CN116388181A - Intelligent control system of distribution room - Google Patents
Intelligent control system of distribution room Download PDFInfo
- Publication number
- CN116388181A CN116388181A CN202310459980.0A CN202310459980A CN116388181A CN 116388181 A CN116388181 A CN 116388181A CN 202310459980 A CN202310459980 A CN 202310459980A CN 116388181 A CN116388181 A CN 116388181A
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- phase sequence
- indicator lamp
- sequence indicator
- phase
- power supply
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- 238000000819 phase cycle Methods 0.000 claims abstract description 176
- 230000005611 electricity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Classifications
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Distribution Board (AREA)
Abstract
The invention relates to an intelligent control system of a power distribution room, which comprises the following components: the power supply circuit, the control circuit and the display circuit; the power supply circuit includes: switch QS and contactor KM electrically connected with three-phase bus in turn 1 A phase sequence relay JVR and a contactor KM are electrically connected at the three-phase outlet of the switch QS 1 The upper parallel connection is provided with a contactor KM 2 The method comprises the steps of carrying out a first treatment on the surface of the The control circuit includes: contactor KM 1 Contact KM 2 A start button, a stop button; the display circuit includes: and the indicator lamp group is used for displaying the power supply state and the switching state. The intelligent control system for the power distribution room provided by the invention can be used for adaptively adjusting the three-phase line sequence of the outlet side.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to an intelligent control system of a distribution room.
Background
The three-phase power supply is an important power supply mode for industrial and domestic electricity. Wherein each phase is an alternating current and the phases of the three phases are sequentially retarded by 120 degrees. For three-phase electric equipment, such as a three-phase motor, when reverse operation occurs, only the line sequence of two phases is required to be adjusted, and the forward operation is restored.
At present, along with the construction of a power grid, the transformation of a transformer area, more and more three-phase electric equipment enters a customer's home, phase sequence protection is particularly important, and because of reasons such as construction and line replacement, the phase sequence is easily disordered, and inconvenience is brought to the customer, therefore, the research of a phase sequence protection switch with an intelligent switch protection function is urgent, and the intelligent control system of a power distribution room has important significance.
Therefore, an adjusting device capable of adapting to the three-phase wire sequence is needed.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides an intelligent control system for a distribution room, which is used for adaptively adjusting the three-phase line sequence of an outlet side.
The invention adopts the technical scheme that:
intelligent control system of electricity distribution room includes: the display device comprises a power supply circuit, a control circuit and a display circuit.
The power supply circuit includes:
switch QS and contactor KM electrically connected with three-phase bus in turn 1 A phase sequence relay JVR and a contactor KM are electrically connected at the three-phase outlet of the switch QS 1 The upper parallel connection is provided with a contactor KM 2 。
The control circuit includes:
for controlling the contactor KM 1 Contact KM 2 An active button and a stop button for operation and deactivation.
The display circuit includes:
and the indicator lamp group is used for displaying the power supply state and the switching state.
Further, the control circuit is configured as an interlock circuit, and the interlock circuit is electrically connected with the two-phase bus, and includes that are connected in series with each other:
a normally closed contact of the stop button;
normally open contact of starting button and contactor KM 1 Normally open contact of (a) contactor KM 2 Are arranged in parallel with each other;
contactor KM 1 Normally closed contact of coil, phase sequence relay JVR and contactor KM 2 The normally open contacts of the phase sequence relay JVR are arranged in parallel with each other.
Further, the control system further includes: the cabinet body is externally hinged with a cabinet door;
the cabinet body is internally provided with a fixed switch QS, a phase sequence relay JVR and a contactor KM 1 Contact KM 2 ；
And the cabinet door is fixedly provided with an indicating lamp group, a starting button and a stopping button.
Further, the stop button and the start button are arranged on the upper portion of the cabinet door side by side.
Further, the indicating lamp group is arranged in the center of the cabinet door.
