CN205753345U - A kind of phase-lacking protective device - Google Patents
A kind of phase-lacking protective device Download PDFInfo
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- CN205753345U CN205753345U CN201620106490.8U CN201620106490U CN205753345U CN 205753345 U CN205753345 U CN 205753345U CN 201620106490 U CN201620106490 U CN 201620106490U CN 205753345 U CN205753345 U CN 205753345U
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- phase
- catalyst
- supply system
- power supply
- shortage
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Abstract
The utility model discloses a kind of phase-lacking protective device; for being connected between three-phase power supply system and three phase electric equipment; including: two transformators; the non-same polarity of two transformer is connected respectively to the neutral conductor (N); the secondary coil of two transformators is in series; forming series circuit, one end of described series circuit is connected to the neutral conductor (N)；Described transformator is when the circuit phase shortage of corresponding phase being detected, the Same Name of Ends of described transformer is connected to the neutral conductor (N), non-same polarity is connected to the neutral conductor (N), and the other end of described series circuit is connected to the corresponding phase of electrical equipment.This utility model can be substituted by other two-phase synthesis third phase, thus rebuild three phase supply in the case of three-phase power supply system occurs arbitrarily to lack a phase.
Description
Technical field
This device relates to alternating electromotive force dispensing, protecting electrical power system field, particularly relates to a kind of phase-lacking protective device.
Background technology
CN 204732875 U describes a kind of open phase protector, employ three transformators constitute arbitrarily lack a phase can
The unsteady flow topology recovered.There are the transformator needs of each mutually corresponding access and must be shorted when this phase phase shortage in this technology, phase
When the transformator being shorted in this is not involved in recovering the waste of the unsteady flow of phase shortage.
Utility model content
(1) to solve the technical problem that
This utility model designs for the problems referred to above, eliminates this transformator being not involved in unsteady flow.Reduce cost, simplify
Scheme.
(2) technical scheme
In order to solve above-mentioned technical problem, this utility model provides a kind of phase-lacking protective device, is used for being connected to three-phase and supplies
Between electricity system and three phase electric equipment, including: two transformators, the non-same polarity of two transformer connects respectively
To the neutral conductor, the secondary coil of two transformators is in series, and forms a series circuit, during one end of described series circuit is connected to
Property line；
In the first state, the Same Name of Ends of two transformer disconnects with three-phase power supply system, described series electrical
Another termination zero load on road, three phase lines of three-phase power supply system are connected respectively to the corresponding phase of three phase electric equipment；
When the existence mutually of three-phase power supply system lacks a phase time, the Same Name of Ends of two transformer and three phase supply system
Uniting and other two be connected, the phase line of described three-phase power supply system phase shortage is connected to the other end of described series circuit, the most biphase
Connection corresponding with the phase line of three phase electric equipment.
Preferably, described first state is to there is not non-full-phase state in three-phase power supply system.
Preferably, two transformators are the first transformator, the second transformator respectively, also include the first catalyst, second connect
Tentaculum, the 3rd catalyst, the 4th catalyst, the 5th catalyst, the 6th catalyst, the 7th catalyst, the 8th catalyst, the 9th connect
Tentaculum, the Same Name of Ends of described first transformer connect the first catalyst, the 4th catalyst, the 7th catalyst normally opened
Contact, described first catalyst, the 4th catalyst, the 7th catalyst movable contact respectively with the first phase in three-phase power supply system
Connect, first be connected, second be connected；The Same Name of Ends of described second transformer connect the second catalyst, the 5th
Catalyst, the normally opened contact of the 8th catalyst, described second catalyst the 5th catalyst, the 8th catalyst movable contact respectively with
In three-phase power supply system second is connected, third phase connects, third phase connects；
The non-same polarity of described first transformer secondary coil connects the 3rd catalyst, the 6th catalyst, the 9th catalyst
Normally opened contact, described 3rd catalyst, the 6th catalyst, the movable contact of the 9th catalyst are connected respectively to three phase electric equipment
Third phase, the second phase, the first phase, described 3rd catalyst, the 6th catalyst, the 9th catalyst normally-closed contact connect three-phase
The third phase of electric power system, the second phase, the first phase；The non-same polarity of described second transformer secondary coil connects the first transformator
The Same Name of Ends of secondary coil；The Same Name of Ends of described second transformer secondary coil connects three-phase power supply system and three phase electric equipment
The neutral conductor.
