CN2133964Y - Multifunctional protector for power supply and utilization - Google Patents
Multifunctional protector for power supply and utilization Download PDFInfo
- Publication number
- CN2133964Y CN2133964Y CN 92222166 CN92222166U CN2133964Y CN 2133964 Y CN2133964 Y CN 2133964Y CN 92222166 CN92222166 CN 92222166 CN 92222166 U CN92222166 U CN 92222166U CN 2133964 Y CN2133964 Y CN 2133964Y
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- CN
- China
- Prior art keywords
- phase
- voltage
- protector
- limit
- transformer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000001012 protector Effects 0.000 title claims abstract description 29
- 238000005070 sampling Methods 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- XSBJUSIOTXTIPN-UHFFFAOYSA-N aluminum platinum Chemical compound [Al].[Pt] XSBJUSIOTXTIPN-UHFFFAOYSA-N 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 230000007257 malfunction Effects 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 2
- GIGQFSYNIXPBCE-UHFFFAOYSA-N alumane;platinum Chemical compound [AlH3].[Pt] GIGQFSYNIXPBCE-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The utility model is a multifunctional protector for power supply and utilization.
The utility model aims to use simplest structure, lower cost, manufacturing and easy maintenance as the prerequisite, obtain sensitive, reliable, the strong multi-functional protection device of interference killing feature.
The utility model is characterized in that: a three-phase transformer is used as a sampling element and an action power supply.
The utility model discloses an usage is: the protector can be used as a protector for faults of overvoltage, undervoltage, phase failure, short circuit, three-phase voltage unbalance and the like of high and low voltage power supply lines and electric equipment, and can also be used as a protector for overvoltage, undervoltage and short circuit faults of household electrical equipment.
Description
The utility model is confession, electricity consumption multi-function protector, belongs to the protective device of power supply and power consumption equipment multifunctional and multipurpose.
At present; mostly using defencive function is single or purposes is single protector or watch-dog in the prior art; for example Chinese utility model patent bulletin 89207944.4 discloses family's global function protector; notification number CN2062513U discloses threephase motor phase shortage monitor etc., all belongs to the technology that purposes is single or defencive function is single.And notification number CN2062126U discloses the overload comprehensive protector that adopts monolithic computer, is used for industry spot, the antijamming capability significant, and the use maintenance need be than high-tech.
The present utility model purpose is: with simple as far as possible structure, lower cost, to make more convenient again with maintenance be prerequisite, obtain sensitive, reliably, multi-functional, the multipurpose protective device of confession, electricity consumption that antijamming capability is strong.
The utility model electrical schematic diagram as shown in Figure 1.Circuit is made up of sample (1), action power (2), double-limit comparator (3) or door (4), time-delay (5), driving amplification (6), execution (7).
One of feature of the present utility model is: the three-phase group formula transformer that adopts elementary star connection band center line is as sampling element, and the transformer among Fig. 1 has two effects, and the first is as sampling element, its two action power of double as protector again.Two of feature of the present utility model is: in order to guarantee disconnected phase of three-phase power line even disconnected going under the malfunction of two-phase, it is constant substantially still to keep protector action power voltage, three-phase group formula transformer is paid the limit and is adopted two-phase windings in series connection, by voltage phasor-diagram as can be known, the winding of the star connection of former sideband center line, no matter be an outage or a two-phase outage mutually, the limit winding of paying of two series connection is exported the phase voltage value that is maintained a phase; Feature of the present utility model also is: double-limit comparator (3) (claiming the fenestra comparator again) combines with the sampling element of three-phase group formula transformer and obtains the characteristics of multifunction protection.The utility model also can expand to its defencive function high pressure and supply, uses electric line as being equipped with three-phase magnetic circuit voltage transformer independent of each other again.
Fig. 1 is an electrical schematic diagram of the present utility model.
Fig. 2 is confession, electricity consumption multi-function protector action power voltage phasor-diagram.
Fig. 3, Fig. 4, Fig. 5 use the wiring exemplary plot for, electricity consumption multi-function protector.
