CN203589725U - Voltage switching automatic paralleling device - Google Patents
Voltage switching automatic paralleling device Download PDFInfo
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- CN203589725U CN203589725U CN201320614241.6U CN201320614241U CN203589725U CN 203589725 U CN203589725 U CN 203589725U CN 201320614241 U CN201320614241 U CN 201320614241U CN 203589725 U CN203589725 U CN 203589725U
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Abstract
The utility model discloses a voltage switching automatic paralleling device which comprises three voltage transformers and three low-voltage relays. The three voltage transformers are connected with a phase A, a phase B and a phase C of a three-phase alternating-current power supply respectively. The three low-voltage relays are connected in parallel with voltage secondary circuits of the three voltage transformers respectively. Normally-open nodes (1) and (2) of the three low-voltage relays are connected in parallel and then are connected in series into a starting coil of a voltage parallel relay 3YQJ. Normally-closed nodes (3) and (4) of the three low-voltage relays are connected in series into a starting coil of a middle relay 1ZJ, so that isolation of primary voltage and secondary voltage is achieved. 1ZJ normally-open nodes (11) and (12) and air switch 1ZK normally-open auxiliary nodes (11) and (14) are connected in series and then are connected in parallel with buscouple isolation disconnectors and switch auxiliary nodes, and then the nodes are connected into a reset circuit of the 3YQJ of a voltage switching circuit. The device has the advantages that manual operation amount is small, switching reliability is high, and power grid operation safety is high.
Description
Technical field
The utility model relates to relay protection of power system equipment technical field, particularly, relates to a kind of voltage and switches automatic Synchronization device.
Background technology
Voltage a-b box, as the conventional a kind of automatics of Zong Zi transformer station, plays a part secondary voltage to switch with arranged side by side.The electric component connecting for the substation of single-trunk segmental wiring mode; when two sections of bus fanout operations; in order to guarantee that its primary system and electrical secondary system keep corresponding on voltage; avoid occurring protection or automatics malfunction, tripping, voltage secondary circuit claimed and automatics changes and synchronously switches in company with operational mode of main electrical scheme.
Whether voltage switching circuit is good, and can be directly connected to protection and automatics correct operation, even affects the safe and stable operation of electrical network.With isolating switch, often open auxiliary contact starting resistor and switch auxiliary relay 3YQJ, utilize its contact to realize the automatic switchover of voltage circuit.Due to the loose contact of isolating switch auxiliary node or to change the voltage switching circuit that the reason such as not in place causes abnormal, cause the improper fault arranged side by side of busbar voltage, to safety in production, bring great potential safety hazard.
Conventional voltage a-b box shunt circuit can only manual switchover, manually handle arranged side by side is got to and column position, forces to be communicated with two sections of busbar voltages.But frequent operation switches handle and may cause node loose contact, and can cause the circulation of two voltage transformers during overlong time arranged side by side.Under extreme case, may cause shunt circuit cisco unity malfunction, cause voltage secondary circuit broken string, latch-up protection, measurement meter will lose metering, affect the safe and stable operation of electrical network.
In realizing process of the present utility model, inventor find at least to exist in prior art manual operation amount large, switch the defects such as the low and safe operation of electric network of reliability is poor.
Utility model content
The purpose of this utility model is, for the problems referred to above, proposes a kind of voltage and switches automatic Synchronization device, to realize the advantage that manual operation amount is little, switching reliability is high and safe operation of electric network is good.
For achieving the above object, the technical solution adopted in the utility model is: a kind of voltage switches automatic Synchronization device, comprise respectively and the A phase of three-phase alternating-current supply, voltage transformer 1YHA, voltage transformer 1YHB and the voltage transformer 1YHC that B phase is connected with C, and under-voltage replay 1YJ, the under-voltage replay 2YJ and the low-voltage relay 3YJ that are attempted by respectively the voltage secondary circuit of described voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC;
Described under-voltage replay 1YJ often open node 1. 2., under-voltage replay 2YJ often open node 1. 2. with low-voltage relay 3YJ often open node 1. 2., after parallel connection, seal in the actuating coil of described voltage shunt circuit 3YQJ;
Further, above-described voltage switches automatic Synchronization device, also comprises and is arranged on the voltage secondary winding of described voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC and the switching intermediate voltage relay 1ZJ between its secondary circuit.
Further, described switching intermediate voltage relay 1ZJ, specifically comprises that model is the static intermediate voltage relay of JZ-7GY-441K.
The normally closed node of described under-voltage replay 1YJ 3. 4., the normally closed node of under-voltage replay 2YJ 3. 4. with the normally closed node of low-voltage relay 3YJ 3. 4., seal in successively the actuating coil of described auxiliary relay 1ZJ, to prevent that secondary voltage is to primary equipment reverse charge.Described auxiliary relay 1ZJ often open auxiliary node (11) (12) and sky open auxiliary node OF often open (11) (14) connect after the involution loop of access relay 3YQJ arranged side by side.The object of this design is when under-voltage replay moves, automatic Synchronization I, II section voltage, and involution auxiliary relay 1ZJ, and it is often opened node and opens.
