CN107658970A - A kind of relay protection circuit for fire-fighting equipment power supply - Google Patents
A kind of relay protection circuit for fire-fighting equipment power supply Download PDFInfo
- Publication number
- CN107658970A CN107658970A CN201711090388.9A CN201711090388A CN107658970A CN 107658970 A CN107658970 A CN 107658970A CN 201711090388 A CN201711090388 A CN 201711090388A CN 107658970 A CN107658970 A CN 107658970A
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- CN
- China
- Prior art keywords
- relay
- power supply
- fire
- fighting equipment
- diode
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 21
- 239000000853 adhesive Substances 0.000 claims abstract description 5
- 230000001070 adhesive effect Effects 0.000 claims abstract description 5
- 230000005611 electricity Effects 0.000 claims description 6
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000007600 charging Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Static Devices (AREA)
- Relay Circuits (AREA)
Abstract
A kind of relay protection circuit for fire-fighting equipment power supply; the circuit includes MCU and relay K1; when the voltage of fire-fighting equipment power detecting to AC network disconnects; the main power source by fire-fighting equipment power supply is needed to be switched to stand-by power supply; under MCU control, relay K1 adhesives, stand-by power supply is connected with power supply output; diode D2 is in series with the coil power supply end of the relay K1, and relay K1 coils both ends are parallel with electrochemical capacitor C1.
Description
Technical field
The invention belongs to fire-fighting equipment technical field, more particularly to a kind of relay protection electricity for fire-fighting equipment power supply
Road.
Background technology
In existing standard GB/T 28184-2011《Fire-fighting equipment power supply monitoring system》In, it is related to AC network
When voltage and standby electric switching control, there is following regulation：
4.2.1.3 monitor power supply should set main power source and stand-by power supply.When AC network supply voltage amplitude of fluctuation is in volume
In the range of determine voltage 220V 85%~110%, monitor should be able to normal work.
4.2.1.4 the power unit of monitor should have main power source and stand-by power supply translation function.When the main power source is off,
Stand-by power supply can be automatically switched to；When main power source recovers, main power source can be automatically switched to；The conversion of active and standby power supply should not influence
The normal work of monitor.
It can be seen that in fire-fighting equipment field, there is the switching requirement of main power source and stand-by power supply for the power requirement used, lead to
Normal this switching circuit will use relay.For example, circuit as shown in Figure 1.BT1 is reserve battery, when fire-fighting equipment is examined
Measure need carry out power supply switching when, pass through relay complete power supply switch.When the main power source of fire-fighting equipment power supply disconnects, from
Turn works for stand-by power supply, and when 20A or 30A electric currents are exported when power work, standby electric protective tube F1 distinguishes in switching circuit
For 20A or 30A.Protective tube non-moment fusing in excessively stream, overcurrent is of different sizes, and its corresponding fusing time is different.Insurance
The fusing time of pipe is by taking 20A protective tubes as an example：In 80A electric currents, 100-600ms fusing；In 200A electric currents, 50-80ms melts
It is disconnected.For the short circuit current of fire-fighting equipment, when 24V is for electricity output short circuit, because wire internal resistance is different, line short circuit current is
40-100A.Fig. 1 is common relay operating circuit.Hereinafter, the course of work for Fig. 1 circuits does a brief description.
Fig. 1 is common relay operating circuit, and when Q1 is turned on, relay work, relay inside normally opened contact K1 is closed
Close, circuit output 24V voltages.When output short-circuit, because protective tube has fusing time, before protective tube is unblown, relay
Actuating coil makes relay contact K1 closure dynamics gradually reduce, and then make relay because output short-circuit causes the reduction of 24V voltages
K1 contacts disconnect, and disconnect moment in relay K1 contacts, because protective tube is now unblown, relay actuating coil voltage gos up again
To 24V, make relay adhesive again, K1 contacts contact again；Because output short-circuit be it is lasting, therefore relay in protective tube not
Before fusing, it can circulate and K1 contact closures repeatedly occur with disconnecting phenomenon；Because of the very big 40- of battery pack output short circuit current
Repeatedly closure and the disconnection of 100A, K1 contact, can burn relay K1 contacts.
