CN208337144U - A kind of power protecting circuit - Google Patents
A kind of power protecting circuit Download PDFInfo
- Publication number
- CN208337144U CN208337144U CN201820769532.5U CN201820769532U CN208337144U CN 208337144 U CN208337144 U CN 208337144U CN 201820769532 U CN201820769532 U CN 201820769532U CN 208337144 U CN208337144 U CN 208337144U
- 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.)
- Expired - Fee Related
Links
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- Fire Alarms (AREA)
Abstract
The utility model 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 utility model principle is simple, and control is easy, and energy overprotection control circuit is not burned out.
Description
Technical field
The utility model relates to power protecting circuit technical field more particularly to a kind of power protecting circuits.
Background technique
Power supply generally has phase sequence relay using the power-supply device for exchanging 380V three-phase four-wire system, 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, and 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.
Utility model content
Purpose of the utility model is to solve disadvantages existing in the prior art, and a kind of power protection electricity proposed
Road.
To achieve the goals above, the utility model adopts the technical scheme that
A kind of power protecting circuit, including phase sequence relay, relay, indicator light, emergency stop switch and relay coil, institute
It states emergency stop switch to connect with phase sequence relay, phase sequence relay is connect with relay coil, the relay coil and relay
Connection, the relay are 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, the utility model has the beneficial effects that passing through emergency stop switch, phase sequence relay, relay line
Circle, relay 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
Show whether power supply is normal, indicator light is connected in parallel on the normally opened contact both ends of emergency stop switch and relay, when power supply is normal, indicator light
It is bright；When abnormity of power supply, indicator light does not work；
The utility model principle is simple, and control is easy, and energy overprotection control circuit is not burned out.
Detailed description of the invention
Fig. 1 be the utility model proposes a kind of power protecting circuit circuit diagram.
In figure: 1 emergency stop switch, 2 phase sequence relay, 3 relay coils, 4 relays, 5 indicator lights.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.
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 Yu 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 utility model principle is simple, and control is easy, can overprotection control circuit not by
It burns.
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, make subsequent conditioning circuit no power, indicator light 5 does not work, and another kind is that control circuit has
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, makes subsequent conditioning circuit no power, and indicator light 5 does not 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 utility model, indicator light 5 is connected in parallel on the normally opened contact both ends of emergency stop switch 1 Yu relay 4, and indicator light 5 is simultaneously
The normally opened contact both ends of emergency stop switch 1 Yu relay 4 are associated in, when power supply is normal, indicator light is bright；When abnormity of power supply, indicator light is not
It is bright, it is matched by emergency stop switch 1, phase sequence relay 2, relay coil 3, relay 4 and indicator light 5, passes through emergency stop switch 1
Control circuit can be cut off, equipment is made to stop, indicator light 5 is controlled for showing whether power supply is normal, and the utility model principle is simple
System is easy, and energy overprotection control circuit is not burned out, and can detecte main circuit power phase sequence and whether control circuit phase sequence is correct,
If phase sequence mistake, control circuit inputs two phase firewires, then protects circuit to disconnect subsequent conditioning circuit, protect subsequent electric components.
Working 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 operator's fault, and emergency stop
Switch can in case of emergency cut off control circuit after pressing, and equipment is made to stop.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (2)
1. a kind of power protecting circuit, including phase sequence relay (2), relay (4), indicator light (5), emergency stop switch (1) and 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) and relay
Device coil (3) connection, the relay coil (3) connect with relay (4), and the relay (4) connect with indicator light (5).
2. a kind of power protecting circuit according to claim 1, which is characterized in that the indicator light (5) is connected in parallel on emergency stop
Switch the normally opened contact both ends of (1) and relay (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820769532.5U CN208337144U (en) | 2018-05-23 | 2018-05-23 | A kind of power protecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820769532.5U CN208337144U (en) | 2018-05-23 | 2018-05-23 | A kind of power protecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208337144U true CN208337144U (en) | 2019-01-04 |
Family
ID=64775008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820769532.5U Expired - Fee Related CN208337144U (en) | 2018-05-23 | 2018-05-23 | A kind of power protecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208337144U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448536A (en) * | 2018-05-23 | 2018-08-24 | 合肥天鹅制冷科技有限公司 | A kind of power protecting circuit |
-
2018
- 2018-05-23 CN CN201820769532.5U patent/CN208337144U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448536A (en) * | 2018-05-23 | 2018-08-24 | 合肥天鹅制冷科技有限公司 | A kind of power protecting circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190104 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |