CN105225880A - A kind of anti-error isolating switch for 110kV electrical network - Google Patents
A kind of anti-error isolating switch for 110kV electrical network Download PDFInfo
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- CN105225880A CN105225880A CN201510674159.6A CN201510674159A CN105225880A CN 105225880 A CN105225880 A CN 105225880A CN 201510674159 A CN201510674159 A CN 201510674159A CN 105225880 A CN105225880 A CN 105225880A
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- moving knife
- cutter
- ground
- lock
- isolating switch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/04—Interlocking mechanisms
- H01H31/08—Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
- H01H2300/024—Avoid unwanted operation
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Abstract
A kind of anti-error isolating switch for 110kv electrical network, comprise switch frame, movable cutter mechanism, quiet cutter mechanism, ground cutter mechanism, moving knife electromagnetic mechanism, ground cutter electromagnetic mechanism, moving knife lock link gear, ground cutter lock link gear, and closing self-locking mechanism, movable cutter mechanism, quiet cutter mechanism, ground cutter mechanism is located on switch frame, moving knife electromagnetic mechanism is arranged in movable cutter mechanism for locking movable cutter mechanism, ground cutter electromagnetic mechanism is arranged on quiet cutter mechanism for locking ground cutter mechanism, moving knife lock link gear is connected on the ground cutter mechanism of the isolating switch of three-phase, ground cutter lock link gear is connected on the ground cutter mechanism of the isolating switch homonymy of three-phase, closing self-locking mechanism is located between the movable cutter mechanism of isolating switch and quiet cutter mechanism.Avoid personnel's misoperation, controller error signal on the impact of isolating switch safety, improve the fail safe of electrical network, avoid anti-error isolating switch malfunction for 110kv electrical network to the impact of personal safety.
Description
Technical field
The present invention relates to
a kind of anti-error isolating switch for 110kv electrical network.
Background technology
For the device for switching that the anti-error isolating switch of 110kv electrical network is important in power plant and transformer station's electrical system, need support the use with primary cut-out, its major function is: ensure High-Voltage Electrical Appliances and the safety of device when service work, play isolation voltage, can not with cut-out, drop into load current and cut-off short circuit current, only can be used for some handover operation not producing powerful electric arc, that is to say that it does not have arc-suppression function; Be divided into by infield difference, within doors formula outside formula and room, be divided into by insulation column number, open side type, queen post and three pillar type, each electric pressure has optional equipment.Anti-error isolating switch for 110kv electrical network ensure that High-Voltage Electrical Appliances and the safety of device when service work, play isolation voltage, can not with cut-out, drop into load current and cut-off short circuit current, only can be used for some handover operation not producing powerful electric arc, that is to say that it does not have arc-suppression function; Be divided into by infield difference, within doors formula outside formula and room, be divided into by insulation column number, open side type, queen post and three pillar type, each electric pressure has optional equipment.Also reliably can isolate needing in high voltage distribution installation the part had a power failure with live part, to ensure the safety of service work.Contact for the anti-error isolating switch of 110kv electrical network is all in atmosphere open, there is obvious cut-off point, isolating switch does not have arc-control device, therefore can not be used for cutting off load current or short circuit current, otherwise under High Pressure, cut-off point will produce strong electric arc, and be difficult to self-extinguish, even may cause arcing, scaling loss equipment, jeopardize personal safety, the serious accident that Here it is so-called " on-load draws isolating switch ".Anti-error isolating switch for 110kv electrical network can also be used to the handover operation carrying out some circuit, to change the operational mode of system.Such as: in double-bus circuit, with the anti-error isolating switch for 110kv electrical network, operating circuit can be switched to another bus from a bus.
Present isolating switch is frequently used in each transformer station, the action of isolating switch is generally carry out far distance controlled by control desk, anti-error isolating switch for 110kv electrical network can not this feature of on-load action, existing " five prevent " is although some safeguards have been done in measure, but due to misoperation, or the reason such as controller error signal, cause isolating switch most probably or be arranged on the ground cutter misoperation on isolating switch, cause serious danger, harm power grid security.
Summary of the invention
The object of the invention is to: for above-mentioned Problems existing, provide
a kind of anti-error isolating switch for 110kv electrical network, isolating switch arranges locking device, when avoiding because of control desk far distance controlled, produces
mistakesignal, is used in the anti-error isolating switch of 110kv electrical network
mistakeaction affects the fail safe of equipment, avoids personnel's misoperation, controller error signal on the impact of isolating switch safety, improves the fail safe of electrical network, avoids the anti-error isolating switch for 110kv electrical network
mistakeaction is on the impact of personal safety, and this locking device directly utilizes the electric current that the induction of coil produces, and without the need to other power supply, avoids the impact that electric power system normally uses this locking device.
The technical solution used in the present invention is as follows:
The invention discloses
a kind of anti-error isolating switch for 110kv electrical network, comprise switch frame, movable cutter mechanism, quiet cutter mechanism, ground cutter mechanism, moving knife electromagnetic mechanism, ground cutter electromagnetic mechanism, moving knife lock link gear, ground cutter lock link gear, and closing self-locking mechanism, movable cutter mechanism, quiet cutter mechanism, ground cutter mechanism is located on switch frame, moving knife electromagnetic mechanism is arranged in movable cutter mechanism for locking movable cutter mechanism, ground cutter electromagnetic mechanism is arranged on quiet cutter mechanism for locking ground cutter mechanism, moving knife lock link gear is connected on the ground cutter mechanism of the isolating switch of three-phase, ground cutter lock link gear is connected on the ground cutter mechanism of the isolating switch homonymy of three-phase, closing self-locking mechanism is located between the movable cutter mechanism of isolating switch and quiet cutter mechanism.
Further, movable cutter mechanism, comprises moving knife motor, moving knife post, moving knife bar; Moving knife post is vertically movably arranged in the middle part of switch frame or end, and moving knife bar is horizontally installed on the top of moving knife post, connects moving knife motor in the bottom of moving knife post; Quiet cutter mechanism, comprise quiet tool post and quiet cutter head, quiet tool post is vertically arranged at the end of switch frame, and quiet cutter head is positioned at the top of quiet tool post; Quiet cutter head is provided with moving knife interface and ground cutter interface.
