| Patents for H02H 11 - Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result (2,416) |
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| 09/28/1994 | EP0617499A1 Power supply circuit |
| 09/20/1994 | US5349489 Integrated semiconductor circuit with polarity reversal protection |
| 08/25/1994 | DE4304690C1 Electronic starting safety circuit for the motor drive of an electrical appliance |
| 08/18/1994 | WO1994018737A1 Electric vehicle drive train with contactor protection |
| 08/16/1994 | US5338991 High power solid state relay with input presence and polarity indication |
| 07/13/1994 | CN1089404A Automatic choice apparatus of optimal on or off moment for large power electrical appliance |
| 06/29/1994 | CN1025271C Microprocessor controlled ground system monitor |
| 06/09/1994 | WO1994012998A1 Method and apparatus for staggered activation of electrical loads |
| 06/09/1994 | CA2149624A1 Method and apparatus for staggered activation of electrical loads |
| 05/19/1994 | DE4339016A1 Operating mains supply part which supplies current to electronic control unit - having several electrical users such as electromagnetic actuators or relays or electric motors with their switch on current well above normal operating current |
| 04/26/1994 | US5306990 Electric motor control apparatus including an output stage protected against malfunction and damage |
| 04/06/1994 | CN2161005Y Multifunctional timing electrocontrol box |
| 03/24/1994 | DE4230603C1 Controlling switchgear with protection against faulty switching in switch panels - assigning operating unit to each switchgear item in switching system of electrical power distribution system to identify its condition |
| 03/23/1994 | EP0449807B1 Process for monitoring short-circuits in a voltage circuit inverter |
| 03/16/1994 | EP0587404A2 Electronic motor protection apparatus |
| 03/02/1994 | EP0396695B1 Universal output circuit |
| 02/17/1994 | WO1994003956A1 Reverse-polarity protection by means of a protecting element having a reduced surface |
| 02/17/1994 | WO1994003952A1 Reverse-polarity protection with reduced element surface |
| 02/16/1994 | EP0372050B1 Electrical safety apparatus |
| 02/02/1994 | EP0581078A2 Electrical distribution device with preventive checking of the state of the load, particularly for civil and industrial users |
| 01/26/1994 | EP0580217A1 Electronic switching-on apparatus and a switching-on method |
| 01/15/1994 | CA2099336A1 Electrical distribution device with preventive checking of the state of the load, particularly for civil and industrial users |
| 12/29/1993 | EP0399020B1 Integrated semiconductor circuit with polarity reversal protection |
| 12/29/1993 | CN1080058A Ground detecting method for inverter device |
| 12/21/1993 | US5272313 Arc welder |
| 12/08/1993 | EP0572755A1 Turn-on control circuit for electric devices |
| 11/25/1993 | DE4317110A1 Three= phase inverter output load current detection and shut-down circuit - uses current sense coils and inverter control circuit. |
| 11/10/1993 | CN2146075Y Polarity and undervoltage protector |
| 10/27/1993 | CN2144889Y Preventing earth lead box circuit breaker locking device for power system |
| 09/14/1993 | US5245219 Marine power Y-adapter |
| 09/07/1993 | US5243243 Electric motor insulation resistance fault monitor |
| 08/17/1993 | US5237242 Apparatus for operating a discharge lamp and a lighting unit having the apparatus |
| 07/20/1993 | US5229577 Image forming apparatus utilizing an ac voltage control circuit |
| 06/08/1993 | US5216897 Preventing simultaneous start of air conditioners during recovery from a power failure |
| 06/03/1993 | DE4139378A1 FET protective circuit against faulty polarisation - has diode incorporated between consumer junction point to DC voltage source and FET gate-terminal |
| 05/27/1993 | WO1993010588A1 Reverse-supply protection device for power output stage transistors |
| 05/27/1993 | DE4137489A1 Switching control of electrical energy distribution switch appts. - verifying each received switch command by cross-checking between individual switch fields to prevent switching errors |
| 05/25/1993 | CA1318352C Overload protection circuit for solid state switch |
| 05/19/1993 | EP0542040A2 Trip control device for circuit breaker |
| 05/19/1993 | DE4137452A1 Verpolschutzanordnung fuer leistungsendstufen-feldeffekt-transistoren Verpolschutzanordnung for final-stage power field-effect transistors |
| 03/31/1993 | EP0534250A2 Method and device to protect an AC circuit |
| 03/17/1993 | EP0531995A2 An AC/DC rectifier power source |
| 03/16/1993 | US5195007 Engine-driven power generating system |
| 03/16/1993 | US5194758 Automatic switching circuit |
| 03/09/1993 | CA1314311C Mos ic reverse battery protection |
| 03/03/1993 | CN2127805Y Flush-bonding impulse relay |
