CN217445078U - Simple low-voltage dual-power switching device - Google Patents
Simple low-voltage dual-power switching device Download PDFInfo
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- CN217445078U CN217445078U CN202221160693.7U CN202221160693U CN217445078U CN 217445078 U CN217445078 U CN 217445078U CN 202221160693 U CN202221160693 U CN 202221160693U CN 217445078 U CN217445078 U CN 217445078U
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Abstract
The utility model belongs to the electrical technology field, and relates to a simple low-voltage dual power supply switching device, which comprises a main loop, a first control loop, a second control loop, a normal power supply and a standby power supply; the main loop includes level four contactor, first miniature circuit breaker and the miniature circuit breaker of second, level four contactor includes normally open contact and normally closed contact, normally open contact and first control circuit connect, normally closed contact and second control circuit connect, normal power is connected to normally open contact through first miniature circuit breaker, stand-by power supply is connected to normally closed contact through the miniature circuit breaker of second. The simple dual-power switching device can effectively and economically solve the problem of power supply reliability, and avoids the condition that one path of power supply circuit is broken down or fails to cause the power failure of the whole power supply circuit.
Description
Technical Field
The utility model relates to the field of electrical technology, especially, relate to simple and easy low pressure dual power switching device.
Background
The dual-power switching device is mainly applied to a power supply loop of an important load and plays an important role in a power distribution loop. At present, a power supply switching device is mainly an integrated double-power-supply switching device, is relatively expensive, has low cost performance when used under the condition of few important load loops, and can only depend on professionals for later maintenance or repair or replace a new double-power-supply switching device, thereby bringing inconvenience for production.
The double-power-supply switching device mainly comprises a switch body and a controller. The switch body mainly controls the on-off of a main loop to supply power to the outside, the controller is mainly responsible for detecting the voltage and other data of a power supply inlet wire to control, the control mode and the internal circuit are complex, outlet faults can only be replaced by new equipment or returned to a factory for maintenance, inconvenience is brought to continuous production, the device is high in price, and the device is low in cost performance when used under the conditions of low investment and important load.
SUMMERY OF THE UTILITY MODEL
In order to solve the not enough of prior art, the utility model provides a simple and easy low pressure dual power supply switching device can be effective, economic solution power supply reliability problem to having avoided wherein the paralysed or the trouble of power supply circuit of the same kind leads to the condition of whole power supply circuit outage, this device is at the power switching in-process, because of the existence of battery makes the switching process do not have intermittent type operation, has avoided shaking the existence of electricity, has improved the reliability and the economic nature of power supply.
The utility model adopts the following technical scheme:
a simple low-voltage dual-power switching device comprises a main loop, a first control loop, a second control loop, a normal power supply and a standby power supply;
the main loop includes level four contactor, first miniature circuit breaker and the miniature circuit breaker of second, level four contactor includes normally open contact and normally closed contact, normally open contact and first control circuit connect, normally closed contact and second control circuit connect, normal power is connected to normally open contact through first miniature circuit breaker, stand-by power supply is connected to normally closed contact through the miniature circuit breaker of second.
In a further technical definition, one end of the internal battery is connected with the four-stage contactor, and the other end of the internal battery is connected with the power supply circuit.
In a further aspect, the normally open contact includes a first contact and a second contact, and the normally closed contact includes a third contact and a fourth contact, the first contact and the third contact being coupled to a first pin of the internal battery, and the second contact and the fourth contact being coupled to a second pin of the internal battery.
Further technically defined, the other end of the internal battery is connected to both ends of the power supply circuit through a third micro breaker.
In a further aspect, the normally open contact is connected to a first two-stage contactor and the normally closed contact is connected to a second two-stage contactor.
In a further aspect, the first two-stage contactor includes a fifth contact and a sixth contact, the first contact and the fifth contact being connected to the first terminal;
the second two-stage contactor includes seventh and eighth contacts connected to the second terminal, the second, sixth, eighth and fourth contacts being commonly connected to the third terminal.
Further technically defined, two ends of the first control loop are connected to the first terminal and the third terminal, and two ends of the second control loop are connected to the second terminal and the third terminal.
Further technical definition, the first control loop comprises a four-stage contactor control coil, a two-stage contactor control coil, a control coil of an intermediate relay and a first indicator lamp, and the four-stage contactor control coil, the two-stage contactor control coil, the control coil of the first intermediate relay and the first indicator lamp are connected in parallel.
The two ends of the second control loop are connected to the second terminal and the third terminal, the second control loop comprises a two-stage contactor control coil, a second intermediate relay control coil and a second indicator light, and the two-stage contactor control coil, the second intermediate relay control coil and the second indicator light are connected in parallel.
