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Matches 451 - 500 out of 4,779

Document Document Title
WO/2000/031852A1
Surge suppressor apparatus comprising AC power line overvoltage protection, telephone voice line overvoltage and overcurrent protection, high speed data line overvoltage and overcurrent protection and coaxial transmission line overvoltag...  
WO/2000/024105A1
The present invention provides a circuit protection device for protecting an electrical load (20). The device comprises a three-terminal switch-element (10) having first, second and third terminals, the first terminal for series connecti...  
WO/2000/024126A1
The present invention provides a circuit protection device that has a reduced size and weight and is particularly suitable for use, for example, in portable electronic devices and high density electronic circuits. According to one embodi...  
WO/2000/019773A1
A soft heating element (1) utilizing individually insulated electrically conductive carbon (6) or metal containing threads/fibers of metal wires that are woven together with nonconductive threads, into sheets, sleeves or strips. The indi...  
WO/2000/016459A1
A fault-current protection device (1) comprising an overload release circuit (4) that is functionally independent of line voltage and contains a summation current transformer (2), in addition to an overload protection device (18) arrange...  
WO/2000/014842A1
A control system for bathers with ground continuity and ground fault detection includes an electronic controller which controls operation of electrically powered devices such as an electric heater assembly connected in a water flow path ...  
WO/2000/014456A1
A control system for bathers includes an electronic controller which controls operation of an electric heater assembly connected in a water flow path for heating water. The heater assembly includes a heater housing and electric heater el...  
WO/2000/011758A1
The present invention relates to an explosion-proof plug-in connector (1) comprising two tabs (2, 3) which enable a current to flow from a power supply to a user when they are plugged in. A switching device (4) is provided between one co...  
WO/2000/011696A1
Resettable circuit interrupting devices (10) having a reset lockout and an optional independent trip mechanism (50, 52, 54) are provided. The reset lockout prevents the resetting of the circuit breaker if the fault protection is non-oper...  
WO/2000/008733A1
The present invention provides a simple, low cost power line protection device and method suitable for protecting data bus and power lines such as in the USB (Universal Serial Bus) configurations and other power management circuits. In o...  
WO/1999/067861A1
A temperature sensitive circuit interrupting arrangement includes a temperature controlled relay (12a) that will open to disconnect a load (22), such as a common household appliance or utensil, from a power source (20) when the amount of...  
WO/1999/063637A1
An electrical safety device comprises a sensor strip (1208) disposed in the insulation (1205) of a wire or in the insulation of a sheath enclosing a bundle (1203) of insulated electrical conductors. The sensor strip comprises a distribut...  
WO/1999/060628A1
The invention relates to a power mos transistor with a PMT chip located in a transistor housing. The temperature of the transistor barrier junction is monitored. The aim of the invention is to protect the PMT chip from overloading and po...  
WO/1999/057742A1
A circuit protection apparatus includes a circuit breaker coupled in series with a circuit to be protected. The circuit breaker has a trip input and is responsive to a trip signal at the trip input for changing from a closed circuit cond...  
WO/1999/053587A1
A leakage current interrupter (Fig. 23) comprising a trip mechanism (178) that operates automatically in response to the presence of a shock hazard condition. Actuation of the trip mechanism (178) automatically interrupts the flow of cur...  
WO/1999/048183A1
The invention concerns a direct current electric engine comprising a connecting plate (3) and a card (4) bearing an electronic unit controlling said engine, said card (4) including current monitoring means (13) for detecting when said en...  
WO/1999/033155A1
The invention concerns a method for protection of an electrical installation against series fault. The method comprises detection of heat development at specific points in the installation by means of individual sensor/switch units conne...  
WO/1999/030400A1
A fault sensing electrical wire (411) utilizes one or more sensor strips (407) which provide an impedance change when the wire is subject to an overtemperature condition or mechanical damage of the wire. A control unit (402) measures the...  
WO/1999/022249A1
The invention relates to a method and a measuring unit for verifying the presence of a proper neutral conductor connection between a four wire system and a measuring unit, especially an electricity consumption meter, in a four wire syste...  
WO/1999/019895A1
A circuit arrangement for triggering a safety fuse and a process for operating said circuit arrangement are disclosed. The triggering unit (3) is influenced by at least two independent influencing values which act upon the fuse element (...  
WO1998056095A3
Circuit protection systems employing arrangements of PTC devices and mechanical switches. The PTC device is not involved in the circuit until a fault is sensed. In one embodiment, a current sensing relay senses an overcurrent and directs...  
WO/1999/009574A1
The invention relates to a fuse element for a closed circuit, especially in motor vehicles, comprising a fuse which permanently interrupts the current when the current load exceeds the nominal current. The fuse element contains an additi...  
WO/1999/004474A1
A protective arrangement (10) for inclusion in an electric installation system designed to prevent the cause of fire or damage to the installation due to the sudden electrical failure or rise of temperature in the vicinity of the system....  
WO/1999/000882A1
The invention concerns a device for managing an electronic component (104) with nominal serviceable voltage functioning under radiation, consisting in: during a control phase, applying to the component (104) an initial supply voltage (11...  
WO/1998/058432A1
The invention relates to a method and device for monitoring insulation and fault current in an electrical alternating current network. The differential current formed by vectorial addition is detected between at least two network conduct...  
