CN2282290Y - Over load short circuit over voltage leakage protective switch - Google Patents
Over load short circuit over voltage leakage protective switch Download PDFInfo
- Publication number
- CN2282290Y CN2282290Y CN 94214859 CN94214859U CN2282290Y CN 2282290 Y CN2282290 Y CN 2282290Y CN 94214859 CN94214859 CN 94214859 CN 94214859 U CN94214859 U CN 94214859U CN 2282290 Y CN2282290 Y CN 2282290Y
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- China
- Prior art keywords
- short circuit
- signal
- over
- leakage protective
- output
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- 230000001681 protective effect Effects 0.000 title abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 claims 1
- 230000002452 interceptive effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000001869 rapid Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses an over load, short circuit, over voltage and leakage protective switch, which takes an ordinary leakage protective switch as a basic structure, and is added with an over load and over voltage detection circuit and a short circuit protective device. When a line generates over load or over voltage, the over load, short circuit, over voltage and leakage protective switch can delay to cut off a power supply; when the line generates leakage or short circuit, the over load, short circuit, over voltage and leakage protective switch can momentarily cut off the power supply to protect device and personal safety. The characteristics of the over load, short circuit, over voltage and leakage protective switch can not be changed because of the fluctuation of voltage and the change of loads. The over load, short circuit, over voltage and leakage protective switch can be suitable for any regions and occasions. The utility model has the advantages of simple structure, stable performance and low cost. One over load short circuit over voltage leakage protective switch can replace the combination of a traditional knife switch or air switch and a leakage protective switch.
Description
The utility model relates to a kind of switch that can carry out power-off protection to overload, short circuit, overvoltage, leaky that the low-voltage power supply line takes place.
For Electrical Safety, the input that is defined in every unit users must be adorned the unit switch that knife switch or air switch and earth leakage circuit-breaker are formed.This switching function is single, and device is complicated, the cost height.Overload short circuit overvoltage earth leakage circuit-breaker at known a kind of CN2149044Y of bulletin has solved above-mentioned problem, in civilian and industrial user, promotes the use of gradually.But still there are some shortcomings: when supply power voltage raises, the phenomenon that function and protecting interferes with each other occurs.This switch built-in electric leakage, overvoltage, overload, short-circuit detecting transducer, overvoltage, overload detection signals are behind delay circuit, send into the controllable silicon trigger electrode, because leakage indicator is in parallel with above-mentioned two detectors, detection of electrical leakage internal resistance is simultaneously imitated little, therefore the overload sent of detector, a part of leakage indicator of flowing through that divides of signal of overvoltage make to flow to the silicon controlled signal weakening, thereby overload, overpressure value produce and imitate big error.Simultaneously, the d-c component of the signal of the leakage indicator of flowing through will be offset electric leakage signal, make residual operating current numerical value become big, lose the earth leakage protective effect.Not only influenced every protection index of protection switch this moment, and given to produce to debug and bring difficulty.In the time after midnight of low power consumption, when supply power voltage rose, switch was made troubles the misoperation that occurs cutting off the electricity supply to the user, also made easily and sent out wrong judgement.
The purpose of this utility model provides a kind of perfect overload, short circuit, overvoltage, earth leakage circuit-breaker; it can be in any occasion, and four kinds of defencive functions all do not disturb mutually, stopped the phenomenon that tired electricity consumption presses the switch misoperation that rises and cause fully; make stable performance, have more applicability.