It can be seen that using common relay, foregoing circuit is when 24V battery packs work, when output short-circuit, easily burn after
Electrical equipment K1 contacts.Even if using the high automotive grade high-current relay of price, but still have and burn relay K1 contacts risk.
The content of the invention
The invention provides a kind of relay protection circuit for fire-fighting equipment power supply, to solve in the prior art, to make
The problem of easily being burnt with common relay when output short-circuit and high current switch.
A kind of relay protection circuit for fire-fighting equipment power supply, the circuit includes MCU and relay K1, when fire-fighting is set
Stand-by power source detected when the voltage of AC network disconnects, it is necessary to the main power source of fire-fighting equipment power supply is switched into stand-by power supply,
Under MCU control, relay K1 adhesives, stand-by power supply is connected with power supply output, at the coil power supply end of the relay K1
Diode D2 is in series with, relay K1 coils both ends are parallel with electrochemical capacitor C1.
Further, it is connected in the coil input end of the relay K1 with the negative pole of the diode D2, two pole
Pipe D2 negative pole is connected with the positive pole of the electrochemical capacitor C1, the coil of the negative pole of the electrochemical capacitor C1 and the relay K1
Output end connects.
Further, the folding that the IO control output ends of the MCU pass through relay K1 described in switching semiconductor management and control system.
Further, described switching semiconductor pipe is triode Q1, and triode Q1 base stage passes through resistance R1 connections MCU
IO control output ends, triode Q1 colelctor electrode connects the negative pole of the electrochemical capacitor C1, is also connected to the relay simultaneously
Device K1 coil output,
Diode D1 is parallel to relay K1 coil both ends, the positive pole of diode D1 negative pole and the electrochemical capacitor C1
Connection, diode D1 positive pole are connected with the negative pole of the electrochemical capacitor C1.
Further, the stand-by power supply accesses the contact input of the relay K1 by fuse F1 series connection.
Further, the stand-by power supply is 24V battery packs.
The present invention adds the pole of forward direction two for the power supply of relay K1 driving coils in existing relay operating circuit
Pipe D2, and the electrochemical capacitor C1 that coil both ends are in parallel.When 24V battery packs work, when output short-circuit, can effectively protect after
Electrical equipment K1 contacts are not burned out.So that cheap common relay can also be used in fire-fighting equipment power supply switch circuit,
Effectively reduce the cost of equipment.An anti-convention of the invention, in relay K1 coils both ends parallel electrolytic electric capacity C1, although postponing
The closing motion time of relay, do not meet the job requirement of usual relay, but in fire-fighting equipment field of power supplies, this hair
The active and standby TURP that bright circuit but meets fire-fighting equipment power supply changes requirement so that common relay can also be adapted to set in fire-fighting
Used in stand-by power source circuit.
Brief description of the drawings
Detailed description below, above-mentioned and other mesh of exemplary embodiment of the invention are read by reference to accompanying drawing
, feature and advantage will become prone to understand.In the accompanying drawings, if showing the present invention's by way of example, and not by way of limitation
Dry embodiment, wherein：
The existing fire-fighting equipment power supply control switching circuit schematic diagrams of Fig. 1.
Fig. 2 is the fire-fighting equipment power supply control switching circuit schematic diagram of the present invention.
Embodiment
As shown in Fig. 2 be the present invention the relay protection circuit for fire-fighting equipment power supply, the circuit include MCU with
Relay K1, when fire-fighting equipment detects that the voltage of AC network is disconnected, it is necessary to the main power source of fire-fighting equipment is switched to standby
During power supply, under MCU control, the relay K1 adhesives in protection circuit, stand-by power supply is connected with power supply output.