Further, ground cutter mechanism, comprise ground knife bar, cutter shaft, cutter motor, ground knife bar by cutter shaft be connected on switch frame, ground knife bar can turn to vertical direction around ground cutter shaft by horizontal direction and be connected with ground cutter interface, ground cutter motor be located at cutter shaft place for knife bar rotationally;
Further, moving knife electromagnetic mechanism, comprise current sensor, electromagnetic lock and moving knife latch mechanism, current sensor is set on moving knife bar for responding to the electric current on moving knife bar, current sensor is provided with insulating barrier, electromagnetic lock is arranged at moving knife post upper end, coil in current sensor secondary side and electromagnetic lock is connected to closed-loop path, the dead bolt of electromagnetic lock connects the upper end of moving knife latch mechanism, the lower end of this moving knife latch mechanism is connected to the portion of moving knife bar, and moving knife latch mechanism is for locking the disconnection action of moving knife bar;
Further, ground cutter electromagnetic mechanism, comprise voltage sensor, electromagnetic lock and ground cutter latch mechanism, voltage sensor and electromagnetic lock are all positioned at Jing Daotouchu, coil in the secondary side of voltage sensor and electromagnetic lock is connected to closed-loop path, the dead bolt of electromagnetic lock is connected with cutter latch mechanism upper end, ground, and the lower end of ground cutter latch mechanism is connected to cutter shaft place, ground for the closed action by locking ground cutter;
Further, moving knife lock link gear, is connected the moving knife latch mechanism of arranged side by side three isolating switches by moving knife connecting rod, enables its moving knife latch mechanism lock simultaneously or unlock; Ground cutter lock link gear, is connected the ground cutter latch mechanism of arranged side by side three isolating switches by ground cutter connecting rod, enables its ground cutter latch mechanism lock simultaneously or unlock; Closing self-locking mechanism, comprise self-lock rod, self-fastening button, self-lock rod two ends are respectively provided with a self-fastening button, the self-fastening button of one end is located at moving knife post bottom, the self-fastening button of the other end is located at ground cutter buckle, this self-locking mechanism, for locking ground cutter mechanism or movable cutter mechanism, makes ground cutter mechanism and movable cutter mechanism close simultaneously.
Due to said structure, effectively can improve the fail safe of isolating switch, adopt the mode of mechanical latching, ensure that the fail safe of isolating-switch locking, the possibility of isolating switch misoperation can be effectively reduced, by locking isolating switch, misoperation can be avoided and the loss of the person caused or property, prevent from, because being isolating switch action when the fault of control circuit or error signal occur, avoiding the situation causing electrical network ground connection to occur.
Further, the locking system of isolating switch, comprising:
Moving knife lock cell, comprises moving knife post, the long moving knife bar of 4m-4.5m, current sensor, electromagnetic lock and moving knife latch mechanism that 10kw-15kw moving knife motor, 2m-2.2m are long, moving knife post is movably connected on switch frame, moving knife bar is horizontally installed on the top of moving knife post, moving knife motor is connected in the bottom of moving knife post, this moving knife electric machine rotation drives moving knife post to rotate, the rotating speed ratio of moving knife motor rotation speed and moving knife post is 300-350, and the rotational angle of moving knife post is 0-95 degree, current sensor is set on moving knife bar, induced current when moving knife bar is charged in current sensor is not less than 30A, current sensor is provided with insulating barrier, the linen-cotton layer of insulating barrier to be the thickness comprised as nexine be 3-4mm, thickness as middle level is the plastic layer of 5-8mm, the ceramic layer of 1cm is greater than as outer field thickness, electromagnetic lock is arranged on moving knife post upper end, coil in current sensor secondary side and electromagnetic lock is connected to closed-loop path, induced current makes electromagnetic lock action, the dead bolt of its electromagnetic lock produces pulling force or the thrust of 50N-70N, ceramic layer is had in the outer wrap of electromagnetic lock, the dead bolt of electromagnetic lock connects the upper end of moving knife latch mechanism, the lower end of this moving knife latch mechanism is connected to moving knife bar bottom, moving knife latch mechanism is for locking the disconnection action of moving knife bar, the resistance that moving knife locks lower two ends is greater than 1500M Ω and the distance at its upper and lower two ends is greater than 1.8m,
Ground cutter lock cell, comprise ground knife bar, cutter shaft, cutter motor, quiet tool post, quiet cutter head, voltage sensor, electromagnetic lock and ground cutter latch mechanism, ground knife bar is connected on switch frame by ground cutter shaft, ground knife bar can turn to vertical direction around ground cutter shaft by horizontal direction and be connected with the ground cutter interface on quiet cutter head, the height of quiet cutter head is 1.9m-2.1m, the distance of the distance moving knife post of quiet tool post is 2-2.2m, moving knife interface on quiet cutter head and moving knife bar contour, match with moving knife interface in the end of moving knife bar, power be the ground cutter motor of 30kw-35kw be located at cutter shaft place, ground and ground cutter motor for knife bar rotationally, the rotating shaft of this ground cutter motor is 310-330 with the rotating ratio of ground cutter, the length of ground knife bar is 2m-2.2m, on ground knife bar, cover has the electro-insulating rubber layer of black, and ground knife bar is 0-92 degree around the rotational angle of ground cutter shaft, voltage sensor is provided with in quiet tool post upper end, coil in the secondary side of this voltage sensor and electromagnetic lock is connected to closed-loop path, voltage sensor can detect the voltage of Jing Daotouchu and in its second siding ring, produce the induced current of 50A-60A, after this induced current enters electromagnetic lock, coil in electromagnetic lock is charged, the iron core of electromagnetic lock produces electromagnetic force, electromagnetic force pulls or promotes the dead bolt action of electromagnetic lock, dead bolt connects the upper end of ground cutter latch mechanism, the action of locking ground, the lower end cutter of this ground cutter latch mechanism, ground cutter mechanism is locked onto on switch frame, the resistance at these upper and lower two ends of cutter latch mechanism, ground is greater than 2000M Ω and the distance at its upper and lower two ends is greater than 1.8m,
Interlocking unit, comprise some moving knife connecting rods, cutter connecting rod, self-lock rod and self-fastening button; Connect with moving knife connecting rod between the moving knife latch mechanism of the isolating switch of three-phase, moving knife connecting rod and moving knife lock the triangle mechanism of composition more than three, and this leg-of-mutton each limit length of side is all not less than 50cm; This moving knife connecting rod can make moving knife latch mechanism lock simultaneously or unlock moving knife post, enables the moving knife post action simultaneously of isolating switch; Connected by ground cutter connecting rod between the ground cutter latch mechanism of the isolating switch of three-phase, this ground cutter connecting rod is connected to cutter shaft place, ground and by the ground cutter shaft series connection of the isolating switch homonymy of three-phase, ground cutter connecting rod is fixed by flat key and ground cutter shaft; The switch frame of isolating switch is horizontally arranged with self-lock rod, a self-fastening button is respectively flexibly connected at the two ends of self-lock rod, the self-fastening button of its one end is located at moving knife post bottom for moving knife post is fixed to switch frame, the self-fastening button of the other end is located at cutter shaft place, ground for locking ground cutter shaft action, and this makes ground cutter mechanism and movable cutter mechanism close simultaneously.
