CN105958633A - Two-way power supply automatic switching power supply circuit - Google Patents

Two-way power supply automatic switching power supply circuit Download PDF

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Publication number
CN105958633A
CN105958633A CN201610459935.5A CN201610459935A CN105958633A CN 105958633 A CN105958633 A CN 105958633A CN 201610459935 A CN201610459935 A CN 201610459935A CN 105958633 A CN105958633 A CN 105958633A
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CN
China
Prior art keywords
power supply
contactor
coil
alternating current
control unit
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Pending
Application number
CN201610459935.5A
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Chinese (zh)
Inventor
叶彬城
陈文全
孟超
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Avic Tech (xiamen) Electric Power Technology Ltd By Share Ltd
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Avic Tech (xiamen) Electric Power Technology Ltd By Share Ltd
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Priority to CN201610459935.5A priority Critical patent/CN105958633A/en
Publication of CN105958633A publication Critical patent/CN105958633A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04Circuit 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
    • H02J9/06Circuit 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

Abstract

The invention provides a two-way power supply automatic switching power supply circuit, and aims at solving the problems that the original two-way power supply automatic switching power supply circuit is complicated in structure, large in size and low in reliability. The two-way power supply automatic switching power supply circuit comprises an AC power supply A, an AC power supply B, a selection control unit and an interlock control unit, wherein the selection control unit and the interlock control unit are mutually connected; the interlock control unit comprises an AC contactor KM1 and an AC contactor KM2 which are in interlock connection; a normally open contact KM1C of the AC contactor KM1 is connected between a live wire of the AC power supply A and a load in series; a normally open contact KM2C of the AC contactor KM2 is connected between the live wire of the AC power supply B and the load in series; and the selection control unit is used for controlling selection of suction of the normally open contact KM1C of the AC contactor KM1 or the normally open contact KM2C of the AC contactor KM2 and avoiding a short circuit caused by competition of two ways of power supplies when the AC power supply A and the AC power supply B are simultaneously powered on.