Further, above-described voltage switches automatic Synchronization device, also comprises the measuring range for setting voltage to be measured, the maximum that gathers voltage to be measured and minimum value the man-machine interaction unit that shows and set under voltage reset mode;
Described man-machine interaction unit, is connected with the magnet exciting coil of low-voltage relay 3YJ with described under-voltage replay 1YJ, under-voltage replay 2YJ respectively; The measuring range of described voltage to be measured is the under voltage setting range of described under-voltage replay 1YJ, under-voltage replay 2YJ and low-voltage relay 3YJ.
Further, described man-machine interaction unit, comprise panel, for setting measuring range and the current reset mode of voltage to be measured, it is the button of hand-reset mode or the mode that automatically resets, for the maximum of automatic capturing voltage to be measured and the voltage sensor of minimum value, for showing the display screen of the measuring range of voltage to be measured, the maximum of voltage to be measured and minimum value and current reset mode, and for the hand-reset button of hand-reset;
Described button is arranged on panel, and described button is connected with display screen respectively with voltage sensor; Described voltage sensor and hand-reset button, be connected with the magnet exciting coil of low-voltage relay 3YJ with described under-voltage replay 1YJ, under-voltage replay 2YJ respectively.
Further, above-described voltage switches automatic Synchronization device, also comprises the earth leakage protective alternating current air switch 1ZK that is with in the voltage secondary circuit that is connected to described voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC;
The tripping alarm node SD of described air switch, is connected with voltage relay 3YQJ arranged side by side with the voltage auxiliary air switch of voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC.
Further, the normally closed node of the tripping alarm of described air switch (91) (92), seals in voltage and switches startup loop arranged side by side;
Further, described air switch, comprises C65N Series Circuit Breakers.
Further, described under-voltage replay 1YJ, under-voltage replay 2YJ and low-voltage relay 3YJ, all adopt JZ-7G series intermediate voltage relay;
The mounting means of described under-voltage replay 1YJ, under-voltage replay 2YJ and low-voltage relay 3YJ, is guide rails assembling.
Further, described under-voltage replay 1YJ, under-voltage replay 2YJ and low-voltage relay 3YJ, all adopt dial switch to adjust; Described under-voltage replay 1YJ, under-voltage replay 2YJ and low-voltage relay 3YJ, all have the housing containing binding post.
The voltage of each embodiment of the utility model switches automatic Synchronization device, owing to comprising voltage transformer 1YHA, 1YHB and the 1YHC being connected with C with A, the B of three-phase alternating-current supply respectively, and under-voltage replay 1YJ, the 2YJ and the 3YJ that are attempted by respectively the voltage secondary circuit of voltage transformer 1YHA, 1YHB and 1YHC; Under-voltage replay 1YJ, 2YJ and 3YJ often leave node, described under-voltage replay 1YJ often open node 1. 2., under-voltage replay 2YJ often open node 1. 2. with low-voltage relay 3YJ often open node 1. 2., seal in successively the actuating coil of the voltage shunt circuit 3YQJ of described voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC;
The normally closed node of described under-voltage replay 1YJ 3. 4., the normally closed node of under-voltage replay 2YJ 3. 4. with the normally closed node of low-voltage relay 3YJ 3. 4., seal in successively the actuating coil of described auxiliary relay 1ZJ, after 4. 3. its normally closed node opened, involution auxiliary relay, 9. node 2. 3., 4. 5., 8. disconnect, to prevent that secondary is to a reverse charge, auxiliary relay 1ZJ often open auxiliary node (11) (12) and sky open auxiliary node OF often open (11) (14) connect after the involution loop of access relay 3YQJ arranged side by side.At voltage, recover normal rear fanout operation automatically.
Further, described voltage switches the SD warning node of C65N/H circuit breaker employing electric auxiliaring device in automatic Synchronization device, this contact can be thereupon when normal running sky is opened deciliter, and its node can be thereupon not closed when fault trip, to prevent when secondary voltage circuit short circuit or the ground connection, sky is opened secondary circuit mistake that tripping operation causes side by side
Further, in described voltage switching automatic Synchronization device, the OF sky of the electric servicing unit of C65N/H circuit breaker is opened auxiliary node; Deciliter its state of opening along with sky changes thereupon, and after making to have leisure and cut-offfing out, it often opens node (11), (14) closure, and starting resistor shunt circuit is realized the automatic Synchronization of voltage circuit.
This function can be so that operating personnel needn't be switched handle arranged side by side, directly pulling open bis-skies of PT opens, this space-time is opened auxiliary node closure, make relay excitation arranged side by side, omitted this step of operation handle arranged side by side, reduce the PT time arranged side by side, effectively stopped to switch the not in place and decompression that loose contact causes of handle operation; Thereby can overcome the defect that in prior art, manual operation amount is large, switching reliability is low and safe operation of electric network is poor, to realize the advantage that manual operation amount is little, switching reliability is high and safe operation of electric network is good.
Other features and advantages of the utility model will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the utility model.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model with embodiment mono-of the present utility model, does not form restriction of the present utility model.In the accompanying drawings:
Fig. 1 is conventional voltage circuit winding diagram; In Fig. 1, G1, G2 are respectively 1,11 section of PT isolating switch auxiliary node; 1FG, 2FG are respectively mother 1,11 isolating switches, and DL is bus connection switch auxiliary node;
Fig. 2 is the winding diagram that the voltage secondary circuit of the utility model voltage switching automatic Synchronization device installs under-voltage replay additional; In Fig. 2,1YJ, 2YJ, 3YJ are under-voltage replay, and 1ZK is air switch, and ZJ is auxiliary relay node;
Fig. 3 is the operation principle schematic diagram (being voltage transformer secondary switching controls loop diagram) that the utility model voltage switches the heavily moving voltage relay of the normally closed node locking of under-voltage replay in automatic Synchronization device; In Fig. 3, G1, G2 are voltage transformer isolating switch auxiliary node;
Fig. 4 a(vertical view), Fig. 4 b(front view), Fig. 4 c(left/right view) for the utility model voltage, switch the external structure schematic diagram of voltage relay in automatic Synchronization device;
Fig. 5 is the SD warning node winding diagram that the utility model voltage switches the electric servicing unit of C65N/H circuit breaker in automatic Synchronization device;
Fig. 6 is the OF state instructs node winding diagram (being that OF sky is opened auxiliary contact structural representation) that the utility model voltage switches the electric servicing unit of C65N/H circuit breaker in automatic Synchronization device;
Fig. 7 is that the utility model voltage switches automatic Synchronization device IYJ (IIYJ) three-phase node schematic diagram in parallel [being the synthetic contact point structure schematic diagram of IYJ (IIYJ)];
Fig. 8 is the operation principle schematic diagram (i.e. voltage shunt circuit schematic diagram after transformation) that the utility model voltage switches automatic Synchronization device.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein is only for description and interpretation the utility model, and be not used in restriction the utility model.
According to the utility model embodiment, as Figure 1-Figure 8, provide a kind of voltage to switch automatic Synchronization device, comprise respectively and the A phase of three-phase alternating-current supply, voltage transformer 1YHA, voltage transformer 1YHB and the voltage transformer 1YHC that B phase is connected with C, and under-voltage replay 1YJ, the under-voltage replay 2YJ and the low-voltage relay 3YJ that are attempted by respectively the voltage secondary circuit of voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC; Under-voltage replay 1YJ often open node 1. 2., under-voltage replay 2YJ often open node 1. 2. with low-voltage relay 3YJ often open node 1. 2., seal in successively the actuating coil of the voltage relay arranged side by side of voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC; The involution loop of access relay 3YQJ arranged side by side after often the opening auxiliary node (11) (12) and sky and open auxiliary node OF and often open node (11) (14) and connect of auxiliary relay 1ZJ.At voltage, recover normal rear fanout operation automatically.
Here, under-voltage replay 1YJ, under-voltage replay 2YJ and low-voltage relay 3YJ, all adopt JZ-7G series voltage relay; The mounting means of under-voltage replay 1YJ, under-voltage replay 2YJ and low-voltage relay 3YJ, is guide rails assembling.Under-voltage replay 1YJ, under-voltage replay 2YJ and low-voltage relay 3YJ, all adopt dial switch to adjust; Under-voltage replay 1YJ, under-voltage replay 2YJ and low-voltage relay 3YJ, all have the housing containing binding post.
The voltage of above-described embodiment switches automatic Synchronization device, also comprises and is arranged on the voltage secondary winding of voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC and the switching intermediate voltage relay 1ZJ between voltage secondary circuit; The normally closed node of under-voltage replay 1YJ 3. 4., the normally closed node of under-voltage replay 2YJ 3. 4. with the normally closed node of low-voltage relay 3YJ 3. 4., seal in successively the wire loop that switches intermediate voltage relay 1ZJ; Switch the auxiliary node of intermediate voltage relay 1ZJ 2. 3., 4. 5., 8. 9., be connected between voltage transformer 1YHA, voltage transformer 1YHB and the secondary winding and voltage secondary circuit of voltage transformer 1YHC.Switch intermediate voltage relay 1ZJ, specifically comprise that model is the static intermediate voltage relay of JZ-7GY-441K.
The voltage of above-described embodiment switches automatic Synchronization device, also comprises the measuring range for setting voltage to be measured, the maximum that gathers voltage to be measured and minimum value the man-machine interaction unit that shows and set under voltage reset mode; Man-machine interaction unit, is connected with the magnet exciting coil of low-voltage relay 3YJ with under-voltage replay 1YJ, under-voltage replay 2YJ respectively; The measuring range of voltage to be measured is the under voltage setting range of under-voltage replay 1YJ, under-voltage replay 2YJ and low-voltage relay 3YJ.
Here, man-machine interaction unit, comprise panel, for setting measuring range and the current reset mode of voltage to be measured, it is the button of hand-reset mode or the mode that automatically resets, for the maximum of automatic capturing voltage to be measured and the voltage sensor of minimum value, for showing the display screen of the measuring range of voltage to be measured, the maximum of voltage to be measured and minimum value and current reset mode, and for the hand-reset button of hand-reset; Button is arranged on panel, and button is connected with display screen respectively with voltage sensor; Voltage sensor and hand-reset button, be connected with the magnet exciting coil of low-voltage relay 3YJ with under-voltage replay 1YJ, under-voltage replay 2YJ respectively.
The voltage of above-described embodiment switches automatic Synchronization device, comprises the earth leakage protective alternating current air switch of being with in the voltage secondary circuit that is connected to voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC; The tripping alarm node of air switch, is connected with voltage relay arranged side by side with the voltage auxiliary air switch of voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC.The normally closed node of tripping alarm (91) (92) of air switch, seals in the startup loop of voltage relay 3YQJ arranged side by side.This node can displacement when normal running, and can action message after loop short circuit tripping operation, disconnects its normally closed node (91) (92), cuts off voltage shunt circuit, to prevent secondary voltage mistake side by side.Described air switch, comprises C65N Series Circuit Breakers.