Due to said system, can by the unit modularization of isolating switch, both mutually
independentinterrelated again, can effectively avoid between unit
mistakethe chain reaction that action causes, enables isolating switch effectively coordinate, thus the running enabling isolating switch good, non-interference, coordinate between two again, improve fail safe and the locking security of device.In addition, the Rational Parameters that unit uses, both met
countrypower grid security regulation, the feature of the isolating switch fail safe of optimization can be reached again.
Further, the control method of this isolating switch:
(1), isolating switch is when normally working, and current sensor senses electric current on moving knife bar, and now, produce the induced current of 30A-40A in the secondary coil of current sensor, induced current acts on electromagnetic lock through wire; In electromagnetic lock, to power on stream at electric current line of induction astragal;
(2), the induced current of 30A-40A makes the coil in electromagnetic lock charged, and the magnetic flux density that the iron core that coil is wound around produces is 500T-600T; Make the action of moving knife dead bolt thus lock this moving knife unit to complete disconnection action;
(3), behind iron core band magnetic field, under magneticaction, pull or promote the dead bolt of electromagnetic lock, dead bolt is subject to pulling force or the thrust of 50N-70N;
(4), dead bolt pulls or promotes moving knife latch mechanism and rise or decline, and the distance of its movement is greater than 3cm, and moving knife post to lock onto on switch frame and is locked as closure state by the lower end of movable cutter mechanism;
(5), after the electric current on isolating switch is disconnected, induced current on current sensor disappears, influence electricity flows in electromagnetic lock, electromagnetic lock power-off, the dead bolt of electromagnetic lock is under the elastic force effect of its spring 20-30N, dead bolt resets to unlocked position, and dead bolt promotes or pulls moving knife latch mechanism to move and unlock moving knife post simultaneously.
(6), the moving knife bar of this isolating switch is when being in service position or open position, and voltage sensor senses with the alternating voltage being over the ground greater than 10kv on quiet cutter head, forms the induced current of 10A-20A at the secondary side of voltage sensor;
(7), after induced current enters electromagnetic lock, flow through the coil in electromagnetic lock and produce magnetic field on coil, this magnetic field is by being conducted by the iron core of coil winding, and the magnetic flux density now on iron core is 300T-450T; Magnetic force on iron core will pull or promote the dead bolt action of electromagnetic lock;
(8), dead bolt has acted on pulling force or the thrust of 30-40N to the ground cutter latch mechanism be connected on dead bolt; Ground cutter latch mechanism moves up or down under the effect of pulling force or thrust, and the distance of its movement is greater than 5cm;
(9), the lower end of cutter latch mechanism the action of moving knife post is locked, or the lower end of ground cutter latch mechanism makes moving knife post be locked as off-state by link gear;
(10), when voltage drop on the quiet cutter head of isolating switch is low to moderate the magnitude of voltage allowing to close ground cutter, voltage sensor cannot sense that the alternating voltage over the ground on quiet cutter head or the voltage to earth on its quiet cutter head meet the requirement of closed ground cutter, the secondary side induced current of voltage sensor disappears or reduces, the magnetic flux density of electromagnetic lock interior loop reduces, iron core is to the pulling force of dead bolt or the thrust elastic force lower than dead bolt back-moving spring, the size of this elastic force is 15N-20N, dead bolt resets under the elastic force effect of back-moving spring, dead bolt drives ground cutter latch mechanism action, the lower end cutter shaft unblock over the ground of ground cutter latch mechanism.
(11), when the moving knife post of movable cutter mechanism needs rotational action, the electric current on isolating switch is controlled to fall zero, moving knife latch mechanism on three-phase isolation switch unlocks, three moving knife latch mechanisms under the effect of moving knife connecting rod simultaneously on move or move down, the triangular structure that its moving knife connecting rod and moving knife latch mechanism form can strengthen the degree of stability of its structure, makes the isolating switch of three-phase unlock simultaneously or lock;
(12), when the moving knife post of isolating switch turns to open position, moving knife post pulls the self-fastening button being located at moving knife post lower end, and self-fastening button is to the pulling force of self-lock rod effect 50N-80N or thrust; The self-lock rod other end be located at ground cutter shaft place at pulling force or push away
power certainlysnap close moves, and cutter shaft unlocks over the ground;
(13), interlocking unit and ground cutter lock cell are after cutter shaft unlocks all over the ground, when the ground cutter of three-phase isolation switch needs closed action, the ground knife bar of three-phase upwards rotates under the effect of ground cutter connecting rod simultaneously, until cutter upper end, ground is connected with the ground cutter interface on quiet cutter head;
(14) when cutter is close to closure state, the self-fastening button action of cutter lower end, ground pulls with the power of 50N-80N or promotes self-lock rod, be positioned at self-fastening button action under the pulling force of self-lock rod or the effect of thrust of moving knife post lower end, isolating switch is locked as off-state by the self-fastening button of moving knife post lower end;
(15) when, local knife bar is positioned at open position, in isolating switch closing course, isolating switch drives the self-fastening button action below it, self-fastening button makes self-lock rod action with the pulling force of 50N-80N or thrust, be positioned at the self-fastening button below ground cutter shaft, ground knife bar is locked as off-state, and side by side cutter lock cell detects with alternating voltage over the ground on quiet cutter head, and ground cutter shaft locks by moving knife lock cell further.
Owing to have employed said method, due to said method, circuit length and the complexity of lock cell can be reduced, avoid circuit long and cause
mistakesignal or reduce the impact of fail safe of circuit complexity on the requirement connected or lock cell, its circuit is just converted to actuating mechanism above moving knife post, when avoiding electric current to transmit downwards, cause because insulating properties is bad that Keep Clear-High Voltage or the danger of ground connection, enable electromagnetic mechanism action rapidly simultaneously, improve the accuracy of electromagnetic lock mechanism, avoid
mistakesignal causes
mistakeunlock or lock out action.The alternate integrating action of isolating switch can be realized, realize the mechanical latching between the moving knife of isolating switch and ground cutter simultaneously, effectively prevent moving knife and the ground cutter closed potential safety hazard caused simultaneously, effectively can improve alternate fail safe and the uniformity of isolating switch, strengthen the fail safe of electrical network simultaneously.The alternate integrating action of isolating switch can be realized, realize the mechanical latching between the moving knife of isolating switch and ground cutter simultaneously, effectively prevent moving knife and the ground cutter closed potential safety hazard caused simultaneously, effectively can improve alternate fail safe and the uniformity of isolating switch, strengthen the fail safe of electrical network simultaneously.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, the locking device structure of this isolating switch is simple, easy for installation, with low cost, is easy to repacking; This design in addition, can by the movable cutter mechanism of isolating switch, cutter mechanism realize safety locking, avoid belt current disconnect ground cutter, charged closed ground cutter situation generation.The side by side safety interlock of cutter mechanism and movable cutter mechanism, both guarantees cannot close simultaneously.
