Patents
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)
09/1992
09/24/1992DE4109586A1 Industrial insulation monitor for unearthed AC low voltage mains - has DC mains voltage with single pole DC voltage source connected in series to coupling resistance arranged between AC voltage mains and earth
09/24/1992DE4100646A1 Identifying power fluctuations in mains supply - preventing undesired release of remote protective circuit breakers from transient deviations by generating blocking signal from measured impedance values
09/23/1992CN2116982U Multifunctional protector
09/23/1992CN2116981U Electronic leakage current protective switch against interference
09/23/1992CN2116980U Electronic protective apparatus with four potentials
09/23/1992CN2116979U Shutoff protector for light circuit
09/23/1992CN2116978U Automatic trigger of security electric source for telecommunication
09/22/1992CA1307822C Floating negative automatic grounding switch
09/17/1992WO1992015956A1 Line disturbance monitor and recorder system
09/17/1992DE4206889A1 Voltage monitoring circuit for alternating voltage - converts input signal to DC voltage with superimposed AC voltage and passes it via Schmitt trigger switching between permitted minimum and maximum voltages
09/17/1992DE4108049A1 Overcurrent protection device for AC or DC network - with ohmic current monitoring and semiconductor current interrupter activated when max. current is exceeded
09/16/1992CN2116318U Fire-proof temp. regulating switch for electrothermal blanket
09/16/1992CN2116297U Telecontrol magnetic starter
09/16/1992CN2116296U Multifunctional electrical appliance protector
09/16/1992CN2116295U Device for proofing fraudulent use of electricity
09/16/1992CN2116294U Energy-saving automatic phase-lose protector
09/16/1992CN2116293U Full automatic electronic energy-saving protector for refrigerator
09/16/1992CN2116292U Shockproof protector
09/16/1992CN2116291U Multifunctional monitor for electricity applying
09/16/1992CN2116287U Shockproof safety socket
09/16/1992CN2116276U Circuit breaker with time controlling and load limiting
09/16/1992CN1064571A Earth-leakage circuit breaker
09/12/1992CA2061957A1 Digital circuit interrupter with an improved sampling algorithm
09/10/1992DE4106690A1 Load control system using insulated-gate bipolar transistor circuit - with overload and short-circuit protection of controlled load
09/09/1992EP0502393A2 Ground fault circuit interrupter
09/09/1992CN2115597U Safety box of electric power supply
09/09/1992CN2115596U Break off self-locking protector for dwelling house
09/08/1992US5146397 Power supply device with unbalance monitoring circuit
09/08/1992US5146386 Electronic monitoring and redundant control circuit for a power switch
09/03/1992DE4206072A1 Fuse rupture indication circuit - has isolated signal coupler between fuse circuit and output stage providing blown condition signal
09/02/1992EP0500997A1 Switchgear influencing device
09/02/1992CN2114912U Automatic switch with multi-protective function
09/02/1992CN2114911U Multi-function protector
09/02/1992CN2114910U Electric motor and appliance automatic protector
09/02/1992CN1018123B Automatic ground fault protection for electric power system
09/01/1992US5144519 Electrostatic protection circuit for semiconductor chip
09/01/1992US5144517 Intrinsically safe barrier device
09/01/1992US5144392 Thin-film transistor circuit
09/01/1992US5144152 Rectifier cabinet static breaker
08/1992
08/26/1992CN2114228U Leakage protector avoiding fraudulent use of electricity for single-phase watt-hour meters
08/26/1992CN1063942A Low impedance, high voltage protection circuit
08/25/1992US5142646 Ground fault electrical panel
08/25/1992US5142428 Water sensing type power breaker circuit
08/25/1992US5142165 Power off/on delay circuit to prevent lockout
08/19/1992CN1063780A Multi-purpose solid phase-cut off relay
08/18/1992US5140492 Distance relay using a polarizing voltage
08/18/1992US5140394 Electrothermal sensor apparatus
08/13/1992DE4128961C1 Detecting short circuit to earth in pulse inverter - using square wave HF voltage source in evaluation circuit to operate protection circuit when toroidal transformer saturates
08/12/1992CN2112827U Electricity fraudulent use proof controller for electricity meter
08/12/1992CN1017829B Method and apparatus for determining deterioration of electric power line
08/11/1992US5138547 Dual input power supply
08/11/1992US5138516 Fault sensing and driving system for output driver device
08/11/1992US5138513 Arc preventing electrostatic power supply
08/09/1992WO1992014291A1 Protection device for electrical equipment, machines and installations
08/09/1992CA2080133A1 Protection device for electrical equipment, machines and installations
08/06/1992WO1992013379A2 Electronic equipment for security, electric protection and optimalization of electric power connexion
08/06/1992WO1992013277A1 Current transformer
08/05/1992EP0497478A2 Low impedance, high voltage protection circuit
08/05/1992EP0496997A2 Power receiving system
