CN201910618U - Ground wire isolator - Google Patents
Ground wire isolator Download PDFInfo
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- CN201910618U CN201910618U CN2011200305209U CN201120030520U CN201910618U CN 201910618 U CN201910618 U CN 201910618U CN 2011200305209 U CN2011200305209 U CN 2011200305209U CN 201120030520 U CN201120030520 U CN 201120030520U CN 201910618 U CN201910618 U CN 201910618U
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Abstract
The utility model relates to a ground wire isolator, belonging to the technical field of railway signal equipment protection and solving the problem that when insulation test is carried out on signal cables of the railway signal equipment, a lightning protector is frequently plugged so as to lead the contact reliability to be reduced. The ground wire isolator comprises a switch contact, an electric push rod, a control circuit and a motor, wherein the control circuit is used for controlling the motor and further controlling the action of the electric push rod, and the electric push rod drives the switch contact to realize the action of switching on or switching off; the control circuit consists of a power supply circuit, a state indicating circuit, a motor action circuit, an alarm circuit, a state feedback circuit, a push rod executing circuit and a microcomputer monitoring system; and the switch contact is connected between the equipment ground and a grounding body of the lightning protector, and by switching operation, the purpose of electric conduction or isolation between the equipment ground and the grounding body is achieved. The ground wire isolator is used for protecting the lightning protector in the cable insulation test.
Description
Technical field
The utility model relates to a kind of ground wire isolator, belongs to railway signals equipment guard technology field.
Background technology
At each railway station; signalling arrangement in the railway signal machine room all needs to carry out thunder and lightning and electromagnetic compatibility integrated protection; the enforcement of thunder and lightning and electromagnetic compatibility integrated protection engineering; can farthest reduce the infringement that thunder and lightning causes railway signals equipment; improve the electromagnetic interference capability of resisting of signalling arrangement, the emphasis of these protection works is that protection microcomputer interlocking equipment reduces the damage to crops caused by thunder fault.In recent years, along with the deep development of railway signals equipment system thunder defending engineering, because thunder and lightning is broken signalling arrangement and caused the situation of interference to significantly reduce to transportation.
Railway signals equipment thunder and lightning and electromagnetic compatibility integrated protection content comprise to be improved signal machine room electromagnetic environment and special-purpose lightning protector two aspects is set.For all wanting lightning protector in parallel and be connected to ground wire from the external lead of going into of machine room.Lightning protector is a kind of device to voltage-sensitive, and it surpasses its rated voltage U in both end voltage
CSituation under, can be breakdown, and then following overvoltage ripple that lead imports into by lightning protector transient state branch inflow place.
Simultaneously, also can produce serious consequence if the signal cable insulation against ground that is connected with signalling arrangement is bad.According to " signal maintenance rules technology standard " requirement, adopting 500V megohm meter to measure the signal cable heart yearn and the insulating resistance value between the earth that obtain must not be less than 1M Ω.Therefore require the edge resistance of signal cable is regularly tested, because signal cable over the ground and be connected to lightning protector, when signal cable is carried out Insulation test, the output voltage of 500V megohm meter will exceed the rated voltage U of lightning protector
C, the lightning protector that causes thus can make the inaccurate or damage lightning protector of test data with breakdown ground connection.Therefore, the check mark cable carries out Insulation test, the following two kinds of methods of main at present employing: a kind of is to carry out the cable insulation test after lightning protector is extracted one by one again; Another kind method is before signal cable carries out Insulation test, with the earth connection disconnection of lightning protector.Yet, plug the reliability that lightning protector not only can reduce the lightning protector contact continually, also increased a large amount of workloads; And disconnect the earth connection of lightning protector simply, again can be owing to missing the risk that earth connection causes lightning protector to lose efficacy behind the Insulation test.
The utility model content
The utility model is when carrying out Insulation test for the signal cable that solves railway signals equipment, plugs the problem that lightning protector reduces the reliability of its contact continually, and a kind of ground wire isolator is provided.