Description

Double loop power supply automatic switching power supply circuits
Technical field
The present invention relates to power supply control switching circuit field, particularly to double loop power supply automatic switching power supply circuits.
Background technology
In occasion of much powering, such as compact type substation, power plant, chemical plant etc., load needs continuous print to supply Electricity, uses two-way power supply to backup each other to improve the reliability powered in these occasions, when main road has a power failure mostly Time, mostly need to switch to stand-by power supply manually, cause centre can load unpowered for some time, Unmanned cannot be realized.
Although double loop power supply automatic switching power supply circuits need asking of manual switching stand-by power supply when solving power failure Topic, but, the complex structural designs of existing double loop power supply automatic switching power supply circuits, not only system bulk Greatly, too much components and parts more reduce the reliability of system, also make the response speed relative reduction of system.
Summary of the invention
The invention provides double loop power supply automatic switching power supply circuits, solve original double loop power supply automatic switching The problem that power supply circuit construction is complicated, volume is big and reliability is the highest.
For achieving the above object, technical solution of the present invention is:
Double loop power supply automatic switching power supply circuits, including alternating current power supply A and alternating current power supply B, including being connected with each other Selection control unit and interlocking control unit;
Described interlocking control unit includes the A.C. contactor KM1 and A.C. contactor KM2 of interlocking connection;Wherein The normally opened contact KM1C series connection of described A.C. contactor KM1 accesses live wire and the load of described alternating current power supply A Between, the normally opened contact KM2C series connection of described A.C. contactor KM2 accesses the live wire of described alternating current power supply B and bears Between load;
Described selection control unit is in order to control to select normally opened contact KM1C or the institute of described A.C. contactor KM1 State the adhesive of the normally opened contact KM2C of A.C. contactor KM2, and avoid described alternating current power supply A and described friendship When stream power supply B sends a telegram here simultaneously, two-way power supply competes the short circuit caused.
Further, described interlocking connection mode is: the normally-closed contact KM1A mono-of described A.C. contactor KM1 Terminating into zero line N, the other end is connected with one end of the coil KM2B of described A.C. contactor KM2;Described line The other end of circle KM2B is connected with described selection control unit;The normally-closed contact of described A.C. contactor KM2 Zero line N is accessed in KM2A one end, and the other end is connected with one end of the coil KM1B of described A.C. contactor KM1, The other end of described coil KM1B connects with the live wire of described alternating current power supply A.
Further, described selection control unit includes A.C. contactor KM3.
Further, described selection control unit includes at least one AC relay RLY.
Further, another of the normally opened contact KM3C of described A.C. contactor KM3 and described coil KM2B End connects, and coil KM3B one end is connected with described zero line N, and the other end connects with the live wire of described alternating current power supply B Connect.
Further, the normally opened contact of described AC relay RLY1 connects with the other end of described coil KM2B Connecing, described zero line N is accessed in coil one end of described AC relay RLY1, and the other end accesses described alternating current The live wire of source B.
Further, described selection control unit includes AC relay RLY2 and AC relay RLY3, institute The coil one end stating RLY2 is connected with described zero line N, and the other end accesses the live wire of described alternating current power supply B;Institute One end of the normally opened contact and the coil of described AC relay RLY3 of stating RLY2 is connected, described exchange relay The other end of the coil of device RLY3 accesses described zero line N;The normally opened contact of described AC relay RLY3 and institute The other end stating coil KM2B connects.
From the above-mentioned description of this invention, compared to the prior art, present invention have the advantage that
One, in the present invention, A.C. contactor KM1 and A.C. contactor KM2 attaches a normally-closed contact, Its each coil control loop be all serially connected in one group of normally-closed contact loop of the other side, define electrical interlocks, The selection of double loop power supply is controlled, at a certain road alternating current by AC relay or A.C. contactor KM3 The purpose of automatic switching is achieved, the competition it can be avoided that two-way alternating current power supply is sent a telegram here simultaneously again simultaneously during the power-off of source The short circuit caused, truly achieves unattended purpose.
Two, the most only having used two kinds of components and parts in the present invention, the quantity of components and parts used is few, and kind is few, makes Obtaining overall volume of the present invention smaller and more exquisite, circuit is simpler, and the reliability of system is higher.
Three., the present invention selects control unit can be in series by multiple AC relays, in order to extend selection The movement time of control unit, interlock control unit reaction action for two-way alternating current power supply when sending a telegram here provides simultaneously The longer time so that it is anti-battle short function is relatively reliable, further increase the safety of circuit.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, The schematic description and description of the present invention is used for explaining the present invention, is not intended that the improper limit to the present invention Fixed.In the accompanying drawings:
Fig. 1 is present system structured flowchart;
Fig. 2 is the circuit diagram of the embodiment of the present invention one;
Fig. 3 is the circuit diagram of the embodiment of the present invention two;
Fig. 4 is the circuit diagram of the embodiment of the present invention three.
Detailed description of the invention
In order to make the technical problem to be solved, technical scheme and beneficial effect clearer, clear, Below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that this place is retouched The specific embodiment stated only in order to explain the present invention, is not intended to limit the present invention.
Referring to figs. 1 through Fig. 4, double loop power supply automatic switching power supply circuits, including alternating current power supply A and alternating current power supply B, including interconnective selection control unit 2 and interlocking control unit 1;