2, the defect of existing isolating switch design filled up by this locking device, enhances the security performance of isolating switch; Simplify the control circuit of locking device, avoid circuit long or cross auxiliary and potential safety hazard that is that cause, adopt mechanical mechanism more reliably, effectively avoid control circuit power-off, the situation causing isolating switch to protect occurs.
3, the locking device of this isolating switch avoid because of
mistakesignal or
mistakeoperation, and the generation of the situation of the equipment caused, the person, power grid accident.
4, the locking device of this isolating switch is simple, so that the isolated switchgear installed to be reequiped, can have good easy generalization.
5, this locking device is simple with circuit structure, and circuit is short, avoids the impact of long distance signal transmission on signaling security.
6, this locking means, exquisite composition, can ensure isolating switch greatly not because misoperation or error signal affect electric network security.
Accompanying drawing explanation
fig. 1it is the anti-error isolating switch structure for 110kv electrical network in the present invention
figure;
in figuremark: 1-switch frame, 2-ground cutter mechanism, 21-ground knife bar, 22-ground cutter shaft, 23-ground cutter electromagnetic mechanism, 24-ground cutter dead bolt, the quiet cutter mechanism of 3-, the quiet tool post of 31-, 32-voltage sensor, the quiet cutter head of 33-, 4-movable cutter mechanism, 41-moving knife bar, 42-moving knife post, 43-current sensor, 44-moving knife electromagnetic mechanism, 45-moving knife dead bolt, 46-moving knife motor.
Embodiment
Below in conjunction with
accompanying drawing, the present invention is described in detail.
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with
accompanying drawingand embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
specific embodiment 1:
as Fig. 1shown in,
The invention discloses
a kind of anti-error isolating switch for 110kv electrical network, comprise switch frame 1, movable cutter mechanism 4, quiet cutter mechanism 3, ground cutter mechanism 2, moving knife electromagnetic mechanism 44, ground cutter electromagnetic mechanism 23, moving knife lock link gear, ground cutter lock link gear, and closing self-locking mechanism, movable cutter mechanism 4, quiet cutter mechanism 3, ground cutter mechanism 2 is located on switch frame 1, moving knife electromagnetic mechanism 44 is arranged in movable cutter mechanism 4 for locking movable cutter mechanism 4, ground cutter electromagnetic mechanism 23 is arranged on quiet cutter mechanism 3 for locking ground cutter mechanism 2, moving knife lock link gear is connected on the ground cutter mechanism 2 of the isolating switch of three-phase, ground cutter lock link gear is connected on the ground cutter mechanism 2 of the isolating switch homonymy of three-phase, closing self-locking mechanism is located between the movable cutter mechanism 4 of isolating switch and quiet cutter mechanism 3.
Movable cutter mechanism 4, comprises moving knife motor 46, moving knife post 42, moving knife bar 41; Moving knife post 42 is vertically movably arranged in the middle part of switch frame 1 or end, and moving knife bar 41 is horizontally installed on the top of moving knife post 42, connects moving knife motor 46 in the bottom of moving knife post 42; Quiet cutter mechanism 3, comprise quiet tool post 31 and quiet cutter head 33, quiet tool post 31 is vertically arranged at the end of switch frame 1, and quiet cutter head 33 is positioned at the top of quiet tool post 31; Quiet cutter head 33 is provided with moving knife interface and ground cutter interface.
Ground cutter mechanism 2, comprise ground knife bar 21, cutter shaft 22, cutter motor, ground knife bar 21 is connected on switch frame 1 by ground cutter shaft 22, ground knife bar 21 can turn to vertical direction around ground cutter shaft 22 by horizontal direction and be connected with ground cutter interface, ground cutter motor be located at cutter shaft 22 place for knife bar 21 rotationally;
Moving knife electromagnetic mechanism 44, comprise current sensor 43, electromagnetic lock and moving knife latch mechanism, current sensor 43 is set on moving knife bar 41 for responding to the electric current on moving knife bar 41, current sensor 43 is provided with insulating barrier, electromagnetic lock is arranged at moving knife post 42 upper end, coil in current sensor 43 secondary side and electromagnetic lock is connected to closed-loop path, the dead bolt of electromagnetic lock connects the upper end of moving knife latch mechanism, the lower end of this moving knife latch mechanism is connected to the portion of moving knife bar 41, and moving knife latch mechanism is for locking the disconnection action of moving knife bar 41;
Ground cutter electromagnetic mechanism 23, comprise voltage sensor 32, electromagnetic lock and ground cutter latch mechanism, voltage sensor 32 and electromagnetic lock are all positioned at quiet cutter head 33 place, coil in the secondary side of voltage sensor 32 and electromagnetic lock is connected to closed-loop path, the dead bolt of electromagnetic lock is connected with cutter latch mechanism upper end, ground, and the lower end of ground cutter latch mechanism is connected to cutter shaft 22 place, ground for the closed action by locking ground cutter;
Moving knife lock link gear, is connected the moving knife latch mechanism of arranged side by side three isolating switches by moving knife connecting rod, enables its moving knife latch mechanism lock simultaneously or unlock; Ground cutter lock link gear, is connected the ground cutter latch mechanism of arranged side by side three isolating switches by ground cutter connecting rod, enables its ground cutter latch mechanism lock simultaneously or unlock; Closing self-locking mechanism, comprise self-lock rod, self-fastening button, self-lock rod two ends are respectively provided with a self-fastening button, the self-fastening button of one end is located at moving knife post 42 bottom, the self-fastening button of the other end is located at ground cutter buckle, this self-locking mechanism, for locking ground cutter mechanism 2 or movable cutter mechanism 4, makes ground cutter mechanism 2 and movable cutter mechanism 4 close simultaneously.