Referring now to Fig. 1, Fig. 2, Fig. 3 the present invention is elaborated. In Fig. 1, because transformer is three-phase group formula star connection band center line, three-phase magnetic circuit is independent of one another, thus when overvoltage, under-voltage, disconnected phase, short circuit or imbalance of three-phase voltage appear in former limit supply line voltage, three samplings pay the malfunction that the limit winding can correctly reflect former limit. The A phase shortage that breaks mutually for example, A phase magnetic circuit loss of excitation is paid not induced potential of limit winding, does not have sampled voltage so pay a limit a phase winding. Double-limit comparator (3) adopts single power supply, and has two greater than zero setting level, when certain phase sampler voltage circle is set between the level comparator output low level in two of this phase double-limit comparators; When overvoltage (making sampled voltage be higher than boundary level), under-voltage (making sampled voltage be lower than lower level) appear in certain phase supply line, (sampled voltage is zero to disconnected phase, be lower than lower level), (sampled voltage is zero in short circuit, be lower than lower level), (certain phase sampler voltage is higher for imbalance of three-phase voltage, be higher than boundary level, certain phase sampler low voltage, be lower than lower level) etc. during malfunction, certain phase comparator is output as high level. Three comparator output levels in the three-phase circuit are aggregated into three input OR circuits (4), as long as three input OR circuits have an end to be input as high level, its output is high level, this high level is added to the input of driving amplifier (6) through delay circuit (5), it is electric that executing agency (7) relay is got, and relay normally closed contact J opens. By the use wiring diagram of Fig. 3 as can be known; J opens when relay normally closed contact; the contactor of control supply line or the magnet exciting coil dead electricity of breaker; its main contact separately cuts off power supply, thereby reaches in power supply or protected the purpose of supply line's (for example load short circuits fault) or consumer safety under with the line fault state.
As seen from Figure 1, the action power of multi-function protector is two pair limit windings of mutually connecting taking from equally three-phase group formula transformer. By the voltage phasor-diagram of Fig. 2 as can be known, two voltage phasors of paying the limit windings of series connection forwardThe two-phase that equals to participate in connecting is paid limit winding voltage phasor
With
Phasor and, namely
＝
a＋
b, and its voltage effective value meets equation U=Ua＝U
b＝U
cHence one can see that; former limit when the three-phase group formula transformer of former limit star connection band center line; such as A; B; the C three-phase is disconnected phase respectively; all do not affect the value of U; work as even A; C two-phase or B; the C two-phase is disconnected phase simultaneously; do not affect yet U value (actual two-phase simultaneously disconnected phase probability seldom); work as three-phase power line; under-voltage; during imbalance of three-phase voltage; although the value of voltage U is respective change also; but because alternating voltage U also has the three terminal regulator voltage stabilizing after rectification, so or can guarantee three terminal regulator output; dc voltage stability as the protector action power is constant. Adopt this special power supply formula, guaranteed that the action power dc voltage stability is constant on the one hand, guaranteed also that on the other hand the three terminal regulator internal pressure drops is no more than its range of safety operation.
Folder one deck aluminium platinum screen layer has improved antijamming capability between former pair of limit winding of transformer.
The utility model has the advantages that: simple in structure, cost is low, only needs conventional electrician, electronic material and device, makes with easy to maintenance; defencive function is many, and is of many uses, and sensitivity is many; antijamming capability is strong, and ratio of performance to price height, defencive function are not subjected to the restriction of circuit or place capacity size.
Embodiment 1: multi-function protector uses by use winding diagram shown in Figure 3 as pressing the circuit of the listed component parameters composition diagram 1 of subordinate list 1 again, can play following defencive function to power consumption equipments such as the motor of 380V/220V power supply, transformer, capacitors:
＜1〉overvoltage, under-voltage protection (is example with the 380V/220V circuit) *
Line voltage: overvoltage 450V ± 5% time-delay action in 4.8 seconds,
Under-voltage 310V ± 5% time-delay action in 4.8 seconds,
Phase voltage: overvoltage 260V ± 5% time-delay action in 4.8 seconds,
Under-voltage 180V ± 5% time-delay action in 4.8 seconds.
