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7538519 |
Information handling system with battery protected from non-permanent failures
In a method and system for protecting a battery being charged by an electrical device, a current flowing through a cell stack of the battery is measured. If the measured current is greater than a...
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7218496 |
Overcurrent protection circuit
The voltage generator circuit includes a regulator, a first sensor circuit, and a second sensor circuit. The first sensor circuit includes a first transistor, a first resistor, and an error...
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7064946 |
Electronic fuse
An electronic fuse comprising an integrated circuit having a control output terminal coupled to a control electrode of a power semiconductor switching device, the power semiconductor switching...
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6882511 |
Electronic earth leakage current device
An electronic leakage current device a low-voltage power line, comprising:
a moving contact and a fixed contact which can be mutually coupled/uncoupled; first sensor means for detecting a...
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6842322 |
Electronic trip device comprising a capacitor for supply of a trip coil
The trip device comprises a system-powered power supply circuit comprising a capacitor for power supply of a trip coil. When the trip device is powered on, the capacitor charges and its voltage is...
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6747860 |
Power-supply feedthrough protection circuit for 5-volt failsafe CMOS drivers
A power supply feedthrough protection circuit which solves the problem of voltage feedthrough from a bus cable charging a chip power-supply beyond acceptable transistor limits. The circuit...
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6731487 |
Method and devices for optimizing power consumption of trip units containing microprocessors
A method is provided for optimizing the power consumption of a trip unit. The method comprises sensing a first output from a power system, the first output including a first current and a...
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6721154 |
Apparatus and method for representing protection device trip response
A method and apparatus generates an enhanced trip time curve capable of capturing both the non-sinusoidal energy and series effects. Relevant data including time, current, and energy is plotted on...
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6696708 |
Electrostatic discharge protection apparatus
The present invention reveals an electrostatic discharge protection apparatus including a silicon controlled rectifier, a triggering voltage adapter network and a holding voltage adapter network....
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6633474 |
Selective electronic tripping element
The instantaneous tripping threshold of the selective tripping device is a decreasing function of a quantity representative of the time necessary for the current to reach the peak value. The...
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6552675 |
Electrical protection device with analog-to-digital converter of the sigma-delta type
The electrical protection device comprises a plurality of sensors, a multiplexer and a sigma-delta type analog-to-digital converter. The converter comprises a sigma-delta modulator in series with a...
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6542345 |
Circuit breaker
In order to provide a circuit breaker, in particular a residual-current circuit breaker or residual-current device, having a variable time delay, which firstly has a stable no-trip response to...
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6534991 |
Connection tester for an electronic trip unit
A trip unit connection tester ( 10 ) is arranged to test the electrical connections ( 12 ) and ( 14 ) between a trip unit ( 16 ) and actuator ( 18 ) mounted within a circuit breaker ( 20 ). Tester...
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6529358 |
Driver protection circuit for preventing damage due to line contact with ground or supply voltage
This circuit is inserted between a terminal (RGB) and a line (LI). The signal of the input terminal (RGB) is applied to the base of a bipolar amplifier transistor (T 2 ) mounted with a top load (LR...
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6504694 |
Circuit breaker system with ASM instantaneous overcurrent indication
A circuit breaker system ( 100 ) providing application specific module (ASM) instantaneous overcurrent indication is disclosed herein (FIG. 5 ). A trip unit ( 110 ) included in the circuit breaker...
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6466029 |
Power line testing device with signal generator and signal detector
A power line testing device has a signal generator that is adapted to be connected to one of a plurality of AC branch circuits, and generates an identification signal. This identification signal...
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6377431 |
Non-automatic power circuit breaker including trip mechanism which is disabled after closure of separable contacts
A non-automatic power circuit breaker includes separable contacts for movement between a closed position and an open position, and an operating mechanism for moving the separable contacts between...
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6295190 |
Circuit breaker arrangement with integrated protection, control and monitoring
A PCM module arrangement includes a three phase circuit breaker and PCM electronics unit. Each phase of the circuit breaker has a Rogowski coil at the line side and load side contacts in a vacuum...
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6279115 |
Circuit arrangement for monitoring of an electric tripping device for low-voltage switches
A circuit arrangement is described for monitoring an electronic tripping device for low-voltage switches having a microprocessor device which, in conjunction with a digital-analog converter,...
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6195243 |
Method and apparatus for adaptive configuration and control in a network of electronic circuit breakers
A system including a load center monitor (10) connected to a plurality of digitally enhanced circuit breakers (40) by a communication bus (26) forms a network of reconfigurable circuit breakers...
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6185482 |
System and method for rms overcurrent backup function
A method and apparatus for over current backup protection is provided. The method generates a set of root mean square (rms) values from samples that are taken from the system current. Several rms...
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6175479 |
Instantaneous protection device and method for a circuit breaker
The present invention involves a power circuit breaker that conditionally and temporarily enables instantaneous trip protection. A position sensor senses whether the breaker contacts are open or...
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6081729 |
Encapsulated tubular conductor
An encapsulated tubular conductor having at least two antenna elements disposed on the capsule thereof for maintaining therebetween wireless information transmission in a transmitting-receiving...