Described interlocking control unit 1 includes the A.C. contactor KM1 and A.C. contactor KM2 of interlocking connection;Its Described in the normally opened contact KM1C series connection of A.C. contactor KM1 access the live wire of described alternating current power supply A and load Between, the normally opened contact KM2C of described A.C. contactor KM2 series connection access described alternating current power supply B live wire and Between load;
Described selection control unit 2 in order to control to select the normally opened contact KM1C of described A.C. contactor KM1 or The adhesive of the normally opened contact KM2C of described A.C. contactor KM2, and avoid described alternating current power supply A and described When alternating current power supply B is sent a telegram here simultaneously, two-way power supply competes the short circuit caused.
Embodiment one:
With reference to Fig. 2, in the present invention, the normally opened contact KM1C series connection of described A.C. contactor KM1 accesses described Between live wire and the load of alternating current power supply A, the normally opened contact KM2C series connection of described A.C. contactor KM2 accesses Between live wire and the load of described alternating current power supply B;Normally-closed contact KM1A one end of described A.C. contactor KM1 Accessing zero line N, the other end is connected with one end of the coil KM2B of described A.C. contactor KM2;Described coil The other end of KM2B is connected with described A.C. contactor KM3;The normally-closed contact KM2A of described A.C. contactor KM2 Zero line N is accessed in one end, and the other end is connected with one end of the coil KM1B of described A.C. contactor KM1, described The other end of coil KM1B connects with the live wire of described alternating current power supply A.The most described A.C. contactor KM1 and Described A.C. contactor KM2 forms electrical interlocks.
The normally opened contact KM3C of described A.C. contactor KM3 is connected with the other end of described coil KM2B, line Circle KM3B one end is connected with described zero line N, and the other end is connected with the live wire of described alternating current power supply B.
Operation principle:
State one:
When alternating current power supply A is charged, and at this moment alternating current power supply B is not charged, the coil KM3B of A.C. contactor KM3 No power, therefore the normally opened contact KM3C of A.C. contactor KM3 is off, and causes A.C. contactor The coil KM2B no power of KM2, so the normally opened contact KM2C of A.C. contactor KM2 is also at off-state, The normally-closed contact KM2A of A.C. contactor KM2 is in closure state, now the coil KM1B of A.C. contactor KM1 It is energized due to the Guan Bi of KM2A, when the coil KM1B of A.C. contactor KM1 has electric current to flow through, exchange The normally-closed contact KM1A of catalyst KM1 disconnects, the normally opened contact KM1C Guan Bi of A.C. contactor KM1, negative It is loaded under the power supply of alternating current power supply A and works;
Now if alternating current power supply B is sent a telegram here again, the normally opened contact KM3C Guan Bi of A.C. contactor KM3, But now the normally-closed contact KM1A of A.C. contactor KM1 is still in off-state, now A.C. contactor KM2 Coil KM2B be not energized, so the normally opened contact KM2C of A.C. contactor KM2 is still in off-state, Ensure that by alternating current power supply A stable power-supplying;
If at this moment alternating current power supply A power-off, the coil KM1B dead electricity of A.C. contactor KM1, A.C. contactor The normally opened contact KM1C of KM1 disconnects, the normally-closed contact KM1A Guan Bi of A.C. contactor KM1, and now exchange connects The coil KM2B of tentaculum KM2 obtains electric, and the normally-closed contact KM2A of A.C. contactor KM2 disconnects, ac contactor The normally opened contact KM2C Guan Bi of device KM2, is now powered by alternating current power supply B.
State 2:
When alternating current power supply B is charged, and at this moment alternating current power supply A is not charged, the normally closed of A.C. contactor KM1 is touched Point KM1A is in closure state, the normally opened contact KM3C Guan Bi of A.C. contactor KM3, now ac contactor The coil KM2B of device KM2 obtains electric, the normally opened contact KM2C Guan Bi of A.C. contactor KM2, A.C. contactor The normally-closed contact KM2A of KM2 disconnects, and the normally opened contact KM1C of A.C. contactor KM1 is off, negative It is loaded under the power supply of alternating current power supply B and works;
Now if alternating current power supply A is sent a telegram here again, due to the normally-closed contact KM2A of A.C. contactor KM2 Off-state, so the coil KM1B of A.C. contactor KM1 is in open circuit, now A.C. contactor KM1 Normally opened contact KM1C still in off-state, it is ensured that by alternating current power supply B stable power-supplying.
If at this moment alternating current power supply B power-off, the normally opened contact KM3C of A.C. contactor KM3 disconnects, now hands over The coil KM2B dead electricity of stream catalyst KM2, the normally opened contact KM2C of A.C. contactor KM2 disconnects, exchange The normally-closed contact KM2A Guan Bi of catalyst KM2, the coil KM1B of A.C. contactor KM1 is in electric, hands over The normally-closed contact KM1A of stream catalyst KM1 disconnects, the normally opened contact KM1C Guan Bi of A.C. contactor KM1, Now powered by alternating current power supply A.
State 3:
When alternating current power supply A and alternating current power supply B are sent a telegram here, owing to the coil KM3B of A.C. contactor KM3 encourages simultaneously Magnetic needs a period of time, is also required to a period of time, therefore at A.C. contactor KM3 during normally opened contact KM3C Guan Bi Action during this period of time in, the A.C. contactor KM1 elder generation action in alternating current power supply A, now A.C. contactor The coil KM1B of KM1 is in electric, and the normally-closed contact KM1A of A.C. contactor KM1 disconnects, A.C. contactor The normally opened contact KM1C Guan Bi of KM1, is taken the lead in powering, due to electrical interlocks, alternating current power supply by alternating current circuit A A.C. contactor KM2 in B is failure to actuate, it is to avoid A.C. contactor KM1 and A.C. contactor KM2 competition is dynamic Cause alternating current power supply A and alternating current power supply B instantaneous short circuit.
Embodiment two:
With reference to Fig. 3, embodiment two is essentially identical with embodiment one, and its difference is: described exchange continues The normally opened contact of electrical equipment RLY1 is connected with the other end of described coil KM2B, described AC relay RLY1's Described zero line N is accessed in coil one end, and the other end accesses the live wire of described alternating current power supply B.
Operation principle:
State one:
When alternating current power supply A is charged, and at this moment alternating current power supply B is not charged, the coil of AC relay RLY1 is not Energising, therefore the normally opened contact of AC relay RLY1 is off, and causes A.C. contactor KM2's Coil KM2B no power, so the normally opened contact KM2C of A.C. contactor KM2 is also at off-state, hands over The normally-closed contact KM2A of stream catalyst KM2 is in closure state, the now coil KM1B of A.C. contactor KM1 It is energized due to the Guan Bi of KM2A, when the coil KM1B of A.C. contactor KM1 has electric current to flow through, exchange The normally-closed contact KM1A of catalyst KM1 disconnects, the normally opened contact KM1C Guan Bi of A.C. contactor KM1, negative It is loaded under the power supply of alternating current power supply A and works;
Now if alternating current power supply B is sent a telegram here again, the normally opened contact Guan Bi of AC relay RLY1, but Be the normally-closed contact KM1A of now A.C. contactor KM1 still in off-state, now A.C. contactor KM2 Coil KM2B be not energized, so the normally opened contact KM2C of A.C. contactor KM2 is still in off-state, Ensure that by alternating current power supply A stable power-supplying;
If at this moment alternating current power supply A power-off, the coil KM1B dead electricity of A.C. contactor KM1, A.C. contactor The normally opened contact KM1C of KM1 disconnects, the normally-closed contact KM1A Guan Bi of A.C. contactor KM1, and now exchange connects The coil KM2B of tentaculum KM2 obtains electric, and the normally-closed contact KM2A of A.C. contactor KM2 disconnects, ac contactor The normally opened contact KM2C Guan Bi of device KM2, is now powered by alternating current power supply B.
State 2:
When alternating current power supply B is charged, and at this moment alternating current power supply A is not charged, the normally closed of A.C. contactor KM1 is touched Point KM1A is in closure state, the normally opened contact Guan Bi of AC relay RLY1, now A.C. contactor KM2 Coil KM2B obtain electric, the normally opened contact KM2C of A.C. contactor KM2 Guan Bi, A.C. contactor KM2's Normally-closed contact KM2A disconnects, and the normally opened contact KM1C of A.C. contactor KM1 is off, and is supported on Work under the power supply of alternating current power supply B;
Now if alternating current power supply A is sent a telegram here again, due to the normally-closed contact KM2A of A.C. contactor KM2 Off-state, so the coil KM1B of A.C. contactor KM1 is in open circuit, now A.C. contactor KM1 Normally opened contact KM1C still in off-state, it is ensured that by alternating current power supply B stable power-supplying.
If at this moment alternating current power supply B power-off, the normally opened contact of AC relay RLY1 disconnects, and now exchange connects The coil KM2B dead electricity of tentaculum KM2, the normally opened contact KM2C of A.C. contactor KM2 disconnects, ac contactor The normally-closed contact KM2A Guan Bi of device KM2, the coil KM1B of A.C. contactor KM1 is in electric, and exchange connects The normally-closed contact KM1A of tentaculum KM1 disconnects, the normally opened contact KM1C Guan Bi of A.C. contactor KM1, now Powered by alternating current power supply A.
State 3:
When alternating current power supply A and alternating current power supply B are sent a telegram here, owing to the coil magnetization of AC relay RLY1 needs simultaneously Wanting a period of time, the normally opened contact of AC relay RLY1D is also required to a period of time when closing, and is therefore handing over Current relay RLY1 action during this period of time in, the A.C. contactor KM1 elder generation action in alternating current power supply A, this Time A.C. contactor KM1 coil KM1B be in electric, the normally-closed contact KM1A of A.C. contactor KM1 break Open, the normally opened contact KM1C Guan Bi of A.C. contactor KM1, alternating current circuit A take the lead in powering, due to electrically Interlocking, the A.C. contactor KM2 in alternating current power supply B is failure to actuate, it is to avoid A.C. contactor KM1 with exchange Catalyst KM2 competition action causes alternating current power supply A and alternating current power supply B instantaneous short circuit.
Embodiment three:
With reference to Fig. 4, embodiment three is essentially identical with embodiment two, and its difference is: described selection controls Unit includes AC relay RLY2 and AC relay RLY3, coil one end of described RLY2 and described zero Line N connects, and the other end accesses the live wire of described alternating current power supply B;The normally opened contact of described RLY2 and described friendship One end of the coil of current relay RLY3 is connected, and the other end of the coil of described AC relay RLY3 accesses Described zero line N;The normally opened contact of described AC relay RLY3 is connected with the other end of described coil KM2B.
Operation principle: embodiment three is essentially identical with the operation principle of embodiment two, and it is a difference in that selection Control unit is composed in series by AC relay RLY2 and AC relay RLY3, is selecting control unit The when of work, AC relay RLY2 and AC relay RLY3 action successively, increase follow-up with this The circuit operation time reaches the purpose of time delay, for avoiding A.C. contactor KM1 and A.C. contactor KM2 Competition action causes alternating current power supply A and alternating current power supply B instantaneous short circuit to provide the more time.
Certainly, in the present invention, the quantity of AC relay is not limited solely in the present invention cited by embodiment Scope, it is also possible to relay types and required delay time according to actual selection further increase to 3 Individual, 4,5 ... as long as the purpose of the present invention can be realized.
In the present invention, alternating current power supply A is three-phase alternating current, and its three roads live wire is LA1, LA2, LA3, alternating current Source B is three-phase electricity, and its three roads live wire is LB1, LB2, LB3, accordingly, A.C. contactor KM1 with exchange The normally opened contact of catalyst KM2 is the most all three;Certainly, in alternating current power supply A or alternating current power supply B only The when of use wherein a road or two-way live wire, the present invention stands good.
Described above illustrate and describes the preferred embodiments of the present invention, as previously mentioned, it should be understood that the present invention It is not limited to form disclosed herein, is not to be taken as the eliminating to other embodiments, and can be used for each Plant other combinations, amendment and environment, and can be in invention contemplated scope described herein, by above-mentioned teaching Or the technology of association area or knowledge are modified.And the change that those skilled in the art are carried out and change without departing from The spirit and scope of the present invention, the most all should be in the protection domain of claims of the present invention.