Preferably, when there is phase shortage in the first phase in three-phase power supply system, the 7th catalyst, the 8th catalyst, the 9th
The movable contact of catalyst is changed simultaneously and is closed to corresponding normally opened contact.
Preferably, when there is phase shortage in the second phase in three-phase power supply system, the 4th catalyst, the 5th catalyst, the 6th
The movable contact of catalyst is changed simultaneously and is closed to corresponding normally opened contact.
Preferably, when there is phase shortage in the third phase in three-phase power supply system, the first catalyst, the second catalyst, the 3rd
While the movable contact of catalyst, conversion closes to corresponding normally opened contact.
Preferably, also include phase shortage circuit for detecting, be used for detecting in three-phase power supply system whether phase shortage, and control transformator
Primary coil Same Name of Ends is connected to corresponding phase or the neutral conductor of three-phase power supply system, and for controlling the right of three phase electric equipment
The corresponding phase in the other end of series circuit or three-phase power supply system should be connected to.
Preferably, described phase shortage circuit for detecting includes the first phase shortage circuit for detecting, the second phase shortage circuit for detecting, the 3rd phase shortage
Circuit for detecting, corresponding with three-phase power supply system is respectively connected.
(3) beneficial effect
Technique scheme has the advantage that this utility model devises a kind of device, can realize CN
On the premise of function described in 204732875 U, simplify scheme, saved cost, also make volume weight be optimized.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model；
Fig. 2 is the first view of phase-lacking protective device of the present utility model；
Fig. 3 is the second view of phase-lacking protective device of the present utility model；
Fig. 4 is the third state schematic diagram of phase-lacking protective device of the present utility model；
Fig. 5 is the 4th view of phase-lacking protective device of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, detailed description of the invention of the present utility model is described in further detail.Below
Embodiment is used for illustrating this utility model, but is not limited to scope of the present utility model.
As it is shown in figure 1, be theory diagram of the present utility model, by input three-phase alternating-current supply 11, phase shortage synthesis transformator
Group 12 and circuit conditioning module 13 and three phase electric equipment 14 form.
Shown in Fig. 2, phase shortage synthesis transformer group 7 operation principle: phase shortage synthesis transformer group is to utilize three-phase alternating current
The feature of each difference of electricity 120 degree, applies 120 degree of every two groups of vector additions of phase difference signal to negate the principle equal to third phase.Should
Solve by this principle to have only to use the primary Same Name of Ends of 2 transformators, i.e. two transformators during the phase shortage synthesis of fixing phase
Connecing the most biphase phase line respectively, two non-same polarities all connect to neutral, after secondary Same Name of Ends is sequentially connected in series with non-same polarity,
Remaining Same Name of Ends connects to neutral, and remaining non-same polarity i.e. exports the third phase synthesized.
As a example by synthesis C phase, i.e. (mathematical formulae is expressed as-(SinA+Sin (A+120 degree))=Sin (A+240 to A+B=-C
Degree).A phase is respectively connected to the in-phase input end of the primary coil of two transformators with B phase, and non-same polarity connects to neutral N, secondary wire
After circle series connection, Same Name of Ends connects to neutral, and exports C phase CC of a synthesis at non-same polarity.
In like manner, with transformer group 7 shown in Fig. 2, change input biphase, it is also possible to obtain other third phase, the most any one
Phase phase shortage can by this transformer group by other two-phase synthesis out.Therefore, in circuit conditioning module, (input and output contact
Device 4,5,6 compositions) under effect, phase shortage synthesis transformer group 7 is multiplexed to the situation of any phase shortage.Phase shortage is made to synthesize transformer group
7 cut and exit power supply automatically, and load is also automatically switched automatically between directly power supply and synthesis power supply.Control the simplest
Clean.
This utility model is multiplexed to any three-phase lack phase can be automatically synthesized to realize phase shortage synthesis transformer group 7
The function substituted, the technical scheme of employing is as follows:
1. device is by input phase failure circuit for detecting 1,2,3, input and output catalyst 4,5,6, synthesizes transformer group 7 three part
Composition.
