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7612471 |
Hybrid electrical switching device
The invention relates to a hybrid electrical switching device, comprising an electromechanical relay including a mechanical switching element to be operated by an electrical coil, and a main...
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7593198 |
Relay circuit
A switching circuit for connecting a power source to a load is described. The circuit comprises a first relay and at least one second relay in parallel arrangement with the first relay. The...
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7593197 |
Electric circuit
An electric circuit in which a combined resistance including a plurality of resistors of a small rating is disposed. The electric circuit includes a bypass section in order to allow a short-circuit...
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7542250 |
Micro-electromechanical system based electric motor starter
A motor starter is provided. The motor starter includes micro-electromechanical system switching circuitry. The system may further include solid state switching circuitry coupled in a parallel...
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7538990 |
High voltage DC contactor hybrid without a DC arc break
An apparatus, and a method of opening and closing electrical power feed lines using a hybrid contactor, which combines a traditional set of mechanical main contacts with a high voltage solid state...
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7508636 |
Hybrid circuit breaker device
This invention relates to a circuit breaker device comprising a main branch ( 1 ) comprising a mechanical switch element ( 2 ) and an auxiliary branch ( 3 ) containing a semiconductor breaking cell...
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7440244 |
Self-triggering superconducting fault current limiter
A modular and scaleable Matrix Fault Current Limiter (MFCL) that functions as a “variable impedance” device in an electric power network, using components made of superconducting and...
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7433229 |
Flash memory device with shunt
A shunt activation signal is transmitted by an external control terminal through an external transmission interface to switch a flash memory controller in a shunt mode. The shunt activation signal...
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7405910 |
Multifunction hybrid solid-state switchgear
A universal hybrid solid-state switchgear for power transmission or distribution systems incorporates a fast mechanical switch and solid-state power electronics switching circuits to provide...
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7405544 |
Voltage regulating circuit for uninterruptible power supply
A voltage regulating circuit has a first switch, a transformer and a second switch. The first switch has an input node, a first node and a second node. The transformer is connected to the switches...
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7391133 |
Hybrid switch
An electrical switching topology for a hybrid switch provides extremely low losses in both cryogenic and non-cryogenic electronic systems. In this switch having switch modules connected in...
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7385791 |
Apparatus and method for relay contact arc suppression
An arc suppression circuit for a power switch or power supply with a relay having a coil and a set of contacts for providing a portion of an input power as load power to an output. The relay coil...
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7265952 |
Two-terminal protecting circuit
An integrated circuit provides a load with back-flow and open-circuit protection and includes a load, a trigger circuit, and a shunt circuit. The integrated circuit provides large-size LED displays...
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7239492 |
Control system for at least one vacuum interrupter gap
A control system for at least one vacuum interrupter gap in a high-voltage switching device includes at least one non-reactive control resistor disposed in parallel with the vacuum interrupter. The...
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7149063 |
Apparatus, methods and articles of manufacture to minimize arcing in electrical connectors
An electrical connector and methods for minimizing arcing when the connector is connected or disconnected under load are disclosed. The invention provides an arc reduction circuit with one or more...
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7145757 |
System for eliminating arcing faults and power distribution system employing the same
A shorting system, which eliminates persistent arcing faults in power distribution equipment, includes a first shorting switch having separable contacts, an actuation input and a fuse electrically...
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7110225 |
Arc-limiting switching circuit
First and second switches and an arc-limiting switch are closed during a turn-on sequence in a switching circuit. The arc-limiting switch is left open during a turn-off sequence. Current flow...
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6930457 |
DC motor brush filter circuit
The present invention provides a motor control circuit including a motor with a motor winding and a brush, a battery, a relay, and a ground return circuit. The battery is for energizing the motor....
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6818953 |
Protection of an integrated circuit against electrostatic discharges and other overvoltages
The forming of an integrated circuit including at least one element of electronic protection of the circuit formed of at least one switch for short-circuiting supply conductors arranged in a rail,...
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6741435 |
Power controller with DC ARC-supression relays
A DC arc-suppressor for network appliance power managers comprises an electromechanical relay that controls the flow of battery power to a network appliance by remote control. The relay includes...
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6643112 |
Semiconductor switch-assisted electromechanical relay
An electromechanical relay including a mechanical displacement electrical contact and a transistor parallel-connected with the electrical contact. The contact is closed for a voltage V...
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6633467 |
AFCI which detects and interrupts line side arcing
An arc fault causes the line voltage across the line terminals of an arc fault circuit interrupter (AFCI) to change its characteristic voltage pulse shape as the line voltage is momentarily removed...
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6594126 |
Method and apparatus for extinguishing an arc through material surface ablation
A technique is provided for forcing greater voltage investment in an arc developed during interruption of a current carrying path. A source element is provided in a secondary current carrying path...
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6543673 |
Dissolving shunt connection system for ESD sensitive components
A method and system are disclosed for protecting an electrical component from electrostatic discharge prior to its electrical connection to an additional component. Specifically, a flex on...
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6535366 |
High-speed current-limiting switch
The current-limiting switch (S) has an arc-resistant contact arrangement (K 1 ), which is intended to carry the rated current (I N ), of a first switching point (S 1 ), and two commutation paths (P...