The utility model comprises switch contact, electric pushrod, control circuit and motor, and control circuit is used to control motor and then the action of electric pushrod is controlled, and drives the action that the switch contact realization opens or closes by electric pushrod;
Control circuit is made up of power circuit, state representation circuit, motor action circuit, warning circuit, state-feedback circuit, push rod executive circuit and microcomputer detecting system,
The input of power circuit connects power frequency 220V alternating current, the output output 12V d. c. voltage signal of power circuit, and power circuit provides working power for state representation circuit, motor action circuit, warning circuit and state-feedback circuit,
There are first branch road and second branch road to be in parallel between the 12V current potential input of state representation circuit and the 12V power supply ground, the 12V current potential input of first branch road connects the moving contact of first group of single-pole double-throw switch (SPDT) of first relay, the normally-closed contact of first group of single-pole double-throw switch (SPDT) of first relay connects the moving contact of first group of single-pole double-throw switch (SPDT) of second relay, the normally-closed contact of first group of single-pole double-throw switch (SPDT) of second relay connects an end of the coil of the 3rd relay, the other end of the coil of the 3rd relay connects the normally opened contact of first group of single-pole double-throw switch (SPDT) of the 5th relay, and the moving contact of first group of single-pole double-throw switch (SPDT) of the 5th relay connects 12V power supply ground;
12V current potential input connects an end of buzzer, and the other end of buzzer is connected between first group of single-pole double-throw switch (SPDT) of the coil of the 3rd relay and the 5th relay,
The normally opened contact of first group of single-pole double-throw switch (SPDT) of first relay connects an end of the coil of the normally opened contact of first group of single-pole double-throw switch (SPDT) of second relay and the 4th relay simultaneously, the other end of the coil of the 4th relay connects the normally-closed contact of first group of single-pole double-throw switch (SPDT) of the 6th relay, the moving contact of first group of single-pole double-throw switch (SPDT) of the 6th relay connects 12V power supply ground, the normally opened contact of first group of single-pole double-throw switch (SPDT) of the 6th relay connects the negative electrode of first diode, the anode of first diode connects the anode of second diode, the negative electrode of second diode connects the normally-closed contact of first group of single-pole double-throw switch (SPDT) of the 5th relay, and second resistance string is associated between the anode of the 12V current potential input of first branch road and second diode;
Coil, normally closed hand push button and the Chang Kai hand push button of second relay in sequential series between the 12V current potential input of second branch road and the 12V power supply ground,
12V current potential input connects an end of the 3rd resistance, the other end of the 3rd resistance connects the anode of the 3rd diode, the negative electrode of the 3rd diode connects the normally-closed contact of second group of single-pole double-throw switch (SPDT) of second relay, the moving contact of second group of single-pole double-throw switch (SPDT) of second relay connects the 12V power supply ground of second branch road
The normally opened contact of second group of single-pole double-throw switch (SPDT) of second relay connects the negative electrode of the 4th diode, the anode of the 4th diode is connected between the anode and the 3rd resistance of the 3rd diode, and the negative electrode of the 4th diode is connected between normally closed hand push button and the Chang Kai hand push button;
The 12V current potential input of motor action circuit connects the normally-closed contact of the 3rd relay single-pole double-throw switch (SPDT), the normally opened contact of the 3rd relay single-pole double-throw switch (SPDT) connects 12V power supply ground, 12V power supply ground connects the normally-closed contact of the 4th relay single-pole double-throw switch (SPDT), the normally opened contact of the 4th relay single-pole double-throw switch (SPDT) connects the 12V current potential input of motor action circuit
The 5th resistance in sequential series and second electric capacity between the moving contact of the moving contact of the 3rd relay single-pole double-throw switch (SPDT) and the 4th relay single-pole double-throw switch (SPDT), the moving contact of the 3rd relay single-pole double-throw switch (SPDT) is connected with motor by connector with the moving contact of the 4th relay single-pole double-throw switch (SPDT), realization is to the control of motor
The 12V current potential input of warning circuit and an end that is connected the 4th resistance; The other end of the 4th resistance connects the anode of the 5th diode; The negative electrode of the 5th diode connects the normally-closed contact of second group of single-pole double-throw switch (SPDT) of first relay; The movable contact of second group of single-pole double-throw switch (SPDT) of first relay connects 12V power supply ground; The normally opened contact of second group of single-pole double-throw switch (SPDT) of first relay connects the negative electrode of the 6th diode; The anodic bonding of the 6th diode is between the anode of the 4th resistance and the 5th diode
The 12V current potential input of warning circuit connects an end of the coil of first relay, the other end of the coil of first relay connects the moving contact of first group of single-pole double-throw switch (SPDT) of the 7th relay, and the normally opened contact of first group of single-pole double-throw switch (SPDT) of the 7th relay connects 12V power supply ground;
The 12V current potential input of state-feedback circuit connects an end of the coil of the 5th relay, the other end of the coil of the 5th relay connects the normally opened contact of the first limit switch single-pole double-throw switch (SPDT) by connector, the moving contact of the first limit switch single-pole double-throw switch (SPDT) connects 12V power supply ground by this connector, the moving contact of the first limit switch single-pole double-throw switch (SPDT) connects the moving contact of the second limit switch single-pole double-throw switch (SPDT) simultaneously, the normally-closed contact of the second limit switch single-pole double-throw switch (SPDT) connects an end of the 6th relay coil, the 12V current potential input of the other end connection status feedback circuit of the 6th relay coil by this connector;
The one 24V pin of microcomputer detecting system connects the normally opened contact of second group of single-pole double-throw switch (SPDT) of the 6th relay, the moving contact of second group of single-pole double-throw switch (SPDT) of the 6th relay connects the KR1 pin of microcomputer detecting system, the KR2 pin of microcomputer detecting system connects the normally opened contact of second group of single-pole double-throw switch (SPDT) of the 7th relay, the moving contact of second group of single-pole double-throw switch (SPDT) of the 7th relay connects an end of the coil of the 2nd 24V pin of microcomputer detecting system and the 7th relay simultaneously, and the other end of the coil of the 7th relay connects the KC pin of microcomputer detecting system;
One end of push rod executive circuit is an equipment ground end, and the other end is the earth electrode end, and described equipment ground end connects the moving contact of push rod executive circuit single-pole double-throw switch (SPDT), and the earth electrode end connects the normally-closed contact of push rod executive circuit single-pole double-throw switch (SPDT).