2. phase shortage circuit for detecting 1,2,3 respectively to A B C phase voltage carry out phase shortage judgement, drive input and output catalyst 4,
5,6 action.
4. input and output catalyst 4,5,6 can be equivalent to a triac device respectively.Following relate to input and output
The movable contact of catalyst P1, P2, P3, P4, P5, P6, P7, P8, P9 in catalyst 4,5,6 connects with each self-corresponding normally-closed contact
Fig. 2 is shown in the definition of logical position, and the opposite side contact being not turned in Fig. 2 is defined as normally opened contact.
5. synthesis transformer group 7 is made up of two transformators 8,9, and the primary coil non-same polarity of two transformators 8,9 connects
Neutral conductor N, Same Name of Ends connects P1/P2, P4/P5, P7/P8 normally opened contact of input and output catalyst 4,5,6 successively；Two transformators
Secondary be sequentially connected in series after, Same Name of Ends connects to neutral N, and non-same polarity meets catalyst P3, P6, P9 in input and output catalyst
Normally opened contact；The 3rd catalyst P3 normally-closed contact in input and output catalyst is connected with input C；In input and output catalyst
The 6th catalyst P6 normally-closed contact with input B be connected；The 9th catalyst P9 normally-closed contact in input and output catalyst with
Input A is connected.
6. the first catalyst P1 movable contact in input and output catalyst connects three phase mains A phase；Second catalyst P2 is dynamic to be touched
Point connects three phase mains B phase；3rd catalyst P3 movable contact is connected with output CC；C phase phase shortage opening and closing often is closed, normally closed disconnection.C
When powering normal mutually, normally opened disconnection, normally closed Guan Bi.
7. the 4th catalyst P4 movable contact in input and output catalyst connects three phase mains A phase；5th catalyst P5 is dynamic to be touched
Point connects three phase mains C phase；6th catalyst P6 movable contact is connected with output BB；B phase phase shortage opening and closing often is closed, normally closed disconnection.B
When powering normal mutually, normally opened disconnection, normally closed Guan Bi.
8. the 7th catalyst P7 movable contact in input and output catalyst connects three phase mains B phase；8th catalyst P8 is dynamic to be touched
Point connects three phase mains C phase；9th catalyst P9 movable contact is connected with output AA；A phase phase shortage opening and closing often is closed, normally closed disconnection.A
When powering normal mutually, normally opened disconnection, normally closed Guan Bi.
Work process:
1. without phase shortage: as in figure 2 it is shown, phase shortage circuit for detecting 1,2,3 drives the catalyst in input and output catalyst 4,5,6
The movable contact of P1, P2, P3, P4, P5, P6, P7, P8, P9 connects (position shown in Fig. 2) with each self-corresponding normally-closed contact simultaneously.
So, the Same Name of Ends open circuit of the primary coil of synthesis transformator 8,9；A B C three-phase be fed directly load end AA BB CC；Close
The Same Name of Ends after the secondary coil series connection of transformer group is become to connect to neutral；Non-same polarity output is suspended.
