| Patents for H02H 7 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions (32,726) |
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| 12/08/1993 | EP0573333A1 Method for the selective protection of the mains against earth faults |
| 12/08/1993 | EP0572805A2 Monitoring of crawing speed for actuations in printing machines |
| 12/08/1993 | EP0572767A2 Monitoring diagnostic apparatus using neural network |
| 12/08/1993 | EP0572755A1 Turn-on control circuit for electric devices |
| 12/08/1993 | EP0572706A1 Control circuit for a power-FET with a load connected to its source |
| 12/08/1993 | CN2149047Y Electricity-saving compensation and phase failure protector for motor |
| 12/08/1993 | CN2149046Y Phase failure protector for motor |
| 12/08/1993 | CN2149045Y Protecting apparatus for electric motor |
| 12/08/1993 | CN2149042Y Triphase source negative-phase sequence automatic regulator |
| 12/08/1993 | CN1023048C Phase cut-off protector of phase and width discrimination |
| 12/07/1993 | US5268623 D.c. motor with a current-limiting arrangement |
| 12/01/1993 | EP0571657A2 Inverter apparatus and inverter controlling method having fault protection |
| 12/01/1993 | EP0571645A1 Method and device for a recognition of defects in a control system for a controlled series compensator |
| 12/01/1993 | EP0571644A1 Method and device for unloading a series capacitor of a controlled series compensator according to the load of its protection shunt |
| 12/01/1993 | EP0571383A1 Battery protection system. |
| 12/01/1993 | CN2148438Y Stepless power regulating economizer for three phase ac motor |
| 12/01/1993 | CN2148436Y Electric controlling device specially adapted to oil field beam-pumping unit |
| 12/01/1993 | CN2148423Y Three phase controlled ac contactor |
| 12/01/1993 | CN2148422Y Electronic loss-of-phase protector for three phase motor |
| 12/01/1993 | CN2148421Y Full protector for motor |
| 12/01/1993 | CN2148420Y Universal electronic protector for three phase asynchronous motor |
| 11/30/1993 | US5267231 Digital communication channel interface |
| 11/25/1993 | WO1993023904A1 Process for monitoring an electric motor for thermal overloading |
| 11/25/1993 | DE4317110A1 Three= phase inverter output load current detection and shut-down circuit - uses current sense coils and inverter control circuit. |
| 11/24/1993 | CN2147674Y Wire distribution section protection and grounding display device |
| 11/24/1993 | CN2147673Y Flow-distributing thunder-elimilator hook releasing device and current leakage watching instrument |
| 11/24/1993 | CN2147672Y Full-function protector for refrigeration compressor |
| 11/24/1993 | CN2147671Y Overload protector for motor phase losing |
| 11/24/1993 | CN2147670Y Multi-function three-phase ac motor protector |
| 11/24/1993 | CN2147669Y Asychronous motor protector |
| 11/24/1993 | CN2147668Y Three-phase motor monitoring protector |
| 11/24/1993 | CN2147667Y Electric motor protector |
| 11/24/1993 | CN1078830A Charge control apparatus and electronic apparatus provided with such a control apparatus |
| 11/23/1993 | US5265002 Fault protection for a multiphase bridge power converter |
| 11/23/1993 | US5264778 Apparatus protecting a synchronous machine from under excitation |
| 11/21/1993 | CA2096491A1 Method and apparatus for recognizing defects in a triggering system of a controlled series compensator |
| 11/21/1993 | CA2096487A1 Method and apparatus for relieving a capacitor of a controlled series compensator as a function of the load on its arrester |
| 11/18/1993 | DE4216040A1 Verfahren zur Überwachung eines Elektromotors auf thermische Überlastung Method for monitoring thermal overload of an electric motor on |
| 11/17/1993 | CN2146803Y Protective device for electric machines |
| 11/17/1993 | CN2146800Y Circuit protector for irrigation in the countryside |
| 11/16/1993 | US5262704 Protection circuit in inverter for refrigerators |
| 11/11/1993 | WO1993022716A1 A compressor control circuit |
| 11/11/1993 | DE4214998A1 Door drive, esp. for opening and closing garage doors - has required force comparison arrangement for triggering safety cut=out |
| 11/10/1993 | CN2146073Y Phase loss, overcurrent and overload protector for electric motor |
| 11/10/1993 | CN1078302A Method and apparatus for detection of current in air conditioner |
| 11/09/1993 | US5260607 Snubber circuit for power converter |
| 11/05/1993 | CA2087053A1 Power cross protection of the tip/ring interface to customer premise equipment |
| 11/03/1993 | EP0568421A1 Protection device of an integrated circuit against electrostatic discharges |
| 11/03/1993 | EP0567904A1 Parameter monitoring equipment for electrical power transformer center |