Described ground wire isolator also comprises the transient state connector, and described transient state connector and switch contact are in parallel.
Described ground wire isolator, described transient state connector is a discharge tube.
Described ground wire isolator, described discharge tube adopt two utmost point ceramet gas discharge tubes, and model is BL1000-100kA.
Described ground wire isolator, described switch contact adopts flat contact, and the model of flat contact is GC6-400A.
The utility model has the advantages that: the utility model is provided with the heavy current disconnecting switches contact, is connected between the equipment ground and earth electrode of lightning protector, by switching manipulation, reaches the electric connection between equipment ground and the earth electrode or the purpose of isolation.Under the normality situation, the isolating switch closure, ground wire is normally connected, and satisfies the lightning protection requirement.When needs carried out the cable insulation test, switch contact was opened, and disconnected ground wire, satisfied the cable insulation test request.
This practicality newly can guarantee the safety relief of lightning current, and can correctly reflect the open and-shut mode of switch contact by related circuit.It adopts microcomputer detecting system and two kinds of maneuverability patterns of manual pushbutton, is convenient to on-the-spot the use and Long-distance Control, has used relay in the control circuit, has higher interference free performance.
Description of drawings:
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is the contour structures schematic diagram of flat contact;
Fig. 3 is the internal structure schematic diagram of flat contact.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1, present embodiment comprises switch contact, electric pushrod, control circuit and motor 4, control circuit is used to control motor 4 and then the action of electric pushrod is controlled, and drives the action that the switch contact realization opens or closes by electric pushrod;
Control circuit is made up of power circuit 3-1, state representation circuit 3-2, motor action circuit 3-3, warning circuit 3-4, state-feedback circuit 3-5, push rod executive circuit 3-6 and microcomputer detecting system 3-7,
The input of power circuit 3-1 connects power frequency 220V alternating current, the output output 12V d. c. voltage signal of power circuit 3-1, power circuit 3-1 provides working power for state representation circuit 3-2, motor action circuit 3-3, warning circuit 3-4 and state-feedback circuit 3-5
There are first branch road and second branch road to be in parallel between the 12V current potential input of state representation circuit 3-2 and the 12V power supply ground, the 12V current potential input of first branch road connects the moving contact of first group of single-pole double-throw switch (SPDT) of the first relay YCKJ, the normally-closed contact of first group of single-pole double-throw switch (SPDT) of the first relay YCKJ connects the moving contact of first group of single-pole double-throw switch (SPDT) of the second relay BDKJ, the normally-closed contact of first group of single-pole double-throw switch (SPDT) of the second relay BDKJ connects an end of the coil of the 3rd relay J TJ, the other end of the coil of the 3rd relay J TJ connects the normally opened contact of first group of single-pole double-throw switch (SPDT) of the 5th relay J TXJ, and the moving contact of first group of single-pole double-throw switch (SPDT) of the 5th relay J TXJ connects 12V power supply ground;
12V current potential input connects the end of buzzer FMQ, and the other end of buzzer FMQ is connected between first group of single-pole double-throw switch (SPDT) of the coil of the 3rd relay J TJ and the 5th relay J TXJ,
The normally opened contact of first group of single-pole double-throw switch (SPDT) of the first relay YCKJ connects an end of the coil of the normally opened contact of first group of single-pole double-throw switch (SPDT) of the second relay BDKJ and the 4th relay DKJ simultaneously, the other end of the coil of the 4th relay DKJ connects the normally-closed contact of first group of single-pole double-throw switch (SPDT) of the 6th relay DKXJ, the moving contact of first group of single-pole double-throw switch (SPDT) of the 6th relay DKXJ connects 12V power supply ground, the normally opened contact of first group of single-pole double-throw switch (SPDT) of the 6th relay DKXJ connects the negative electrode of the first diode DKD/HD, the anode of the first diode DKD/HD connects the anode of the second diode JTD/LD, the negative electrode of the second diode JTD/LD connects the normally-closed contact of first group of single-pole double-throw switch (SPDT) of the 5th relay J TXJ, and second resistance R 2 is connected between the anode of the 12V current potential input of first branch road and the second diode JTD/LD;
The coil of the second relay BDKJ in sequential series, normally closed hand push button JTA and Chang Kai hand push button DKA between the 12V current potential input of second branch road and the 12V power supply ground,
12V current potential input connects an end of the 3rd resistance R 3, the other end of the 3rd resistance R 3 connects the anode of the 3rd diode BDJTD, the negative electrode of the 3rd diode BDJTD connects the normally-closed contact of second group of single-pole double-throw switch (SPDT) of the second relay BDKJ, the moving contact of second group of single-pole double-throw switch (SPDT) of the second relay BDKJ connects the 12V power supply ground of second branch road
