CN215009751U - Control circuit for two-station automatic transfer switching device - Google Patents

Control circuit for two-station automatic transfer switching device Download PDF

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Publication number
CN215009751U
CN215009751U CN202121498929.3U CN202121498929U CN215009751U CN 215009751 U CN215009751 U CN 215009751U CN 202121498929 U CN202121498929 U CN 202121498929U CN 215009751 U CN215009751 U CN 215009751U
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power supply
contactor
switch
controller
micro
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杨海军
管柯
韩俊贤
顾小群
高阳
吴晓亚
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Wuxi Hankwang Electric Co ltd
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Wuxi Hankwang Electric Co ltd
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    • 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

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Abstract

The utility model relates to an automatic change over switch electrical apparatus technical field specifically discloses a control circuit for two station automatic change over switch electrical apparatus, wherein, include: the first contactor, the second contactor, main combined floodgate coil, the rectifier bridge, first micro-gap switch unit and second micro-gap switch unit, the power binding post commonly used of controller is connected to the one end of first contactor, the stand-by power supply binding post of controller is connected to the one end of second contactor, two inputs of rectifier bridge are connected respectively to the other end of first contactor and the other end of second contactor, the both ends of main combined floodgate coil are connected respectively to two outputs of rectifier bridge, first micro-gap switch unit and second micro-gap switch unit all are connected with main combined floodgate coil, main combined floodgate coil still connects the primary circuit switch of power commonly used and the primary circuit switch of stand-by power supply respectively. The utility model provides a control circuit for two station automatic transfer switch electrical apparatus can realize two station power fast switch-over.

Description

Control circuit for two-station automatic transfer switching device
Technical Field
The utility model relates to an automatic change over switch electrical apparatus technical field especially relates to a control circuit for two station automatic change over switch electrical apparatus.
Background
The special excitation type automatic change-over switch electric appliance with large capacity specification has a plurality of switch structural parts, the switching speed of a power supply system is required to be high and is generally lower than 0.5 second, so that the traditional alternating current or direct current motor driving mode cannot be used for driving the change-over mechanism, and the traditional change-over driving mechanism needs 1.5 seconds or more for completing the change-over between power supplies. However, an excitation driving structure is adopted, and an electromagnetic structure system is complex and occupies a large space.
The automatic transfer switching device realizes the transfer between two power supplies, and particularly, the transfer time between the power supplies is required to be less than 0.5 second for the first and second buildings, and the action is reliable. Therefore, how to provide a control circuit suitable for a two-position automatic transfer switching device becomes a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The utility model provides a control circuit for two station automatic transfer switch electrical apparatus solves the unable power fast switch-over problem that realizes two station automatic transfer switch electrical apparatus that exists among the correlation technique.
As an aspect of the utility model, a control circuit for two station automatic transfer switch electrical apparatus is provided, wherein, include:
the intelligent controller comprises a first contactor, a second contactor, a main closing coil, a rectifier bridge, a first micro switch unit and a second micro switch unit, wherein one end of the first contactor is connected with a common power supply wiring terminal of the controller, one end of the second contactor is connected with a standby power supply wiring terminal of the controller, the other end of the first contactor and the other end of the second contactor are respectively connected with two input ends of the rectifier bridge, two output ends of the rectifier bridge are respectively connected with two ends of the main closing coil, the first micro switch unit and the second micro switch unit are both connected with the main closing coil, the main closing coil is also respectively connected with a primary loop switch of a common power supply and a primary loop switch of a standby power supply,
when the primary loop switch of the common power supply is closed and the primary loop switch of the standby power supply is disconnected, the first micro switch unit can control the attraction coil of the second contactor to be electrified according to a received second power supply conversion signal of the controller, and the main closing coil can control the primary loop switch of the standby power supply to be closed and control the primary loop switch of the common power supply to be disconnected after the attraction coil of the second contactor is electrified so as to realize the switching from the working position of the common power supply to the working position of the standby power supply;
when a primary loop switch of the standby power supply is closed and a primary loop switch of the common power supply is disconnected, the first micro switch unit can control an attraction coil of the first contactor to be electrified according to a received first power supply conversion signal of the controller, and the main closing coil can control the primary loop switch of the common power supply to be closed and control the primary loop switch of the standby power supply to be disconnected after the attraction coil of the first contactor is electrified so as to realize the switching of the working position of the standby power supply to the working position of the common power supply;
the main closing coil can also control the change of the second micro switch unit after the suction coil of the second contactor is electrified so as to feed back an indication signal of converting a common power supply into a standby power supply to the controller;
the main closing coil can also control the change of the second micro switch unit after the suction coil of the first contactor is electrified so as to feed back an indication signal of converting the standby power supply into a common power supply to the controller.