Due to said structure, effectively can improve the fail safe of isolating switch, adopt the mode of mechanical latching, ensure that the fail safe of isolating-switch locking, the possibility of isolating switch misoperation can be effectively reduced, by locking isolating switch, misoperation can be avoided and the loss of the person caused or property, prevent from, because being isolating switch action when the fault of control circuit or error signal occur, avoiding the situation causing electrical network ground connection to occur.
specific embodiment 2:
Based on the locking system of enforcement 1 isolating switch, comprising:
Moving knife lock cell, comprises moving knife post 42, the long moving knife bar 41 of 4m-4.5m, current sensor 43, electromagnetic lock and moving knife latch mechanism that 10kw-15kw moving knife motor 46,2m-2.2m are long, moving knife post 42 is movably connected on switch frame 1, moving knife bar 41 is horizontally installed on the top of moving knife post 42, moving knife motor 46 is connected in the bottom of moving knife post 42, this moving knife motor 46 rotates and drives moving knife post 42 to rotate, the rotating speed ratio of moving knife motor 46 velocity of rotation and moving knife post 42 is 300-350, and the rotational angle of moving knife post 42 is 0-95 degree, current sensor 43 is set on moving knife bar 41, induced current when moving knife bar 41 is charged in current sensor 43 is not less than 30A, current sensor 43 is provided with insulating barrier, the linen-cotton layer of insulating barrier to be the thickness comprised as nexine be 3-4mm, thickness as middle level is the plastic layer of 5-8mm, the ceramic layer of 1cm is greater than as outer field thickness, electromagnetic lock is arranged on moving knife post 42 upper end, coil in current sensor 43 secondary side and electromagnetic lock is connected to closed-loop path, induced current makes electromagnetic lock action, the dead bolt of its electromagnetic lock produces pulling force or the thrust of 50N-70N, ceramic layer is had in the outer wrap of electromagnetic lock, the dead bolt of electromagnetic lock connects the upper end of moving knife latch mechanism, the lower end of this moving knife latch mechanism is connected to moving knife bar 41 bottom, moving knife latch mechanism is for locking the disconnection action of moving knife bar 41, the resistance that moving knife locks lower two ends is greater than 1500M Ω and the distance at its upper and lower two ends is greater than 1.8m,
Ground cutter lock cell, comprise ground knife bar 21, cutter shaft 22, cutter motor, quiet tool post 31, quiet cutter head 33, voltage sensor 32, electromagnetic lock and ground cutter latch mechanism, ground knife bar 21 is connected on switch frame 1 by ground cutter shaft 22, ground knife bar 21 can turn to vertical direction around ground cutter shaft 22 by horizontal direction and be connected with the ground cutter interface on quiet cutter head 33, the height of quiet cutter head 33 is 1.9m-2.1m, the distance of the distance moving knife post 42 of quiet tool post 31 is 2-2.2m, moving knife interface on quiet cutter head 33 and moving knife bar 41 contour, match with moving knife interface in the end of moving knife bar 41, power be the ground cutter motor of 30kw-35kw be located at cutter shaft 22 place, ground and ground cutter motor for knife bar 21 rotationally, the rotating shaft of this ground cutter motor is 310-330 with the rotating ratio of ground cutter, the length of ground knife bar 21 is 2m-2.2m, on ground knife bar 21, cover has the electro-insulating rubber layer of black, and ground knife bar 21 is 0-92 degree around the rotational angle of ground cutter shaft 22, voltage sensor 32 is provided with in quiet tool post 31 upper end, coil in the secondary side of this voltage sensor 32 and electromagnetic lock is connected to closed-loop path, voltage sensor 32 can detect the voltage at quiet cutter head 33 place and in its second siding ring, produce the induced current of 50A-60A, after this induced current enters electromagnetic lock, coil in electromagnetic lock is charged, the iron core of electromagnetic lock produces electromagnetic force, electromagnetic force pulls or promotes the dead bolt action of electromagnetic lock, dead bolt connects the upper end of ground cutter latch mechanism, the action of locking ground, the lower end cutter of this ground cutter latch mechanism, ground cutter mechanism 2 is locked onto on switch frame 1, the resistance at these upper and lower two ends of cutter latch mechanism, ground is greater than 2000M Ω and the distance at its upper and lower two ends is greater than 1.8m,
Interlocking unit, comprise some moving knife connecting rods, cutter connecting rod, self-lock rod and self-fastening button; Connect with moving knife connecting rod between the moving knife latch mechanism of the isolating switch of three-phase, moving knife connecting rod and moving knife lock the triangle mechanism of composition more than three, and this leg-of-mutton each limit length of side is all not less than 50cm; This moving knife connecting rod can make moving knife latch mechanism lock simultaneously or unlock moving knife post 42, makes the moving knife post 42 of isolating switch can simultaneously action; Connected by ground cutter connecting rod between the ground cutter latch mechanism of the isolating switch of three-phase, this ground cutter connecting rod is connected to cutter shaft 22 place, ground and is connected by the ground cutter shaft 22 of the isolating switch homonymy of three-phase, and ground cutter connecting rod is fixed by flat key and ground cutter shaft 22; The switch frame 1 of isolating switch is horizontally arranged with self-lock rod, a self-fastening button is respectively flexibly connected at the two ends of self-lock rod, the self-fastening button of its one end is located at moving knife post 42 bottom for moving knife post 42 is fixed to switch frame 1, the self-fastening button of the other end is located at cutter shaft 22 place, ground for locking ground cutter shaft 22 action, and this makes ground cutter mechanism 2 and movable cutter mechanism 4 close simultaneously.
Due to said system, can by the unit modularization of isolating switch, both mutually
independentinterrelated again, can effectively avoid between unit
mistakethe chain reaction that action causes, enables isolating switch effectively coordinate, thus the running enabling isolating switch good, non-interference, coordinate between two again, improve fail safe and the locking security of device.In addition, the Rational Parameters that unit uses, both met
countrypower grid security regulation, the feature of the isolating switch fail safe of optimization can be reached again.
specific embodiment 3:
Based on the locking system of embodiment 2 isolating switch, the control method of isolating switch:
(1), isolating switch is when normally working, and current sensor 43 senses electric current on moving knife bar 41, and now, produce the induced current of 30A-40A in the secondary coil of current sensor 43, induced current acts on electromagnetic lock through wire; In electromagnetic lock, to power on stream at electric current line of induction astragal;
(2), the induced current of 30A-40A makes the coil in electromagnetic lock charged, and the magnetic flux density that the iron core that coil is wound around produces is 500T-600T; Make the action of moving knife dead bolt thus lock this moving knife unit to complete disconnection action;
(3), behind iron core band magnetic field, under magneticaction, pull or promote the dead bolt of electromagnetic lock, dead bolt is subject to pulling force or the thrust of 50N-70N;
(4), dead bolt pulls or promotes moving knife latch mechanism and rise or decline, and the distance of its movement is greater than 3cm, and moving knife post 42 to lock onto on switch frame 1 and is locked as closure state by the lower end of movable cutter mechanism 4;
(5), after the electric current on isolating switch is disconnected, induced current on current sensor 43 disappears, influence electricity flows in electromagnetic lock, electromagnetic lock power-off, the dead bolt of electromagnetic lock is under the elastic force effect of its spring 20-30N, dead bolt resets to unlocked position, and dead bolt promotes or pulls moving knife latch mechanism to move and unlock moving knife post 42 simultaneously.
(6), the moving knife bar 41 of this isolating switch is when being in service position or open position, and voltage sensor 32 senses with the alternating voltage being over the ground greater than 10kv on quiet cutter head 33, forms the induced current of 10A-20A at the secondary side of voltage sensor 32;
(7), after induced current enters electromagnetic lock, flow through the coil in electromagnetic lock and produce magnetic field on coil, this magnetic field is by being conducted by the iron core of coil winding, and the magnetic flux density now on iron core is 300T-450T; Magnetic force on iron core will pull or promote the dead bolt action of electromagnetic lock;
(8), dead bolt has acted on pulling force or the thrust of 30-40N to the ground cutter latch mechanism be connected on dead bolt; Ground cutter latch mechanism moves up or down under the effect of pulling force or thrust, and the distance of its movement is greater than 5cm;
(9), the lower end of cutter latch mechanism the action of moving knife post 42 is locked, or the lower end of ground cutter latch mechanism makes moving knife post 42 be locked as off-state by link gear;
(10), when voltage drop on the quiet cutter head 33 of isolating switch is low to moderate the magnitude of voltage allowing to close ground cutter, voltage sensor 32 cannot sense that the alternating voltage over the ground on quiet cutter head 33 or the voltage to earth on its quiet cutter head 33 meet the requirement of closed ground cutter, the secondary side induced current of voltage sensor 32 disappears or reduces, the magnetic flux density of electromagnetic lock interior loop reduces, iron core is to the pulling force of dead bolt or the thrust elastic force lower than dead bolt back-moving spring, the size of this elastic force is 15N-20N, dead bolt resets under the elastic force effect of back-moving spring, dead bolt drives ground cutter latch mechanism action, the lower end of ground cutter latch mechanism over the ground cutter shaft 22 unlocks.
(11), when the moving knife post 42 of movable cutter mechanism 4 needs rotational action, the electric current on isolating switch is controlled to fall zero, moving knife latch mechanism on three-phase isolation switch unlocks, three moving knife latch mechanisms under the effect of moving knife connecting rod simultaneously on move or move down, the triangular structure that its moving knife connecting rod and moving knife latch mechanism form can strengthen the degree of stability of its structure, makes the isolating switch of three-phase unlock simultaneously or lock;
(12), when the moving knife post 42 of isolating switch turns to open position, moving knife post 42 pulls the self-fastening button being located at moving knife post 42 lower end, and self-fastening button is to the pulling force of self-lock rod effect 50N-80N or thrust; The self-lock rod other end be located at ground cutter shaft 22 place at pulling force or push away
power certainlysnap close moves, and cutter shaft 22 unlocks over the ground;
(13), interlocking unit and ground cutter lock cell are after cutter shaft 22 unlocks all over the ground, when the ground cutter of three-phase isolation switch needs closed action, the ground knife bar 21 of three-phase upwards rotates under the effect of ground cutter connecting rod simultaneously, until cutter upper end, ground is connected with the ground cutter interface on quiet cutter head 33;
(14) when cutter is close to closure state, the self-fastening button action of cutter lower end, ground pulls with the power of 50N-80N or promotes self-lock rod, be positioned at self-fastening button action under the pulling force of self-lock rod or the effect of thrust of moving knife post 42 lower end, isolating switch is locked as off-state by the self-fastening button of moving knife post 42 lower end;
(15) when, local knife bar 21 is positioned at open position, in isolating switch closing course, isolating switch drives the self-fastening button action below it, self-fastening button makes self-lock rod action with the pulling force of 50N-80N or thrust, be positioned at the self-fastening button below ground cutter shaft 22, ground knife bar 21 is locked as off-state, and side by side cutter lock cell detects with alternating voltage over the ground on quiet cutter head 33, and ground cutter shaft 22 locks by moving knife lock cell further.
Owing to have employed said method, due to said method, circuit length and the complexity of lock cell can be reduced, avoid circuit long and cause
mistakesignal or reduce the impact of fail safe of circuit complexity on the requirement connected or lock cell, its circuit is just converted to actuating mechanism above moving knife post 42, when avoiding electric current to transmit downwards, cause because insulating properties is bad that Keep Clear-High Voltage or the danger of ground connection, enable electromagnetic mechanism action rapidly simultaneously, improve the accuracy of electromagnetic lock mechanism, avoid
mistakesignal causes
mistakeunlock or lock out action.The alternate integrating action of isolating switch can be realized, realize the mechanical latching between the moving knife of isolating switch and ground cutter simultaneously, effectively prevent moving knife and the ground cutter closed potential safety hazard caused simultaneously, effectively can improve alternate fail safe and the uniformity of isolating switch, strengthen the fail safe of electrical network simultaneously.The alternate integrating action of isolating switch can be realized, realize the mechanical latching between the moving knife of isolating switch and ground cutter simultaneously, effectively prevent moving knife and the ground cutter closed potential safety hazard caused simultaneously, effectively can improve alternate fail safe and the uniformity of isolating switch, strengthen the fail safe of electrical network simultaneously.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1. the locking device structure of this isolating switch is simple, easy for installation, with low cost, is easy to repacking; This design in addition, can by the movable cutter mechanism 4 of isolating switch, cutter mechanism 2 realize safety locking, avoid belt current disconnect ground cutter, charged closed ground cutter situation generation.The side by side safety interlock of cutter mechanism 2 and movable cutter mechanism 4, both guarantees cannot close simultaneously.
2. the defect of existing isolating switch design filled up by this locking device, enhances the security performance of isolating switch; Simplify the control circuit of locking device, avoid circuit long or cross auxiliary and potential safety hazard that is that cause, adopt mechanical mechanism more reliably, effectively avoid control circuit power-off, the situation causing isolating switch to protect occurs.
3. the locking device of this isolating switch avoid because of
mistakesignal or
mistakeoperation, and the generation of the situation of the equipment caused, the person, power grid accident.
4. the locking device of this isolating switch is simple, so that the isolated switchgear installed to be reequiped, can have good easy generalization.
5. this locking device is simple with circuit structure, and circuit is short, avoids the impact of long distance signal transmission on signaling security.
6. this locking means, exquisite composition, can ensure isolating switch greatly not because misoperation or error signal affect electric network security.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the anti-error isolating switch for 110kv electrical network, it is characterized in that, comprise switch frame, movable cutter mechanism, quiet cutter mechanism, ground cutter mechanism, moving knife electromagnetic mechanism, ground cutter electromagnetic mechanism, moving knife lock link gear, ground cutter lock link gear, and closing self-locking mechanism, movable cutter mechanism, quiet cutter mechanism, ground cutter mechanism is located on switch frame, moving knife electromagnetic mechanism is arranged in movable cutter mechanism for locking movable cutter mechanism, ground cutter electromagnetic mechanism is arranged on quiet cutter mechanism for locking ground cutter mechanism, moving knife lock link gear is connected on the ground cutter mechanism of the isolating switch of three-phase, ground cutter lock link gear is connected on the ground cutter mechanism of the isolating switch homonymy of three-phase, closing self-locking mechanism is located between the movable cutter mechanism of isolating switch and quiet cutter mechanism.
