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Class Information
Number: 361/95
Name: Electricity: electrical systems and devices > Safety and protection of systems and devices > With specific current responsive fault sensor > With time delay protective means > With instantaneous override
Description: Subject matter wherein the protective means is activated at a predetermined time after a first level fault is sensed, or immediately after a fault of a higher predetermined level is sensed.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7518838 |
Protection of variable frequency power systems from excessive peak electrical potentials |
Apr. 14, 2009 |
| 7511967 |
Avionics enclosure |
Mar. 31, 2009 |
| 7450362 |
Method and apparatus for disconnection of a fault current which has occurred in an AC power supply system |
Nov. 11, 2008 |
| 6654216 |
Distributed monitoring and protection system for a distributed power network |
Nov. 25, 2003 |
| 6633474 |
Selective electronic tripping element |
Oct. 14, 2003 |
| 5627717 |
Electronic processing unit, and circuit breaker including such a unit |
May. 6, 1997 |
| 5546265 |
Digital circuit interrupter shunt trip control circuit |
Aug. 13, 1996 |
| 5467248 |
Relay control circuit |
Nov. 14, 1995 |
| 5390068 |
Microprocessor based integrated generator set controller apparatus and method |
Feb. 14, 1995 |
| 5241444 |
Adaptive trip fault current indicator |
Aug. 31, 1993 |
| 5224006 |
Electronic circuit breaker with protection against sputtering arc faults and ground faults |
Jun. 29, 1993 |
| 5191501 |
Fast lamp current limiting apparatus and method |
Mar. 2, 1993 |
| 5165107 |
Electronic delay timer and alarm system |
Nov. 17, 1992 |
| 5029039 |
Current adaptive fault indicator |
Jul. 2, 1991 |
| 4962439 |
Squaring circuit |
Oct. 9, 1990 |
| 4956741 |
Solid-state trip unit for DC circuit breakers |
Sep. 11, 1990 |
| 4949214 |
Trip delay override for electrical circuit breakers |
Aug. 14, 1990 |
| 4943888 |
Electronic circuit breaker using digital circuitry having instantaneous trip capability |
Jul. 24, 1990 |
| 4914541 |
Solid-state trip device comprising an instantaneous tripping circuit independent from the supply voltage |
Apr. 3, 1990 |
| 4897756 |
Add-on ground fault module |
Jan. 30, 1990 |
| 4862308 |
Power bus fault detection and protection system |
Aug. 29, 1989 |
| 4825330 |
Ultra-fast solid state power interrupter |
Apr. 25, 1989 |
| 4812943 |
Current fault protection system |
Mar. 14, 1989 |
| 4794485 |
Voltage surge protector |
Dec. 27, 1988 |
| 4722024 |
Device for detecting excess-current in a direct-current generator with controlled rectifier |
Jan. 26, 1988 |
| 4704653 |
Transformer differential relay with speed-up apparatus |
Nov. 3, 1987 |
| 4675598 |
Current measuring device in an electrical distribution switchboard or enclosure |
Jun. 23, 1987 |
| 4652965 |
High level magnetic trip circuit |
Mar. 24, 1987 |
| 4605982 |
Control circuit for a circuit interrupter |
Aug. 12, 1986 |
| 4583004 |
Current monitoring circuit for static switch of uninterruptable power system |
Apr. 15, 1986 |
| 4571659 |
Static overcurrent trip device to operate a circuit breaker in response of fault conditions in an alternating current net system |
Feb. 18, 1986 |
| 4486803 |
Electronic system for high amperage circuit interruption apparatus |
Dec. 4, 1984 |
| 4442472 |
Solid state trip circuit with digital timer |
Apr. 10, 1984 |
| 4404612 |
DC Solid state overload relay |
Sep. 13, 1983 |
| 4255774 |
Static instantaneous overcurrent relay with low transient overreach |
Mar. 10, 1981 |
| 4246622 |
Overload protective device of electric motors |
Jan. 20, 1981 |
| 4208689 |
Circuit breaker having an electronic fault sensing and trip initiating unit |
Jun. 17, 1980 |
| 4149210 |
Electrical apparatus including interlocking circuit for short-time delay and long-time delay tripping |
Apr. 10, 1979 |
| 4110809 |
Solid state power controller with low level signal control |
Aug. 29, 1978 |
| 4007401 |
Current sensitive circuit protection system |
Feb. 8, 1977 |
| 4001648 |
Ground fault detector |
Jan. 4, 1977 |
| 3996499 |
Zener diode effect on long acceleration module |
Dec. 7, 1976 |
| 3978374 |
Method and apparatus for the detection of short circuits |
Aug. 31, 1976 |
| 3956670 |
Circuit interrupter circuit including improved control |
May. 11, 1976 |
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