152results about "Calibrating/seeting protective devices" patented technology

A method and system to calibrate a motor circuit protection device is disclosed. An example method calibrates a signal chain of a circuit breaker. The signal chain includes a current transformer, a burden resistor, a stored energy circuit and a controller. The circuit breaker includes a memory coupled to the controller. A calibration instruction routine is written in a first location of the memory. A test current is injected in the circuit breaker signal chain. The test current peak of the test current in the circuit breaker signal chain is measured. Data indicative of the test current peak is stored in a second location of the memory. The test current peak data is read from the second location of the memory. The test current peak data is compared with nominal current data related to the signal chain remotely from the circuit breaker. A calibration factor is determined based on the comparison.

A sensing module and method for monitoring various physical parameters, and particularly environmental parameters to which a living body may be subjected, for example, impacts and shock wave pulses. The module at least one energy storage device and at least one set of electromechanical sensing elements contained in a housing. The sensing elements are responsive to an external environmental input, and each sensing element defines an open electrical path when not subjected to the input, is operable to define a closed electrical path that produces an output in response to the input if the input exceeds a threshold of the sensing element. The module generates data corresponding to the outputs of the sensing elements and records the data.

Implantable sensing modules and methods for monitoring various physical parameters, including physical parameters of a living body and environmental parameters to which the living body may be subjected, for example, impacts. A method for monitoring impacts to which a living body is subjected entails the use of an implantable sensing module that has a rigid housing containing at least one energy storage device and at least one electromechanical sensing element that is responsive to impacts. The module generates data corresponding to impacts to which the electromechanical sensing element is subjected, and records the data in memory. The module is preferably implanted in a living body so that the module is connected to a rigid portion of the living body, in particular, a bone or tooth.

The invention provides a miniature circuit breaker assembly detecting system. The system comprises an assembling table, an automatic code spraying unit, an automatic riveting unit, an on-off detecting unit, a time delay adjusting unit, an instant detecting unit, a voltage-resistance detecting unit, an automatic transfer printing unit, and a package assembling table which are sequentially connected with one another through transmission belts. Compared with the prior art, the miniature circuit breaker assembly detecting system uses an automation production detecting mode, enables the working efficiency of circuit breaker production to be greatly improved, meets the requirements of users, and has great significance on the circuit breaker production.

A computer for continuous calibration of circuit breaker trip units and metering devices includes a processor and a memory device. The computer is configured to request and receive circuit breaker current data from a plurality of circuit breaker trip units. The circuit breaker current data represents current data associated with the circuit breaker trip units over a collection interval. The computer is configured to receive main current data from a main trip unit. The computer is configured to determine a plurality of calibration factors for the circuit breaker trip units based upon the circuit breaker current data and the main current data. The computer is additionally configured to transmit the calibration factors to the circuit breaker trip units.

The invention relates to a distance adjustment tool for assembly of a circuit breaker and an assembly for a crank arm box of the circuit breaker. The distance adjustment tool comprises a crank arm limitation structure which is detachably assembled on the corresponding crank arm box during use for limiting the swinging of an input crank arm, the distance adjustment tool also comprises an adjustment rod arranged on a corresponding switching brake bar in series, and an adjustment screw rod is arranged on the adjustment rod and is in threaded connection with the switching brake bar for adjusting the distance between a corresponding movable contact and a fixed contact. The distance adjustment tool for the assembly of the circuit breaker, provided by the invention, can be used for adjusting the distance between the movable contact and the fixed contact and ensuring that inclined angles of input crank arms of different phases are consistent.

This invention relates to digital automatic breaker overload shortcut test bench, which comprises rack, digital alternating constant current, direct lifting transducer and position device, pressing device, transmission device, gate device and control device fixed on the rack, wherein, the position device card tank is connected to transmission device push board; pressing device is set with two gas cylinders fixed on both sides and with two free ends relative to two output ends; gate device is above press device; digital alternating constant power output end is connected to the lifting transducer input end.