The normally opened contact of second group of single-pole double-throw switch (SPDT) of the second relay BDKJ connects the negative electrode of the 4th diode BDDKD, the anode of the 4th diode BDDKD is connected between the anode and the 3rd resistance R 3 of the 3rd diode BDJTD, and the negative electrode of the 4th diode BDDKD is connected between normally closed hand push button JTA and the Chang Kai hand push button DKA;
The 12V current potential input of motor action circuit 3-3 connects the normally-closed contact of the 3rd relay J TJ single-pole double-throw switch (SPDT), the normally opened contact of the 3rd relay J TJ single-pole double-throw switch (SPDT) connects 12V power supply ground, 12V power supply ground connects the normally-closed contact of the 4th relay DKJ single-pole double-throw switch (SPDT), the normally opened contact of the 4th relay DKJ single-pole double-throw switch (SPDT) connects the 12V current potential input of motor action circuit 3-3
The 5th resistance R 5 in sequential series and second capacitor C 2 between the moving contact of the moving contact of the 3rd relay J TJ single-pole double-throw switch (SPDT) and the 4th relay DKJ single-pole double-throw switch (SPDT), the moving contact of the 3rd relay J TJ single-pole double-throw switch (SPDT) is connected with motor 4 by connector with the moving contact of the 4th relay DKJ single-pole double-throw switch (SPDT), realization is to the control of motor 4
The 12V current potential input of warning circuit 3-4 and an end that is connected the 4th resistance R 4, the other end of the 4th resistance R 4 connects the anode of the 5th diode YCJTD, the negative electrode of the 5th diode YCJTD connects the normally-closed contact of second group of single-pole double-throw switch (SPDT) of the first relay YCKJ, the moving contact of second group of single-pole double-throw switch (SPDT) of the first relay YCKJ connects 12V power supply ground, the normally opened contact of second group of single-pole double-throw switch (SPDT) of the first relay YCKJ connects the negative electrode of the 6th diode YCDKD, the anode of the 6th diode YCDKD is connected between the anode of the 4th resistance R 4 and the 5th diode YCJTD
The 12V current potential input of warning circuit 3-4 connects an end of the coil of the first relay YCKJ, the other end of the coil of the first relay YCKJ connects the moving contact of first group of single-pole double-throw switch (SPDT) of the 7th relay DJKTJ, and the normally opened contact of first group of single-pole double-throw switch (SPDT) of the 7th relay DJKTJ connects 12V power supply ground;
The 12V current potential input of state-feedback circuit 3-5 connects an end of the coil of the 5th relay J TXJ, the other end of the coil of the 5th relay J TXJ connects the normally opened contact of the first limit switch JTXK single-pole double-throw switch (SPDT) by connector, the moving contact of the first limit switch JTXK single-pole double-throw switch (SPDT) connects 12V power supply ground by this connector, the moving contact of the first limit switch JTXK single-pole double-throw switch (SPDT) connects the moving contact of the second limit switch DKXK single-pole double-throw switch (SPDT) simultaneously, the normally-closed contact of the second limit switch DKXK single-pole double-throw switch (SPDT) connects an end of the 6th relay DKXJ coil, the 12V current potential input of the other end connection status feedback circuit 3-5 of the 6th relay DKXJ coil by this connector;
The 24V pin of microcomputer detecting system 3-7 connects the normally opened contact of second group of single-pole double-throw switch (SPDT) of the 6th relay, the moving contact of second group of single-pole double-throw switch (SPDT) of the 6th relay connects the KR1 pin of microcomputer detecting system 3-7, the KR2 pin of microcomputer detecting system 3-7 connects the normally opened contact of second group of single-pole double-throw switch (SPDT) of the 7th relay, the moving contact of second group of single-pole double-throw switch (SPDT) of the 7th relay connects an end of the coil of the 2nd 24V pin of microcomputer detecting system 3-7 and the 7th relay simultaneously, and the other end of the coil of the 7th relay connects the KC pin of microcomputer detecting system 3-7;
The end of push rod executive circuit 3-6 is equipment ground end A, and the other end is earth electrode end B, and described equipment ground end connects the moving contact of push rod executive circuit 3-6 single-pole double-throw switch (SPDT), and the earth electrode end connects the normally-closed contact of push rod executive circuit 3-6 single-pole double-throw switch (SPDT).
The effect of the described ground wire isolator of present embodiment is to disconnect lightning protector to carry out the cable insulation test, and the requirement when reality is used is taken all factors into consideration according to isolator, determines that its general technical condition is: adopt the alternating current 220V power supply; The state of its switch contact can show by acousto-optic, can realize Local or Remote control.Can adopt the disconnecting state of the color showing ground wire isolator of LED, the warning of when disconnecting, sounding, prompt facility administrative staff.
Can be when the lightning protection ground wire is released lightning current to the strong electromagnetic interference signal of space radiation, and the electronic circuit anti-electromagnetic interference capability is very weak, therefore, the control circuit of electric pushrod tries not to adopt electronic circuit.Comparatively speaking, the ability of the anti-electromagnetic interference of relay will be much higher than electronic circuit, so adopt the control circuit of relay circuit as electric pushrod.