2. the anti-error isolating switch for 110kv electrical network according to claim 1, is characterized in that, movable cutter mechanism, comprises moving knife motor, moving knife post, moving knife bar; Moving knife post is vertically movably arranged in the middle part of switch frame or end, and moving knife bar is horizontally installed on the top of moving knife post, connects moving knife motor in the bottom of moving knife post; Quiet cutter mechanism, comprise quiet tool post and quiet cutter head, quiet tool post is vertically arranged at the end of switch frame, and quiet cutter head is positioned at the top of quiet tool post; Quiet cutter head is provided with moving knife interface and ground cutter interface.
3. the anti-error isolating switch for 110kv electrical network according to claim 2, it is characterized in that, ground cutter mechanism, comprise ground knife bar, cutter shaft, cutter motor, ground knife bar is connected on switch frame by ground cutter shaft, ground knife bar can turn to vertical direction around ground cutter shaft by horizontal direction and be connected with ground cutter interface, ground cutter motor be located at cutter shaft place for knife bar rotationally.
4. the anti-error isolating switch for 110kv electrical network according to claim 3, it is characterized in that, moving knife electromagnetic mechanism, comprise current sensor, electromagnetic lock, and moving knife latch mechanism, current sensor is set on moving knife bar for responding to the electric current on moving knife bar, current sensor is provided with insulating barrier, electromagnetic lock is arranged at moving knife post upper end, coil in current sensor secondary side and electromagnetic lock is connected to closed-loop path, the dead bolt of electromagnetic lock connects the upper end of moving knife latch mechanism, the lower end of this moving knife latch mechanism is connected to the portion of moving knife bar, moving knife latch mechanism is for locking the disconnection action of moving knife bar.
5. the anti-error isolating switch for 110kv electrical network according to claim 4, it is characterized in that, ground cutter electromagnetic mechanism, comprise voltage sensor, electromagnetic lock and ground cutter latch mechanism, voltage sensor and electromagnetic lock are all positioned at Jing Daotouchu, coil in the secondary side of voltage sensor and electromagnetic lock is connected to closed-loop path, and the dead bolt of electromagnetic lock is connected with cutter latch mechanism upper end, ground, and the lower end of ground cutter latch mechanism is connected to cutter shaft place, ground for the closed action by locking ground cutter.
6. the anti-error isolating switch for 110kv electrical network according to claim 5, is characterized in that, moving knife lock link gear, is connected the moving knife latch mechanism of arranged side by side three isolating switches by moving knife connecting rod, enable its moving knife latch mechanism lock simultaneously or unlock; Ground cutter lock link gear, is connected the ground cutter latch mechanism of arranged side by side three isolating switches by ground cutter connecting rod, enables its ground cutter latch mechanism lock simultaneously or unlock; Closing self-locking mechanism, comprise self-lock rod, self-fastening button, self-lock rod two ends are respectively provided with a self-fastening button, the self-fastening button of one end is located at moving knife post bottom, the self-fastening button of the other end is located at ground cutter buckle, this self-locking mechanism, for locking ground cutter mechanism or movable cutter mechanism, makes ground cutter mechanism and movable cutter mechanism close simultaneously.
7. the anti-error isolating switch for 110kv electrical network according to any one of claim 1 to 6, it is characterized in that, the locking system of isolating switch, comprising:
Moving knife lock cell, comprises moving knife post, the long moving knife bar of 4m-4.5m, current sensor, electromagnetic lock and moving knife latch mechanism that 10kw-15kw moving knife motor, 2m-2.2m are long, moving knife post is movably connected on switch frame, moving knife bar is horizontally installed on the top of moving knife post, moving knife motor is connected in the bottom of moving knife post, this moving knife electric machine rotation drives moving knife post to rotate, the rotating speed ratio of moving knife motor rotation speed and moving knife post is 300-350, and the rotational angle of moving knife post is 0-95 degree, current sensor is set on moving knife bar, induced current when moving knife bar is charged in current sensor is not less than 30A, current sensor is provided with insulating barrier, the linen-cotton layer of insulating barrier to be the thickness comprised as nexine be 3-4mm, thickness as middle level is the plastic layer of 5-8mm, the ceramic layer of 1cm is greater than as outer field thickness, electromagnetic lock is arranged on moving knife post upper end, coil in current sensor secondary side and electromagnetic lock is connected to closed-loop path, induced current makes electromagnetic lock action, the dead bolt of its electromagnetic lock produces pulling force or the thrust of 50N-70N, ceramic layer is had in the outer wrap of electromagnetic lock, the dead bolt of electromagnetic lock connects the upper end of moving knife latch mechanism, the lower end of this moving knife latch mechanism is connected to moving knife bar bottom, moving knife latch mechanism is for locking the disconnection action of moving knife bar, the resistance that moving knife locks lower two ends is greater than 1500M Ω and the distance at its upper and lower two ends is greater than 1.8m,
Ground cutter lock cell, comprise ground knife bar, cutter shaft, cutter motor, quiet tool post, quiet cutter head, voltage sensor, electromagnetic lock and ground cutter latch mechanism, ground knife bar is connected on switch frame by ground cutter shaft, ground knife bar can turn to vertical direction around ground cutter shaft by horizontal direction and be connected with the ground cutter interface on quiet cutter head, the height of quiet cutter head is 1.9m-2.1m, the distance of the distance moving knife post of quiet tool post is 2-2.2m, moving knife interface on quiet cutter head and moving knife bar contour, match with moving knife interface in the end of moving knife bar, power be the ground cutter motor of 30kw-35kw be located at cutter shaft place, ground and ground cutter motor for knife bar rotationally, the rotating shaft of this ground cutter motor is 310-330 with the rotating ratio of ground cutter, the length of ground knife bar is 2m-2.2m, on ground knife bar, cover has the electro-insulating rubber layer of black, and ground knife bar is 0-92 degree around the rotational angle of ground cutter shaft, voltage sensor is provided with in quiet tool post upper end, coil in the secondary side of this voltage sensor and electromagnetic lock is connected to closed-loop path, voltage sensor can detect the voltage of Jing Daotouchu and in its second siding ring, produce the induced current of 50A-60A, after this induced current enters electromagnetic lock, coil in electromagnetic lock is charged, the iron core of electromagnetic lock produces electromagnetic force, electromagnetic force pulls or promotes the dead bolt action of electromagnetic lock, dead bolt connects the upper end of ground cutter latch mechanism, the action of locking ground, the lower end cutter of this ground cutter latch mechanism, ground cutter mechanism is locked onto on switch frame, the resistance at these upper and lower two ends of cutter latch mechanism, ground is greater than 2000M Ω and the distance at its upper and lower two ends is greater than 1.8m,
Interlocking unit, comprise some moving knife connecting rods, cutter connecting rod, self-lock rod and self-fastening button; Connect with moving knife connecting rod between the moving knife latch mechanism of the isolating switch of three-phase, moving knife connecting rod and moving knife lock the triangle mechanism of composition more than three, and this leg-of-mutton each limit length of side is all not less than 50cm; This moving knife connecting rod can make moving knife latch mechanism lock simultaneously or unlock moving knife post, enables the moving knife post action simultaneously of isolating switch; Connected by ground cutter connecting rod between the ground cutter latch mechanism of the isolating switch of three-phase, this ground cutter connecting rod is connected to cutter shaft place, ground and by the ground cutter shaft series connection of the isolating switch homonymy of three-phase, ground cutter connecting rod is fixed by flat key and ground cutter shaft; The switch frame of isolating switch is horizontally arranged with self-lock rod, a self-fastening button is respectively flexibly connected at the two ends of self-lock rod, the self-fastening button of its one end is located at moving knife post bottom for moving knife post is fixed to switch frame, the self-fastening button of the other end is located at cutter shaft place, ground for locking ground cutter shaft action, and this makes ground cutter mechanism and movable cutter mechanism close simultaneously.