The invention relates to a 126kV breaker arc extinguish chamber centring frock comprising a stander and a centring platform arranged on the stander. The 126kV breaker arc extinguish chamber centring frock also comprises a fixed fixture table and a movable fixture table, wherein the inner side of the fixed fixture table is provided with a ladder type round table; a clamping mechanism is installed on the fixed fixture table at both sides of the round table; the movable fixture table is installed at the other end of the centring platform to be arranged relative to the fixed fixture table; the bottom of the movable fixture table is in a sliding fit with a linear guide track horizontally arranged on the centring platform; the inner side of the movable fixture table is provided with the round table; the center of the round table of the movable fixture table is provided with a stationary contact seat clamping mechanism; and a central axis of the round table of the fixed fixture table is coincident with the central axis of the round table of the movable fixture table. When the 126kV breaker arc extinguish chamber centring frock is used for centring, a breaker arc extinguish chamber support seat is coincident with the axis of the round table of the fixed fixture table and a breaker arc extinguish chamber stationary contact seat is coincident with the central axis of the round table of the movable fixture table so that the breaker arc extinguish chamber stationary contact seat is coincident with the axis of a support seat, therefore, the requirement of axiality of a movable contact and a stationary contact is ensured.

The invention relates to a debugging device of a route and an opening range size of a circuit breaker. The device comprises a supporting rod, a rotary fan plate, a U-shaped route plate, a clamping plate and an adjusting screw rod, wherein the rotary fan plate is provided with a thread hole and the lower end of the adjusting screw rod is rotatably arranged in the thread hole of the rotary fan plate; the adjusting screw rod is rotatably arranged at the lower end part of the route plate in a penetrating manner and is positioned and matched with the U-shaped route plate through a positioning structure; the positioning structure comprises a screw sleeve, a clamping groove arranged on the adjusting screw rod and a clamping ring clamped in the clamping groove; when the upper end of the adjusting screw rod is contacted with the clamping plate, the size from the center of the connecting part of the clamping plate to the upper end face of the screw sleeve is the pre-set size of a switching-on position; the size from the center to the upper end part of the U-shaped route plate is the pre-set size of a switching-off position; and the lower end part of the supporting rod is provided with a fixing structure for fixing the supporting rod on a cross beam of the circuit breaker. According to the debugging device disclosed by the invention, the route and the opening range of the circuit breaker are debugged to be standard, so that the error caused by manual discontinuous measurement is reduced and the debugging device is very convenient and rapid.

The on-line intelligent checking table for the protection property of low voltage breaker includes work table, fixture, display device, main detection loop and power circuit. The on-line intelligent checking table features that it includes also product ID distinguishing device, main control circuit and fixture drive executing mechanism. Owing to the product ID distinguishing device, the main control circuit and the fixture drive executing mechanism, the present invention reads in the product code, establishes product quality inspecting database, and stores and manages the database in PC during inspection, and this is favorable to raising product managing level and improving production process by means of the user's feedback information, raising product quality and preventing phony.

A MEMS module that contains at least one integrated energy storage device whose discharge is minimized and controlled, so that power is available for system operation over longer periods of time. The MEMS module includes a device electrically coupled to the energy storage device for controlling charge transfers from the energy storage device while preventing charge leakage from the energy storage device. The controlling device includes a plurality of integrated MEMS switches that define open electrical paths that prevent charge leakage from the energy storage device through the MEMS switches, and are then operable to define closed electrical paths to allow charge transfers from the energy storage device, and preferably also allow charge transfers to the energy storage device, through the MEMS switches. The charge transfer can be utilized to power electronic circuits or store data in non-volatile digital memory.

A trip cam is for an indication assembly of an electrical switching apparatus. The electrical switching apparatus includes a housing and a number of poles. Each of the number of poles includes a pair of separable contacts and an operating mechanism structured to open and close the separable contacts. The indication assembly includes a cradle member. The trip cam includes: a mounting portion; a transfer leg extending from the mounting portion, the transfer leg being structured to cooperate with each of the number of poles; a driving leg extending from the mounting portion in a first direction, the driving leg being structured to be driven by the cradle member; and a trip indicator leg including a base portion. The base portion extends from the mounting portion in a second direction generally opposite the first direction.

A sensing module and method for monitoring various physical parameters, and particularly environmental parameters to which a living body may be subjected, for example, impacts and shock wave pulses. The module at least one energy storage device and at least one set of electromechanical sensing elements contained in a housing. The sensing elements are responsive to an external environmental input, and each sensing element defines an open electrical path when not subjected to the input, is operable to define a closed electrical path that produces an output in response to the input if the input exceeds a threshold of the sensing element. The module generates data corresponding to the outputs of the sensing elements and records the data.