| 11/03/1993 | CN2145471Y Whole-function protector |
| 11/03/1993 | CN2145470Y Multifunction motor protector |
| 10/27/1993 | CN2144886Y Phase-failure overload protector for electric motor |
| 10/27/1993 | CN2144885Y Universal phase-failure protector for explosion-proof three-phase motor |
| 10/27/1993 | CN2144884Y Protector for AC electric machine |
| 10/27/1993 | CN2144883Y Fault memory protector for intelligent motor |
| 10/27/1993 | CN1077822A Overvoltage protector for input circuit of electronic apparatus |
| 10/26/1993 | US5257174 Engine-driven power generating system with over-current protection and stator teeth with grooves on a top surface |
| 10/26/1993 | CA1323682C Negative and zero sequence directional overcurrent unit for ac power transmission line protection |
| 10/20/1993 | EP0566297A1 Brushless motor control system |
| 10/20/1993 | EP0565656A1 Ac/dc converter fault detector |
| 10/20/1993 | CN2144363Y Motor protection contactor |
| 10/20/1993 | CN2144362Y Integrated protector for ac motor |
| 10/20/1993 | CN2144361Y Negative logic single-chip integrated motor protector |
| 10/19/1993 | CA1323398C Method and apparatus for providing thermal protection for large motors based on accurate calculations of slip dependent rotor resistance |
| 10/14/1993 | WO1993020608A1 Thermal protection for locomotive main traction alternators |
| 10/14/1993 | DE4312084A1 HV power supply with voltage peak limiting network - coacts with two input lines, with capacitor coupled to one input line, and line between resistor and diode |
| 10/14/1993 | DE4310323A1 Overcurrent protection appts. for power device, esp. IGBT - interrupts current supply when current magnitude is detected for time period which is not shorter than permitted period |
| 10/14/1993 | CA2109521A1 Thermal protection for locomotive main traction alternators |
| 10/13/1993 | CN2143840Y Phase-bias phase-loss protective device for light stream motor |
| 10/13/1993 | CN1077315A Automatic switch of transformer |
| 10/13/1993 | CN1022447C Multi-functional monitoring and controlling protector for three-phase motor |
| 10/12/1993 | US5253180 Apparatus and method for diagnosis of power appliances |
| 10/12/1993 | US5252411 Protective apparatus for secondary battery |
| 10/06/1993 | EP0564417A1 Charge control apparatus and electronic apparatus provided with such a control apparatus |
| 10/06/1993 | EP0564095A2 Method of detecting load current and load current detector |
| 10/06/1993 | EP0563192A1 Monitoring apparatus. |
| 10/06/1993 | CN2143382Y Remote controlled electric motor prolector |
| 10/05/1993 | CA1322778C Monitoring system |
| 10/04/1993 | CA2084466A1 Method of detecting load current |
| 09/29/1993 | EP0561900A1 Circuit protection device |
| 09/29/1993 | CN2143028Y Electronic program control electricity-saving protector for AC electric motor |
| 09/29/1993 | CN2143019Y Phase-loss protecting AC contactor |
| 09/29/1993 | CN2143018Y Protecting device for electric motor |
| 09/29/1993 | CN1022274C Automatic protecting motor switch against overvoltage, undervotage, phase failure and overload |
| 09/23/1993 | DE4209214A1 Limiter e.g. for voltage peaks caused by stray inductances - has useful signal rectifying diode with shunt contg. storage capacitor |
| 09/23/1993 | DE4209167A1 Switching and monitoring circuit for ind. electrical drive - uses semiconductor power switches to provide all switching and monitoring functions allowing electrical programming of drive regulation. |
| 09/22/1993 | EP0560973A1 Communication interface for bus connected circuit breakers |
| 09/22/1993 | CN2142615Y Phase break and overload protector of three-phase AC motor |
| 09/22/1993 | CN2142614Y Passive bistable motor protector |
| 09/21/1993 | US5247273 Surge absorber for protection of communication equipment connected to communication lines |
| 09/21/1993 | US5247237 Control device of induction motor |
| 09/15/1993 | CN2142238Y Cadmium-nickel accumulator power supply with closing circuit without maintenance |
| 09/15/1993 | CN2142236Y Electricity-economizing device of battery case |
| 09/15/1993 | CN2142235Y High and low voltage phase interruption protector for electric motor |
| 09/15/1993 | CN2142234Y Secondary opening circuit overvoltage protection for current transformer |
| 09/14/1993 | US5245526 Below ground current sensing with current input to control threshold |
| 09/14/1993 | US5245523 Power delivery circuit with current detection |
| 09/14/1993 | US5245500 270 Volt DC system with transient suppressor |
| 09/14/1993 | US5245498 Downed conductor automatic detecting device |
| 09/14/1993 | US5245496 Self-programming non-invasive motor overload prevention system |