Compared with prior art, above-described embodiment voltage switches the implementation procedure of automatic Synchronization device, mainly comprises the following aspects:
(1) the application of under-voltage replay
Conventional voltage circuit wiring is: voltage transformer (potential transformer, abbreviation PT) body wiring forms loop after leading to terminal box, through PT disconnecting link auxiliary node, switch again, after switching, through bis-skies of PT, open (it is air switch that sky is opened), deliver to master-control room.When one group of PT need to overhaul, first operating personnel should manually switch to handle arranged side by side and column position, then pull open bis-skies of PT and open, and finally pull open PT disconnecting link.And voltage circuit is just arranged side by side after handle arranged side by side switches.
After using the loop of the applicant's transformation, operating personnel needn't be switched handle arranged side by side, directly pull open bis-skies of PT and open, and this space-time is opened the normally closed node of 1ZK auxiliary node OF (11) (12) closure, makes relay excitation arranged side by side.So just omit this step of operation handle arranged side by side, reduced the PT time arranged side by side, the more important thing is, effectively stopped switching handle operation not in place, the decompression that loose contact causes.While putting into operation PT, first drawing PT disconnecting link, then the secondary sky that closes opens 1ZK, just can complete operation, has simplified operating procedure, has guaranteed to greatest extent reliability.
Fig. 1 is the voltage circuit winding diagram (being conventional voltage circuit winding diagram) before improving.As shown in Figure 1: while normally moving, switch handle 7QK at open position, when needs I, II section secondary voltage are arranged side by side, need the 1. 2. node of manual closing handle 7QK, connect shunt circuit; During apportion, need equally the 3. 4. node of manual closing handle 7QK, connect involution loop.
(2) loop installs the application of under-voltage replay additional
Fig. 2 installs the schematic diagram of under-voltage replay additional at voltage secondary circuit.At the voltage secondary circuit of PT and meet under-voltage replay 1YJ, 2YJ, 3YJ, when voltage circuit brownout, for example PT once insures while disconnecting, under-voltage replay 1YJ, 2YJ, 3YJ action, often open node and 1. 2. seal in the actuating coil of relay 3YQJ arranged side by side, make coil magnetization, I, II section voltage paired running; The involution loop of access relay 3YQJ arranged side by side after often the opening auxiliary node (11) (12) and sky and open auxiliary node OF and often open node (11) (14) and connect of auxiliary relay 1ZJ.After voltage is normal, often open auxiliary node (11) (12) closure, the involution loop of starting relay arranged side by side, 3YQJ node is opened, voltage circuit fanout operation.
Voltage relay divides active voltage relay and passive electrical potential relay.The under-voltage replay this time adopting is active voltage relay, and for the protective relaying device of generator, transformer and transmission line, as the starting component of under voltage locking, main feature is as follows:
1. major loop consists of integrated circuit, has high accuracy and resetting ratio, and quick action, and power consumption is little, and setting range is wide, while using as under voltage relay, and the phenomenons such as friction, contact adhesion and de-axle;
2. adopt dial switch to adjust, intuitive and convenient;
3. there is higher antijamming capability and reliability;
4. the housing of voltage relay, containing terminal connections, substitutes all voltage relay series on market completely, convenient directly perceived.
The main feature of passive electrical potential relay is as follows:
1. without DC auxiliary supply, thoroughly solve interference and heating problem from DC power supply, greatly improved the reliability of work;
2. major loop consists of thick film circuit: there is high accuracy, resetting ratio, and quick action, power consumption is little, setting range is wide, while using as under-voltage replay, friction, contact adhesion, de-axle phenomenon;
3. this voltage relay adopts toggle switch to adjust, intuitive and convenient;
4. there is very high antijamming capability and reliability.
Voltage at above-described embodiment switches in automatic Synchronization device, and the voltage relay of selecting, should have following characteristic:
1. return time: use the method for cutting off circuit, make voltage relay power-off, voltage relay return time is not more than 30mS; Except power cut off delay class time voltage relay;
2. supply voltage allows mobility scale: variation in voltage is rated voltage 0.8 to 1.1 times;
3. contact capacity: voltage relay output contact can disconnect and be not more than 250V, and the direct current inductive load circuit that time constant is 5 ± 0.75ms is 50W; The alternating current circuit that voltage is not more than 250V is 50VA, and voltage relay can be connected the electric current of 5A for a long time;
4. power consumption: be all not more than 5W under rated voltage; 5. ambient temperature :-10 ℃ ~+50 ℃; 6. dielectric strength: each conducting terminal of voltage relay connects together between the non-live metal part exposing or shell, can bear 2000V effective value alternating voltage, lasts test in 1 minute and naked punctures or arcing phenomena;
7. insulation resistance: each conducting terminal of voltage relay connects together between the non-metallic part exposing and shell, measures its insulation resistance be not more than 300M Ω with the megohmmeter of open circuit voltage 500V; 8. electric life voltage relay contact node is connected in the circuit load of specified volume, and electric life is 100000 times; 9. interference free performance: voltage relay disturbs and meets the protection of DL478-92 < < static votage relay and automatic safety device general technical specifications > >.