Electric pushrod is a kind of linear actuator as the operating mechanism of switch contact, is driven by DC micromotor 4, converts reciprocal push-and-pull rectilinear motion to by gear reduction unit and T type screw mandrel.Built-in limit switch, push-and-pull promptly stops automatically to spacing point.The polarity of conversion working power is convertible push pull maneuver.
The technical specification of electric pushrod is: working power: DC12V; Push-and-pull speed: 6mm/S; Thrust: 900N, pulling force: 750N; Specified running rate: 15%; Stroke: 30mm; Working temperature :-20 ℃-60 ℃.
Microcomputer detecting system 3-7 is before Insulation test begins, automatically control the 7th relay DJKTJ by the control board circuit, make the 7th relay DJKTJ Long-distance Control first relay YCKJ excitation, and then disconnect the excitation of the 4th relay DKJ, make motor 4 start open circuit, switch contact is disconnected.In switch contact is carried out by the action that is switched to disconnection, make the 5th relay J TXJ excitation during connection, disconnect fully, the 6th relay DKXJ loss of excitation is fallen up to switch contact, open circuit is carried the switch contact cut-off signal to microcomputer detecting system 3-7 simultaneously.After microcomputer detecting system 3-7 receives cut-off signal, begin to start Insulation test, microcomputer detecting system 3-7 discharges the 7th relay DJKTJ after Insulation test finishes, make the first relay YCKJ loss of excitation, and then make the 3rd relay J TJ connect excitation, motor 4 is started, connect circuit, connect, switch contact is connected back the 5th this relay of relay J TXJ excitation should keep full state when nonisulated test, so far finish whole Insulation test process.
State-feedback circuit 3-5:
This circuit mainly is the actuating length distance of control motor 4, guarantee that switch contact effectively disconnected or connection in 4.0 ± 1.0 seconds, while can also be reflected the on off operating mode of ground wire isolator, imports the corresponding state signal of the switch contact of ground wire isolator to microcomputer detecting system 3-7.
Two kinds of Starting mode are handled and handled manually to this circuit automatically by microcomputer detecting system 3-7.Automatically handle and make the first relay YCKJ excitation, connect the 4th relay DKJ, and then control motor 4 starts the cut-off switch contact; Otherwise the first relay YCKJ loss of excitation makes the 3rd relay J TJ excitation, and then control motor 4 starts the connection switch contact.Handle manually and be: manually press normally closed hand push button JTA, the local control second relay BDKJ loss of excitation falls, and makes the 3rd relay J TJ excitation, and then starter motor 4 is connected switch contact; Manually press and often open hand push button DKA, the local control second relay BDKJ excitation is controlled the 4th relay DKJ excitation, and then starter motor 4, the cut-off switch contact.
Motor action circuit 3-3 mainly is forward and reverse action of finishing motor 4, switch contact is disconnected or connection.
State representation circuit 3-2 and warning circuit 3-4 mainly are the states of reflection ground wire isolator, and just often switch contact is connected, and the second diode JTD/LD, the 5th diode YCJTD and the 3rd diode BDJTD light; When switch contact disconnected, indicator light the 4th diode BDDKD and the 5th diode YCJTD lighted, the warning of sounding simultaneously; The indicator light second diode JTD/LD, the 4th diode BDDKD and the 6th diode YCDKD light when the ground wire isolator disconnects fully, the warning of sounding simultaneously.When the ground wire isolator when being disconnected to ON Action, the 5th diode YCJTD and the 3rd diode BDJTD light, the warning of sounding simultaneously.
Embodiment two:
The difference of present embodiment and execution mode one is that it also comprises the transient state connector, and described transient state connector and switch contact are in parallel.Other is identical with execution mode one.
The use of transient state connector makes when switch contact disconnects, and signalling arrangement still possesses safety precautions.
Embodiment three:
Present embodiment is for to the further specifying of execution mode two, and described transient state connector is a discharge tube.Other is identical with execution mode two.
Embodiment four:
Present embodiment is for to the further specifying of execution mode three, and described discharge tube adopts two utmost point ceramet gas discharge tubes, and model is BL1000-100kA.Other is identical with execution mode three.
Because when carrying out the cable insulation test, switch contact disconnects will cause lightning protector complete failure, during this period, if there is thunder and lightning to invade, signalling arrangement will lose effective protection.In order to overcome the security risk of existence, we will and connect a transient state connector on the ground wire isolating switch.Open at the ground wire isolation switch contact, under the situation of cable insulation or ground resistance test, if there is thunder and lightning to invade, this transient state connector will be connected moment, the lightning current of can effectively releasing.By demonstration, can adopt discharge tube as switch bypass transient state connector.This discharge tube should possess enough discharging currents, and will select suitable discharge voltage, the thunder and lightning overvoltage of cable core should be limited in the safe range, avoids cable insulation test job voltage breakdown discharge tube again.
When switch contact disconnected, lightning protector will connect ground wire by the transient state connector, and the barrier propterty of lightning protector will be subjected to certain influence.Therefore, even be provided with switch bypass transient state connector, also suggestion will avoid carrying out cable insulation and ground resistance test job during overcast and rainy thunder and lightning weather.
