CN108448536A - A kind of power protecting circuit - Google Patents
A kind of power protecting circuit Download PDFInfo
- Publication number
- CN108448536A CN108448536A CN201810498573.XA CN201810498573A CN108448536A CN 108448536 A CN108448536 A CN 108448536A CN 201810498573 A CN201810498573 A CN 201810498573A CN 108448536 A CN108448536 A CN 108448536A
- Authority
- CN
- China
- Prior art keywords
- relay
- indicator light
- phase sequence
- stop switch
- emergency stop
- Prior art date
- 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.)
- Pending
Links
- 238000000819 phase cycle Methods 0.000 claims abstract description 30
- 230000003750 conditioning effect Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
Abstract
The invention discloses a kind of power protecting circuits; including phase sequence relay, relay, indicator light, emergency stop switch and relay coil; the emergency stop switch is connected with phase sequence relay; phase sequence relay is connect with relay coil; the relay coil is connect with relay; the relay is connect with indicator light, and the indicator light is connected in parallel on the normally opened contact both ends of emergency stop switch and relay.The principle of the invention is simple, and control is easy, and energy overprotection control circuit is not burned out.
Description
Technical field
The present invention relates to power protecting circuit technical field more particularly to a kind of power protecting circuits.
Background technology
Power supply generally has phase sequence relay using the power-supply device for exchanging 380V three-phase four-wire systems, major loop at present,
It is whether correct mainly for detection of major loop phase sequence, emergency stop switch is generally concatenated in control circuit in emergency circumstances powering off.
Equally there is hidden danger in such method：When personnel's operation error, control circuit phase sequence mistake, when inputting two phase firewires, control circuit
Fire can be burnt or even cause, therefore, we have proposed a kind of power protecting circuits, for solving the above problems.
Invention content
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of power protecting circuit proposed.
To achieve the goals above, present invention employs following technical solutions：
A kind of power protecting circuit, including phase sequence relay, relay, indicator light, emergency stop switch and relay coil, the urgency
Guard's valve is connected with phase sequence relay, and phase sequence relay is connect with relay coil, and the relay coil is connect with relay,
The relay is connect with indicator light.
Preferably, the indicator light is connected in parallel on the normally opened contact both ends of emergency stop switch and relay.
Compared with prior art, beneficial effects of the present invention：By emergency stop switch, phase sequence relay, relay coil, after
Electric appliance and indicator light match, and can cut off control circuit by emergency stop switch, equipment is made to stop, and indicator light is for showing power supply
Whether normal, indicator light is connected in parallel on the normally opened contact both ends of emergency stop switch and relay, and when power supply is normal, indicator light is bright；Power supply
When abnormal, indicator light does not work；
The principle of the invention is simple, and control is easy, and energy overprotection control circuit is not burned out.
Description of the drawings
Fig. 1 is a kind of circuit diagram of power protecting circuit proposed by the present invention.
In figure：1 emergency stop switch, 2 phase sequence relay, 3 relay coils, 4 relays, 5 indicator lights.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1, a kind of power protecting circuit, including phase sequence relay 2, relay 4, indicator light 5,1 and of emergency stop switch
Relay coil 3, emergency stop switch 1 and phase sequence relay 2 connect, and phase sequence relay 2 is connect with relay coil 3, relay line
Circle 3 is connect with relay 4, and relay 4 is connect with indicator light 5, by emergency stop switch 1, phase sequence relay 2, relay coil 3,
Relay 4 and indicator light 5 match, and can cut off control circuit by emergency stop switch 1, equipment is made to stop, and indicator light 5 is for showing
Showing whether power supply is normal, indicator light 5 is connected in parallel on the normally opened contact both ends of emergency stop switch 1 and relay 4, when power supply is normal, instruction
Lamp 5 is bright；When abnormity of power supply, indicator light 5 does not work, and the principle of the invention is simple, and control is easy, and energy overprotection control circuit is not burnt
It ruins.