At above-described embodiment voltage, switch in automatic Synchronization device, the operation principle of voltage relay comprises: under voltage and decompression output type are same voltage relay, when detecting voltage, is greater than under voltage set point, the output voltage actuating of relay; When detecting voltage lower than under voltage set point or decompression, and the duration surpass the under voltage delay adjustments time, output voltage relay discharges; Under voltage setting range is measuring range, by panel button, arranges; The maximum of the tested voltage of automatic capturing and minimum value also show; Under voltage reset has automatically optional with manual two kinds of modes.At this voltage, switch in automatic Synchronization device, the mounting means of voltage relay is guide rails assembling.
(3) loop installs the application of intermediate voltage relay additional
Fig. 3 is the heavily moving voltage relay schematic diagram of the normally closed node locking of under-voltage replay.The normally closed node of under-voltage replay 1YJ, 2YJ and 3YJ seals in the wire loop that switches intermediate voltage relay ZJ, disconnects the auxiliary node of switching intermediate voltage relay 1ZJ 2. 3., 4. 5., 8. 9., to realize the isolation of voltage circuit first and second.
The model used of static intermediate voltage relay can be the upper Hailin of JZ-7GY-441K(person of outstanding talent Electric Applicance Co., Ltd), operating voltage is 220V DC.The technical characterstic of static intermediate voltage relay is as follows:
1. brand-new mounting means, can rail type installs and also can fixedly mount, and installs attractive in appearancely, and volume is little, and easy-to-connect is directly perceived;
2. adopt high-performance sealed voltage relay, protection against the tide, dustproof, do not break, reliability is high;
3. operation voltage is accurate, and resetting ratio is high, and non-jitter is low in energy consumption, and a plurality of nodes move simultaneously or return (controllability 100%);
4. after voltage relay action, there is lamplight pointing, have power supply indication;
5. the electrical endurance of voltage relay and mechanical endurance are long;
6. dielectric voltage withstand level is high, and contact capacity is large, and contact contact resistance is little;
7. noiseproof feature is good, applicable to the place of strong jamming or supply voltage poor quality;
8. need not be that contact form design is considered as old type tube, novel multiconductor form, facilitates type selecting.
Intermediate voltage relay divides the conventional voltage relay of quick action type, the middle electrical voltage relay of on-delay type, power cut off delay intermediate voltage relay etc.JZ-7G series intermediate voltage relay is for various protections and automatic control equipment, to increase the contact capacity of protection and control loop.This serial intermediate voltage relay adopts static electronic control circuit to control the middle conducting simultaneously of a plurality of sealing imports or disconnection.JZS-7G guide track series is installed intermediate voltage relay (being rail type intermediate voltage relay), for various protections and automatic control equipment, to increase the contact capacity of protection and control loop.This serial intermediate voltage relay adopts static electronic control circuit to control the middle conducting simultaneously of a plurality of sealing imports or disconnection, has following performance and feature:
1. time of free adjustment on-delay or power cut off delay as required;
2. energy storage time lagged type intermediate voltage relay, energising moment capacitance energy storage, voltage relay is set and is gone to control that intermediate voltage relay disconnects or action according to user by digital circuit, thereby reaches time delay object.
The major parameter of JZS-7G series intermediate voltage relay is as follows:
1. return time: the method cutting off circuit, make voltage relay power-off, voltage relay return time is not more than 30mS; Except power cut off delay class time voltage relay; 2. supply voltage allows mobility scale: variation in voltage is 0.8 to 1.1 times of rated voltage, also can wide power circuit; 3. contact capacity: voltage relay output contact can disconnect and be not more than 250V, and the direct current inductive load circuit that time constant is 5 ± 0.75mS is 50W; The alternating current circuit that voltage is not more than 250V is 50VA, and voltage relay can be connected 5A electric current for a long time; 4. power consumption: be all not more than 5W under rated voltage; 5. ambient temperature :-10 ℃ ~+50 ℃; 6. dielectric strength: each conducting terminal of voltage relay connects together between the non-live metal part exposing or shell, can bear 2000V effective value) alternating voltage, lasts test in 1 minute and naked punctures or arcing phenomena;
7. insulation resistance: each conducting terminal of voltage relay connects together between the non-metallic part exposing and shell, measures its insulation resistance be not more than 300M Ω with the megohmmeter of open circuit voltage 500V; 8. electric life voltage relay contact node is connected in the circuit load of specified volume, and electric life is 100000 times; 9. interference free performance: voltage relay disturbs and meets the protection of DL478-92 < < static votage relay and automatic safety device general technical specifications > >.
(4) loop installs discussion and the application of air switch and auxiliary node thereof, warning node additional
When short trouble appears in voltage secondary circuit, secondary sky is opened tripping operation, and at this moment the closed shunt circuit of connecting of auxiliary node, causes the mistrip in normal loop.For fear of this phenomenon; the applicant adopts and is with earth leakage protective interchange sky to open; when a certain section of voltage circuit trips because of short circuit; sky is opened automatic dropout; open failure loop, because its normally closed node of reporting to the police has sealed in the startup loop of voltage relay arranged side by side, normally closed opening during fault; cut off and start side by side loop, forbid voltage secondary circuit mistake side by side.