The operation principle of discharge tube is a gas discharge, and it is a kind of lightning protection component with switch character, works release thunder and lightning transient state overcurrent and over-voltage effect.When applied voltage increased to dielectric strength above gas, the gap of two interpolars was converted into conduction state with discharge breakdown by original state of insulation, and the voltage after the conducting between discharge tube the two poles of the earth maintains the residual voltage level that the arc road is determined.
Model is that the ceramic gas discharge tube of BL1000-100kA has that the surge current of bearing is big, interelectrode capacitance is low, insulation resistance is big, steady performance.
Two utmost point ceramet gas discharge tube technical specifications: dc breakdown voltage (voltage build-up rate is 100V/ second): 1000 ± 20%V; Pulse breakdown voltage (voltage build-up rate is 1kV/ μ S):＜2000V; The anti-stream of pulse (8/20 μ S current wave, ± 5 times): 100kA; The anti-stream of pulse (10/350 μ S current wave, ± 5 times): 25kA; The anti-stream of maximum impulse (8/20 μ S current wave, 1 time): 120kA; Insulation resistance (at 100Vdc):＞1000M Ω; Interelectrode capacitance (at 1000Hz):＜10pF; Arc voltage (at 1A) :～15V; Glow voltage (at 1mA):＞70V; Serviceability temperature :-40～+ 90 ℃.
Embodiment five: in conjunction with Fig. 2 and Fig. 3 present embodiment is described,
Present embodiment is for to the further specifying of execution mode one, and described switch contact adopts flat contact, and the model of flat contact is GC6-400A.Other is identical with execution mode one.
Because the lightning protection ground wire will satisfy enough through-current capacities and earth resistance, therefore, switch contact also will satisfy the requirement of corresponding through-current capacity and contact resistance.There is the shortcoming that contact resistance is big, stray inductance is big, through-current capacity is little in general contact such as knife contact.Through demonstration with than choosing, determine to adopt the flat contact of high voltage large capcity electric power of national standard.Flat contact has the big advantage of the little through-current capacity of contact resistance, and flat contact possesses self-cleaning function, overcomes owing to metal oxide layer or dust reason cause the unsettled adverse effect of switch contact resistance.
Select the operating mechanism of electric pushrod as switch contact for use, operating mechanism can have a variety of forms, such as manual, permanent magnetism, electromagnetism and electric operation mechanism etc.Because flat contact on-off action stroke is longer, is not suitable for adopting permanent magnetism and electromagnetically-operated mechanism.In addition, system does not have Compulsory Feature to the on-off action time of switch yet, so can select the slower electric operation mechanism of relative action for use.According to actual requirement, can select the operating mechanism of the small-sized electric push rod of 12V DC driven for use as flat contact.
Flat contact is a kind of plug-in type contact, and the duckbill fingertip that its fixed contact is split by multi-disc is formed, and moving contact is a flat plate.During connection, utilize extension spring directly the fixed contact fingertip to be pressed on the flat plate of moving contact, every fingertip forms line with plate and contacts, and contact is reliable.Simultaneously, the pressure direction between dynamic/static contact is vertical with the direction of motion, and the spring when contact is connected is little.Produce friction during dynamic and static contact relative motion, self-cleaning action is arranged.
Flat contact model is: GC6-400A, the flat contact of full name Extension Spring-type.The design feature of the flat contact of this model: spring leaf is chanted lacquer and is handled, and prevents its oxidation and rusting; The thick silver of fingertip brush plating, abrasion strength is strong; Anti-variable color is handled, and avoids the silver layer oxidation to come off.
The flat contacts Technology specification of Extension Spring-type: rated voltage: 10kV; Rated current: 400A; Dynamic current (peak value): 16kA; Contact resistance :≤0.05 ohm; Contact sheet number: 8.
Ground wire isolator described in the utility model is air themperature around :-5 ℃～+ 40 ℃; Surrounding air relative humidity: be not more than 90% (when temperature is 25 ℃); Atmospheric pressure: 70kPa～106kPa (it is following to be equivalent to height above sea level 3000m); Not having on every side can reliably working under the environmental condition of corroding and not having the dangerous pernicious gas that sets off an explosion.