The invention relates to a tool for dismounting a break-brake spring. The tool comprises at least two supporting rods, the supporting rods are used for being fixedly connected with a spring shell of the spring to be dismounted, the axes of the supporting rods extend in the compression direction of a close-brake spring, the supporting rods are sleeved with a compression spring supporting plate capable of moving in the direction of the axes of the supporting rods, the compression spring supporting plate is provided with a bottom face used for jacking and pressing a compression spring plate to compress the break-brake spring and a top face away from the bottom face, a connecting sleeve penetrating hole is formed in the compression spring supporting plate and used for enabling a connecting sleeve on a close-brake spring device to completely penetrate through the compression spring supporting plate from the bottom face of the compression spring supporting plate to the top face of the compression spring supporting plate, and the supporting rods are provided with drive structures used for driving the compression spring supporting plate to move in the compression spring direction and locking structures used for preventing the compression spring supporting plate from moving reversely under the action of the break-brake spring after the compression spring supporting plate moves in place. The tool is simple in structure, convenient to mount and carry and convenient to use, the compression distance of the break-brake spring is not limited, good universality is achieved, and the tool can be suitable for field debugging.

The invention discloses an auxiliary device of a debug circuit breaker mechanism, comprising a framework, a downward static contact which fixedly connected with the framework in such a way that the position is adjustable and an upward movable contact which is matched with the downward static contact. The upward movable contact is in a T-shaped shaft shape, the upper end thereof is a free end with a larger section, and the lower of the free end is a rod part with a smaller section; the rod part of the upward movable contact is slidingly connected within a guide sleeve which is fixedly connected with the framework; a contact self-closing compression spring is clamped between the free end of the upward movable contact and the guide sleeve; and the lower end of the rod part of the upward movable contact is connected with an insulating pull rod through a connecting rod. The auxiliary device of the debug circuit breaker mechanism can simulate an explosion chamber of the circuit breaker, and can substitute the explosion chamber in the procedure of debugging the mechanical property of the circuit breaker, thereby avoiding the damage of the explosion chamber caused by the mechanical failure of the circuit breaker mechanism during debugging.

The present invention provides an integrated screw-nut regulating locking device for solving problem of regulating and locking screw-nut. A technical scheme provided by the invention is that: a support fixedly connects with a X-Y workbench movable in dual-direction; a rotary frame rotatably connects with the support through a rotary component; a movable frame movably connects with the rotary framethrough a movable component; a rotary mechanism is arranged on a movable frame; the rotary mechanism comprises an outer sleeve, an inner sleeve, an outer layer flexible joint, an inner layer flexiblejoint, a first torque controller, a second torque controller, a first electromagnetic clutch, an electromagnetic brake, a coaxial component, an upper connector, an outer connector, an inner connectorand a hollow shaft motor with double-shaft. The present invention has beneficial effects in that the integrated screw-nut regulating locking device solves problems of regulating and locking screw-nut, etc.

An apparatus and method for testing thermal switches is disclosed including modulating the temperature of a receiver in thermal contact with a thermal switch at a first rate within a range containing the nominal switch temperature of the thermal switch. A first temperature at which the switch changes state is recorded. The temperature is then modulated at a second rate and a second temperature at which the switch again changes state is recorded. The temperature may be modulated at a third rate slower than the second rate to determine a third temperature. The first, second, and third switch temperatures are then processed and output to an operator. The first, second, and third rates may be determined according to an exponentially decreasing function.

Malfunction of an earth leakage breaker due to a lightning surge is prevented, and when a lightning arrester is short-circuited and damaged by a high-level lightning surge, a power supply short circuit is prevented.A contact 41, an overcurrent detector section 43, and a zero phase current transformer 44 are disposed in order from a power supply side to a load side, and a lightning arrester 3 is connected between the overcurrent detector section 43 and the zero phase current transformer 44.