Further, the indicator light group includes:
the power supply indicator lamp A, the power supply indicator lamp B and the power supply indicator lamp C are used for displaying the power supply state;
the phase sequence indicator lamp A, the phase sequence indicator lamp B, the phase sequence indicator lamp C, the phase sequence indicator lamp D, the phase sequence indicator lamp E and the phase sequence indicator lamp F are used for displaying a first group of switching states;
phase sequence indicator lamp A, phase sequence indicator lamp B, phase sequence indicator lamp G, phase sequence indicator lamp H, phase sequence indicator lamp I and phase sequence indicator lamp J for displaying the second group of switching states.
Further, the power supply indicator lamp A, the power supply indicator lamp B and the power supply indicator lamp C are arranged on the upper portion of the center of the cabinet door in parallel, and are respectively arranged at three-phase outgoing line positions of the switch QS in parallel and used for displaying the running state of the switch QS.
Further, an indicator lamp set for switching states and a contactor KM 1 Contact KM 2 The parallel two-phase outgoing line is electrically connected, comprising in parallel with each other:
a phase sequence indicator lamp A;
phase sequence indicator lamp B;
the phase sequence indicator lamp C, the phase sequence indicator lamp D, the phase sequence indicator lamp E and the phase sequence indicator lamp F are mutually connected in parallel and are connected in series with the normally closed contact of the phase sequence relay JVR;
the phase sequence indicator lamp G, the phase sequence indicator lamp H, the phase sequence indicator lamp I and the phase sequence indicator lamp J are mutually connected in parallel and are connected in series with the normally open contact of the phase sequence relay JVR.
Further, the power supply indicator lamp A, the phase sequence indicator lamp A and the phase sequence indicator lamp B are sequentially arranged on the left side of the center of the cabinet door from top to bottom;
the power supply indicator lamp B, the phase sequence indicator lamp C and the phase sequence indicator lamp D are sequentially arranged in the middle of the center of the cabinet door from top to bottom;
the power supply indicator lamp C, the phase sequence indicator lamp E and the phase sequence indicator lamp F are sequentially arranged on the right side of the center of the cabinet door from top to bottom.
Further, the phase sequence indicator lamp H is arranged on one side of the phase sequence indicator lamp F in parallel;
the phase sequence indicator lamp J is arranged on one side of the phase sequence indicator lamp D in parallel;
the phase sequence indicator lamp G is obliquely arranged between the lower part of the power supply indicator lamp B and the upper part of the phase sequence indicator lamp H;
the phase sequence indicator lamp I is obliquely arranged between the lower part of the power supply indicator lamp C and the upper part of the phase sequence indicator lamp D.
The intelligent control system of the distribution room has the advantages that:
1. confirming the line sequence condition through a phase sequence relay JVR;
2. through a phase sequence relay JVR and a contactor KM connected in parallel with each other 1 Contact KM 2 The line sequence of the switching power supply circuit is a normal line sequence;
3. the switching state of the line sequence is clarified through the indicator lamp group.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, and the drawings in the following description are embodiments of the present invention.
FIG. 1 is a schematic perspective view of an intelligent control system for a power distribution room according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing a second general perspective view of an intelligent control system for a power distribution room according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of an intelligent control system for a power distribution room according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a second circuit diagram of an intelligent control system for a power distribution room according to an embodiment of the present invention;
FIG. 5 is a schematic circuit diagram III of an intelligent control system for a power distribution room according to an embodiment of the present invention;
fig. 6 is a schematic flow chart of an intelligent control system for a power distribution room according to an embodiment of the present invention.
In the figure:
90. the cabinet body, 9 and the cabinet door,
81. a stop button, 82, a start button,
4. the switching means QS is arranged to switch,
5. the phase sequence relay JVR is provided with a phase sequence,
61. contactor KM 1 62 contactor KM 2 ，
1. An indication lamp set is arranged on the upper surface of the shell,
L 11 power supply indicator lamps A, L 21 Power supply indicator lamp B, L 31 A power supply indicator light C, wherein the power supply indicator light C,
L 12 phase sequence indicator lamps A, L 13 A phase sequence indicator light B,
L 22 phase sequence indicator lights C, L 23 A phase sequence indicator light D,
L 32 phase sequence indicator lamp E, L 33 A phase sequence indicator light F,
L 24 phase sequence indicator lamp G, L 25 A phase sequence indicator lamp H,
L 34 phase sequence indicator lamp I, L 35 Phase sequence indicator lamp J.