* operation voltage upper and lower limit and deferred action time limit can be adjusted.
＜2〉open phase protection
Three-phase is appointed a disconnected phase, by the time-delay time limit action of adjusting.
＜3〉neutral point excursion protection (imbalance of three-phase voltage)
Neutral point potential shift 〉=50 volt, protector is by the time-delay time limit action of adjusting.
＜4〉phase fault or phase ground short circuit protection
Any line to line fault or arbitrary relative ground circuit among three-phase, the protector instantaneous operation had both been protected power consumption equipment, had protected the safety of power supply and supply line again.
Embodiment 2: multi-function protector is as pressing the circuit of subordinate list 1 listed component parameters composition diagram 1, uses by use winding diagram shown in Figure 5 again, can play the defencive function of overvoltage, under-voltage, phase ground short circuit to 220 volts household electrical appliance of powering, lighting apparatus etc.
Embodiment 3: multi-function protector is as pressing the circuit of subordinate list 2 listed component parameters composition diagrams 1; use by use winding diagram shown in Figure 4 again, can play defencive functions such as overvoltage, under-voltage, the phase failure, imbalance of three-phase voltage, phase fault or phase ground short circuit 6000 volts high-tension motors of powering.
Ratio of performance to price height of the present utility model, about 80 yuan of the confession among the embodiment 1,2, electricity consumption multi-function protector cost prices.
Claims (4)
1, a kind of confession, electricity consumption multi-function protector, formed with power supply (2), double-limit comparator (3) or door (4), time-delay (5), driving amplification (6), execution (7) by sampling (1), moving, it is characterized in that: adopt the three-phase group formula transformer of elementary star connection band center line, pay the sampling element of limit three phase windings for one group as three-phase circuit; Another group is paid the action power of limit two-phase windings in series as protector; Adopt the eyes comparator to cooperate with sampling.
2, confession according to claim 1, electricity consumption multi-function protector; it is characterized in that adopting the three-phase group formula transformer of elementary star connection band center line as sampling element; add the shielding of layer of aluminum platinum between the former pair of limit winding; improve antijamming capability; because three-phase magnetic circuit is independent; when transformer original edge voltage unusual (overvoltage, under-voltage, the phase failure, short circuit, imbalance of three-phase voltage), pay a sampling edge winding and can correctly reflect former limit failure condition.
3, confession according to claim 1, electricity consumption multi-function protector; it is characterized in that: other one group of action power of paying after the two-phase windings in series of limit as protector of same set of three-phase group formula transformer; when the transformer original edge voltage unusual; after pair limit winding voltage of two series connection is supplied with rectification, filtering, three terminal regulator voltage stabilizing; can obtain to stablize constant direct current operation voltage, the pressurizer internal pressure drops is no more than its range of safety operation.
4, confession according to claim 1, electricity consumption multi-function protector, its feature also is: cooperate independently voltage transformer of a cover three-phase magnetic circuit again, this protector can be expanded to the protective device of high voltage supply circuit or high pressure power consumption equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92222166 CN2133964Y (en) | 1992-05-21 | 1992-05-21 | Multifunctional protector for power supply and utilization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92222166 CN2133964Y (en) | 1992-05-21 | 1992-05-21 | Multifunctional protector for power supply and utilization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2133964Y true CN2133964Y (en) | 1993-05-19 |
Family
ID=33768731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92222166 Expired - Fee Related CN2133964Y (en) | 1992-05-21 | 1992-05-21 | Multifunctional protector for power supply and utilization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2133964Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374425A (en) * | 2016-10-12 | 2017-02-01 | 长沙群瑞电子科技有限公司 | Undervoltage protection circuit of three-phase power supply |
-
1992
- 1992-05-21 CN CN 92222166 patent/CN2133964Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374425A (en) * | 2016-10-12 | 2017-02-01 | 长沙群瑞电子科技有限公司 | Undervoltage protection circuit of three-phase power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |