IT1105571B - Apaprecchiatura per la rilevazione di un segnale di fase alto da un circuito di carico ac (in alternata) multifase - Google Patents
Apaprecchiatura per la rilevazione di un segnale di fase alto da un circuito di carico ac (in alternata) multifaseInfo
- Publication number
- IT1105571B IT1105571B IT41588/78A IT4158878A IT1105571B IT 1105571 B IT1105571 B IT 1105571B IT 41588/78 A IT41588/78 A IT 41588/78A IT 4158878 A IT4158878 A IT 4158878A IT 1105571 B IT1105571 B IT 1105571B
- Authority
- IT
- Italy
- Prior art keywords
- phase
- detection
- load circuit
- phase signal
- signal
- Prior art date
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
- H02H3/083—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 for three-phase systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
- H02H1/0069—Details of emergency protective circuit arrangements concerning transmission of signals by means of light or heat rays
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Emergency Protection Circuit Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/802,930 US4139878A (en) | 1977-06-02 | 1977-06-02 | Apparatus for sensing a high phase signal from a multi-phase AC load circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7841588A0 IT7841588A0 (it) | 1978-06-01 |
IT1105571B true IT1105571B (it) | 1985-11-04 |
Family
ID=25185123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT41588/78A IT1105571B (it) | 1977-06-02 | 1978-06-01 | Apaprecchiatura per la rilevazione di un segnale di fase alto da un circuito di carico ac (in alternata) multifase |
Country Status (8)
Country | Link |
---|---|
US (1) | US4139878A (it) |
JP (1) | JPS541850A (it) |
CA (1) | CA1101065A (it) |
DE (1) | DE2823444A1 (it) |
FR (1) | FR2393452A1 (it) |
GB (1) | GB1605055A (it) |
IT (1) | IT1105571B (it) |
NL (1) | NL7805976A (it) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4245185A (en) * | 1979-03-23 | 1981-01-13 | Westinghouse Electric Corp. | Solid state circuit breaker with three phase capability |
US4300182A (en) * | 1979-08-09 | 1981-11-10 | Schweitzer Edmund O Iii | Metering and protection system for an A.C. power system |
DE3225829A1 (de) * | 1982-03-31 | 1983-10-13 | Sprecher & Schuh AG, 5001 Aarau, Aargau | Schutzrelais-schaltung |
US4698621A (en) * | 1984-09-25 | 1987-10-06 | Masot Oscar V | Circuit breaker panels with alarm system |
US4715051A (en) * | 1985-04-12 | 1987-12-22 | Giardina Joseph J | Electronic potentiometer |
US4672246A (en) * | 1986-03-10 | 1987-06-09 | Honeywell Inc. | Low offset MOSFET transistor switch control |
US4682061A (en) * | 1986-05-01 | 1987-07-21 | Honeywell Inc. | MOSFET transistor switch control |
US5193042A (en) * | 1990-12-07 | 1993-03-09 | Dielpromex S.A. De C.V. | Automatic energizing damping device |
US5925888A (en) * | 1997-05-08 | 1999-07-20 | Paragon Electric Company, Inc. | Optocoupler input expansion circuit |
AU2008321378B2 (en) | 2007-11-13 | 2012-04-12 | Emerson Climate Technologies, Inc. | Three-phase detection module |
US20090283848A1 (en) * | 2008-05-13 | 2009-11-19 | Jds Uniphase Corporation | Photodiode Assembly With Improved Electrostatic Discharge Damage Threshold |
TWM391250U (en) * | 2010-06-22 | 2010-10-21 | Tpv Electronics (Fujian) Co Ltd | Light-emitting diode (LED) control circuit |
DE102014101353B4 (de) * | 2014-02-04 | 2018-01-25 | Phoenix Contact Gmbh & Co. Kg | Weitbereichs-Eingangsschaltung |
FR3032837B1 (fr) * | 2015-02-17 | 2017-02-24 | Commissariat Energie Atomique | Systeme de protection selective d'un reseau electrique et procede de protection associe |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1424455A (fr) * | 1963-11-29 | 1966-01-14 | Texas Instruments Inc | Dispositif de couplage électro-optique |
DE1264513C2 (de) * | 1963-11-29 | 1973-01-25 | Texas Instruments Inc | Bezugspotentialfreier gleichstromdifferenzverstaerker |
US3610938A (en) * | 1969-10-07 | 1971-10-05 | English Electric Co Ltd | Apparatus for monitoring operational parameters of high-voltage valves |
US3758826A (en) * | 1970-10-01 | 1973-09-11 | G Zizola | Photoelectronic safety device |
US3811073A (en) * | 1973-03-05 | 1974-05-14 | Westinghouse Electric Corp | Alternating current sensing circuit and method |
US3925709A (en) * | 1973-08-13 | 1975-12-09 | Westinghouse Electric Corp | Overcurrent protection circuit for AC systems |
US3999087A (en) * | 1975-08-15 | 1976-12-21 | Westinghouse Electric Corporation | Missing phase detection circuit for use with three-phase power sources |
-
1977
- 1977-06-02 US US05/802,930 patent/US4139878A/en not_active Expired - Lifetime
-
1978
- 1978-05-18 CA CA303,605A patent/CA1101065A/en not_active Expired
- 1978-05-19 GB GB20669/78A patent/GB1605055A/en not_active Expired
- 1978-05-29 DE DE19782823444 patent/DE2823444A1/de not_active Withdrawn
- 1978-05-29 FR FR7815967A patent/FR2393452A1/fr not_active Withdrawn
- 1978-06-01 JP JP6502778A patent/JPS541850A/ja active Pending
- 1978-06-01 NL NL7805976A patent/NL7805976A/xx not_active Application Discontinuation
- 1978-06-01 IT IT41588/78A patent/IT1105571B/it active
Also Published As
Publication number | Publication date |
---|---|
DE2823444A1 (de) | 1978-12-14 |
FR2393452A1 (fr) | 1978-12-29 |
GB1605055A (en) | 1981-12-16 |
IT7841588A0 (it) | 1978-06-01 |
CA1101065A (en) | 1981-05-12 |
NL7805976A (nl) | 1978-12-05 |
US4139878A (en) | 1979-02-13 |
JPS541850A (en) | 1979-01-09 |
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