Air switch and auxiliary node thereof model used: through investigation comparison, select and use Schneider C65N Series Circuit Breakers.C65 series of products have following feature:
1. on the basis of, matured product good with France, considered that the specific (special) requirements of Chinese low-voltage distribution is due to C65 series on the basis of products C 60 series very ripe with reference to overseas market, and meet the supplementary provisions of Chinese low pressure market to switch safety completely, so it is when meeting IEC898 standard, also reach GB10963-1999, the requirement of GB16917.Just because of this, it is awarded CCE safety certification book.
2. more more full ranges of choice and stronger performance, meet the breaking capacity that require C65 series of products of different field to distribution, shock-resistant voltage, and overvoltage protection, the important technological parameters such as quick-make are all significantly improved than C45; Also increased product variety, can meet the demand of different user simultaneously.
3. the auxiliary and the annex that more enrich more convenient installation are provided, really meet the needs of automation control when people are more and more higher to the safety requirements of electric product, everybody is more and more simpler to also hope is installed.C65 Series Circuit Breakers, installing of auxiliary and Vigi earth leakage protective annex being accomplished to not only safety but also simple, can, not by any instrument, directly be installed.These abundant auxiliaries of while, as OF auxiliary node, SD warning node, MX+OF shunted exciter tripping unit, MN undervoltage tripping unit, and CT contactor, TL voltage relay, IH timing switch, IHP programmable Timer switch, can meet the requirement of automation control system.
4. superpower performance: breaking capacity is significantly improved compared with C45 miniature circuit breaker, and the breaking capacity of all load current values is identical; Wherein: C65N is 6 000A(IEC898) C65H is 10000A(IEC898) there are two kinds of protective features of C/D type, rated current scope is more complete, and the rated current scope of C/D type is 1 ~ 63A;
5. isolation features: meet in GB14048.2 standard the supplementary safety requirements with the circuit breaker of isolation features, be different from C45 miniature circuit breaker:
A, the impulse withstand voltage that can bear are brought up to 6kV;
B, handle have green color stripe to show that contact is really in open position;
C, the supper-fast closure in contact and disjunction.
6. VigiC65 earth leakage protective annex: creepage accessory has two rated current grade: 32A/63A; The instantaneous trip value of making protection of people electric shock is 30mA.Earth leakage protective annex has respectively two kinds of releases of electromagnetic type/electronic type; they have filter, can effectively prevent the misoperation that instantaneous voltage changes and surge current causes, electronic type need have 50V trouble free service voltage; 1P+N, 2P electronic leakage annex also has:
7. 280V overvoltage protection is to meet the need of market
A, automatic control function:
Multiple electrical accessory, as OF auxiliary node, SD warning node, MX+OF shunted exciter tripping unit, MN undervoltage tripping unit, and the control apparatus element of multi9 series, as CT contactor, TL voltage relay etc. can coordinate with circuit breaker, realize the automation of low-voltage distribution system is controlled.
B, easily installation:
Aspect convenient installation, wiring, there is the advantage larger than C45: circuit breaker (MCB) is more perfect safer with the combination of earth leakage protective annex (VigiC65).DIN (double card position the is U-shaped) symmetry orbital of adopting international standards is installed, and breaker connecting terminal can connect pectination line bank and wire, and wire maximum cross-section can reach 35mm2.
C, assurance operation are used safer: multipole circuit breaker is installed interpolar barrier and guaranteed wiring safety; Handle can install snap close additional, prevents misoperation; By installing rotary handle additional, can improve degree of protection simultaneously.
C65N circuit breaker has following functions: short-circuit protection, overload protection, control, C65N circuit breaker can be used for terminal distribution and industrial equipment.C65N circuit breaker technical parameter is as follows:
1. electric parameter
Rated voltage: 440V AC;
Breaking capacity (IEC898), sees table:
Current limliting grade: 3;
Quick-make: guarantee the reliably working of impact load, extend the electrical endurance of circuit breaker;
Mechanical endurance (O-C): 20000 times;
2. environment
Moisture-resistant is hot: 2 classes (during 55 ° of C of temperature, relative humidity 95%);
Referential weight (gram), referring to little table:
Wiring: terminal connections area:
25A and connect 16mm2 multiply flexible cord below, or 25mm2 sub-thread rigid line;
32A to 63A can connect 25mm2 multiply flexible cord, or 35mm2 sub-thread rigid line;
3. C type curve:
Protection conventional load and distributing cable;
The electric parameter of C type curve:
During rated current: 1 ~ 63A(30 ° of C);
Tripping characteristic: instantaneous trip 5 ~ 10In;
4. D type curve:
The impact load that protection starting electric current is large (motor, transformer);
The electric parameter of D type curve:
During rated current: 1 ~ 63A(30 ° of C);
Tripping characteristic: instantaneous trip 10 ~ 14In;
5. quality approval:
Meet IEC 898/ GB 10963-1999;
Obtain CCEE safety certification certificate.
The C65 circuit breaker of selecting, rated current 40A, product type C type 17878.Vigi C65 earth leakage protective annex 30mA wink ejector half, AC class ELM/ELE electromagnetic type/electronic type.Vigi C65 earth leakage protective annex, and 1 utmost point, 2 utmost points, 3 utmost points and assembled can the providing of 4 utmost point C65N/H type circuit breaker:
1. indirect contact protection;
2. the directly supplementary protection (30mA) of contact;
3. insulation of electrical installation error protection;
4. wink ejector half;
5. guarantee instantaneous trip (non-time delay);
6. AC class, for AC sine wave.Earth leakage protective annex and circuit breaker combination: C65 circuit breaker+Vigi earth leakage protective annex=residual current circuit breaker.