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6215632 |
Switching device
A switching device including a movable contact member. The movable contact member produces an isolating distance and includes an integral semiconductor switching element.
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6201678 |
High-voltage switch gear protection circuit
A switch gear protection circuit for use in electric vehicles provides parallel circuit pathways for selectively coupling a power source to a capacitive load. A first pathway includes a main switch...
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6111377 |
Control device for a multiphase electric motor
Control device for a multiphase electric motor (M) comprising firstly two two-directional static switches (IS1, IS2) each associated with a terminal of a shunt contactor (S) installed in parallel,...
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6011678 |
Electrical device with double AC breaking contacts
The device includes two breaking areas formed at each side of a contact bridge carrying main contacts that can be separated from fixed contacts located in the breaking areas and fixed to main...
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5956222 |
Electronic switch for quick, automatic response to current overloads
An electronic switch circuit for controlling a main circuit including a power source and a load, the electronic switch circuit including (a) an electromagnetic relay device including an...
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5933304 |
Apparatus and method of interrupting current for reductions in arcing of the switch contacts
A current interrupter circuit includes a primary current path and a secondary current path in parallel with one another and provided between input and output terminals. At least one solid state...
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5805393 |
Overcurrent protection circuit with improved PTC trip endurance
An overcurrent protection system which will give a rapid response to overcurrents which cause a reduction in the voltage across the load, e.g. a partial or complete short across the load, and which...
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5793586 |
Hybrid high direct current circuit interrupter
A device and a method for interrupting very high direct currents (greater than 100,000 amperes) and simultaneously blocking high voltages (greater than 600 volts). The device utilizes a mechanical...
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5790354 |
Hybrid power switching device
A hybrid power switching device for eliminating mechanical relay arcing. The device reduces mechanical relay contact damage due to arcing and substantially reduces power dissipation by placing a...
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5777286 |
Electric device having separable contacts with arc switching
An electrical device for switching an arc to a path parallel to a device to be protected. The electrical device includes double breaking contacts and an arc transfer electrode associated with the...
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5737162 |
Circuit breaking device
An objective of this invention is to provide a DC circuit breaking device having functions for transmitting direct currents to an electric power system and interrupting direct currents to the...
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5726843 |
Current limiting circuit breaker
A plurality of solid-state switches are provided in parallel with a main circuit switch. A main circuit current is detected by a first current detecting device. A current flowing in each of the...
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5703743 |
Two terminal active arc suppressor
The arc suppression circuit includes an insulated gate bipolar junction transistor (IGBT) connected across the electrical switch contacts to be protected. When the contacts open, the combination of...
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5699218 |
Solid state/electromechanical hybrid relay
A hybrid or combination solid state/electromechanical relay circuit combines the advantageous features of solid state and electromechanical relays but avoids their disadvantageous features. An...
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5677839 |
On-vehicle electronic control device and a method of detecting a failure thereof
An on-vehicle electronic controller which controls the operation of a device of an automobile or an internal combustion engine is disclosed. A relay intermittently supplies power to a controlled...
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5666254 |
Voltage sensing overcurrent protection circuit
An overcurrent protection system which will give a rapid response to overcurrents which cause a reduction in the voltage across the load, e.g. a partial or complete short across the load, and is...
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5650901 |
Curcuit breaker and circuit breaking apparatus
A circuit breaker for a distribution system includes a non-self-extinction type semiconductor switch, a current limiting element connected in series to the semiconductor switch for suppressing a...
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5633540 |
Surge-resistant relay switching circuit
In a relay switching panel, a switching circuit operates to selectively connect and disconnect resistive, capacitive and inductive loads to an AC power source with substantially no arcing. The...
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5528443 |
Hybrid switch using a one-shot firing pulse
Semiconductor switching elements (inverse-parallel connected thyristors) of each main circuit element unit are connected in parallel to a main contact of an electromagnetic contactor. An operation...
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5517378 |
Direct-current breaker for high power for connection into a direct-current carrying high-voltage line
A high power d.c. breaker for connection into a d.c. carrying high-voltage line (L), has two normally closed and electrically series-connected mechanical breaks (BSI, BSII) adapted to be traversed...
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5488530 |
System and method for protecting relay contacts
A system and method for protecting relay contacts from erosion utilizes a sensor which senses voltage change in a switch controlling a load relay. In response to operation of the switch, the sensor...
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5164872 |
Load circuit commutation circuit
Arrangement for arcless interruption of a-c load current in response to a current interruption command. Separable contact means serially connected with controlled impedance means, and parallel...
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5119261 |
Circuit arrangement for switching current to thyristors
The invention relates to a circuit arrangement for switching current from a contact to a thyristor connected in parallel to the contact. In the inventive circuit arrangement ohmic resistances (7,...
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4992904 |
Hybrid contactor for DC airframe power supply
A contactor (12) for controlling connection of a DC power supply to an electrical load (14) in includes a series circuit (19) disposed between a nonground DC potential and a load having first (20)...
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4959746 |
Relay contact protective circuit
A contact protective circuit for a relay detects a transient in the relay operating coil and turns on a low resistance power MOSFET in shunt relation with the contacts before the contacts close or...
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