Detailed Description
In order to more clearly and clearly describe the specific implementation objects and embodiments of the present invention, the following description will fully describe the technical solutions of the present invention, and the described embodiments are some, but not all, embodiments of the present invention. All other embodiments based on the described embodiments of the invention fall within the scope of the invention without making inventive efforts.
The intelligent control system of the power distribution room of the invention, as shown in figure 1, comprises: the cabinet body 90, the cabinet door 91 is hinged outside the cabinet body 90; the cabinet body 90 is internally provided with a fixed switch QS 4, a phase sequence relay JVR 5 and a contactor KM 1 61. Contactor KM 2 62; the cabinet door 91 is fixed with an indicator lamp group 1, a start button 82 and a stop button 81.
A control system, comprising: the power supply circuit, the control circuit and the display circuit;
the power supply circuit, as shown in fig. 2, includes:
switch QS 4 and contactor KM electrically connected with three-phase bus in sequence 1 61, a phase sequence relay JVR 5 and a contactor KM are electrically connected to the three-phase outlet of the switch QS 4 1 61 are connected in parallel with a contactor KM 2 62。
The control circuit is configured as an interlock circuit, as shown in fig. 3, comprising:
for controlling the contactor KM 1 61. Contactor KM 2 62, an active, inactive start button 82, and a stop button 81.
The interlocking circuit is electrically connected with the two-phase bus and comprises the following components in series connection with each other:
a normally closed contact of the stop button 81;
normally open contact of start button 82, contactor KM 1 61 normally open contact, contactor KM 2 62 are arranged in parallel with each other;
The stop button 81 and the start button 82 are arranged in parallel on the upper portion of the cabinet door 91.
The display circuit includes:
an indicator lamp set 1 for displaying a power supply state and a switching state, wherein the indicator lamp set 1 is arranged in the center of a cabinet door 91, and comprises:
power supply indicator light A L for displaying power supply state 11 Power supply indicator lamp B L 21 Power supply indicator lamp C L 31 As shown in fig. 1 and 4, the power supply indicator lamp A L 11 Power supply indicator lamp B L 21 Power supply indicator lamp C L 31 The three-phase outlet wires are arranged on the upper part of the center of the cabinet door 91 in parallel and are respectively arranged at the three-phase outlet wire positions of the switch QS 4 in parallel and are used for displaying the running state of the switch QS 4;
phase sequence indicator A L for displaying a first set of switching states 12 Phase sequence indicator B L 13 Phase sequence indicator C L 22 Phase sequence indicator D L 23 Phase sequence indicator E L 32 Phase sequence indicator F L 33 As shown in fig. 5, the phase sequence indicator A L 12 Phase sequence indicator B L 13 Phase sequence indicator C L 22 Phase sequence indicator D L 23 Phase sequence indicator E L 32 Phase sequence indicator F L 33 With contactor KM 1 61. Contactor KM 2 62, the parallel circuit comprising:
phase sequence indicator A L 12 ；
Phase sequence indicator B L 13 ；
Phase sequence indicator C L 22 Phase sequence indicator D L 23 Phase sequence indicator E L 32 Phase sequence indicator F L 33 Are connected in parallel with each other and are connected in series with the normally closed contacts of the phase sequence relay JVR 5;
phase sequence indicator G L 24 Phase sequence indicator H L 25 Phase sequence indicator I L 34 Phase sequence indicator J L 35 Are connected in parallel with each other and are connected in series with the normally open contacts of the phase sequence relay JVR.