Further, the one end of the first normal open point of first contactor is connected the first binding post of the power commonly used of controller, the one end of the first normal open point of second contactor is connected the first binding post of stand-by power supply of controller, the other end of the first normal open point of first contactor with the other end of the first normal open point of second contactor all connects the first input of rectifier bridge, the one end of the second normal open point of first contactor is connected the second binding post of power commonly used of controller, the one end of the second normal open point of second contactor is connected the stand-by power supply second binding post of controller, the other end of the second normal open point of first contactor with the other end of the second normal open point of second contactor all connects the second input of rectifier bridge.
Further, the first microswitch unit comprises:
a first microswitch and a second microswitch,
one end of a normally closed point of the first micro switch is connected with a first switch-on output terminal of a common power supply of the controller, the other end of the normally closed point of the first micro switch is connected with one input end of an attraction coil of the first contactor, and the other input end of the attraction coil of the first contactor is connected with a second switch-on output terminal of the common power supply of the controller;
the normally closed point one end of the second micro switch is connected with a first switch-on output terminal of a standby power supply of the controller, the normally closed point other end of the second micro switch is connected with an input end of an attraction coil of the second contactor, and another input end of the attraction coil of the second contactor is connected with a second switch-on output terminal of the standby power supply of the controller.
Further, the second microswitch unit comprises:
a first set of micro-switches and a second set of micro-switches,
the first group of micro switches and the second group of micro switches are connected with the state input terminal of the controller, the first group of micro switches are linked with the primary loop switch of the common power supply, the second group of micro switches are linked with the primary loop switch of the standby power supply,
when the primary loop switch of the common power supply is switched from on to off and the primary loop switch of the standby power supply is switched from off to on, the first group of micro switches is switched from on to off and the second group of micro switches is switched from off to on;
when the primary loop switch of the common power supply is switched from open to closed and the primary loop switch of the standby power supply is switched from closed to open, the first group of micro switches is switched from open to closed and the second group of micro switches is switched from closed to open.
Further, the first set of micro-switches comprises: the controller comprises a third microswitch and a fourth microswitch, wherein both ends of a normally open point of the third microswitch and both ends of a normally open point of the fourth microswitch are connected with the state input terminal of the controller.
Further, the third and fourth microswitches each comprise a single pole double throw switch.
Further, the second set of micro-switches comprises: the controller comprises a fifth micro switch and a sixth micro switch, and both ends of a normally open point of the fifth micro switch and both ends of a normally open point of the sixth micro switch are connected with the state input terminals of the controller.
Further, the fifth and sixth microswitches each comprise a single pole double throw switch.
