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Class Information
Number: 361/77
Name: Electricity: electrical systems and devices > Safety and protection of systems and devices > Reverse phase responsive
Description: Subject matter relating to systems responsive to a 180° change of phase and also systems responsive to an improper phase sequence.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7414820 |
Protective apparatus |
Aug. 19, 2008 |
| 7411768 |
Low-loss rectifier with shoot-through current protection |
Aug. 12, 2008 |
| 7242563 |
Reverse phase control power switching circuit with overload protection |
Jul. 10, 2007 |
| 7196886 |
Reverse wiring detect in circuit interrupting devices |
Mar. 27, 2007 |
| 6720749 |
Three-phase motor protector apparatus |
Apr. 13, 2004 |
| 6654217 |
Quick responding instantaneous trip system |
Nov. 25, 2003 |
| 6573726 |
Sensitive ground fault detection system for use in compensated electric power distribution networks |
Jun. 3, 2003 |
| 6147616 |
Automatic power interruption and re-supply relay for an electric power line |
Nov. 14, 2000 |
| 5859530 |
Process for determining the phase sequence in a three-phase network (rotary current network) |
Jan. 12, 1999 |
| 5796565 |
Apparatus and method for starting and protecting a three-phase motor |
Aug. 18, 1998 |
| 5764465 |
Electronic circuit arrangement having polarity reversal protection |
Jun. 9, 1998 |
| 5519557 |
Power supply polarity reversal protection circuit |
May. 21, 1996 |
| 5349489 |
Integrated semiconductor circuit with polarity reversal protection |
Sep. 20, 1994 |
| 5337208 |
In-line AC current limiter |
Aug. 9, 1994 |
| 5267117 |
Electrical phase and amplitude fault detection and response system |
Nov. 30, 1993 |
| 5184063 |
Three phase reversal detection system |
Feb. 2, 1993 |
| 5057963 |
Opposite phase detecting device for alternating current electrical equipment |
Oct. 15, 1991 |
| 5047915 |
Unrestricted frequency converter for unbalanced loads |
Sep. 10, 1991 |
| 4922368 |
Method and apparatus for detecting and discriminating faults in transmission circuits |
May. 1, 1990 |
| 4910628 |
Terminal unit in information transmission system |
Mar. 20, 1990 |
| 4876624 |
Apparatus for detecting unsymmetrical bipolar waveforms |
Oct. 24, 1989 |
| 4833460 |
Phasing indicator |
May. 23, 1989 |
| 4724503 |
Phase unbalance detector |
Feb. 9, 1988 |
| 4698718 |
Electronic reverse power relay |
Oct. 6, 1987 |
| 4674002 |
Directional comparison blocking system |
Jun. 16, 1987 |
| 4667264 |
Apparatus for controlling the starting of a three phase load with its normal phase sequence |
May. 19, 1987 |
| 4663579 |
Interconnecting circuit for connecting one d.c. voltage source to another |
May. 5, 1987 |
| 4659974 |
Controlling electrical phase connections to a three-phase device |
Apr. 21, 1987 |
| 4647838 |
Phase controller |
Mar. 3, 1987 |
| 4618807 |
Reversing contactor for a three-phase motor |
Oct. 21, 1986 |
| 4600962 |
Apparatus for monitoring and protecting a device against a plurality of fault conditions |
Jul. 15, 1986 |
| 4532569 |
Method and apparatus for detecting improper polarity in a power distribution system |
Jul. 30, 1985 |
| 4520419 |
Polarity and overload protective circuit for electric consumers |
May. 28, 1985 |
| 4492878 |
Electrical line reversal and protection system |
Jan. 8, 1985 |
| 4480283 |
Procedure and means for monitoring the phase sequence in a three-phase network |
Oct. 30, 1984 |
| 4471400 |
Protection of appliances against reversal of battery polarity |
Sep. 11, 1984 |
| 4463402 |
Safety jumper cable apparatus |
Jul. 31, 1984 |
| 4447844 |
Electrical safety switch for electrical appliances |
May. 8, 1984 |
| 4423456 |
Battery reversal protection |
Dec. 27, 1983 |
| 4420786 |
Polarity guard circuit |
Dec. 13, 1983 |
| 4412266 |
AC Electrical device protective thermal relay |
Oct. 25, 1983 |
| 4393487 |
Stylus cartridge |
Jul. 12, 1983 |
| 4357644 |
Ratio ground relays |
Nov. 2, 1982 |
| 4347542 |
Ratio ground relay |
Aug. 31, 1982 |
| 4342062 |
Sequence network circuits for protective relaying applications |
Jul. 27, 1982 |
| 4333119 |
Power monitor system |
Jun. 1, 1982 |
| 4284939 |
Device for detecting opposite phase and open phase |
Aug. 18, 1981 |
| 4196378 |
Circuit for detecting a positive phase or an opposite phase in three phase alternating power source |
Apr. 1, 1980 |
| 4171512 |
Circuit for preventing breakdown of a load resulting from wrong connection of a power source |
Oct. 16, 1979 |
| 4163270 |
Safety apparatus for use with a three-phase AC motor |
Jul. 31, 1979 |
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