Phase sequence indicator A L for displaying the second set of switching states 12 Phase sequence indicator B L 13 Phase sequence indicator G L 24 Phase sequence indicator H L 25 Phase sequence indicator I L 34 Phase sequence indicator J L 35 。
As shown in fig. 1, a power supply indicator light A L 11 Phase sequence indicator A L 12 Phase sequence indicator B L 13 Left power supply indicator lamp B L sequentially arranged in center of cabinet door 91 from top to bottom 21 Phase sequence indicator C L 22 Phase sequence indicator D L 23 The middle part of the center of the cabinet door 91 is sequentially arranged from top to bottom; power supply indicator lamp C L 31 Phase sequence indicator E L 32 Phase sequence indicator F L 33 And are sequentially arranged on the right side of the center of the cabinet door 91 from top to bottom.
As shown in fig. 1, a phase sequence indicator light H L 25 Are arranged in parallel on the phase sequence indicator lamp F L 33 Is arranged on one side of the (2); phase sequence indicator J L 35 Are arranged in parallel on the phase sequence indicator lamp D L 23 Is arranged on one side of the (2); phase sequence indicator G L 24 Obliquely arranged on the power supply indicator lamp B L 21 Lower part and phase sequence indicator lamp H L 25 The upper parts are arranged between the upper parts; phase sequence indicator I L 34 Obliquely arranged on the power supply indicator lamp C L 31 Lower part and phase sequence indicator lamp D L 23 Between the upper parts.
According to the specific structure of the intelligent control system for the power distribution room in the above embodiment, the following further describes the line sequence adjustment method with reference to fig. 6:
A. initializing:
switch QS 4 is closed, and phase sequence relay JVR 5 in the system is powered on to initialize;
power supply indicator lamp A L 11 Power supply indicator lamp B L 21 Power supply indicator lamp C L 31 And is lit up to indicate power-up on the power supply side.
B1, no phase modulation-power supply:
phase sequence relay JVR 5 does not require phase modulation;
pressing the start button 82, contactor KM 1 61 are electrically closed and in an operating state, phase sequence indicator A L 12 Phase sequence indicator B L 13 Phase sequence indicator C L 22 Phase sequence indicator D L 23 Phase sequence indicator E L 32 Phase sequence indicator F L 33 The lighting indicates that the power supply side and the power utilization side do not need to conduct phase modulation for power supply.
B2, phase modulation-power supply:
phase sequence relay JVR 5 requires phase modulation;
pressing the start button 82, contactor KM 2 62 are electrically closed and in operation, phase sequence indicator A L 12 Phase sequence indicator B L 13 Phase sequence indicator G L 24 Phase sequence indicator H L 25 Phase sequence indicator I L 34 Phase sequence indicator J L 35 And the lighting is used for indicating that the power supply side and the power utilization side need to carry out phase modulation for power supply.
C1, power failure:
pressing the stop button 81, contactor KM 1 61 power-off stop operation, phase sequence indicator A L 12 Phase sequence indicator B L 13 Phase sequence indicator C L 22 Phase sequence indicator D L 23 Phase sequence indicator E L 32 Phase sequence indicator F L 33 And is turned off to indicate that no power is supplied to the power utilization side.
C2, power failure:
pressing the stop button 81, contactor KM 2 62 cut-off stop operation, phase sequence indicator A L 12 Phase sequence indicator B L 13 Phase sequence indicator G L 24 Phase sequence indicator H L 25 Phase(s)Sequence indicator light I L 34 Phase sequence indicator J L 35 And is turned off to indicate that no power is supplied to the power utilization side.
In the steps B1 and B2, the contactor KM 1 61. Contactor KM 2 62 are in an interlocked state.
In the steps C1 and C2, the contactor KM 1 61. Contactor KM 2 62 are in an interlocked state.
Based on the above, the embodiment of the intelligent control system for a power distribution room according to the present invention is taught, and by the above description, related workers can make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. Intelligent control system of electricity distribution room, its characterized in that:
the control system includes: the power supply circuit, the control circuit and the display circuit;
the power supply circuit includes:
a switch QS (4) and a contactor KM which are electrically connected with the three-phase bus in sequence 1 (61) A phase sequence relay JVR (5) is arranged at the three-phase outlet of the switch QS (4) in an electrical connection manner, and a contactor KM is arranged at the three-phase outlet of the switch QS 1 (61) The upper parallel connection is provided with a contactor KM 2 (62)；
The control circuit includes:
for controlling the contactor KM 1 (61) Contact KM 2 (62) A start button (82) and a stop button (81) for running and stopping;
the display circuit includes:
an indicator lamp group (1) for displaying the power supply state and the switching state.