The utility model provides a control circuit for two station automatic transfer switch electrical apparatus, through the combined circuit of first contactor, second contactor, micro-gap switch unit and main combined floodgate coil, realize the reliable switching between power commonly used and the stand-by power supply, guaranteed the continuous reliable operation of load, and circuit structure is simple reliable, can not take place the malfunction, can accomplish the switching between the power supply system fast. Additionally, the embodiment of the utility model provides a this kind of control circuit only needs one set of main combined floodgate coil can accomplish the fast switch-over between the electrical power generating system, and is with low costs and simple structure.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic circuit diagram of a control circuit for a two-position automatic transfer switching device provided by the utility model.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances for purposes of describing the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this embodiment, a control circuit for a two-position automatic transfer switching device is provided, fig. 1 is a schematic circuit diagram of a control circuit for a two-position automatic transfer switching device according to an embodiment of the present invention, as shown in fig. 1, including:
the control system comprises a first contactor KM1, a second contactor KM2, a main closing coil CC, a rectifier bridge Si, a first micro switch unit 100 and a second micro switch unit 200, wherein one end of the first contactor KM1 is connected with a common power supply wiring terminal of a controller, one end of the second contactor KM2 is connected with a standby power supply wiring terminal of the controller, the other end of the first contactor KM1 and the other end of the second contactor KM2 are respectively connected with two input ends of the rectifier bridge Si, two output ends of the rectifier bridge Si are respectively connected with two ends of the main closing coil CC, the first micro switch unit 100 and the second micro switch unit 200 are both connected with the main closing coil CC, the main closing coil CC is also respectively connected with a primary loop switch K1 of a common power supply and a primary loop switch K2 of a standby power supply,
when the primary loop switch K1 of the common power supply is closed and the primary loop switch K2 of the standby power supply is disconnected, the first micro switch unit 100 can control the attraction coil of the second contactor KM2 to be powered on according to a received second power supply switching signal of the controller, and the main closing coil CC can control the primary loop switch K2 of the standby power supply to be closed and control the primary loop switch K1 of the common power supply to be disconnected after the attraction coil of the second contactor KM2 is powered on, so that the working position of the common power supply is switched to the working position of the standby power supply;
when the primary loop switch K2 of the standby power supply is closed and the primary loop switch K1 of the common power supply is disconnected, the first micro switch unit 100 can control the attraction coil of the first contactor KM1 to be powered on according to a received first power supply switching signal of the controller, and the main closing coil CC can control the primary loop switch K1 of the common power supply to be closed and control the primary loop switch K2 of the standby power supply to be disconnected after the attraction coil of the first contactor KM1 is powered on, so that the working position of the standby power supply is switched to the working position of the common power supply;
the main closing coil CC can also control the change of the second micro switch unit 200 after the attraction coil of the second contactor KM2 is powered on so as to feed back an indication signal indicating that a common power supply is converted into a standby power supply to the controller;
the main closing coil CC can also control the change of the second micro switch unit 200 after the pull-in coil of the first contactor KM1 is powered on so as to feed back an indication signal indicating that the standby power is converted into the common power to the controller.
It should be understood that the two-position automatic transfer switching device is usually controlled by an external controller to realize the action of switching, and the principle of the external controller to realize the control is to monitor the working states of two power supplies in real time, when the controller monitors that one power supply which normally supplies power to a load fails, and the other monitored power supply is in a normal state, the power supply needs to be transferred from the failed power supply to the normal power supply, so as to realize that the normal power supply is used as the power supply to continuously supply power to the load.
It should be noted that, the controller according to the embodiment of the present invention is a common controller for controlling an automatic transfer switching device, and is specifically known to those skilled in the art, and is not described herein again.
The embodiment of the utility model provides an in, normally be for power commonly used all the way for the load power supply, monitor power commonly used and break down as the controller, and stand-by power supply is in when normal condition, the controller can generate second power switching signal, first micro-gap switch unit among the control circuit can be according to this second power switching signal control the actuation coil of second contactor gets electric, and then makes main combined floodgate coil CC can control the disconnection of the primary loop switch of power commonly used, the primary loop switch of simultaneous control stand-by power supply is closed to realize power commonly used to stand-by power supply's switching.
When the standby power supply is monitored to have a fault and the common power supply is in a normal state, the controller can generate a first power supply switching signal, and a first micro switch unit in the control circuit can control the attraction coil of the first contactor to be electrified according to the first power supply switching signal, so that the main closing coil CC can control the primary loop switch of the standby power supply to be switched off, and meanwhile, the primary loop switch of the common power supply is controlled to be switched on, and the switching from the standby power supply to the common power supply is realized.