The purpose of this utility model is to realize like this; one by the bakelite shell; in toggle switch is arranged; the protection switch that tripping mechanism and electric leakage, overload, overvoltage, short-circuit detecting protective device are formed; the electric signal of the various protective devices of switch is compiled and is promoted same set of tripping mechanism; and the electric terminal that has more than one signal to merge, i.e. signal Rendezvous Point.According to the size that detects the dress output signal, the signal Rendezvous Point can be in the front end or the rear end of protection system.Overload, overvoltage detection signal need through integrator delay-time circuit, and in time-delay regular hour and filtering interfering pulse, at this moment, the Rendezvous Point of they and detection of electrical leakage signal is just in the rear end of delay circuit.Signal compiles back common trigger switch element controllable silicon.The intensity of short-circuit detecting output signal is enough big, the electromagnetic force of its generation can promote tripping mechanism, just at the front end of tripping mechanism, signal compiles the same set of electromagnetic system of back input to the Rendezvous Point of it and other signal, is converted into electromagnetic force and promotes tripping mechanism work.No matter how compile the front and back in place and form; the signal Rendezvous Point that detects protection system is connected to the element that stops the signal shunting; to stop signal to flow into the opposing party's detection system; or the signal that makes shunting is little of negligible degree; at this moment; can think that the signal of two systems isolates, promptly reach non-interfering purpose.
Owing to adopt above-mentioned technical scheme; the protection switch that makes these four functions is under any use occasion; every defencive function can not produce the phenomenon that interferes with each other; the degree of depth that rises at supply power voltage particularly; this switch can not produce malfunction and cut off power supply, makes switch be applicable to any area and occasion.Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the circuit theory diagrams of an embodiment of the utility model mat woven of fine bamboo strips.
Fig. 2 is the circuit theory diagrams of second embodiment of the utility model.
In the embodiment shown in fig. 1, L
1, L
2, L
3With C
1Constitute leakage indicator, piezo-resistance R
uBe the overvoltage detecting element, tongue tube JAG and coil L
sConstitute overload detection.Overload and overvoltage detector be because of connecing same accessory power supply, the identical and output in parallel of current potential, and signal can not interfere with each other.When circuit abnormality, the overload of output or overvoltage signal are by R
1, D
1, D
2, C
2, behind the delay circuit formed, by D
2Output comes together in the trigger electrode of controllable silicon ST with the signal of leakage indicator output, and this moment, the choked flow element of Rendezvous Point was diode D by two anodal butt joints
3, D
2Form,, the trigger electrode of the anodal termination controllable silicon ST of two opposed diodes, in addition individual two negative poles, one meets leakage indicator output L
3, C
1, another take over carry, the output of overvoltage detector, i.e. delay capacitor C
2Anode, more than be that controllable silicon adopts positive pulse to trigger, trigger then diode D as adopting negative pulse
3, D
2Polarity opposite.Because D
3, D
2Unidirectional conducting, therefore, transship, the overvoltage signal still is that electric leakage signal can not seal in the other side's circuit, then can reach non-interfering purpose.Diode D
2, D
3Also can replace with two resistance respectively, effect is identical.Signal flows into the other side through resistance and then produces decay, as long as attenuation is enough big, the other side's detector system is not had influence, then can think not constitute interference.The value of isolation resistance can be best about 10K.Short-circuit protection is by coil L
sConstitute with tripping system, the stiction of dropout mechanical system suction disc is reference quantity, and the electromagnetic attraction that produces when short circuit current is during greater than the stiction of mechanical system, and the tripping mechanism actuating circuit is protected, and be short circuit current protection this moment.It should not be excessive, is the best with 3～4 times of rated current.Because the signal of telecommunication that short-circuit protection produced enough promotes tripping mechanism, so the Rendezvous Point of it and other three road signal is the electromagnetic system at tripping mechanism, at this moment, the choked flow element of Rendezvous Point separation signals is the loading coil L that the two-way output signal is arranged by interior
s, the dropout built-up coil that exists with the relay form of J, a shared cover iron stamen and an electromagnetic system, in two groups of absolute coils are arranged, one group is the short circuit protection system load, short-circuited coil L
s, one group is electric leakage and other protection system load, coil J, and their each bodies act on tripping mechanism in the form of electromagnetic force, do not disturb mutually.
