64results about How to "Quick trip" patented technology

The invention relates to an electronic power supply device, particularly a switched-mode power supply, for supplying power to a low-voltage load protected by a protective device, and to a method therefor. The invention also relates to a device for protecting a low-voltage load against an excess current and to an auxiliary power supply device for use with such a protection device. The conceptual core of the invention can be seen in providing measures which ensure that after a fault has been detected, for example a short circuit at the output, a current is supplied for a short period, for example 15 ms, which is of such a magnitude that a protective device can be reliably and quickly tripped. The period for this is selected in such a manner that electronic components, connected loads and feedlines are not damaged and destroyed.

An over-current protection device comprises two metal foils, a positive temperature coefficient (PTC) material layer and a packaging material layer. The PTC material layer is sandwiched between the two metal foils and has a volume resistivity below 0.1 Ω-cm. The PTC material layer includes (i) plural crystalline polymers having at least one crystalline polymer with a melting point less than 115° C.; (ii) an electrically conductive nickel filler having a volume resistivity less than 500 μΩ-cm; and (iii) a non-conductive metal nitride filler. The electrically conductive nickel filler and non-conductive metal nitride filler are dispersed in the crystalline polymer. The packaging material layer which encapsulates the chip is essentially comprised of the PTC layer and the two metal foils. The packaging material layer is formed by reacting epoxy resin with a hardener having amide functional group.

Provided is a short-circuit protection system of an energy-storage bidirectional converter. The short-circuit protection system comprises an AC side short-circuit protection module and a DC side short-circuit protection module, the two modules are designed independently and integrated inside a PCS, modular design is adopted by both protection, the AC side short-circuit protection module mainly comprises a diode three-phase full-bridge rectifier module, a high-power thyristor and resistors, and the DC side short-circuit protection module is formed by a high-power thyristor and resistors. The AC side short-circuit protection module is connected with a power conversion unit of the PCS in parallel, a three-phase supply firstly passes through the diode three-phase full-bridge rectifier module, then after the positive pole of a DC voltage output by a common cathode of the diode three-phase full-bridge rectifier module passes through the high-power thyristor, firstly the positive pole of the DC voltage passes through the resistors and finally flows back to a common anode of the diode three-phase full-bridge rectifier module, and a short-circuit protection loop is formed. The DC side short-circuit protection module is connected on a DC bus capacitor in parallel, the positive pole of a DC bus voltage firstly passes through the high-power thyristor, and then flows back to a DC bus negative pole through an absorption resistor, and the short-circuit protection loop is formed.

A circuit breaker arraignment including at least two trip mechanisms the first trip mechanism acting to immediately trip to open contacts of the circuit breaker upon reaching a first threshold current level, and the second trip mechanism acting to trip to open the contacts once both a second current threshold is reached and a time delay has elapsed, the contacts moved by a linkage assembly that is held under mechanical advantage such that when acted on by one of the two trip mechanisms, the mechanical advantage is released to rapidly open the contacts.

A trip structure of a circuit breaker comprises an operating mechanism and an electromagnetic tripper, wherein the operating mechanism is in linkage with an operating handle of the circuit breaker to drive a movable contact assembly to swing and match with a static contact, the operating mechanism comprises a jump pin and a lock which are buckled and connected, an extension end is arranged on the lock and is matched with a top rod of the electromagnetic tripper, and a trigger bulge is also arranged between the lock and the movable contact assembly; and when the circuit breaker is circuit-shorted, the top rod of the electromagnetic tripper collides with the extension end of the lock, the movable contact assembly swings to push the lock via the trigger bulge by means of an electric repulsive force between a movable contact of the movable contact assembly and the static contact, and the lock and the jump pin are pushed to be unlocked jointly by the top rod of the electromagnetic tripper and the movable contact assembly. In the trip structure of the circuit breaker, provided by the invention, the circuit breaker is rapidly tripped by additionally arranging the trigger bulge between the lock and the movable contact assembly, the trip structure is simple and reliable, a fusion welding phenomenon occurred between the movable contact and the static contact caused by long trip time can be effectively prevented, and the disconnection capability of the circuit breaker is improved.