8. the anti-error isolating switch for 110kv electrical network according to claim 7, is characterized in that, the control method of this isolating switch:
(1), isolating switch is when normally working, and current sensor senses electric current on moving knife bar, and now, produce the induced current of 30A-40A in the secondary coil of current sensor, induced current acts on electromagnetic lock through wire; In electromagnetic lock, to power on stream at electric current line of induction astragal;
(2), the induced current of 30A-40A makes the coil in electromagnetic lock charged, and the magnetic flux density that the iron core that coil is wound around produces is 500T-600T; Make the action of moving knife dead bolt thus lock this moving knife unit to complete disconnection action;
(3), behind iron core band magnetic field, under magneticaction, pull or promote the dead bolt of electromagnetic lock, dead bolt is subject to pulling force or the thrust of 50N-70N;
(4), dead bolt pulls or promotes moving knife latch mechanism and rise or decline, and the distance of its movement is greater than 3cm, and moving knife post to lock onto on switch frame and is locked as closure state by the lower end of movable cutter mechanism;
(5), after the electric current on isolating switch is disconnected, induced current on current sensor disappears, influence electricity flows in electromagnetic lock, electromagnetic lock power-off, the dead bolt of electromagnetic lock is under the elastic force effect of its spring 20-30N, dead bolt resets to unlocked position, and dead bolt promotes or pulls moving knife latch mechanism to move and unlock moving knife post simultaneously;
(6), the moving knife bar of this isolating switch is when being in service position or open position, and voltage sensor senses with the alternating voltage being over the ground greater than 10kv on quiet cutter head, forms the induced current of 10A-20A at the secondary side of voltage sensor;
(7), after induced current enters electromagnetic lock, flow through the coil in electromagnetic lock and produce magnetic field on coil, this magnetic field is by being conducted by the iron core of coil winding, and the magnetic flux density now on iron core is 300T-450T; Magnetic force on iron core will pull or promote the dead bolt action of electromagnetic lock;
(8), dead bolt has acted on pulling force or the thrust of 30-40N to the ground cutter latch mechanism be connected on dead bolt; Ground cutter latch mechanism moves up or down under the effect of pulling force or thrust, and the distance of its movement is greater than 5cm;
(9), the lower end of cutter latch mechanism the action of moving knife post is locked, or the lower end of ground cutter latch mechanism makes moving knife post be locked as off-state by link gear;
(10), when voltage drop on the quiet cutter head of isolating switch is low to moderate the magnitude of voltage allowing to close ground cutter, voltage sensor cannot sense that the alternating voltage over the ground on quiet cutter head or the voltage to earth on its quiet cutter head meet the requirement of closed ground cutter, the secondary side induced current of voltage sensor disappears or reduces, the magnetic flux density of electromagnetic lock interior loop reduces, iron core is to the pulling force of dead bolt or the thrust elastic force lower than dead bolt back-moving spring, the size of this elastic force is 15N-20N, dead bolt resets under the elastic force effect of back-moving spring, dead bolt drives ground cutter latch mechanism action, the lower end cutter shaft unblock over the ground of ground cutter latch mechanism,
(11), when the moving knife post of movable cutter mechanism needs rotational action, the electric current on isolating switch is controlled to fall zero, moving knife latch mechanism on three-phase isolation switch unlocks, three moving knife latch mechanisms under the effect of moving knife connecting rod simultaneously on move or move down, the triangular structure that its moving knife connecting rod and moving knife latch mechanism form can strengthen the degree of stability of its structure, makes the isolating switch of three-phase unlock simultaneously or lock;
(12), when the moving knife post of isolating switch turns to open position, moving knife post pulls the self-fastening button being located at moving knife post lower end, and self-fastening button is to the pulling force of self-lock rod effect 50N-80N or thrust; The self-lock rod other end be located at ground the moving at pulling force or thrust self-fastening button of cutter shaft place, and cutter shaft unlocks over the ground;
(13), interlocking unit and ground cutter lock cell are after cutter shaft unlocks all over the ground, when the ground cutter of three-phase isolation switch needs closed action, the ground knife bar of three-phase upwards rotates under the effect of ground cutter connecting rod simultaneously, until cutter upper end, ground is connected with the ground cutter interface on quiet cutter head;
(14) when cutter is close to closure state, the self-fastening button action of cutter lower end, ground pulls with the power of 50N-80N or promotes self-lock rod, be positioned at self-fastening button action under the pulling force of self-lock rod or the effect of thrust of moving knife post lower end, isolating switch is locked as off-state by the self-fastening button of moving knife post lower end;
(15) when, local knife bar is positioned at open position, in isolating switch closing course, isolating switch drives the self-fastening button action below it, self-fastening button makes self-lock rod action with the pulling force of 50N-80N or thrust, be positioned at the self-fastening button below ground cutter shaft, ground knife bar is locked as off-state, and side by side cutter lock cell detects with alternating voltage over the ground on quiet cutter head, and ground cutter shaft locks by moving knife lock cell further.
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| CN201510674159.6A CN105225880B (en) | 2015-10-19 | 2015-10-19 | A kind of anti-error disconnecting switch for 110kV power grids |
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