The related description of Vigi C65 ELM electromagnetic leakage protection annex is as follows:
1. electromagnetic leakage protection annex, operates without any need for accessory power supply, and VigiC65 annex inside is comprised of residual current voltage relay and zero sequence current mutual inductor;
2. technical data
Prevent the misoperation that temporary overvoltage (lightning, electric grid operating etc.) causes;
Thread off and indicate: on Vigi accessory operation handle, have red electric leakage dropout indication;
Rated residual operating current: 30 mA;
Rated voltage: 230/400V AC, 50HZ;
Rated current: In=32A, In=63A;
Manually control: handle allows two kinds of reset modes: simultaneously reset circuit breaker and electric leakage device of circuit breaker and electric leakage device resets respectively, and creepage accessory first resets, and after circuit breaker, resets.Weight (gram), see table:
3. wiring
In=32A creepage accessory can meet 16mm
2multiply flexible cord or 25mm
2sub-thread rigid line;
In=63A creepage accessory can meet 25mm
2multiply flexible cord or 35mm
2sub-thread rigid line;
4. standard: meet IEC1009-1/GB 16917 standards and obtain CCEE safety certification certificate;
5. note: the Vigi creepage accessory of In=32A has special device, can prevent that it and rated current are greater than the C65 circuit breaker of 32A assembled.
The electric servicing unit of C65N/H circuit breaker, referring to Fig. 5 (SD warning node) and Fig. 6 (OF state instructs node).SD warning node circuit breaker failure sends while threading off on signal front panel machinery indication, can thread off by indication fault.The splitting or integrating state of OF auxiliary node indication circuit breaker.The technical data of the electric servicing unit of C65N/H circuit breaker is as follows:
1. meet standard: IEC 947-2;
2. auxiliary contact rated current, sees table:
Wiring screw thread compressing tablet terminal, can connect 1 or 2 maximum cross-section is 2.5mm
2wire, terminal is other distinguishing mark.
Above-described embodiment voltage switches automatic Synchronization device, and the function that can realize comprises:
(1) the effect reaching:
1. use the normally closed node of PT disconnecting link to form shunt circuit, out of service at the PT of maintenance, when disconnecting link pulls open, starting shunt circuit;
2. use bis-skies of PT to open auxiliary node, after pulling open bis-skies of PT and opening, starting shunt circuit;
That 3. uses under-voltage replay often opens node, starting shunt circuit;
4. after the tripping operation of auxiliary air switch fault, do not allow paired running;
(2) economic benefit after transforming:
After transformation, the failure rate of voltage circuit by before 40%, reduce to below 5%.Produce a desired effect completely.Implement to reduce altogether over the past half year the about 180000kWh of electric weight because of the loss of PT broken string, by 0.500 yuan of calculating of company's total rate of electricity, can save defect elimination maintenance cost and be about: 90,000 yuan.
Compare with conventional switching circuit, the voltage of above-described embodiment switches automatic Synchronization device, at least can reach following beneficial effect:
(1) that uses under-voltage replay often opens node, starting shunt circuit.
Conventional switching circuit, just, artificial in the situation that, manual or remote control is carried out, and whether does not normally so just know to switch voltage in the past.Through the transformed loop of the applicant, the voltage transformer secondary voltage of operation is during lower than a certain value, and it just automatically switches on the loop of normal reach voltage and moves; If when this section of voltage recovers normal value, it can cross again a switching circuit involution, still uses the secondary voltage of former instrument transformer.
(2) after the tripping operation of auxiliary air switch fault, do not allow paired running.
Conventional switching circuit, auxiliary air switch trip, there is fault in the next stage loop that proves it, as phenomenons such as short circuit, ground connection, if switched blindly, will inevitably cause two sections of equal dead electricity of voltage transformer secondary, so not only not play the effect of switching, but also the voltage secondary circuit of normal operation is switched in fault loop.Through the transformed loop of the applicant, utilize air switch tripping alarm node control, just there will not be this phenomenon, it also can meet service requirement completely.
Finally it should be noted that: the foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although the utility model is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (9)
1. a voltage switches automatic Synchronization device, it is characterized in that, comprise respectively and the A phase of three-phase alternating-current supply, voltage transformer 1YHA, voltage transformer 1YHB and the voltage transformer 1YHC that B phase is connected with C, and under-voltage replay 1YJ, the under-voltage replay 2YJ and the low-voltage relay 3YJ that are attempted by respectively the voltage secondary circuit of described voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC;
Described under-voltage replay 1YJ often open node 1. 2., under-voltage replay 2YJ often open node 1. 2. with low-voltage relay 3YJ often open node 1. 2., after parallel connection, seal in the actuating coil of the voltage relay 3YQJ arranged side by side of described voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC;
After auxiliary relay 1ZJ often leaves auxiliary node (11) (12) and sky and opens 1ZK and often open auxiliary node (11) (14) and connect again with manual control handle 3. 4., the auxiliary node of bus connection switch and isolation switch thereof seals in the involution coil of the relay 3YQJ arranged side by side of voltage switching circuit after in parallel jointly.