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6018300 |
Fault monitoring
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6011416 |
Switch circuit having excess-current detection function
A microcomputer 4 responds to an instruction signal to turn the load L on or off to control the FET 2 through the drive circuit 5. The microcomputer 4 samples an electric current I L which is...
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5943204 |
Electronic trip unit with dedicated override current sensor
An electronic trip unit for a circuit breaker having two current sensors per phase, wherein the first magnetic core current transformer is designed to monitor current in the normal and overcurrent...
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5926355 |
Electrical switching apparatus employing battery-powered indicator
A circuit breaker includes separable contacts for movement between a closed position and an open position. An operating mechanism moves the separable contacts between the closed and open positions...
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5877691 |
Circuit breaker with a circuit breaker unit and processing, calibration and communication modules
The circuit breaker comprises a circuit breaker unit onto which there are fixed a communication module, a processing module and a calibration module. The communication module communicates with the...
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5875088 |
Electrical switching apparatus employing interlocks for first and second trip functions
A circuit breaker includes separable contacts for movement between a closed position and an open position. An operating mechanism, which moves the separable contacts between the closed and open...
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5856903 |
Matching overcurrent characteristic curves
A method for configuring a digital overcurrent relay to provide a plurality of selectable time overcurrent characteristic responses corresponding to a plurality of target curves. According to one...
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5838776 |
Power controller for a heating/air conditioning unit
A power controller for a powered device such as a heating/air conditioning unit that monitors and controls the supply of power to an individual heating/air conditioning unit and shuts off power to...
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5825643 |
Programming device for a circuit breaker
A portable programming device is provided for communicating with and downloading tripping characteristics to a circuit breaker electronic trip unit. The programming device incorporates an umbilical...
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5747955 |
Current sensing module for a variable speed AC motor drive for use with a treadmill
A current sensing module for use with a variable speed AC motor control drive system for use with devices such as treadmills and including a module to sense the current of pulse width modulated...
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5691871 |
Test circuit for electrical switching device
A motor starter for an electrical circuit including a power source and a load, includes an electrical contactor having separable contacts for switching an electrical current flowing between the...
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5680052 |
Fault indicator tester with test bar and test chamber
A testing apparatus for testing a sample fault indicator (11) of the type which has a current sensor (15), an automatic reset, an inrush restraint feature, and an indicator display (13) that are...
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5656931 |
Fault current sensor device with radio transceiver
A fault current sensor device detects and distinguishes abnormal current events on alternating current overhead and underground power transmission lines. The sensor distinguishes whether the...
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5627716 |
Overcurrent protection device
A microprocessor based overcurrent trip unit includes an analog circuit for monitoring phase currents in the electrical interrupting device. The analog circuit is adapted to interface with the...
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5581471 |
Method and apparatus for storing electric power measurements
An electronic instrument that records electric power measurements. The instrument contains two types of memories: the first type of memory can tolerate wide fluctuations in ambient temperature but...
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5500781 |
Digital circuit interrupter with multiple accessory function
An integrated circuit breaker having several accessory functions along with automatic overcurrent protection, allows selection between the various accessory functions in different combinations....
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5471359 |
Polyphase current monitor and control system
A solid state sensing and control device for monitoring either D.C. or A.C. currents of one or more phases that is ideal for protecting motors and other A.C. loads. The programmable monitoring...
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5426592 |
Circuit breaker trip unit which automatically adapts to operated with a particular display module
The present invention provides a circuit breaker trip unit configured to operate with a plurality of different plug-in display units. The display unit includes a memory which stores data...
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5367427 |
Overcurrent trip unit with indication of dependency of trip functions
A graphical representation of the current/time trip characteristic displayed on the operator's panel of an electronic trip unit for a circuit interrupter, has different indicia, such as different...
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5335135 |
Fault recording system for an electric power trip unit
A low voltage electric power monitoring and circuit breaker system includes two processors. The first processor activates the circuit breaker when an overcurrent condition is detected and the...
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5331501 |
Electrical switching apparatus with digital trip unit and memory reset
A microprocessor based switch such as a circuit breaker has a memory capacitor charged by the microprocessor to generate an analog equivalent of a digitally modelled heat state signal. A selected...
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5311392 |
Dual processor electric power trip unit
A low voltage electric power monitoring and circuit breaker system includes two processors. The first processor activates the circuit breaker when an overcurrent condition is detected and the...
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5307230 |
Circuit breaker with protection against sputtering arc faults
A circuit breaker includes an electronic trip device which responds to sputtering arc-type faults. Level detectors compare the current in the protected circuit to a plurality of threshold levels...
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5270898 |
Sure chip plus
A hybrid monolithic IC that is standardized for controlling various types of electrical equipment, such as circuit breakers, motor controllers and the like. The IC is a hybrid monolithic IC,...
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5216352 |
Solid state current controlled interruption system
A solid state circuit interruption arrangement monitors a current path to provide protection to both a load and a solid state switch. The arrangement includes an energy absorber for absorbing...
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5208720 |
Electronic trip device with short delay function
The short time delay circuit comprises a counter which is zero reset when the signal representative of the current is greater than or equal to a threshold, and controls count-down of an up-down...
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5195012 |
Electronic trip device comprising an improved long delay function
To perform the long delay function of an electronic trip device, a quantity (TLR1) representative of the thermal current state varies proportionally to the difference (I 2 -Is 2 ) between the...
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