Automatic conversion device for multi-loop power supply

Abstract

The utility model discloses an automatic conversion device for a multi-loop power supply, and relates to the technical field of electronics, in particular to the automatic conversion device for the multi-loop power supply, which comprises a three-phase input end and a load output end, the three-phase input end comprises a first phase line end, a second phase line end and a third phase line end; the load output end comprises a neutral line end and a load phase line end; the first phase line end is independently connected with the neutral line end and the load phase line end through a first change-over switch and a first relay coil respectively; the second phase line end is connected with the neutral line end through a second relay coil, and meanwhile, the second phase line end is independently connected with the load phase line end through a second change-over switch and a third change-over switch in sequence; the third phase line end is connected with the load phase line end through a fourth change-over switch and a fifth change-over switch in sequence; when any phase of the three-phase input end breaks down, the device can carry out line conversion in time, power is normally supplied to the load output end, the continuity of power supply can be guaranteed, and the reliability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic technical field especially, it is a kind of for multi-loop power automatic transfer device. BACKGROUND

[0002] In the past for data center, school, hospital, military, municipal traffic, water conservancy and hydropower, wind energy, nuclear energy, solar energy, oil field and other power supply devices, when one power supply fails or two power supplies fail, without additional power supply, it will lead to system paralysis, make production, emergency rescue equipment, personal safety and property suffer serious losses. INVENTION CONTENTS

[0003] The utility model aims at avoiding the deficiency in prior art and provides a kind of technology that can automatically switch loop to guarantee equipment normal operation.

[0004] The utility model aims at avoiding the deficiency in prior art and provides a kind of technology that can automatically switch loop to guarantee equipment normal operation.

[0005] A kind of for multi-loop power automatic transfer device, comprising: three-phase input end and load output end;Three-phase input end includes first phase line end, second phase line end and third phase line end;Load output end includes neutral line end and load phase line end;First phase line end is separately connected with neutral line end and load phase line end by first switching switch and first relay coil respectively;Second phase line end is connected with neutral line end by second relay coil, simultaneously, second phase line end is separately connected with load phase line end by second switching switch and third switching switch in turn;Third phase line end is connected with load phase line end by fourth switching switch and fifth switching switch in turn.

[0006] Specifically, first relay coil is coupled with first switching switch, second switching switch and fourth switching switch respectively;Second relay coil is coupled with third switching switch and fifth switching switch respectively.

[0007] More specifically, first switching switch and third switching switch are normally open switches;Second switching switch, fourth switching switch and fifth switching switch are normally closed switches.

[0008] More specifically, normally open switch is normally open contact switch;Normally closed switch is normally closed contact switch.

[0009] More specifically, third switching switch is provided with two, and is connected in series in turn.

[0010] More specifically, fifth switching switch is provided with two, and is connected in series in turn.

[0011] The above, three-phase input end is further connected with current protection device.

[0012] Specifically, the current protection device includes several fuses; the first phase line end, the second phase line end and the third phase line end are respectively connected with corresponding fuses.

[0013] More specifically, the current protection device includes several thermal cutouts; the first phase line end, the second phase line end and the third phase line end are respectively connected with corresponding thermal cutouts.

[0014] The utility model discloses reached beneficial effect: a kind of for multiple circuit power automatic transfer device, comprising: three-phase input and load output;Three-phase input includes first phase line end, second phase line end and third phase line end;Load output includes neutral line end and load phase line end;First phase line end is separately connected with neutral line end and load phase line end by first switching switch and first relay coil;Second phase line end is connected with neutral line end by second relay coil, simultaneously, second phase line end is separately connected with load phase line end by second switching switch and third switching switch in turn;Third phase line end is connected with load phase line end by fourth switching switch and fifth switching switch in turn;When the failure of any one phase of three-phase input occurs, the device can line conversion in time, for load output normal power supply, can guarantee the continuity of power supply, and reliability is high. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be to the embodiment description needed to use a simple introduction to the drawings, obviously, the following description in the drawings is some embodiments of the utility model, for those skilled in the art, without creative labor, according to these drawings, other drawings can also be obtained.

[0016] Figure 1 It is a circuit principle schematic view for multiple circuit power automatic transfer device of the embodiment of the utility model. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantage of the utility model more clear, the following will refer to the drawings in the embodiment of the utility model, by implementation clear, complete technical scheme of the utility model is described, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the utility model protection.

[0018] Embodiment 1

[0019] One of the implementation methods of the utility model for multiple circuit power automatic transfer device is as shown in Figure 1 It includes: three-phase input, load output, several relay tickets and several switching switches.

[0020] The three-phase input end includes a first phase line end A, a second phase line end B, and a third phase line end C, which are used to connect an external three-phase power supply; the load output end includes a neutral line end N and a load phase line end L.

[0021] The first phase line end A is individually connected with the neutral line end N and the load phase line end L through a first switching switch Q11 and a first relay coil KM1 respectively.

[0022] The second phase line end B is connected with the neutral line end N through a second relay coil KM2, and at the same time, the second phase line end B is individually connected with the load phase line end L through a second switching switch and a third switching switch in sequence.

[0023] The third phase line end C is connected with the load phase line end L through a fourth switching switch Q23 and a fifth switching switch in sequence.

[0024] The first relay coil KM1 is coupled with the first switching switch Q11, the second switching switch, and the fourth switching switch Q23 respectively, and is used to control the working state of the corresponding switches.

[0025] The second relay coil KM2 is coupled with the third switching switch and the fifth switching switch respectively, and is used to control the working state of the corresponding switches.