2. The intelligent control system of a power distribution room of claim 1, wherein:
the control circuit is arranged as an interlocking circuit, and the interlocking circuit is electrically connected with the two-phase bus and comprises the following components in series connection with each other:
a normally closed contact of the stop button (81);
normally open contact of start button (82), contactor KM 1 (61) Normally open contact of (a) contactor KM 2 (62) Are arranged in parallel with each other;
contactor KM 1 (61) Normally closed contact of phase sequence relay JVR (5) and contactor KM 2 (62) The coil of (2) and the normally open contact of the phase sequence relay JVR (5) are arranged in parallel.
3. The intelligent control system of a power distribution room of claim 1, wherein:
the control system further comprises: the cabinet comprises a cabinet body (90), wherein a cabinet door (91) is hinged outside the cabinet body (90);
a switch QS (4), a phase sequence relay JVR (5) and a contactor KM are fixed in the cabinet body (90) 1 (61) Contact KM 2 (62)；
The cabinet door (91) is fixedly provided with an indicator lamp group (1), a start button (82) and a stop button (81).
4. The intelligent control system for a power distribution room according to claim 3, wherein:
the stop button (81) and the start button (82) are arranged on the upper portion of the cabinet door (91) side by side.
5. The intelligent control system for a power distribution room according to claim 3, wherein:
the indicator lamp group (1) is arranged in the center of the cabinet door (91).
6. The intelligent control system for a power distribution room of claim 5, wherein:
the indicator light group (1) comprises:
power supply indicator lamp A (L) 11 ) Power supply indicator lamp B (L) 21 ) Power supply indicator lamp C (L) 31 )；
Phase sequence indicator light for displaying first group of switching statesA(L 12 ) Phase sequence indicator lamp B (L) 13 ) Phase sequence indicator light C (L) 22 ) Phase sequence indicator lamp D (L) 23 ) Phase sequence indicator lamp E (L) 32 ) Phase sequence indicator lamp F (L) 33 )；
Phase sequence indicator light a (L 12 ) Phase sequence indicator lamp B (L) 13 ) Phase sequence indicator G (L) 24 ) Phase sequence indicator lamp H (L) 25 ) Phase sequence indicator lamp I (L) 34 ) Phase sequence indicator lamp J (L) 35 )。
7. The intelligent control system of a power distribution room of claim 6, wherein:
the power supply indicator lamp A (L 11 ) Power supply indicator lamp B (L) 21 ) Power supply indicator lamp C (L) 31 ) The three-phase outlet wires are arranged on the upper part of the center of the cabinet door (91) in parallel and are respectively arranged at the three-phase outlet wire positions of the switch QS (4) in parallel and used for displaying the running state of the switch QS (4).
8. The intelligent control system for a power distribution room of claim 7, wherein:
indicator lamp group (1) for switching state and contactor KM 1 (61) Contact KM 2 (62) The parallel two-phase outgoing line is electrically connected, comprising in parallel with each other:
phase sequence indicator lamp A (L) 12 )；
Phase sequence indicator lamp B (L) 13 )；
Phase sequence indicator light C (L) 22 ) Phase sequence indicator lamp D (L) 23 ) Phase sequence indicator lamp E (L) 32 ) Phase sequence indicator lamp F (L) 33 ) Are connected in parallel with each other and are connected in series with the normally closed contacts of the phase sequence relay JVR (5);
phase sequence indicator G (L) 24 ) Phase sequence indicator lamp H (L) 25 ) Phase sequence indicator lamp I (L) 34 ) Phase sequence indicator lamp J (L) 35 ) Are connected in parallel with each other and are connected in series with the normally open contacts of the phase sequence relay JVR (5).