The coil both ends parallel electrolytic electric capacity C1 of relay K1 in circuit, triode Q1 base stage are connected by resistance R1
MCU IO control output ends, triode Q1 colelctor electrode connect the negative pole of the electrochemical capacitor C1, be also connected to simultaneously it is described after
On electrical equipment K1 coil output.It is connected in the coil input end of the relay K1 with the negative pole of the diode D2, it is described
Diode D2 negative pole is connected with the positive pole of the electrochemical capacitor C1, and the negative pole of the electrochemical capacitor C1 is with the relay K1's
Coil output connects, and diode D1 is parallel to the relay K1 defeated both ends of coil, diode D1 negative pole and the electrolysis electricity
Hold C1 positive pole connection, diode D1 positive pole is connected with the negative pole of the electrochemical capacitor C1.The stand-by power supply passes through insurance
Silk F1 series connection accesses the input contact of the relay K1.The stand-by power supply is 24V battery packs.Electrochemical capacitor C1 capacitances are
Maximum voltage 35V is born at 100uF~470uF, both ends, and after output short-circuit, relay contact K1 turn-off times are exemplified below,
When C1 capacitances are 220uF, K1 turn-off times are extended for 300ms；C1 capacitances are 470uF, and K1 turn-off times prolong
A length of 650ms.
The present invention increases a diode D2 for relay K1 coil power supply in existing relay operating circuit,
Electrochemical capacitor C1 with one with relay K1 coils from parallel connection of coils.When Q1 is turned on, standby electric 24V voltages are through diode D2, to electrolysis electricity
Hold C1 chargings, after electric capacity C1 to be electrolysed is full of 24V voltages, relay works, and normally opened contact K1 closures, circuit are defeated inside relay
Go out 24V voltages, it is anti-because of diode D2 before protective tube is unblown because protective tube has fusing time when output short-circuit
To feature is not turned on, makes electrochemical capacitor C1 energy storage, do not discharged because of output short-circuit, be only the power supply of relay actuating coil,
24V voltages is reduced time lengthening, before protective tube fusing, remain closed K1 contacts inside relay, with fuse
Fusing time arrives, but K1 contacts, still in closure state, when causing blown fuse, relay K1 contacts are not in that circulation is more
Secondary closure can be burned out protective relay contact effectively with disconnecting phenomenon.
What deserves to be explained is although foregoing teachings describe the essence of the invention by reference to some embodiments
God and principle, it should be appreciated that, the present invention is not limited to disclosed embodiment, the also unawareness of the division to each side
The feature that taste in these aspects can not combine, and this division is merely to the convenience of statement.It is contemplated that cover appended power
Included various modifications and equivalent arrangements in the spirit and scope that profit requires.
Claims (6)
1. a kind of relay protection circuit for fire-fighting equipment power supply, the circuit includes MCU and relay K1, works as fire-fighting equipment
, it is necessary to the main power source of fire-fighting equipment power supply is switched into stand-by power supply, in MCU when the voltage of power detecting to AC network disconnects
Control under, relay K1 adhesives, the output of stand-by power supply and power supply is connected, it is characterised in that in the line of the relay K1
Circle feeder ear is in series with diode D2, and relay K1 coils both ends are parallel with electrochemical capacitor C1.
2. it is used for the relay protection circuit of fire-fighting equipment power supply as claimed in claim 1, it is characterised in that in the relay
Device K1 coil input end is connected with the negative pole of the diode D2, and the negative pole of the diode D2 is with the electrochemical capacitor C1's
Positive pole is connected, and the negative pole of the electrochemical capacitor C1 is connected with the coil output of the relay K1.
3. it is used for the relay protection circuit of fire-fighting equipment power supply as claimed in claim 2, it is characterised in that the MCU's
The folding that IO control output ends pass through relay K1 described in switching semiconductor management and control system.
4. it is used for the relay protection circuit of fire-fighting equipment power supply as claimed in claim 3, it is characterised in that described switch
Transistor is triode Q1, and triode Q1 base stage passes through resistance R1 connections MCU IO control output ends, triode Q1 collection
Electrode connects the negative pole of the electrochemical capacitor C1, is also connected to the coil output of the relay K1 simultaneously, diode D1 is simultaneously
Relay K1 coil both ends are linked to, diode D1 negative pole is connected with the positive pole of the electrochemical capacitor C1, and diode D1 is just
Pole is connected with the negative pole of the electrochemical capacitor C1.
5. it is used for the relay protection circuit of fire-fighting equipment power supply as claimed in claim 4, it is characterised in that the standby electricity
The contact input of the relay K1 is accessed in source by fuse F1 series connection.