The embodiment of the utility model provides a control circuit for two station automatic transfer switch electrical apparatus, through the combined circuit of first contactor, second contactor, micro-gap switch unit and main combined floodgate coil, realize the reliable switching between power commonly used and the stand-by power supply, guaranteed the continuous reliable operation of load, and circuit structure is simple reliable, can not take place the malfunction, can accomplish the switching between the power supply system fast. Additionally, the embodiment of the utility model provides a this kind of control circuit only needs one set of main combined floodgate coil can accomplish the fast switch-over between the electrical power generating system, and is with low costs and simple structure.
As a specific embodiment of the first contactor KM1 and the second contactor KM2, as shown in fig. 1, one end of the first normally open point KM1-1 of the first contactor KM1 is connected to the first terminal 2 of the normal power supply of the controller, one end of the first normally open point KM2-1 of the second contactor KM2 is connected to the first terminal 4 of the standby power supply of the controller, the other end of the first normally open point KM1-1 of the first contactor KM1 and the other end of the first normally open point KM2-1 of the second contactor KM2 are connected to the first input end of the rectifier bridge Si, one end of the second normally open point KM1-2 of the first contactor KM1 is connected to the second terminal 1 of the normal power supply of the controller, one end of the second normally open point KM2-2 of the second contactor KM2 is connected to the second terminal 3 of the standby power supply of the controller, the other end of the second normally-open point KM1-2 of the first contactor KM1 and the other end of the second normally-open point KM2-2 of the second contactor KM2 are both connected with a second input end of the rectifier bridge Si.
It should be understood that, in the embodiment of the present invention, the first contactor KM1 is used as a closing contactor on the common power supply side, the second contactor KM2 is used as a closing contactor on the standby power supply side, and the main closing coil CC is used as a closing coil on the common power supply side and the standby power supply side.
Specifically, as shown in fig. 1, the first microswitch unit 100 comprises:
a first microswitch SS1 and a second microswitch SS2,
one end of a normally closed point of the first micro switch SS1 is connected with a first closing output terminal 8 of a common power supply of the controller, the other end of the normally closed point of the first micro switch SS1 is connected with one input end of an attraction coil of the first contactor KM1, and the other input end of the attraction coil of the first contactor KM1 is connected with a second closing output terminal 7 of the common power supply of the controller;
one end of a normally closed point of the second micro switch SS2 is connected with a first switch-on output terminal 10 of the standby power supply of the controller, the other end of the normally closed point of the second micro switch SS2 is connected with one input end of a pull-in coil of the second contactor KM2, and the other input end of the pull-in coil of the second contactor KM2 is connected with a second switch-on output terminal 9 of the standby power supply of the controller.
In order to feed back to the controller whether the switching between the normal power supply and the standby power supply is achieved, the second micro switch unit 200 includes:
a first set of microswitches 210 and a second set of microswitches 220,
the first group of micro switches 210 and the second group of micro switches 220 are both connected with the state input terminal of the controller, the first group of micro switches 210 are linked with the primary loop switch K1 of the common power supply, the second group of micro switches 220 are linked with the primary loop switch K2 of the standby power supply,
when the primary loop switch K1 of the normal power supply is switched from closed to open and the primary loop switch K2 of the standby power supply is switched from open to closed, the first set of micro switches 210 is switched from closed to open and the second set of micro switches 220 is switched from open to closed;
when the primary loop switch K1 of the main power supply is switched from open to closed and the primary loop switch K2 of the backup power supply is switched from closed to open, the first set of micro switches 210 is switched from open to closed and the second set of micro switches 220 is switched from closed to open.