In the embodiment shown in the figure two, overload, overvoltage, short circuit, detection of electrical leakage system are also arranged, detection system has various ways, and the effect of using at the utility model is all identical, and this example is got the form identical with last example.Same section no longer repeats.Overload, overvoltage, signal behind delay circuit by C
2Positive terminal output, the detection of electrical leakage signal is by L
3With C
1Public rapids output.Their Rendezvous Points also are the inputs of switch element, and stoping vent diverter this moment is two controllable silicon ST of while double as switch element
1, ST
2, two silicon controlled source electrodes also connect, and are connected to accessory power supply, and two drain electrodes also connect, and are connected to loading coil J, two trigger electrodes, an output L who connects leakage indicator
3, C
1Male end, another is taken over and carries, the overvoltage detection signal is failed C
2Positive pole.Because silicon controlled buffer action, though a shared common load coil J, detection signal can not interfere with each other yet, and distributary phenomenon can not take place, detection signal all flows into the trigger electrode of switch element ST separately respectively separately, has so also reached the non-interfering purpose of each detection signal.
According to equal transfer principle, above-mentioned two controllable silicons also available semiconductor integrated circuit with two inputs replace, two inputs connect the output of leakage indicator output and overload, overvoltage detector respectively, effect is identical with controllable silicon.
The device of short-circuit protection is identical with last embodiment with Signal Spacing.
Claims (6)
1, a kind of overload, overvoltage, short circuit, earth leakage circuit-breaker; in have various electric parameters to detect protection systems; it is characterized in that: each electric signal that detects protection is compiled and is promoted same set of tripping mechanism; and there are more than one signal Rendezvous Point, the signal Rendezvous Point of detector guard device system to be connected to the element that stops the signal shunting.
2, protection switch according to claim 1 is characterized in that: stoping vent diverter can be by two anodal diode D that dock
3, D
2Form, the trigger electrode of the anodal termination controllable silicon ST of butt joint, other two negative poles, one meets leakage indicator output L
3, C
1, another take over carry, the output C of overvoltage detector
2Positive pole.
3, protection switch according to claim 1 and 2 is characterized in that: choked flow component of diode D
2, D
3Also can replace with two resistance respectively, effect is identical.
4, protection switch according to claim 1 is characterized in that: stoping the element of shunting can be two controllable silicon ST
1, ST
2, two silicon controlled source electrodes also connect, and are connected to accessory power supply, and two drain electrodes also connect, and are connected to loading coil J, two trigger electrodes, the output L of a contact leakage indicator
3, C
1Common port, another take over carry, overvoltage detection signal output C
2Positive pole.
5, protection switch according to claim 1 is characterized in that: stop vent diverter can have the semiconductor integrated circuit of two inputs, two inputs meet leakage indicator L respectively
3, C
1Common port and overload, overvoltage detector output C
2Positive pole.
6, protection switch according to claim 1 is characterized in that: the element that stops the signal shunting can be the loading coil L by the two-way output signal
s, the dropout built-up coil that exists with the relay form of J, a shared cover iron core and an electromagnetic system, in two groups of coils are arranged, one group is the short circuit protection system load, short-circuited coil L
s, one group is electric leakage and other protection system loading coil J.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94214859 CN2282290Y (en) | 1994-06-12 | 1994-06-12 | Over load short circuit over voltage leakage protective switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94214859 CN2282290Y (en) | 1994-06-12 | 1994-06-12 | Over load short circuit over voltage leakage protective switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2282290Y true CN2282290Y (en) | 1998-05-20 |
Family
ID=33831008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94214859 Expired - Fee Related CN2282290Y (en) | 1994-06-12 | 1994-06-12 | Over load short circuit over voltage leakage protective switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2282290Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10263416B2 (en) | 2012-12-03 | 2019-04-16 | Huawei Technologies Co., Ltd. | Overvoltage protection apparatus and method |
-
1994
- 1994-06-12 CN CN 94214859 patent/CN2282290Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10263416B2 (en) | 2012-12-03 | 2019-04-16 | Huawei Technologies Co., Ltd. | Overvoltage protection apparatus and method |
| US11404867B2 (en) | 2012-12-03 | 2022-08-02 | Huawei Techologies Co., Ltd. | Overvoltage protection apparatus and method |
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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 |