| Patents for H02H 3 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection (33,031) |
|---|
| 06/01/1988 | EP0268930A1 Circuit arrangement with a self-protecting power switch |
| 06/01/1988 | CN87211307U All-function leakage relay with indicator light |
| 06/01/1988 | CN85204859U Multifunction line protector |
| 05/31/1988 | CA1237475A1 Monitoring system for the trigger circuit of an electrical power switch |
| 05/31/1988 | CA1237474A1 Root mean square measuring device for negative sequence current |
| 05/25/1988 | EP0268107A1 Home protection device against gas explosions |
| 05/25/1988 | CN87201394U Settled load, over-voltage, electric leaking switch |
| 05/18/1988 | EP0267500A1 Method and device for the location of an earth fault in a conductor in a three-phase electrical power system |
| 05/18/1988 | EP0267211A1 Protection system for electrically-operated devices |
| 05/17/1988 | US4745512 Remote protection of three phase distribution transformers |
| 05/17/1988 | CA1236909A1 Circuit breaker with solid-state trip unit with a digital processing system shunted by an analog processing system |
| 05/11/1988 | EP0266883A1 Detection of unsafe voltages on mobile equipment |
| 05/11/1988 | CN87200492U Automatic man-apparatus preventer for domestic electric-appliance |
| 05/11/1988 | CN86210840U Automatic interrupter for large power load limiting |
| 05/11/1988 | CN86203365U Leakage preventer |
| 05/10/1988 | US4743998 Grounding system |
| 05/05/1988 | WO1988003336A1 Circuit breaker trip solenoid assembly |
| 05/05/1988 | DE3635863A1 Circuit arrangement for monitoring a motor parameter |
| 05/04/1988 | EP0266046A1 Remote protection of three phase distribution transformers |
| 05/04/1988 | CN87208588U Multifunctional automatical shut-down device with power-factor compensation function |
| 05/04/1988 | CN87208023U Electronic power-saving and current-limiting device |
| 05/04/1988 | CN87204623U Electrical leakage protector with current limiting function |
| 05/04/1988 | CN87203013U Socket style protector for refrigerator |
| 05/04/1988 | CN86106756A Synthetic power-frequency variable-quantity directional-relay |
| 05/03/1988 | US4742424 Power status monitor for electronic system |
| 05/03/1988 | US4742422 Self-monitoring fault current safety switch |
| 04/27/1988 | CN87208087U Self-controlling current limiter |
| 04/27/1988 | CN87207394U Leakage-curreut acting protector |
| 04/27/1988 | CN87207356U Automatic reset v-c limit switch |
| 04/27/1988 | CN87203282U Multifuction electronic switch |
| 04/26/1988 | US4741002 RMS calculation circuit |
| 04/26/1988 | US4740883 Universal solid state power controller |
| 04/26/1988 | US4740860 Method for generating a tripping signal as a function of the magnitude and duration of an overcurrent |
| 04/26/1988 | US4740859 Transient voltage surge suppressor and line short monitor |
| 04/26/1988 | CA1235742A2 Overvoltage protection circuit for a power supply |
| 04/21/1988 | DE3634802A1 Arrangement for selective detection of a short to earth in the rotor circuit of an electric machine |
| 04/21/1988 | DE3634731A1 Method for limiting or interrupting the current of a drive device on reaching or exceeding an upper limiting current value, and a protection circuit for carrying out the method |
| 04/20/1988 | EP0264314A1 Multipole differential circuit breaker with a modular assembly |
| 04/20/1988 | EP0264313A1 Electric differential-protection apparatus with a test circuit |
| 04/20/1988 | CN87207269U Miniature electric shock protector |
| 04/20/1988 | CN87206500U Electronic current-limiting switch |
| 04/20/1988 | CN87205715U Five-function low-voltage contactor |
| 04/20/1988 | CN87202451U Electromagnetic safety switch |
| 04/20/1988 | CN86209954U Automatic repositioner of electric shock protective device |
| 04/19/1988 | US4739436 Surge suppression circuit |
| 04/19/1988 | US4739275 DC ground fault detection |
| 04/19/1988 | US4739274 DC ground fault detection |
| 04/13/1988 | CN87203635U Multi-function over voltage protector of house electrical equipment |
| 04/13/1988 | CN87202097U Safety apparatus for not power cut and using power |
| 04/13/1988 | CN87106499A Multipolar earthing leakage switch comprised of standard fittings |
| 04/13/1988 | CN86209974U Protector for leakage of electricity in electrical equipment |
| 04/13/1988 | CN86208741U Surplus electric current protector for abolishing special purpose mutual inductor |
| 04/13/1988 | CN86207913U Electric learage switch of dynamic state and automatic |
| 04/12/1988 | US4737879 Redundant digital distance relay |
| 04/06/1988 | CN87204010U Multifunctional speedy fault circuit breaker |
| 04/05/1988 | US4736267 Fault detection circuit |
| 04/05/1988 | US4736265 Ground fault current interrputer circuit |
| 04/05/1988 | US4736145 Electric control apparatus for equipment |
| 04/05/1988 | US4736144 Automatic door being controlled with a servo-controlled safety protection device |
| 03/31/1988 | DE3632178A1 Method and device for the quick detection of power system faults |
| 03/30/1988 | CN87204805U Overvoltage-leakoge actuated switch |
| 03/24/1988 | DE3631177A1 Device for protection against overvoltages in electrical equipment |
| 03/24/1988 | DE3631167A1 Method for producing a trip signal as a function of the magnitude and duration of an overcurrent |
| 03/23/1988 | CN87210506U Multi-functional anti-thief electric device |
| 03/23/1988 | CN87203202U Electrical leakage protector |
| 03/23/1988 | CN87202471U Multi-purpose safety socket |
| 03/22/1988 | US4733322 AC-DC transfer standard overload protection circuit |
| 03/22/1988 | US4733321 Solid-state instantaneous trip device for a current limiting circuit breaker |
| 03/22/1988 | US4733319 High-speed current limiting circuit breaker |
| 03/22/1988 | US4732956 Styryloxy resins and compositions thereof |
| 03/16/1988 | EP0260120A2 Control circuit with coordination provisions |
| 03/16/1988 | CN86204109U Full automatic controller for preventing electricity-stealing |
| 03/15/1988 | US4731692 Circuit breaker trip solenoid assembly |
| 03/15/1988 | US4731691 Safety circuit for detecting asymmetry in thyristor load currents |
| 03/15/1988 | US4731689 Directional detection in connection with faults in a power supply network |
| 03/15/1988 | US4731688 Range limitation for a protection device in a power supply network |
| 03/15/1988 | US4731549 Current sensor and control device |
| 03/08/1988 | US4730245 Power cut detection apparatus for power converter |
| 03/02/1988 | EP0258198A2 Electrical safety device |
| 03/02/1988 | EP0258091A1 Static digital selfmonitoring tripping device |
| 03/02/1988 | EP0258090A1 Static tripping device for a circuit breaker with electronic contact wear indication |
| 03/02/1988 | CN87205033U Multi-functional preventer for electricleakage |
| 03/02/1988 | CN87203578U Electronic preventer for electricleakage |
| 03/02/1988 | CN86201128U Isolation-bursting and leakage-detecting relay for mine |
| 03/01/1988 | US4729052 Supervisory system for impedance-earthed power systems |
| 03/01/1988 | US4728948 Remote monitor and control system |
| 03/01/1988 | CA1233583A1 Protection arrangement for a telephone subscriber line interface circuit |
| 02/25/1988 | DE3627479A1 Device for differential protection of power cables |
| 02/24/1988 | EP0256341A1 Fast short-circuit detector device |
| 02/24/1988 | CN87204009U Phase interruption currnet-limiting protector |
| 02/23/1988 | US4727448 Shutdown control circuit for an electric power supply |
| 02/23/1988 | CA1233230A1 Digital i.sup.2t pickup, time bands and timing control circuits for static trip circuit breakers |
| 02/23/1988 | CA1233229A1 Circuit breaker and protective relay unit |
| 02/23/1988 | CA1233228A1 Method for determining the time of reclosing a circuit breaker and device for carrying out this method |
| 02/18/1988 | DE3627006A1 Schaltungsanordnung zur ansteuerung eines elektrischen verbrauchers Circuit arrangement for driving an electrical load |
| 02/17/1988 | CN87105402A Solid-state trip unit of electrical circuit breaker with contact wear indicator |
| 02/17/1988 | CN87105399A Trip releaser with numerical solid state circuit auto-surveillance |
| 02/16/1988 | US4725916 Short-circuit protective circuit for uninterruptible power supply equipment |
| 02/16/1988 | US4725913 Residual current detector |
| 02/16/1988 | US4725769 Current limited for constant current for switching driving devices |