WO/1998/056095A2
Circuit protection systems employing arrangements of PTC devices and mechanical switches. The PTC device is not involved in the circuit until a fault is sensed. In one embodiment, a current sensing relay senses an overcurrent and directs...  
WO/1998/047213A1
Several partial discharge measuring probes (4, 5, 6) which detect electromagnetic signals from partial discharges are provided in a high-voltage installation. The corresponding measuring data is fed into an evaluation device (10) with a ...  
WO/1998/045920A1
An electrical safety device comprises a sensor strip (123) disposed in the insulation (121) of an electrical power cord (101) or other electrical apparatus. The sensor strip is made of a conductive polymer with a positive temperature coe...  
WO/1998/039753A1
A system monitors and controls external utilities interacting with a site to mitigate hazards during disaster or other emergency situations. Upon the occurrence of a disaster or other emergency event, the system disconnects the external ...  
WO/1998/035441A1
The invention relates to a controllable switching device comprising at least one switch which has at least one active zone to be protected against electric and/or thermal overload. Said switching device has at least one load circuit and ...  
WO/1998/035419A1
The invention relates to a circuit breaker, which is in a fault situation arranged to disconnect an electrical apparatus, such as a distribution transformer, from an average voltage network or a high voltage network at each terminal. At ...  
WO/1998/035440A1
The invention relates to an arrangement and method for measuring the temperature of a component, in particular of a contactless switch, whereby a transistor or diode is used as a temperature sensor.  
WO/1998/026487A1
A device (1) for supplying electric power to a load (4) connected to the device (1) in a power-on mode comprises a driver stage (7), a control unit (9), adapted to supply turn-on pulses to the driver stage (7), and an output stage (12) w...  
WO/1998/024161A1
An apparatus and method for the avoidance of electrical shock in an electrical system. For a two wire appliance, the device consists of a current interrupting circuit that bidirectionally impedes current flow for short time intervals in ...  
WO/1998/016778A1
A lamp (10) incorporating one or more safety features for reducing the risk of fire or heat damage associated with improper operation of the lamp (10). One safety feature can be an automatic safety switch (20) for terminating power to th...  
WO/1998/010301A1
A loss-less current sensing driver and method includes providing current (603) to a load (113) from a power supply (115) through a transistor (101). A voltage drop is measured (605) across the transistor (101) responsive to the provision...  
WO/1998/002946A1
An overcurrent protection system which will give a rapid response to even relatively small overcurrents. A sensor element, e.g. a resistive element, and a circuit interruption element, e.g. a set of relay contacts, are placed in series w...  
WO/1998/000620A1
An electric switch has a signal generator (1) which causes a switching function when a closed circuit is interrupted. A relay-safety combination (2) is connected into the closed circuit and the electric input and output lines between the...  
WO/1997/042512A1
An abnormality detection apparatus includes a receiver (3; 3A; 3B) for receiving microwaves (2, 8) emitted from objects (1; 1A; 1B; 1C; 1D; 1E; 1F); a detector (4) connected to the receiver (3; 3A; 3B), for converting the microwaves (2, ...  
WO/1997/026687A1
The invention concerns a socket (1) in which a switching device (11) switches voltage from the supply side (3) through to the consumer side (4) only when a consumer (2) is provided. A measuring device (5), which is supplied with power, c...  
WO/1997/012379A1
A method for preventing explosions and fires in an electrical transformer (1) with a tank (2) filled with an inflammable coolant (7), wherein a break in the electrical insulation of the transformer (1) is sensed using a pressure sensor m...  
WO/1997/012174A1
A method and a device for sensing the distance between a first object and a second object so as to activate or facilitate predetermined actions when the distance has attained a certain value. A person (1) (first object) holds a handle (2...  
WO/1997/011582A1
The invention concerns a thermally-protected control apparatus containing electrical components, in particular for controlling high-pressure gas-discharge lamps in motor vehicle headlights. According to the invention, electrical componen...  
WO/1996/042131A1
A household electrical service (10) is protected against overheating by running a sensor line or wire (36 or 38), coextensively together with hot, neutral and ground lines or wires (12, 13, 14 or 31, 32, 33), from a power company hookup ...  
WO/1996/037955A1
The invention relates to an integrated circuit with a power transistor (T1, T2, T3) and a temperature-dependently operating circuit (14) thermally coupled to the power transistor. There is a pnp or npn transistor (T5), the off-state curr...  
WO/1996/034450A1
A method and a device for protecting regenerating resistor by which a regenerating resistor is sufficiently protected from thermal damage caused by excessive regeneration by using both a thermostat and an analog simulation circuit in coo...  
WO/1996/030992A1
A hybrid alternator comprising a stator (702) and a rotor (710) mounted for rotation within the stator and separated therefrom by an air gap. The rotor has a rotor core defining a plurality of magnetic poles (716) wherein adjacent ones o...  
WO1996007192A3  
WO/1996/010284A1
The base of a thermal shutdown bipolar transistor (Q6) having a VBE(on) which decreases with increasing temperature is biased with a bias voltage VPTATbias which increases proportionally with increasing absolute temperature. By supplying...  
WO/1996/007192A2
Switching devices may have means for contactlessly detecting their position. According to the invention, to recognise the switching position there are magnetic field sensors arranged at a suitable point inside and/or outside the device h...  

Matches 451 - 500 out of 4,779