Further specifically, the first set of micro-switches 210 comprises: the controller comprises a third microswitch SS3 and a fourth microswitch SS4, wherein both ends of a normally open point of the third microswitch SS3 and both ends of a normally open point of the fourth microswitch SS4 are connected with state input terminals of the controller.
As shown in fig. 1, the normally open point of the third microswitch SS3 is connected to the first state input terminal 11 and the second state input terminal 12 of the controller, respectively, and the normally open point of the fourth microswitch SS4 is connected to the third state input terminal 13 and the fourth state input terminal 14 of the controller, respectively.
Preferably, the third and fourth microswitches SS3 and SS4 each comprise a single pole double throw switch.
It should be understood that the third microswitch SS3 and the fourth microswitch SS4 are both in linkage with the primary circuit switch K1 of the utility power source, i.e., when the primary circuit switch K1 of the utility power source is closed, the third microswitch SS3 and the fourth microswitch SS4 are both closed, and when the primary circuit switch K1 of the utility power source is open, the third microswitch SS3 and the fourth microswitch SS4 are both open.
Further specifically, the second set of micro-switches 220 comprises: a fifth micro switch SS5 and a sixth micro switch SS6, wherein both ends of a normally open point of the fifth micro switch SS5 and both ends of a normally open point of the sixth micro switch SS6 are connected with state input terminals of the controller.
As shown in fig. 1, the fifth microswitch SS5 is connected to the fifth state input terminal 15 and the sixth state input terminal 16 of the controller at two ends of the normally open point, and the sixth microswitch SS6 is connected to the seventh state input terminal 17 and the eighth state input terminal 18 of the controller at two ends of the normally open point.
Preferably, the fifth and sixth microswitches SS5 and SS6 each comprise a single pole double throw switch.
It should be understood that the fifth and sixth microswitches SS5 and SS6 are both linked with the primary circuit switch K2 of the backup power source, i.e., when the primary circuit switch K2 of the backup power source is closed, the fifth and sixth microswitches SS5 and SS6 are both closed, and when the primary circuit switch K2 of the backup power source is open, the fifth and sixth microswitches SS5 and SS6 are both open.
The specific operation principle of the control circuit for a two-position automatic transfer switching device according to the embodiment of the present invention is described in detail with reference to fig. 1.
The two-station automatic transfer switching device has two working positions: working positions of a common power supply and a standby power supply; in the normal power supply operating position, the primary circuit switch K1 of the normal power supply in fig. 1 is turned on, and the primary circuit switch K2 of the backup power supply is turned off, so that the load is supplied with power from the normal power supply. In the standby power supply operating position, the primary circuit switch K1 of the regular power supply in fig. 1 is off and the primary circuit switch K2 of the standby power supply is on, and the load is supplied by the standby power supply.
The control circuit of fig. 1 is a two-position automatic transfer switching device in a working position of a common power supply.
1) When the working position of the common power supply is converted into the working position of the standby power supply:
the standby power supply is normal, the normal working voltage is applied to the first connection terminal 4 and the first connection terminal 3 of the standby power supply, and one end of the first normally-on point KM2-1 and one end of the second normally-on point KM2-2 of the second contactor KM2 are powered. At this time, a first closing output terminal 10 of the standby power supply and a second closing output terminal 9 of the standby power supply output normal voltage signals, a pull-in coil of the second contactor KM2 is powered on, a first normally-open point KM2-1 and a second normally-open point KM2-2 of the second contactor KM2 are closed, a main closing coil CC is powered on, an electromagnetic system acts, a primary loop switch K2 of the standby power supply is closed, the second micro switch SS2, the third micro switch SS3 and the fourth micro switch SS4 are all opened, and the first micro switch SS1, the fifth micro switch SS5 and the sixth micro switch SS6 are all closed. The second microswitch SS2 is opened, so that the pull-in coil of the second contactor KM2 is powered off, then the main closing coil CC is powered off, and the main closing coil CC is prevented from being overheated, burnt and broken down due to long-time power-on.