08/05/1992CN2112219U Multifunctional power line protecting switch
08/04/1992US5136459 High speed current limiting system responsive to symmetrical & asymmetrical currents
08/04/1992US5136458 Microcomputer based electronic trip system for circuit breakers
08/04/1992US5136457 Processor controlled circuit breaker trip system having an intelligent rating plug
08/04/1992US5136456 Faulted current indicator with protection against temporary overloads and transients
08/04/1992US5136453 Method and means for suppressing geomagnetically induced currents
08/04/1992CA1306008C Current sensing
07/1992
07/29/1992CN2111580U Three-phase alternating current phase-lacking protector
07/28/1992US5134362 Apparatus for detecting failure in power system
07/22/1992EP0495771A2 Fault-current protective switch
07/22/1992EP0495302A2 Integrated circuit with analog and digital portions and including thermal modeling
07/22/1992EP0495142A1 Protection against inverted polarity and overvoltage for circuit arrangements
07/22/1992CN2110938U Electricity leakage protector for preventing fraudulent use of electricity through electric meter
07/22/1992CN1017580B Vector difference type electric shock protector
07/21/1992US5132867 Method and apparatus for transfer bus protection of plural feeder lines
07/15/1992CN2110309U Multifunction electric-saving safety apparatus
07/15/1992CN2110308U Three-phase open-phase protector
07/15/1992CN2110307U Automatic protector for automobile electronic equipment
07/15/1992CN2110306U Remote control household appliances auto-close machine
07/15/1992CN2110305U Hall magnetic induction electroic circuit breaker
07/15/1992CN2110231U Multifunction anti-theft watt-hour meter
07/15/1992CN1062814A Multi-functional monitoring and controlling protector for three-phase motor
07/14/1992CA1305245C Circuit interrupter apparatus with an integral trip curve display
07/14/1992CA1305244C Circuit interrupter apparatus with a style saving rating plug
07/09/1992DE4142838A1 Safety device for throughflow electric water heater - cuts off AC supply to controlled switch when diminished flow of water threatens damage to element
07/08/1992WO1992012561A1 Overcurrent protection device
07/08/1992CN2109651U Second generation capacity type high sensitve electric phase-lose protector
07/08/1992CN2109650U Multifunctional domestic electric appliance protector
07/08/1992CA2098916A1 Overcurrent protection device
07/02/1992DE4040847A1 Transferring or delivering roller - comprises shaft, concentrically running tube and 2 disengageable inwardly projecting bearing parts at roller end to allow driven or free rotation AB DE4040844A The end-driven carrying- or delivering roll (10) has a shaft (12), a tube (14) running concentrically to the shaft (12) is new. Two inwardly projecting, oppposed bearing parts are positioned in the space between the shaft (12) and the tube at the ends. The bearing parts are removable from the pipe and are mutually interchangeable. The inner surface (14c) of the tube (14) and the fist bearing part (18) is (in)directly frictionally- or pref. form-connected in the mounting position on the first tube end (14a). The other tube end (14b) is freely rotatable with and/or against the tube. The second bearing part is configured so that it is freely rotatable with the tube in the mounting positions at both tube ends. Tube-shaped bushings (22, 24) at both tube ends, extend into the tube and receive the bearing parts (18, 20). The bushings are fitted to be torsionally resistant against the corresp. inner surface of the tube (14). The corresponding sections of the fist and second bearing part, the tube, bearing parts or the bushings (22, 24) are made of plastic. The roller is pref. made of a polyamide ABS, or metal. USE/ADVANTAGE - The roller is used for transferring or delivering goods when the bearing parts are engaged or disengaged to freely rotate. The conversion from the driven to freely rotating states is simple. AN 92226853 TI Monitoring electronically-commutated DC motor - measuring speed or current and then repeatedly switching off and on if abnormal running detected
07/02/1992DE4040359A1 LV circuit short-circuit protection - uses triac in parallel with load, triggered by output from current transformer and relay switches
07/01/1992EP0493272A1 Circuit breaker containing an interface card with a trip device
07/01/1992EP0493238A1 Short circuit protection circuit for electronic switch
07/01/1992CN2109050U Electronic ballast with starting-stop protection device for lamp
07/01/1992CN2109009U Multifunctional device for avoiding fraudulent using electricity
07/01/1992CN2109008U Loss of phase protector for three-phase electric appliance
07/01/1992CN2109007U Multifunctional protector for electormechanical equipment
07/01/1992CN2109006U Protector for domestic washing machine
07/01/1992CN2109003U Multi-ground wire centralized control self-locking safety electricity saving switch
07/01/1992CN1062435A 电路保护装置 Circuit protection devices
06/1992
06/30/1992US5126678 A.C. Generator fault detector