Claims (7)

1. double loop power supply automatic switching power supply circuits, including alternating current power supply A and alternating current power supply B, its feature exists In: include interconnective selection control unit and interlocking control unit;
Described interlocking control unit includes the A.C. contactor KM1 and A.C. contactor KM2 of interlocking connection;Wherein The normally opened contact KM1C series connection of described A.C. contactor KM1 accesses live wire and the load of described alternating current power supply A Between, the normally opened contact KM2C series connection of described A.C. contactor KM2 accesses the live wire of described alternating current power supply B and bears Between load;
Described selection control unit is in order to control to select normally opened contact KM1C or the institute of described A.C. contactor KM1 State the adhesive of the normally opened contact KM2C of A.C. contactor KM2, and avoid described alternating current power supply A and described friendship When stream power supply B sends a telegram here simultaneously, two-way power supply competes the short circuit caused.
2. double loop power supply automatic switching power supply circuits as claimed in claim 1, it is characterised in that: described mutually Lock connected mode is: zero line N, the other end are accessed in normally-closed contact KM1A one end of described A.C. contactor KM1 It is connected with one end of the coil KM2B of described A.C. contactor KM2;The other end of described coil KM2B and institute State selection control unit to connect;Zero line N is accessed in normally-closed contact KM2A one end of described A.C. contactor KM2, The other end is connected with one end of the coil KM1B of described A.C. contactor KM1, another of described coil KM1B End connects with the live wire of described alternating current power supply A.
3. double loop power supply automatic switching power supply circuits as claimed in claim 2, it is characterised in that: described choosing Select control unit and include A.C. contactor KM3.
4. double loop power supply automatic switching power supply circuits as claimed in claim 2, it is characterised in that: described choosing Select control unit and include at least one AC relay RLY.
5. double loop power supply automatic switching power supply circuits as claimed in claim 3, it is characterised in that: described friendship The other end of the normally opened contact KM3C and described coil KM2B of stream catalyst KM3 is connected, coil KM3B one end Being connected with described zero line N, the other end is connected with the live wire of described alternating current power supply B.
6. double loop power supply automatic switching power supply circuits as claimed in claim 4, it is characterised in that: described friendship The normally opened contact of current relay RLY1 is connected with the other end of described coil KM2B, described AC relay RLY1 Coil one end access described zero line N, the other end access described alternating current power supply B live wire.
7. double loop power supply automatic switching power supply circuits as claimed in claim 4, it is characterised in that: described choosing Select control unit and include AC relay RLY2 and AC relay RLY3, coil one end of described RLY2 with Described zero line N connects, and the other end accesses the live wire of described alternating current power supply B;The normally opened contact of described RLY2 with One end of the coil of described AC relay RLY3 is connected, another of the coil of described AC relay RLY3 Terminate into described zero line N;The normally opened contact of described AC relay RLY3 and the other end of described coil KM2B Connect.
CN201610459935.5A 2016-06-22 2016-06-22 Two-way power supply automatic switching power supply circuit Pending CN105958633A (en)