When the standby power supply fails (overvoltage, undervoltage and shortage are equal), the controller monitors the common power supply, and if the common power supply is in a failure state, the controller outputs an alarm signal and does not send any action instruction. If the common power supply is in a normal state, the controller can send an action command to enable the automatic transfer switching device to be transferred to the common power supply.
2) The working position of the standby power supply is converted into the working position of the common power supply
The normal power supply is normal, the normal working voltage is applied to the first connection terminal 2 and the second connection terminal 1 of the normal power supply, and one end of the first normally-open point KM1-1 and one end of the second normally-open point KM1-2 of the first contactor KM1 are electrified. At this time, the first closing output terminal 8 of the common power supply and the second closing output terminal 7 of the common power supply output normal voltage signals, because the first microswitch SS1 is in a closed state at this time, the pull-in coil of the first contactor KM1 is powered on, the first normally-open point KM1-1 and the second normally-open point KM1-2 of the first contactor KM1 are closed, the main closing coil CC is powered on, the electromagnetic system acts, the primary loop switch K1 of the common power supply is closed, the second microswitch SS2, the third microswitch SS3 and the fourth microswitch SS4 are both closed, and the first microswitch SS1, the fifth microswitch SS5 and the sixth microswitch SS6 are all opened. As the first microswitch SS1 is opened, the pull-in coil of the first contactor KM1 is powered off, and then the main closing coil CC is powered off, so that overheating burning and breakdown of the main closing coil CC due to long-time electrification are avoided.
The process completes the process that the power supply is converted from the common power supply to the standby power supply, and the standby power supply is converted to the common power supply.
To sum up, the embodiment of the utility model provides a control circuit for two station automatic transfer switch electrical apparatus only accomplishes the power switching between two way power of a two station automatic transfer switch electrical apparatus by one set of electromagnetic system, has reduced the volume of switch body, has reduced the switching cost, has promoted the benefit. The switch is controlled to switch through two groups of contact electric interlocking, and the action speed is high and reliable. In addition, the control circuit can ensure that the automatic change-over switch electrical appliance device does not generate misoperation under the real-time monitoring of the controller, and accurately completes the change-over between two power supplies.
It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims (8)

1. A control circuit for a two-position automatic transfer switching apparatus, comprising:
the intelligent controller comprises a first contactor, a second contactor, a main closing coil, a rectifier bridge, a first micro switch unit and a second micro switch unit, wherein one end of the first contactor is connected with a common power supply wiring terminal of the controller, one end of the second contactor is connected with a standby power supply wiring terminal of the controller, the other end of the first contactor and the other end of the second contactor are respectively connected with two input ends of the rectifier bridge, two output ends of the rectifier bridge are respectively connected with two ends of the main closing coil, the first micro switch unit and the second micro switch unit are both connected with the main closing coil, the main closing coil is also respectively connected with a primary loop switch of a common power supply and a primary loop switch of a standby power supply,
when the primary loop switch of the common power supply is closed and the primary loop switch of the standby power supply is disconnected, the first micro switch unit can control the attraction coil of the second contactor to be electrified according to a received second power supply conversion signal of the controller, and the main closing coil can control the primary loop switch of the standby power supply to be closed and control the primary loop switch of the common power supply to be disconnected after the attraction coil of the second contactor is electrified so as to realize the switching from the working position of the common power supply to the working position of the standby power supply;
when a primary loop switch of the standby power supply is closed and a primary loop switch of the common power supply is disconnected, the first micro switch unit can control an attraction coil of the first contactor to be electrified according to a received first power supply conversion signal of the controller, and the main closing coil can control the primary loop switch of the common power supply to be closed and control the primary loop switch of the standby power supply to be disconnected after the attraction coil of the first contactor is electrified so as to realize the switching of the working position of the standby power supply to the working position of the common power supply;
the main closing coil can also control the change of the second micro switch unit after the suction coil of the second contactor is electrified so as to feed back an indication signal of converting a common power supply into a standby power supply to the controller;
the main closing coil can also control the change of the second micro switch unit after the suction coil of the first contactor is electrified so as to feed back an indication signal of converting the standby power supply into a common power supply to the controller.