6. it is used for the relay protection circuit of fire-fighting equipment power supply as claimed in claim 5, it is characterised in that the standby electricity
Source is 24V battery packs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711090388.9A CN107658970B (en) | 2017-11-08 | 2017-11-08 | Relay protection circuit for fire-fighting equipment power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711090388.9A CN107658970B (en) | 2017-11-08 | 2017-11-08 | Relay protection circuit for fire-fighting equipment power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107658970A true CN107658970A (en) | 2018-02-02 |
| CN107658970B CN107658970B (en) | 2024-05-14 |
Family
ID=61120929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711090388.9A Active CN107658970B (en) | 2017-11-08 | 2017-11-08 | Relay protection circuit for fire-fighting equipment power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107658970B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110098656A (en) * | 2019-05-07 | 2019-08-06 | 六安市同心畅能电子科技有限公司 | Fire protection alarm system emergency standby power automatic charging energy-saving control circuit |
| CN113655749A (en) * | 2021-08-26 | 2021-11-16 | 杭州并坚科技有限公司 | Fire power supply main and standby power switching control circuit |
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|---|---|---|---|---|
| JPH11120883A (en) * | 1997-10-16 | 1999-04-30 | Toshiba Corp | Contact point deterioration preventive device |
| KR20020046121A (en) * | 2000-12-12 | 2002-06-20 | 정태영 | Stabilizer protector for dischange lamp |
| US20040212940A1 (en) * | 2003-04-03 | 2004-10-28 | Kugelman Michael M. | Solid state relay and method of operating the same |
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| CN204794950U (en) * | 2015-07-25 | 2015-11-18 | 浙江金控电气有限公司 | Buffering fire control drive circuit |
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| CN207382048U (en) * | 2017-11-08 | 2018-05-18 | 柏宜照明（上海）股份有限公司 | A kind of relay protection circuit for fire-fighting equipment power supply |
-
2017
- 2017-11-08 CN CN201711090388.9A patent/CN107658970B/en active Active
Patent Citations (7)
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| JPH11120883A (en) * | 1997-10-16 | 1999-04-30 | Toshiba Corp | Contact point deterioration preventive device |
| KR20020046121A (en) * | 2000-12-12 | 2002-06-20 | 정태영 | Stabilizer protector for dischange lamp |
| US20040212940A1 (en) * | 2003-04-03 | 2004-10-28 | Kugelman Michael M. | Solid state relay and method of operating the same |
| CN204270979U (en) * | 2014-09-12 | 2015-04-15 | 浙江水利水电学院 | A kind of unicoil magnetic latching relay driving circuit |
| CN204794950U (en) * | 2015-07-25 | 2015-11-18 | 浙江金控电气有限公司 | Buffering fire control drive circuit |
| CN106130172A (en) * | 2016-07-28 | 2016-11-16 | 福州米立科技有限公司 | Battery supply set emergency standby power accesses protection system |
| CN207382048U (en) * | 2017-11-08 | 2018-05-18 | 柏宜照明（上海）股份有限公司 | A kind of relay protection circuit for fire-fighting equipment power supply |
Non-Patent Citations (1)
| Title |
|---|
| 郭凤仪等: "不同保护电路对继电器电寿命的影响及实验研究", 中国电机工程学报, no. 31, pages 77 - 82 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110098656A (en) * | 2019-05-07 | 2019-08-06 | 六安市同心畅能电子科技有限公司 | Fire protection alarm system emergency standby power automatic charging energy-saving control circuit |
| CN113655749A (en) * | 2021-08-26 | 2021-11-16 | 杭州并坚科技有限公司 | Fire power supply main and standby power switching control circuit |
| CN113655749B (en) * | 2021-08-26 | 2023-03-28 | 杭州并坚科技有限公司 | Fire power supply main and standby power switching control circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107658970B (en) | 2024-05-14 |
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Effective date of registration: 20240617 Address after: No. 3719, West Section of Cuihu Sixth Road, Economic Development Zone, Tongling City, Anhui Province, 244002 Patentee after: Baiyi Electric (Tongling) Co.,Ltd. Country or region after: China Address before: 1188 Jiuye Road, Qingpu District, Shanghai, 201712 Patentee before: BAIYI LIGHTING (SHANGHAI) HOLDINGS Ltd. Country or region before: China |