When phase sequence is incorrect, there are two types of situations at this time, and one is control circuit inputs one zero curve of a firewire, control electricity
Road input voltage is alternating current 220V, and major loop phase sequence mistake causes 2 normally opened contact of phase sequence relay constant；Relay coil 3 is not
It is powered, causes 4 normally opened contact of relay constant, so that subsequent conditioning circuit no power, indicator light 5 is not worked, another kind, which is control circuit, to be had
Two firewires, control circuit input voltage are exchange 380V, and major loop phase sequence mistake leads to 2 normally opened contact of phase sequence relay not
Become, 3 no power of relay coil causes 4 normally opened contact of relay constant, subsequent conditioning circuit no power, indicator light 5 is made not to work, and protects
Subsequent conditioning circuit component is protected, when phase sequence is correct, the variation of 2 normally opened contact of phase sequence relay is connects, and relay 4 has at this time
Electricity, 4 normally opened contact of relay are connected, and subsequent conditioning circuit obtains electric, and indicator light 5 is bright, in emergency circumstances, after emergency stop switch 1 is pressed, after
3 no power of electric apparatus coil, 4 normally opened contact of relay is constant, and subsequent conditioning circuit no power, indicator light 5 does not work.
In the present invention, indicator light 5 is connected in parallel on the normally opened contact both ends of emergency stop switch 1 and relay 4, and indicator light 5 is connected in parallel on
The normally opened contact both ends of emergency stop switch 1 and relay 4, when power supply is normal, indicator light is bright；When abnormity of power supply, indicator light does not work, and leads to
Emergency stop switch 1, phase sequence relay 2, relay coil 3, relay 4 and indicator light 5 is crossed to match, it can be with by emergency stop switch 1
Control circuit is cut off, equipment is made to stop, for indicator light 5 for showing whether power supply is normal, and the principle of the invention is simple, control is easy,
Energy overprotection control circuit is not burned out, and can detect main circuit power phase sequence and whether control circuit phase sequence is correct, if phase sequence
Mistake, control circuit input two phase firewires, then protect circuit to disconnect subsequent conditioning circuit, protect follow-up electric components.
Operation principle：In use, relay 4 selects coil voltage for alternating current 220V, indicator light 5 selects operating voltage to hand over
220V is flowed, when major loop and control circuit phase sequence are correct, control circuit input AC electricity 220V, indicator light 5 is bright, avoids
The case where two firewires are directly accessed control circuits, cause the control circuit component to burn by operating personnel's error, and emergency stop
Switch can in case of emergency cut off control circuit after pressing, and equipment is made to stop.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (2)
1. a kind of power protecting circuit, including phase sequence relay（2）, relay（4）, indicator light（5）, emergency stop switch（1）With after
Electric apparatus coil（3）, which is characterized in that the emergency stop switch（1）And phase sequence relay（2）Connection, phase sequence relay（2）With relay
Device coil（3）Connection, the relay coil（3）With relay（4）Connection, the relay（4）With indicator light（5）Connection.
2. a kind of power protecting circuit according to claim 1, which is characterized in that the indicator light（5）It is connected in parallel on emergency stop
Switch（1）With relay（4）Normally opened contact both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810498573.XA CN108448536A (en) | 2018-05-23 | 2018-05-23 | A kind of power protecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810498573.XA CN108448536A (en) | 2018-05-23 | 2018-05-23 | A kind of power protecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108448536A true CN108448536A (en) | 2018-08-24 |
Family
ID=63204586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810498573.XA Pending CN108448536A (en) | 2018-05-23 | 2018-05-23 | A kind of power protecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108448536A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201038732Y (en) * | 2007-05-25 | 2008-03-19 | 王彦军 | Electrical equipment protecting device |
| CN103532085A (en) * | 2013-10-30 | 2014-01-22 | 安徽英特电子有限公司 | Emergency protection circuit provided with indicator light |
| RU2510555C1 (en) * | 2012-10-05 | 2014-03-27 | Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации | Machine protective device |
| CN208337144U (en) * | 2018-05-23 | 2019-01-04 | 合肥天鹅制冷科技有限公司 | A kind of power protecting circuit |
-
2018
- 2018-05-23 CN CN201810498573.XA patent/CN108448536A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201038732Y (en) * | 2007-05-25 | 2008-03-19 | 王彦军 | Electrical equipment protecting device |
| RU2510555C1 (en) * | 2012-10-05 | 2014-03-27 | Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации | Machine protective device |
| CN103532085A (en) * | 2013-10-30 | 2014-01-22 | 安徽英特电子有限公司 | Emergency protection circuit provided with indicator light |
| CN208337144U (en) * | 2018-05-23 | 2019-01-04 | 合肥天鹅制冷科技有限公司 | A kind of power protecting circuit |
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