2. The control circuit for a two-position automatic transfer switching apparatus according to claim 1, it is characterized in that one end of a first normally-open point of the first contactor is connected with a first wiring terminal of a normally-used power supply of the controller, one end of a first normally-open point of the second contactor is connected with a first connecting terminal of a standby power supply of the controller, the other end of the first normally-on point of the first contactor and the other end of the first normally-on point of the second contactor are both connected with a first input end of the rectifier bridge, one end of the second normally-open point of the first contactor is connected with a second connecting terminal of a common power supply of the controller, one end of a second normally-open point of the second contactor is connected with a second connecting terminal of the standby power supply of the controller, the other end of the second normally-on point of the first contactor and the other end of the second normally-on point of the second contactor are both connected with the second input end of the rectifier bridge.
3. The control circuit for a two-position automatic transfer switching apparatus according to claim 1, wherein the first micro switch unit comprises:
a first microswitch and a second microswitch,
one end of a normally closed point of the first micro switch is connected with a first switch-on output terminal of a common power supply of the controller, the other end of the normally closed point of the first micro switch is connected with one input end of an attraction coil of the first contactor, and the other input end of the attraction coil of the first contactor is connected with a second switch-on output terminal of the common power supply of the controller;
the normally closed point one end of the second micro switch is connected with a first switch-on output terminal of a standby power supply of the controller, the normally closed point other end of the second micro switch is connected with an input end of an attraction coil of the second contactor, and another input end of the attraction coil of the second contactor is connected with a second switch-on output terminal of the standby power supply of the controller.
4. The control circuit for a two-position automatic transfer switching apparatus according to claim 1, wherein the second micro switch unit comprises:
a first set of micro-switches and a second set of micro-switches,
the first group of micro switches and the second group of micro switches are connected with the state input terminal of the controller, the first group of micro switches are linked with the primary loop switch of the common power supply, the second group of micro switches are linked with the primary loop switch of the standby power supply,
when the primary loop switch of the common power supply is switched from on to off and the primary loop switch of the standby power supply is switched from off to on, the first group of micro switches is switched from on to off and the second group of micro switches is switched from off to on;
when the primary loop switch of the common power supply is switched from open to closed and the primary loop switch of the standby power supply is switched from closed to open, the first group of micro switches is switched from open to closed and the second group of micro switches is switched from closed to open.
5. The control circuit for a two-position automatic transfer switching apparatus of claim 4, wherein said first set of microswitches comprises: the controller comprises a third microswitch and a fourth microswitch, wherein both ends of a normally open point of the third microswitch and both ends of a normally open point of the fourth microswitch are connected with the state input terminal of the controller.
6. The control circuit for a two-position automatic transfer switching apparatus of claim 5, wherein said third and fourth microswitches each comprise a single pole double throw switch.
7. The control circuit for a two-position automatic transfer switching apparatus of claim 4, wherein said second set of microswitches comprises: the controller comprises a fifth micro switch and a sixth micro switch, and both ends of a normally open point of the fifth micro switch and both ends of a normally open point of the sixth micro switch are connected with the state input terminals of the controller.
8. The control circuit for a two-position automatic transfer switching apparatus of claim 7, wherein said fifth and sixth microswitches each comprise a single pole double throw switch.
CN202121498929.3U 2021-07-02 2021-07-02 Control circuit for two-station automatic transfer switching device Active CN215009751U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121498929.3U CN215009751U (en) 2021-07-02 2021-07-02 Control circuit for two-station automatic transfer switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121498929.3U CN215009751U (en) 2021-07-02 2021-07-02 Control circuit for two-station automatic transfer switching device

Publications (1)

Publication Number Publication Date
CN215009751U true CN215009751U (en) 2021-12-03

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Application Number Title Priority Date Filing Date
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