2. lack A phase: as it is shown on figure 3, the first phase shortage circuit for detecting 1 drives the 7th catalyst P7 of catalyst 6, the 8th contact
Device P8, the movable contact of the 9th catalyst P9 are changed simultaneously and are closed (position shown in Fig. 3) to corresponding normally opened contact；Second phase shortage
Circuit for detecting the 2, the 3rd phase shortage circuit for detecting 3 drives moving of catalyst P1, P2, P3, P4, P5, the P6 in input and output catalyst
(position shown in Fig. 3) is connected with corresponding normally-closed contact in contact simultaneously.So, B C phase be sequentially ingressed into synthesis transformator 8,9
The Same Name of Ends of primary coil；B C phase normally to load end BB CC power；A phase load circuit AA uniquely connects with synthesis third phase o
Connect；
3. lack B phase: as shown in Figure 4, the second phase shortage circuit for detecting 2 drive the catalyst P4 in input and output catalyst, P5,
The movable contact of P6 is changed simultaneously and is closed (position shown in Fig. 4) to corresponding normally opened contact；First phase shortage circuit for detecting the 1, the 3rd
Phase shortage circuit for detecting 3 drives the movable contact of catalyst P1, P2, P3, P7, P8, the P9 in input and output catalyst simultaneously with corresponding
Normally-closed contact connect (position shown in Fig. 4).So, A C phase be sequentially ingressed into primary coil of the same name of synthesis transformator 8,9
End；A C phase normally to load end AA CC power；B phase load circuit BB is uniquely coupled with synthesis third phase O；
4. lack C phase: as it is shown in figure 5, the 3rd phase shortage circuit for detecting 3 drive the catalyst P1 in input and output catalyst, P2,
The movable contact of P3 is changed simultaneously and is closed (position shown in Fig. 5) to corresponding normally opened contact；First phase shortage circuit for detecting 1, second
Phase shortage circuit for detecting 2 drives the movable contact of catalyst P4, P5, P6, P7, P8, the P9 in input and output catalyst simultaneously with corresponding
Normally-closed contact connect (position shown in Fig. 5).So, A B phase be sequentially ingressed into primary coil of the same name of synthesis transformator 8,9
End；A B phase normally to load end AA BB power；C phase load circuit CC is uniquely coupled with synthesis third phase O；
5. input and output catalyst 4,5,6 can only have state in above-mentioned 4, to prevent phase fault from occurring.
As known from the above, this device is when three-phase lack phase is protected, and the third phase arbitrarily lacked, synthesis transformator is by another
The most biphase be combined into out after, under the effect of circuit conditioning module, can power to the load.When three-phase is all normal, synthesize transformation
Device group disconnects with circuit, loads and is directly powered by input three-phase.
In this device, in order to realize any phase open-phase protection that not power-off automated tos respond to, employ 2 transformators, logical
Cross phase shortage circuit for detecting 1,2,3 and the input and output of two transformators 8,9 are configured by input and output catalyst 4,5,6.Make
By the method for 2 transformators, 2 phase power circuits are respectively connected to synthesize two primary Same Name of Ends of transformer group, non-same
Name end all connects to neutral, after the secondary Same Name of Ends of 2 transformators and non-same polarity are sequentially connected in series, and remaining termination neutrality of the same name
Line, non-same polarity is the third phase O that output is synthesized.When phase shortage circuit for detecting 1,2,3 detect three-phase all normal time, close
Becoming transformer group 8,9 to be not connected to the input of ABC three-phase, now synthesis output O is not connected to load, loads and is directly supplied by input
Electricity.When phase shortage circuit for detecting 1,2,3 detects a wherein phase phase shortage (such as A phase), the input B phase of transformator 8,9 is passed through with C phase
The vector addition of synthesis transformer group produces A phase AA of equivalence after negating.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from this utility model know-why, it is also possible to make some improvement and replacement, these change
Enter and replace and also should be regarded as protection domain of the present utility model.
Claims (8)
1. a phase-lacking protective device, is used for being connected between three-phase power supply system and three phase electric equipment, it is characterised in that bag
Including: two transformators, the non-same polarity of two transformer is connected respectively to the neutral conductor (N), two transformators time
Level coil is in series, and forms a series circuit, and one end of described series circuit is connected to the neutral conductor (N)；
In the first state, the Same Name of Ends of two transformer disconnects with three-phase power supply system, described series circuit
Another terminates zero load, and three phase lines of three-phase power supply system are connected respectively to the corresponding phase of three phase electric equipment；
When the existence mutually of three-phase power supply system lacks a phase time, and the Same Name of Ends of two transformer is another with three-phase power supply system
Outer two are connected, and the phase line of described three-phase power supply system phase shortage is connected to the other end of described series circuit, the most biphase with three
The phase line correspondence of phase electrical equipment connects.
Phase-lacking protective device the most according to claim 1, it is characterised in that described first state is in three-phase power supply system
There is not non-full-phase state.