Claims (5)
1. ground wire isolator, it is characterized in that: it comprises switch contact, electric pushrod, control circuit and motor (4), control circuit is used to control motor (4) and then the action of electric pushrod is controlled, and drives the action that the switch contact realization opens or closes by electric pushrod;
Control circuit is made up of power circuit (3-1), state representation circuit (3-2), motor action circuit (3-3), warning circuit (3-4), state-feedback circuit (3-5), push rod executive circuit (3-6) and microcomputer detecting system (3-7),
The input of power circuit (3-1) connects power frequency 220V alternating current, the output output 12V d. c. voltage signal of power circuit (3-1), power circuit (3-1) is that state representation circuit (3-2), motor action circuit (3-3), warning circuit (3-4) and state-feedback circuit (3-5) provide working power
There are first branch road and second branch road to be in parallel between the 12V current potential input of state representation circuit (3-2) and the 12V power supply ground, the 12V current potential input of first branch road connects the moving contact of first group of single-pole double-throw switch (SPDT) of first relay (YCKJ), the normally-closed contact of first group of single-pole double-throw switch (SPDT) of first relay (YCKJ) connects the moving contact of first group of single-pole double-throw switch (SPDT) of second relay (BDKJ), the normally-closed contact of first group of single-pole double-throw switch (SPDT) of second relay (BDKJ) connects an end of the coil of the 3rd relay (JTJ), the other end of the coil of the 3rd relay (JTJ) connects the normally opened contact of first group of single-pole double-throw switch (SPDT) of the 5th relay (JTXJ), and the moving contact of first group of single-pole double-throw switch (SPDT) of the 5th relay (JTXJ) connects 12V power supply ground;
12V current potential input connects an end of buzzer (FMQ), and the other end of buzzer (FMQ) is connected between first group of single-pole double-throw switch (SPDT) of the coil of the 3rd relay (JTJ) and the 5th relay (JTXJ),
The normally opened contact of first group of single-pole double-throw switch (SPDT) of first relay (YCKJ) connects an end of the coil of the normally opened contact of first group of single-pole double-throw switch (SPDT) of second relay (BDKJ) and the 4th relay (DKJ) simultaneously, the other end of the coil of the 4th relay (DKJ) connects the normally-closed contact of first group of single-pole double-throw switch (SPDT) of the 6th relay (DKXJ), the moving contact of first group of single-pole double-throw switch (SPDT) of the 6th relay (DKXJ) connects 12V power supply ground, the normally opened contact of first group of single-pole double-throw switch (SPDT) of the 6th relay (DKXJ) connects the negative electrode of first diode (DKD/HD), the anode of first diode (DKD/HD) connects the anode of second diode (JTD/LD), the negative electrode of second diode (JTD/LD) connects the normally-closed contact of first group of single-pole double-throw switch (SPDT) of the 5th relay (JTXJ), and second resistance (R2) is connected between the anode of the 12V current potential input of first branch road and second diode (JTD/LD);
The coil of second relay in sequential series (BDKJ), normally closed hand push button (JTA) and often open hand push button (DKA) between the 12V current potential input of second branch road and the 12V power supply ground,
12V current potential input connects an end of the 3rd resistance (R3), the other end of the 3rd resistance (R3) connects the anode of the 3rd diode (BDJTD), the negative electrode of the 3rd diode (BDJTD) connects the normally-closed contact of second group of single-pole double-throw switch (SPDT) of second relay (BDKJ), the moving contact of second group of single-pole double-throw switch (SPDT) of second relay (BDKJ) connects the 12V power supply ground of second branch road
The normally opened contact of second group of single-pole double-throw switch (SPDT) of second relay (BDKJ) connects the negative electrode of the 4th diode (BDDKD), the anode of the 4th diode (BDDKD) is connected between the anode and the 3rd resistance (R3) of the 3rd diode (BDJTD), and the negative electrode of the 4th diode (BDDKD) is connected normally closed hand push button (JTA) and often opens between the hand push button (DKA);
The 12V current potential input of motor action circuit (3-3) connects the normally-closed contact of the 3rd relay (JTJ) single-pole double-throw switch (SPDT), the normally opened contact of the 3rd relay (JTJ) single-pole double-throw switch (SPDT) connects 12V power supply ground, 12V power supply ground connects the normally-closed contact of the 4th relay (DKJ) single-pole double-throw switch (SPDT), the normally opened contact of the 4th relay (DKJ) single-pole double-throw switch (SPDT) connects the 12V current potential input of motor action circuit (3-3)
The 5th resistance in sequential series (R5) and second electric capacity (C2) between the moving contact of the moving contact of the 3rd relay (JTJ) single-pole double-throw switch (SPDT) and the 4th relay (DKJ) single-pole double-throw switch (SPDT), the moving contact of the 3rd relay (JTJ) single-pole double-throw switch (SPDT) is connected with motor (4) by connector with the moving contact of the 4th relay (DKJ) single-pole double-throw switch (SPDT), realization is to the control of motor (4)