| 01/12/1993 | US5179490 Ground-safety controller |
| 01/12/1993 | US5179488 Process control instrument with loop overcurrent circuit |
| 12/23/1992 | CN1019626B Automatic protector of refrigerator |
| 12/22/1992 | US5173587 Electric heating appliance |
| 12/16/1992 | EP0518247A2 Method and device for preventing unauthorized operation of high-voltage apparatusus |
| 11/17/1992 | US5165107 Electronic delay timer and alarm system |
| 11/11/1992 | EP0512605A1 Power device having reverse-voltage protection |
| 10/27/1992 | US5159523 Grounding system and detection circuit for fueling |
| 10/22/1992 | DE3643755C1 Switching fault protection device |
| 10/21/1992 | CN1065560A Distribution equipment for beam-pumping unit |
| 10/14/1992 | CN2119041U Device for preventing close switch with earthed wire |
| 10/08/1992 | DE4110677A1 Current supply circuit for home electronic entertainment appts. e.g. for VTR - has microprocessor receiving all mains connections of separate appts. and switching only one on at any given time |
| 09/29/1992 | US5151841 Electrical safety apparatus |
| 09/29/1992 | US5151767 Power integrated circuit having reverse-voltage protection |
| 09/15/1992 | CA1307575C Cord saver |
| 09/01/1992 | US5144517 Intrinsically safe barrier device |
| 08/26/1992 | CN1063932A Control apparatus for air conditioner |
| 08/25/1992 | US5142433 Motor drive circuit |
| 08/12/1992 | EP0498645A2 A control apparatus for an air conditioner |
| 08/11/1992 | US5138547 Dual input power supply |
| 08/11/1992 | US5138515 Pulse-controlled gate circuit with protection against short-circuit |
| 08/04/1992 | US5136452 Fuse-protected RC speed controller variations |
| 07/22/1992 | EP0495142A1 Protection against inverted polarity and overvoltage for circuit arrangements |
| 06/30/1992 | US5126911 Integrated circuit self-protected against reversal of the supply battery polarity |
| 06/23/1992 | US5124874 Protective device for electric control circuits |
| 06/23/1992 | US5124679 Automatic power breaker and relay and water sensor used in the automatic power breaker |
| 06/03/1992 | EP0487759A1 Reverse battery protection |
| 05/06/1992 | EP0483706A2 Method for blocking and interlocking in connection with the operation of electric switching devices |
| 04/28/1992 | US5109162 Reverse polarity flyback switch |
| 04/21/1992 | US5107387 Fuse-protected RC controller |
| 04/14/1992 | US5105325 Ground-safety controller |
| 03/11/1992 | CN1059425A Programmable safety electrical socket controller |
| 03/05/1992 | WO1992003867A1 Surge suppressor device |
| 02/10/1992 | CA2022992A1 Programmable safety electrical socket controller |
| 02/06/1992 | WO1992002066A1 Process control instrument with loop overcurrent circuit |
| 01/14/1992 | CA1294343C Thermostat with integral means for detecting out-of-phase connection of a two-transformer power source |
| 01/02/1992 | DE4019737A1 DC supply circuit for electronic stage - has diode or transistor rectifier bridge between DC inputs and circuit outputs |
| 12/04/1991 | EP0458783A1 Improvements in or related to circuit breakers used with electrical apparatus |
| 11/28/1991 | DE4031288C1 Incorrect polarity protection CCT - has drain-source connected into minus or positive line between DC source |
| 11/05/1991 | US5062278 Air-conditioning apparatus including an indoor unit and an outdoor unit having its compressor driven by a three-phase AC power supply |
| 10/30/1991 | EP0454597A1 Pulse gate control circuit with short-circuit protection |
| 10/29/1991 | US5061884 Current limiting control circuit for D.C. motors with line dropout protection |
| 10/15/1991 | US5057963 Opposite phase detecting device for alternating current electrical equipment |
| 10/09/1991 | EP0449807A1 Process for monitoring short-circuits in a voltage circuit inverter. |
| 10/09/1991 | CN1055270A Microprocessor controlled ground system monitor |
| 10/01/1991 | US5053914 Safety circuit for a high-voltage generator of an electrostatic filter |
| 09/19/1991 | DE4107431A1 Safety circuit for electrical device with electronic control - uses voltage limiting circuit and counter providing voltage protection for electronic control |
| 07/30/1991 | US5035547 Magnet base drill unit |
| 07/17/1991 | EP0436778A2 Circuit for the protection of a consumer |
| 07/04/1991 | DE3942601A1 Checking admissibility of coupling 2 power sub-networks in parallel - constructing difference for each sub-network between measured and reference voltages |
| 07/03/1991 | CN1052752A Safety intelligence socket |
| 07/02/1991 | US5029037 Safe mains voltage supply outlet and method |
| 06/13/1991 | DE4001377C1 Measuring arrangement testing protective layers - applying test rod and earth cable to detect fault spots and pores w.r.t. conductive substrate |
| 06/12/1991 | CN2078945U Single-phase a.c power source input means |