Phase-lacking protective device the most according to claim 1, it is characterised in that two transformators are the first transformator respectively
(8), the second transformator (9), also include the first catalyst (P1), the second catalyst (P2), the 3rd catalyst (P3), the 4th contact
Device (P4), the 5th catalyst (P5), the 6th catalyst (P6), the 7th catalyst (P7), the 8th catalyst (P8), the 9th catalyst
(P9), the Same Name of Ends of described first transformator (8) primary coil connect the first catalyst (P1), the 4th catalyst (P4), the 7th
The normally opened contact of catalyst (P7), described first catalyst (P1), the 4th catalyst (P4), the movable contact of the 7th catalyst (P7)
Be connected with the first phase (A) in three-phase power supply system respectively, the first phase (A) connects, the second phase (B) connects；Described second transformation
The Same Name of Ends of device (9) primary coil connect the second catalyst (P2), the 5th catalyst (P5), the 8th catalyst (P8) normally opened touch
Point, described second catalyst (P2) the 5th catalyst (P5), the 8th catalyst (P8) movable contact respectively with three-phase power supply system
In the second phase (B) connect, third phase (C) connect, third phase (C) connect；
The non-same polarity of described first transformator (8) secondary coil connect the 3rd catalyst (P3), the 6th catalyst (P6), the
The normally opened contact of nine catalysts (P9), described 3rd catalyst (P3), the 6th catalyst (P6), the dynamic of the 9th catalyst (P9) touch
Point is connected respectively to the third phase (CC) of three phase electric equipment, the second phase (BB), the first phase (AA), described 3rd catalyst
(P3), the 6th catalyst (P6), the 9th catalyst (P9) normally-closed contact connect the third phase (C) of three-phase power supply system, second
Phase (B), the first phase (A)；The non-same polarity of described second transformator (9) secondary coil connects the first transformator (8) secondary coil
Same Name of Ends；The Same Name of Ends of described second transformator (9) secondary coil connects in three-phase power supply system and three phase electric equipment
Property line.
Phase-lacking protective device the most according to claim 3, it is characterised in that when the first phase (A) in three-phase power supply system
When there is phase shortage, the 7th catalyst, the 8th catalyst, the movable contact of the 9th catalyst change simultaneously to corresponding normally opened contact
Guan Bi.
Phase-lacking protective device the most according to claim 3, it is characterised in that when the second phase (B) in three-phase power supply system
When there is phase shortage, the 4th catalyst (P4), the 5th catalyst (P5), the movable contact of the 6th catalyst (P6) are changed to right simultaneously
The normally opened contact Guan Bi answered.
Phase-lacking protective device the most according to claim 3, it is characterised in that when the third phase (C) in three-phase power supply system
When there is phase shortage, the first catalyst (P1), the second catalyst (P2), the 3rd catalyst (P3) movable contact while conversion to
Corresponding normally opened contact Guan Bi.
7. according to the phase-lacking protective device described in claim 3-6 any one, it is characterised in that also include phase shortage circuit for detecting
(1,2,3), is used for detecting in three-phase power supply system whether phase shortage, and controls transformer Same Name of Ends and be connected to three-phase and supply
The corresponding phase of electricity system or the neutral conductor (N), and it is connected to the another of series circuit for controlling the correspondence of three phase electric equipment
Corresponding phase in one end or three-phase power supply system.
Phase-lacking protective device the most according to claim 7, it is characterised in that described phase shortage circuit for detecting (1,2,3) includes
First phase shortage circuit for detecting (1), the second phase shortage circuit for detecting (2), the 3rd phase shortage circuit for detecting (3), respectively with three phase supply system
Correspondence in system is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620106490.8U CN205753345U (en) | 2016-02-02 | 2016-02-02 | A kind of phase-lacking protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620106490.8U CN205753345U (en) | 2016-02-02 | 2016-02-02 | A kind of phase-lacking protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205753345U true CN205753345U (en) | 2016-11-30 |
Family
ID=57374882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620106490.8U Expired - Fee Related CN205753345U (en) | 2016-02-02 | 2016-02-02 | A kind of phase-lacking protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205753345U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904302A (en) * | 2021-09-08 | 2022-01-07 | 江苏核电有限公司 | Two-starting standby transformer line phase loss protection method |
-
2016
- 2016-02-02 CN CN201620106490.8U patent/CN205753345U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904302A (en) * | 2021-09-08 | 2022-01-07 | 江苏核电有限公司 | Two-starting standby transformer line phase loss protection method |
| CN113904302B (en) * | 2021-09-08 | 2023-08-08 | 江苏核电有限公司 | Circuit phase-loss protection method for two starting standby transformers |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20220202 |