
overcurrent relay
digital overcurrent
digital
relay
overcurrent
Prior art date
Application number
IT7927881A
Other languages
Italian (it)
Other versions
IT1126491B (en
Inventor
Depuy Robert Perry
Leitten Arthur Henry
Original Assignee
Gen Electric
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US05/971,312 external-priority patent/US4219858A/en
Priority claimed from US05/971,313 external-priority patent/US4219860A/en
Application filed by Gen Electric filed Critical Gen Electric
Publication of IT7927881A0 publication Critical patent/IT7927881A0/en
Application granted granted Critical
Publication of IT1126491B publication Critical patent/IT1126491B/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/093—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means
    • H02H3/0935—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means the timing being determined by numerical means
IT27881/79A 1978-12-20 1979-12-07 DIGITAL OVERCURRENT RELAY IT1126491B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/971,312 US4219858A (en) 1978-12-20 1978-12-20 Overcurrent relay apparatus
US05/971,313 US4219860A (en) 1978-12-20 1978-12-20 Overcurrent relay apparatus

Publications (2)

Publication Number Publication Date
IT7927881A0 true IT7927881A0 (en) 1979-12-07
IT1126491B IT1126491B (en) 1986-05-21

Family

ID=27130545

Family Applications (1)

Application Number Title Priority Date Filing Date
IT27881/79A IT1126491B (en) 1978-12-20 1979-12-07 DIGITAL OVERCURRENT RELAY

Country Status (8)

Country Link
BR (1) BR7908424A (en)
DE (1) DE2950031A1 (en)
ES (1) ES8101813A1 (en)
FR (1) FR2445051A1 (en)
GB (1) GB2037104B (en)
IT (1) IT1126491B (en)
MX (1) MX148544A (en)
SE (1) SE7910486L (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2081994B (en) * 1980-08-11 1983-04-07 South Eastern Elec Board Pulse sampled e l c b
JPS58172928A (en) * 1982-04-01 1983-10-11 株式会社大隈鐵工所 Device for monitoring motor
DE3311240A1 (en) * 1982-04-05 1983-10-13 Siemens-Allis, Inc., 30338 Atlanta, Ga. Monitoring apparatus with a switching device
FR2538908A1 (en) * 1982-12-30 1984-07-06 Petercem Sa METHOD FOR MEASURING ALTERNATING CURRENT IN RELATION TO THE NOMINAL INTENSITY, AND CORRESPONDING ELECTRONIC CIRCUIT
US4553187A (en) * 1983-09-14 1985-11-12 Allen-Bradley Company Overcurrent detection device
US4589052A (en) * 1984-07-17 1986-05-13 General Electric Company Digital I2 T pickup, time bands and timing control circuits for static trip circuit breakers
DE3519262A1 (en) * 1985-05-24 1986-11-27 Siemens AG, 1000 Berlin und 8000 München METHOD FOR GENERATING A TRIGGER SIGNAL DEPENDING ON THE SIZE AND DURATION OF AN OVERCURRENT
DE3522738A1 (en) * 1985-06-21 1987-01-02 Siemens Ag METHOD FOR GENERATING A TRIGGER SIGNAL DEPENDING ON THE SIZE AND DURATION OF AN OVERCURRENT
DE3522739A1 (en) * 1985-06-21 1987-01-02 Siemens Ag METHOD FOR GENERATING A TRIGGER SIGNAL DEPENDING ON THE SIZE AND DURATION OF AN OVERCURRENT

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4017766A (en) * 1975-08-04 1977-04-12 Westinghouse Electric Corporation Inverse time-overcurrent relay using successive linear approximations

Also Published As

Publication number Publication date
ES487161A0 (en) 1980-12-16
GB2037104A (en) 1980-07-02
FR2445051B1 (en) 1984-12-07
SE7910486L (en) 1980-06-21
MX148544A (en) 1983-05-03
FR2445051A1 (en) 1980-07-18
DE2950031A1 (en) 1980-07-10
ES8101813A1 (en) 1980-12-16
GB2037104B (en) 1982-10-27
BR7908424A (en) 1980-09-23
IT1126491B (en) 1986-05-21

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