The invention provides a novel action mechanism of an electrical leakage protection module. The novel action mechanism comprises a base, a traction piece and a tripping actuating piece. The novel action mechanism also comprises a reset piece which can move on the base under the effect of an external force and is provided with a first matching portion and a first elastic element, wherein the first matching portion is provided with an acceleration tripping piece; the tripping actuating piece is provided with a second push rod; the second push rod is provided with a second matching portion; when no electric leakage occurs, the first matching portion is matched with the second matching portion such that the tripping actuating piece is immobile, and the first elastic element is in an energy storage state; when electric leakage occurs, the tripping actuating piece drives the second push rod to rotate under the effect of the traction piece, such that the first matching portion can be separated from the second matching portion in a sliding manner, at this moment, the first elastic element releases energy so as to apply an external force to the reset piece such that the reset piece can move on the base; the reset piece drives the acceleration tripping piece to move and force the acceleration tripping piece to abut against the second push rod such that a rotation actuating force can be to applied to the second push rod; and the direction of the rotation actuating force is basically the same as the direction of the rotation of the second push rod caused by the effect of the traction piece.

A surge protective device disclosed by the present invention comprises a pedestal, a piezoresistor, a release support, a spring leaf, a pin 1 and a pin 2. The piezoresistor is equipped with an electrode 1 and an electrode 2, the pin 1 and the pin 2 are installed at the two sides of the pedestal, and the release support is in hinge joint with the pedestal. The electrode 2 protrudes, after the piezoresistor is installed on a shell, the electrode 1 and the pin 1 are connected, and the electrode 2 penetrates the shell. One end of the spring leaf is welded together with the electrode 2 via a fusible metal, and the other end is connected with the pin 2. The release support abuts against the spring leaf under the acting force of a spring. The surge protective device can release rapidly, effectively avoids the arc, wire drawing and combustion phenomena, and enables the safety to be improved.

A residual-current circuit breaker is provided. An operating mechanism comprises a mounting plate, a handle, an upper connecting rod, a middle connecting rod, a lower connecting rod, a rotating shaft, a U-shaped connecting rod, a lever, a trip, a lock catch, a trip rod, a drive connecting rod, a contact trip, and a first elastic part, wherein the handle, the upper connecting rod, the middle connecting rod, the lower connecting rod, the rotating shaft, the U-shaped connecting rod, the lever, the trip, the lock catch, the trip rod, the drive connecting rod, the contact trip, and the first elastic part are arranged between the mounting plate and a support. The advantage is that according to the above scheme, the trip is driven by a lever to operate in trip or switching off, the trip rod toggles the drive connecting rod, the contact trip operates to drive the rotating shaft to rotate, thereby achieving quickly tripping, being not affected by the handle, and improving product performance.

The invention relates to a photovoltaic direct-current co-current and counter-current bidirectional protection system, which is a direct-current circuit breaker specially researched and manufactured in order to meet the requirement of a photovoltaic system according to American UL489B standard as reference, wherein the American UL489B standard is stricter than standard of European Communities. The photovoltaic direct-current co-current and counter-current bidirectional protection system provided by the invention comprises a solar cell, photovoltaic modules and a photovoltaic series circuit, and is externally connected with a combiner box wire outgoing isolation electric appliance and an inverter direct-current side protection electric appliance.

The invention discloses a quick-connecting and self-locking connector assembly comprising a male end and a female end. The internal side of the female end is provided with an elastic jack which is formed by multiple wire springs through uniform arrangement. The male end can be closely plugged in the elastic jack of the female end. The end part of the male end is provided with a first buckle structure. The internal side wall of the female end is provided with a second buckle structure. The first and second buckle structures can be connected in a buckling way. The external side wall of the female end is also provided with a release switch. The first and second buckle structures can be released by the release switch. At least one of the first and second buckle structures is made of non-conductive material. When the male end is plugged in the female end, the first and second buckle structures automatically buckled to realize self-locking so that the male end can be prevented from being automatically unplugged by the influence of external pulling force in the use process, and the connection stability of the male end and the female end can be effectively guaranteed. The release switch is also arranged on the female end so that the first and second buckle structures are enabled to be quickly released and unplugging of the male end is facilitated. The quick-connecting and self-locking connector assembly is simple in structure and convenient to operate and can realize quick plugging and self-locking.

The invention discloses a thermo-magnetic protection device and an electric protection device of the thermo-magnetic protection device. The thermo-magnetic protection device comprises a wiring board, an adjusting screw, an armature, a bimetallic element, a magnet yoke, a counter-force spring and a strand line. The wiring board is fixed on a supporting body, the armature is hung on the magnet yoke and fixed through the counter-force spring, one end portion of the magnet yoke is clamped on the preset supporting body, the other end portion of the magnet yoke is elastically bent to enable a preset included angle a to be formed between the other end portion of the magnet yoke and the one end portion of the magnet yoke, the adjusting screw is connected to the one end portion of the magnet yoke in a screwed mode, and the tail end of the adjusting screw abuts against the other end portion, provided with the elastic force, of the magnet yoke, and therefore the preset included angle a is adjusted through the adjusting screw. The bimetallic element is arranged in the other end portion of the magnet yoke, the bimetallic element and the other end portion of the magnet yoke are fixed, and the bimetallic element is connected with the wiring board through the strand line. The thermo-magnetic protection device and the electric protection device of the thermo-magnetic protection device have the advantages of being simple in design, high in reliability, less in copper using quantity and low in manufacturing cost.