The 12V current potential input of warning circuit (3-4) and an end that is connected the 4th resistance (R4), the other end of the 4th resistance (R4) connects the anode of the 5th diode (YCJTD), the negative electrode of the 5th diode (YCJTD) connects the normally-closed contact of second group of single-pole double-throw switch (SPDT) of first relay (YCKJ), the moving contact of second group of single-pole double-throw switch (SPDT) of first relay (YCKJ) connects 12V power supply ground, the normally opened contact of second group of single-pole double-throw switch (SPDT) of first relay (YCKJ) connects the negative electrode of the 6th diode (YCDKD), the anode of the 6th diode (YCDKD) is connected between the anode of the 4th resistance (R4) and the 5th diode (YCJTD)
The 12V current potential input of warning circuit (3-4) connects an end of the coil of first relay (YCKJ), the other end of the coil of first relay (YCKJ) connects the moving contact of first group of single-pole double-throw switch (SPDT) of the 7th relay (DJKTJ), and the normally opened contact of first group of single-pole double-throw switch (SPDT) of the 7th relay (DJKTJ) connects 12V power supply ground;
The 12V current potential input of state-feedback circuit (3-5) connects an end of the coil of the 5th relay (JTXJ), the other end of the coil of the 5th relay (JTXJ) connects the normally opened contact of first limit switch (JTXK) single-pole double-throw switch (SPDT) by connector, the moving contact of first limit switch (JTXK) single-pole double-throw switch (SPDT) connects 12V power supply ground by this connector, the moving contact of first limit switch (JTXK) single-pole double-throw switch (SPDT) connects the moving contact of second limit switch (DKXK) single-pole double-throw switch (SPDT) simultaneously, the normally-closed contact of second limit switch (DKXK) single-pole double-throw switch (SPDT) connects an end of the 6th relay (DKXJ) coil, the 12V current potential input of the other end connection status feedback circuit (3-5) of the 6th relay (DKXJ) coil by this connector;
The one 24V pin of microcomputer detecting system (3-7) connects the normally opened contact of second group of single-pole double-throw switch (SPDT) of the 6th relay (DKXJ), the moving contact of second group of single-pole double-throw switch (SPDT) of the 6th relay (DKXJ) connects the KR1 pin of microcomputer detecting system (3-7), the KR2 pin of microcomputer detecting system (3-7) connects the normally opened contact of second group of single-pole double-throw switch (SPDT) of the 7th relay (DJKTJ), the moving contact of second group of single-pole double-throw switch (SPDT) of the 7th relay (DJKTJ) connects an end of the coil of the 2nd 24V pin of microcomputer detecting system (3-7) and the 7th relay (DJKTJ) simultaneously, and the other end of the coil of the 7th relay (DJKTJ) connects the KC pin of microcomputer detecting system (3-7);
One end of push rod executive circuit (3-6) is an equipment ground end (A), the other end is earth electrode end (B), described equipment ground end connects the moving contact of push rod executive circuit (3-6) single-pole double-throw switch (SPDT), and the earth electrode end connects the normally-closed contact of push rod executive circuit (3-6) single-pole double-throw switch (SPDT).
2. ground wire isolator according to claim 1 is characterized in that: it also comprises the transient state connector, and described transient state connector and switch contact are in parallel.
3. ground wire isolator according to claim 2 is characterized in that: described transient state connector is a discharge tube.
4. ground wire isolator according to claim 3 is characterized in that: described discharge tube adopts two utmost point ceramet gas discharge tubes, and model is BL1000-100kA.
5. ground wire isolator according to claim 1 is characterized in that: described switch contact adopts flat contact, and the model of flat contact is GC6-400A.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200305209U CN201910618U (en) | 2011-01-28 | 2011-01-28 | Ground wire isolator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200305209U CN201910618U (en) | 2011-01-28 | 2011-01-28 | Ground wire isolator |
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| CN201910618U true CN201910618U (en) | 2011-07-27 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520325A (en) * | 2012-01-05 | 2012-06-27 | 辽宁省电力有限公司丹东供电公司 | Centralized control cabinet for transformer sleeve test and use method thereof |
| CN104483605A (en) * | 2014-12-08 | 2015-04-01 | 介国安 | High-voltage motor insulation detector |
| CN107037328A (en) * | 2015-10-23 | 2017-08-11 | 马克西姆综合产品公司 | Double-current isolation barrier portion and monitoring system and method |
| CN108226730A (en) * | 2018-03-09 | 2018-06-29 | 北京纵横机电技术开发公司 | A kind of multichannel insulation pressure resistance automatic testing equipment and method |
| CN109510185A (en) * | 2018-12-07 | 2019-03-22 | 北京世纪瑞尔技术股份有限公司 | A kind of signal isolating device of anti-electric railway traction reflux interference |
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2011
- 2011-01-28 CN CN2011200305209U patent/CN201910618U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520325A (en) * | 2012-01-05 | 2012-06-27 | 辽宁省电力有限公司丹东供电公司 | Centralized control cabinet for transformer sleeve test and use method thereof |
| CN104483605A (en) * | 2014-12-08 | 2015-04-01 | 介国安 | High-voltage motor insulation detector |
| CN104483605B (en) * | 2014-12-08 | 2018-06-12 | 介国安 | High-voltage motor insulated detection device |
| CN107037328A (en) * | 2015-10-23 | 2017-08-11 | 马克西姆综合产品公司 | Double-current isolation barrier portion and monitoring system and method |
| CN107037328B (en) * | 2015-10-23 | 2020-11-13 | 马克西姆综合产品公司 | Dual current isolation barrier and monitoring system and method |
| CN108226730A (en) * | 2018-03-09 | 2018-06-29 | 北京纵横机电技术开发公司 | A kind of multichannel insulation pressure resistance automatic testing equipment and method |
| CN109510185A (en) * | 2018-12-07 | 2019-03-22 | 北京世纪瑞尔技术股份有限公司 | A kind of signal isolating device of anti-electric railway traction reflux interference |
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