A trip device support frame for a circuit breaker is provided. The trip device support frame includes a calibration tab that is a cantilever member. As a cantilever member, the calibration tab may be moved, i.e. deformed at a proximal end of the tab, so as to adjust the position of the calibration tab relative to the other portions of the trip device support frame. The calibration tab extends upwardly and the distal end thereof is disposed adjacent a top member of a circuit breaker housing assembly. The circuit breaker housing assembly, and more specifically a housing assembly top member, includes a calibration slot. In this configuration, the calibration tab distal end may be engaged by a calibration tool from the upper side of the circuit breaker rather than a lateral side.

An electromagnetic relay includes an electromagnet; an armature driven by a magnetic force of the electromagnet and configured to rotate with respect to the electromagnet; a card configured to linearly move when pressed by the armature; a movable contact point moving together with the card; a fixed contact point with which the movable contact point comes into contact or out of contact in response to rotation of the armature; and a housing for storing the electromagnet, the armature, the card, the movable contact point and the fixed contact point, the electromagnet and the fixed contact point being fixed to the housing. The armature includes at least one armature member made of a magnetic material and a connector piece made of a plastically deformable material, the connector piece being arranged between the armature member and the card.

A quick response / low voltage driven electromechanical switch equipped with a mechanism for adjusting a spring constant of a movable electrode is provided. The electromechanical element includes a first electrode formed on a substrate, a second electrode formed at a predetermined interval to the first electrode so that the interval is changed, and supporting portions for supporting the second electrode, wherein the supporting portions of the second electrode are able to be displaced.

The invention discloses a method for automatically adjusting the length of a screw of a low-voltage circuit breaker bimetallic strip. The method comprises the steps of capturing the image information of a screw and a nut of the low-voltage circuit breaker bimetallic strip by use of a CCD (Charge Coupled Device) camera in real time, and then inputting the image information which is subjected to A / D conversion by using an image acquisition card previously to a computer system, processing the image information by the computer system to obtain the central coordinate information of the screw and the nut and sending the central coordinate information to a PLC (Programmable Logic Control) unit in the form of pulses, and then driving an axial moving platform and a motor to displace so as to adjust the length of the screw. The method is capable of realizing automatic adjustment of the length of the screw by automatically detecting the moving state of the screw by use of the visual positioning technology and calculating the central coordinates of the screw according to the Hough algorithm, and therefore, the traditional manual positioning adjustment manner is changed, the detection efficiency and the accuracy and stability of the system are improved, and the reliability of overload protection of the low-voltage circuit breaker is improved; the method has practical value.

A circuit breaker includes: a bimetal bent by heat generated from a conductive current; a pressing member coupled to an upper part of the bimetal; a cross bar spaced from the pressing member by a prescribed gap, and configured to contact the pressing member and to rotate by being pressed when the bimetal is bent; and a switching mechanism operated by rotation of the cross bar, and configured to separate a movable contactor from a fixed contactor, wherein a coupling hole for coupling the pressing member is provided at an upper part of the bimetal, and wherein the pressing member is bonded to the coupling hole after a prescribed gap between the pressing member and the cross bar has been determined by apply of a current when the pressing member is in a state of being freely movable in the coupling hole.

The multifunctional flameproof protection switch includes current sensor, zero sequence mutual inductor, test button, reset button, control circuit, electromagnetic trip, two pieces of static contactor and moving contactor. Characters are: one end of moving contactors is setup at circuit board, an insulated hook is setup at middle, and a moving contactor is setup at the other end respectively; reset spring is sheathed on the reset button; being setup at base and configured opposite to insulated hook, reset hook is connected to iron core; static contactor is setup at one end of the static piece, and circuit board is at the other end of the static piece; N pole is passed through the zero sequence mutual inductor. L pole is passed through both of the inductor and current sensor. Using iron core to pull the reset hook makes release between reset hook and insulated hook so as to disconnect electrical source. Advantages are: large tripping force, quick action, and high sensitivity etc.

Methods, apparatus, and systems are provided for a selectivity device for a circuit breaker. The invention includes a modular assembly adapted to be coupled to a load conductor assembly. The modular assembly includes a tripping plunger including a cam surface adapted to interact with a breaker tripping mechanism; an armature coupled to the tripping plunger; a yoke adapted to generate a magnetic field in response to an electric current in the load conductor assembly and disposed to apply a magnetic force proportionate to the electric current on the armature; and a spring assembly adapted to counter-balance the magnetic force up to a predefined tripping current in the load conductor assembly. Numerous additional aspects are disclosed.