The invention discloses an electromagnetic release and electrical protection equipment comprising the same, and relates to the technical field of electromagnetic tripping devices. The electromagnetic release provided by the invention comprises a U-shaped magnet yoke, an armature, a permanent magnet and a reset spring, and further comprises an air gap maintaining device which is used for enabling an air gap between the permanent magnet and the armature to be a constant preset value when the armature is attached to the two polar surfaces of the magnet yoke end, when the armature is attached to the polar surfaces of the two branches of the magnet yoke through the air gap maintaining device, the air gap between the permanent magnet and the armature is constantly kept at a preset air gap value, so that the attraction force of the magnet to the armature is constant, the work of the electromagnetic release is reliable and stable, the balance moment of the reset spring and the magnet is conveniently and accurately designed, the moment balance of the reset elastic piece and the permanent magnet can be destroyed by adopting a small current, the scheme of the low-power electromagnetic release becomes possible, and the low-power electromagnetic release is suitable for low-power-consumption and low-current use working conditions.

An over-current protection device comprises two metal foils and a positive temperature coefficient (PTC) material layer. The PTC material layer is sandwiched between the two metal foils and has a volume resistivity below 0.1 Ω-cm. The PTC material layer includes (i) plural crystalline polymers having at least one crystalline polymer of a melting point less than 115° C.; (ii) an electrically conductive nickel filler having a volume resistivity less than 500 μΩ-cm; and (iii) a non-conductive metal nitride filler. The electrically conductive nickel filler and non-conductive metal nitride filler are dispersed in the crystalline polymer.

The invention provides an action mechanism of a residual current operated circuit breaker. The action mechanism comprises a tripping coil fixed on a base of the circuit breaker, a lever pivotally arranged on the base, an indicating part, a reset spring for driving the lever to rotate towards a reset direction and an energy storage spring for driving the indicating part to linearly move outwards, wherein the indicating part is arranged on the base in a linear motion manner; the lever comprises a lever body capable of pivoting around a pivot, a first arm, a second arm and a third arm; the first arm, the second arm and the third arm stretch outwards from the lever body respectively; the first arm is pushed by the tripping coil to rotate the lever towards a tripping direction; the second arm directly drives a tripping shaft of the circuit breaker to move to trip the circuit breaker; and the third arm is matched with the indicating part, is used for limiting motion of the indicating part and locking the indicating part at a stable position when leakage tripping is not generated, and is used for accelerating rotation of the lever and releasing locking of the indicating part by the lever when leakage tripping is generated. The action mechanism of the residual current operated circuit breaker has the beneficial effects that the action mechanism is sensitive to act, fast in tripping and easy to manufacture and assemble.

The protector for guiding against reverse connection of ground fault detector is mainly composed of circuit board, tripping resetting device, first pair of static contactor, second pair of static contactor, a pair of mobile contact rack, and control circuit. Characters are that: first pair of static contactor through conducting wire is connected to terminals of input power source; the mobile contact rack through junction device is connected to terminals of socket type load; being installed on lug plates of terminals of load, second pair of static contactor through control circuit makes the tripping resetting device operate so as to connect or disconnect power on loop between mobile contact rack and first/second pair of static contactor. When user connects power line to load end by accident, the detector cannot be reset. Thus, terminals of input power source and terminals of socket type load are not electrified so as to protect electrical appliance from damages, and personal safety.

The invention provides a pressing-riveting device for a bent water pipe, and a pressing system. The pressing-riveting device for the bent water pipe comprises a screw rod, a nut, a connection block, aconnection plate, a stop nut, a rotary shaft block, an inclined-surface press block, a movable chuck and a slide tongue assembly, wherein the slide tongue assembly comprises a slide tongue groove, aslide tongue, a slide tongue cover and a spring. The pressing system applies the pressing-riveting device for the bent water pipe, and further comprises a cylinder assembly, wherein the cylinder assembly comprises a cylinder installation seat, a cylinder and a cylinder connection head. The pressing system is capable of realizing rapid release for the movable chuck through the cylinder assembly, and further capable of rotating the movable chuck through the cylinder assembly to adjust an installation angle of the bent water pipe.