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CN108448711A (en) * 2018-05-24 2018-08-24 华润新能源(连州)风能有限公司 A kind of illumination switching device
CN112233931A (en) * 2020-09-23 2021-01-15 国网山东省电力公司潍坊供电公司 Load switch device with PT (potential transformer) and installation construction method
CN112350554A (en) * 2020-11-06 2021-02-09 株洲壹星科技股份有限公司 Multi-path power supply collinear method and device
TWI754909B (en) * 2020-03-30 2022-02-11 台達電子工業股份有限公司 Powre supply system with automatic transfer switches

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CN204886397U (en) * 2015-07-22 2015-12-16 金陵科技学院 Stand -by power supply automatic switch -over circuit
CN205319792U (en) * 2015-12-22 2016-06-15 易勇 Double power source switch circuit and double power source switch system
CN205693434U (en) * 2016-06-22 2016-11-16 中航太克(厦门)电力技术股份有限公司 Double loop power supply automatic switching power supply circuits

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108448711A (en) * 2018-05-24 2018-08-24 华润新能源(连州)风能有限公司 A kind of illumination switching device
TWI754909B (en) * 2020-03-30 2022-02-11 台達電子工業股份有限公司 Powre supply system with automatic transfer switches
CN112233931A (en) * 2020-09-23 2021-01-15 国网山东省电力公司潍坊供电公司 Load switch device with PT (potential transformer) and installation construction method
CN112233931B (en) * 2020-09-23 2023-09-29 国网山东省电力公司潍坊供电公司 Load switch device with PT and installation construction method
CN112350554A (en) * 2020-11-06 2021-02-09 株洲壹星科技股份有限公司 Multi-path power supply collinear method and device

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Application publication date: 20160921