2. voltage according to claim 1 switches automatic Synchronization device, it is characterized in that, also comprise and be arranged on the voltage secondary winding of described voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC and the switching intermediate voltage relay 1ZJ between voltage secondary circuit;
3. 4. the normally closed node of described under-voltage replay 1YJ, 2YJ, 3YJ, seals in the wire loop that switches intermediate voltage relay 1ZJ successively; The auxiliary node of described switching intermediate voltage relay 1ZJ 2. 3., 4. 5., 8. 9., be connected between the voltage secondary winding and secondary circuit of voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC, to realize first and second isolation, prevent voltage circuit reverse charge.
3. voltage according to claim 2 switches automatic Synchronization device, it is characterized in that described switching intermediate voltage relay 1ZJ specifically comprises that model is the static intermediate voltage relay of JZ-7GY-441K.
4. voltage according to claim 1 and 2 switches automatic Synchronization device, it is characterized in that, also comprise the measuring range for setting voltage to be measured, the maximum that gathers voltage to be measured and minimum value the man-machine interaction unit that shows and set under voltage reset mode;
Described man-machine interaction unit, is connected with the magnet exciting coil of low-voltage relay 3YJ with described under-voltage replay 1YJ, under-voltage replay 2YJ respectively; The measuring range of described voltage to be measured is the under voltage setting range of described under-voltage replay 1YJ, under-voltage replay 2YJ and low-voltage relay 3YJ.
5. voltage according to claim 4 switches automatic Synchronization device, it is characterized in that, described man-machine interaction unit, comprise panel, for setting measuring range and the current reset mode of voltage to be measured, it is the button of hand-reset mode or the mode that automatically resets, for the maximum of automatic capturing voltage to be measured and the voltage sensor of minimum value, for showing the display screen of the measuring range of voltage to be measured, the maximum of voltage to be measured and minimum value and current reset mode, and for the hand-reset button of hand-reset;
Described button is arranged on panel, and described button is connected with display screen respectively with voltage sensor; Described voltage sensor and hand-reset button, be connected with the magnet exciting coil of low-voltage relay 3YJ with described under-voltage replay 1YJ, under-voltage replay 2YJ respectively.
6. voltage according to claim 1 and 2 switches automatic Synchronization device, it is characterized in that, also comprise the earth leakage protective alternating current air switch 1ZK that is with in the voltage secondary circuit that is connected to described voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC;
The normally closed node of SD tripping alarm (91) of described air switch 1ZK, (92), be connected with the actuating coil of voltage relay 3YQJ arranged side by side with the voltage auxiliary air switch of voltage transformer 1YHA, voltage transformer 1YHB and voltage transformer 1YHC, invariant position when this node is opened at normal running sky, and open its normally closed node (91), (92) when loop short circuit is tripped, cut off voltage shunt circuit, in case voltage shunt circuit misoperation and two sections of whole dead electricity of bus causing during the fault trip of non-return road;
The normally closed node (11) (12) that sky is opened auxiliary node OF seals in the actuating coil of relay 3YQJ arranged side by side, and sky is opened the involution coil of often opening access relay 3YQJ arranged side by side after often the opening node (11) (12) and connect of node (11) (14) and auxiliary relay 1ZJ of auxiliary node OF.
7. voltage according to claim 6 switches automatic Synchronization device, it is characterized in that described air switch comprises C65N Series Circuit Breakers.
8. voltage according to claim 1 switches automatic Synchronization device, it is characterized in that described under-voltage replay 1YJ, under-voltage replay 2YJ and low-voltage relay 3YJ all adopt JZ-7G series intermediate voltage relay;
The mounting means of described under-voltage replay 1YJ, under-voltage replay 2YJ and low-voltage relay 3YJ, is guide rails assembling.
9. voltage according to claim 1 switches automatic Synchronization device, it is characterized in that described under-voltage replay 1YJ, under-voltage replay 2YJ and under-voltage replay 3YJ all adopt dial switch to adjust; Described under-voltage replay 1YJ, under-voltage replay 2YJ and under-voltage replay 3YJ, all have the housing containing binding post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320614241.6U CN203589725U (en) | 2013-10-08 | 2013-10-08 | Voltage switching automatic paralleling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320614241.6U CN203589725U (en) | 2013-10-08 | 2013-10-08 | Voltage switching automatic paralleling device |
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| CN203589725U true CN203589725U (en) | 2014-05-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515956A (en) * | 2013-10-08 | 2014-01-15 | 国家电网公司 | Voltage switching automatic paralleling device |
| CN110412322A (en) * | 2019-09-10 | 2019-11-05 | 广东电网有限责任公司 | A kind of plant stand electrical energy measurement secondary voltage switching device |
-
2013
- 2013-10-08 CN CN201320614241.6U patent/CN203589725U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515956A (en) * | 2013-10-08 | 2014-01-15 | 国家电网公司 | Voltage switching automatic paralleling device |
| CN110412322A (en) * | 2019-09-10 | 2019-11-05 | 广东电网有限责任公司 | A kind of plant stand electrical energy measurement secondary voltage switching device |
| CN110412322B (en) * | 2019-09-10 | 2024-03-19 | 广东电网有限责任公司 | Secondary voltage switching device for station electric energy metering |
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Granted publication date: 20140507 Termination date: 20171008 |