[0026] In the embodiment, the first switching switch Q11 and the third switching switch are normally open switches; the second switching switch, the fourth switching switch Q23, and the fifth switching switch are normally closed switches; and each normally open switch is a normally open contact switch, and each normally closed switch is a normally closed contact switch.

[0027] In the embodiment, the second switching switch is provided with two, including switching switches Q21 and Q22, and is connected in sequence; the third switching switch is provided with two, including switching switches Q12 and Q13, and is connected in sequence; and the fifth switching switch is provided with two, including switching switches Q24 and Q25, and is connected in sequence.

[0028] Further, in the embodiment, the three-phase input end is further connected with a current protection device.

[0029] In some embodiments, the current protection device includes a plurality of fuses (FU);

[0030] The first phase line end A, the second phase line end B, and the third phase line end C are respectively connected with corresponding fuses.

[0031] In other embodiments, the current protection device includes a plurality of thermal cut-off switches;

[0032] The first phase line end A, the second phase line end B, and the third phase line end C are respectively connected with corresponding thermal cut-off switches.

[0033] The specific working principle is as follows:

[0034] When power is supplied from the first phase terminal A, it passes through the protection device FU1 and supplies power to the first relay coil KM1, completing a circuit through the neutral terminal N. This circuit generates a magnetic field that drives the armature within the first relay coil KM1, simultaneously opening the normally closed second switches Q21, Q22, and fourth switch Q23 (at this point, the second phase terminal B and the third phase terminal C are disconnected from the load phase terminal L). This closes the normally open first switch Q11. At this point, the first phase terminal A is electrically connected to the neutral terminal N and the load phase terminal L, respectively, providing power to the load phase terminal L.

[0035] When power is supplied from the second phase terminal B, it passes through the protection device FU2 and supplies power to the second relay coil KM2, completing a circuit through the neutral terminal N. This circuit generates a magnetic field that drives the armature within the second relay coil KM2, simultaneously opening the normally closed fifth switches Q24 and Q25 (at this point, the third phase terminal C is disconnected from the load phase terminal L) and closing the normally open third switches Q12 and Q13. At this point, the second phase terminal B is electrically connected to the neutral terminal N and the load phase terminal L, respectively, providing power to the load phase terminal L.

[0036] When the third phase terminal C is powered, the third phase terminal C is connected to the load phase terminal L through the protection device FU3, the normally closed fourth switch Q23 and the fifth switches Q24 and Q25, and can supply power to the load phase terminal L.

[0037] That is, when the first phase line terminal A loses power, the second phase line terminal B supplies power to the load phase line terminal L; when the second phase line terminal B loses power, the first phase line terminal A supplies power to the load phase line terminal L; when both the first phase line terminal A and the second phase line terminal B lose power, the third phase line terminal C can supply power to the load phase line terminal L.

[0038] When the load is overcurrent or short-circuited, any one of the protection devices FU1, FU2 or FU3 will be activated to disconnect the first phase line A, the second phase line B or the third phase line C. At this time, any one of the power supplies of the first phase line A, the second phase line B or the third phase line C will be converted to supply the N and L loads.

[0039] It should be noted that the above only the preferred embodiments of the present application and the use of technical principles. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, those skilled in the art can make various obvious changes, re-adjustment and replacement without departing from the scope of the present application. Therefore, although the above embodiments of the present application has been described in more detail, but the present application is not limited to the above examples, without departing from the concept of the present application, but also can include more other equivalent embodiments, and the scope of the present application is determined by the appended claims.

Claims

1. A multi-circuit power automatic transfer device, characterized by comprising: Comprising: a three-phase input end and a load output end; the three-phase input end comprises a first phase line end, a second phase line end and a third phase line end; the load output end comprises a neutral line end and a load phase line end; the first phase line end is individually connected with the neutral line end and the load phase line end through a first switching switch and a first relay coil respectively; the second phase line end is connected with the neutral line end through a second relay coil, and at the same time, the second phase line end is individually connected with the load phase line end through a second switching switch and a third switching switch in turn; the third phase line end is connected with the load phase line end through a fourth switching switch and a fifth switching switch in turn.

2. The automatic transfer switch for multi-loop power supply according to claim 1, characterized in that: the first relay coil is coupled with the first switching switch, the second switching switch and the fourth switching switch respectively; the second relay coil is coupled with the third switching switch and the fifth switching switch respectively.

3. The automatic transfer switch for multi-loop power supply according to claim 2, characterized in that: the first switching switch and the third switching switch are normally open switches; the second switching switch, the fourth switching switch and the fifth switching switch are normally closed switches.

4. The automatic transfer switch for multi-loop power supply according to claim 3, characterized in that: the normally open switch is a normally open contact switch; the normally closed switch is a normally closed contact switch.

5. The automatic transfer switch for multi-loop power supply according to claim 4, characterized in that: the third switching switch is provided with two and connected in series in turn.

6. The automatic transfer switch for multi-loop power supply according to claim 4, characterized in that: the fifth switching switch is provided with two and connected in series in turn.

7. The automatic transfer switch for multi-loop power supply according to any one of claims 1 to 6, characterized in that: the three-phase input end is further connected with a current protection device.

8. The automatic transfer switch for multi-loop power supply according to claim 7, characterized in that: the current protection device comprises a plurality of fuses; the first phase line end, the second phase line end and the third phase line end are respectively connected with corresponding fuses.

9. The automatic transfer switch for multi-loop power supply according to claim 7, characterized in that: the current protection device comprises a plurality of thermal cut-off devices; the first phase line end, the second phase line end and the third phase line end are respectively connected with corresponding thermal cut-off devices.

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