9. The intelligent control system of a power distribution room of claim 8, wherein:
the power supply indicator lamp A (L 11 ) Phase sequence indicator lamp A (L) 12 ) Phase sequence indicator lamp B (L) 13 ) The left side of the center of the cabinet door (91) is sequentially arranged from top to bottom;
the power supply indicator lamp B (L 21 ) Phase sequence indicator light C (L) 22 ) Phase sequence indicator lamp D (L) 23 ) The middle part of the center of the cabinet door (91) is sequentially arranged from top to bottom;
the power supply indicator lamp C (L 31 ) Phase sequence indicator lamp E (L) 32 ) Phase sequence indicator lamp F (L) 33 ) The cabinet door (91) is sequentially arranged on the right side of the center of the cabinet door from top to bottom.
10. The intelligent control system of a power distribution room of claim 9, wherein:
the phase sequence indicator lamp H (L 25 ) Are arranged in parallel with the phase sequence indicator lamp F (L) 33 ) Is arranged on one side of the (2);
the phase sequence indicator lamp J (L 35 ) Are arranged in parallel with phase sequence indicator lights D (L) 23 ) Is arranged on one side of the (2);
the phase sequence indicator light G (L 24 ) Is obliquely arranged on the power supply indicator lamp B (L) 21 ) Lower and phase sequence indicator lamp H (L 25 ) The upper parts are arranged between the upper parts;
the phase sequence indicator lamp I (L) 34 ) Is obliquely arranged on the power supply indicator lamp C (L 31 ) Lower and phase sequence indicator lamp D (L 23 ) Between the upper parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310459980.0A CN116388181A (en) | 2023-04-26 | 2023-04-26 | Intelligent control system of distribution room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310459980.0A CN116388181A (en) | 2023-04-26 | 2023-04-26 | Intelligent control system of distribution room |
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| Publication Number | Publication Date |
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| CN116388181A true CN116388181A (en) | 2023-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310459980.0A Pending CN116388181A (en) | 2023-04-26 | 2023-04-26 | Intelligent control system of distribution room |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634369A (en) * | 2014-11-04 | 2016-06-01 | 天津港太平洋国际集装箱码头有限公司 | Three phase power source phase sequence detection and automatic switching control circuit |
| CN208608730U (en) * | 2018-07-13 | 2019-03-15 | 长江上海航道处 | Bank electricity phase sequence automatic transfer equipment peculiar to vessel |
| CN214177196U (en) * | 2020-12-29 | 2021-09-10 | 郑州科步科技有限公司 | Automatic corotation mechanism of oil pump motor |
| CN216649310U (en) * | 2021-12-13 | 2022-05-31 | 武汉诚邦信合科技有限公司 | Shore power box control circuit and shore power box |
| US20220329175A1 (en) * | 2020-10-21 | 2022-10-13 | Crrc Nanjing Puzhen Co., Ltd. | Dual Start Control Circuit for Auxiliary Inverters of Railway Vehicle |
-
2023
- 2023-04-26 CN CN202310459980.0A patent/CN116388181A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634369A (en) * | 2014-11-04 | 2016-06-01 | 天津港太平洋国际集装箱码头有限公司 | Three phase power source phase sequence detection and automatic switching control circuit |
| CN208608730U (en) * | 2018-07-13 | 2019-03-15 | 长江上海航道处 | Bank electricity phase sequence automatic transfer equipment peculiar to vessel |
| US20220329175A1 (en) * | 2020-10-21 | 2022-10-13 | Crrc Nanjing Puzhen Co., Ltd. | Dual Start Control Circuit for Auxiliary Inverters of Railway Vehicle |
| CN214177196U (en) * | 2020-12-29 | 2021-09-10 | 郑州科步科技有限公司 | Automatic corotation mechanism of oil pump motor |
| CN216649310U (en) * | 2021-12-13 | 2022-05-31 | 武汉诚邦信合科技有限公司 | Shore power box control circuit and shore power box |
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