Further technically, the normal power supply and the standby power supply are both 220V.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a pass through the switching-on and switching-off of level four contactor and two-stage contactor and realize the switching of dual supply, for solving and have the condition that power supply circuit resumes the power supply again after cutting off the power supply in the twinkling of an eye at contactor switching-on in-process, introduce level four contactor and battery, provide reliable power for power supply circuit by the battery in the twinkling of an eye at the power off, realize the uninterrupted power supply.
2. The utility model discloses a switching of control contactor is inhaled and is set up the interlocking contact in control circuit, and the effectual problem of having solved dual power supply switching has simplified dual power supply switching device on the market, provides convenience for later maintenance, simultaneously greatly reduced the input of cost.
Drawings
The accompanying drawings, which form a part of the specification, 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 invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic diagram of a main circuit structure of a simple low-voltage dual power switching device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a first control loop of the simple low-voltage dual power switching device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a second control loop of the simple low-voltage dual power switching device according to an embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Referring to fig. 1-3, the present invention provides an embodiment:
a simple low-voltage dual-power switching device comprises a main loop, a first control loop, a second control loop, a normal power supply and a standby power supply;
the main circuit comprises a four-stage contactor KM1, a first micro breaker QF1, a second micro breaker QF2, a first two-stage contactor KM2, a second two-stage contactor KM3 and a third micro breaker QF 3;
the four-stage contactor KM1 comprises a normally open contact NO and a normally closed contact NC, the normally open contact NO is connected with a first control circuit, and the normally closed contact NC is connected with a second control circuit; the normal power supply is connected to the normally open contact NO through a first miniature circuit breaker QF1, and the standby power supply is connected to the normally closed contact NC through a second miniature circuit breaker QF 2.
In one or more embodiments, the input voltage and the output voltage of the normal power supply and the standby power supply are 220V.
As one or more embodiments, the main loop further comprises an internal battery, one end of the internal battery is connected with the four-stage contactor KM1, and the other end of the internal battery is connected with a power supply circuit;
one end of the internal battery is connected with the four-stage contactor KM1, and the connection is specifically as follows: the normally open contact NO comprises a first contact NO1 and a second contact NO2, the normally closed contact NC comprises a third contact NC1 and a fourth contact NC2, the first contact NO1 and the third contact NC1 are connected to a first pin BA1 of the internal battery, and the second contact NO2 and the fourth contact NC2 are connected to a second pin BA2 of the internal battery;
the other end of the internal battery is connected to two ends of the power supply circuit through a third micro breaker QF 3.
As one or more examples, the normally open contact NO is connected to the first two-stage contactor KM2, the first two-stage contactor KM2 includes a fifth contact KM2-1 and a sixth contact KM2-2, and the first contact NO1 and the fifth contact are connected to the first terminal 1a 1;
the normally closed contact NC is connected with a second two-stage contactor KM3, the second two-stage contactor KM3 comprises a seventh contact KM3-1 and an eighth contact KM3-2, the seventh contact KM3-1 and the eighth contact KM3-2 are connected to a second terminal 2A1, and the second contact NO2, the sixth contact KM2-2, the eighth contact and the fourth contact are connected to a third terminal N in a common way;
as shown in fig. 2, as one or more embodiments, two ends of the first control loop are connected to the first terminal 1a1 and the third terminal N, the first control loop includes a four-stage contactor KM1 control coil, a two-stage contactor KM2 control coil, a control coil of the intermediate relay KA1, and a first indicator light HW1, the four-stage contactor KM1 control coil, the two-stage contactor KM2 control coil, the control coil KA1-1 of the first intermediate relay KA1, and the first indicator light HW1 are connected in parallel, and a parallel circuit is connected in series with a second intermediate relay KA 2;
as shown in fig. 3, as one or more embodiments, two ends of the second control loop are connected to the second terminal 2a1 and the third terminal N, the second control loop comprises a two-stage contactor KM3 control coil, a second intermediate relay KA2-1 control coil and a second indicator light HW2, the two-stage contactor KM3 control coil, the second intermediate relay KA2 control coil KA2-1 and the second indicator light HW2 are connected in parallel, and the parallel circuit is connected in series with the first intermediate relay KA 1.
The specific working principle is as follows:
the first micro breaker QF1 and the second micro breaker QF2 manually control the power supply of a normal power supply and a standby power supply, under the condition of normal operation, the first micro breaker QF1 and the second micro breaker QF2 are in a closed state, and a coil of the four-stage contactor KM1 can select a pull-in state according to the normal power supply and the standby power supply, so that the normal power supply or the standby power supply is selected to supply power to a power supply loop;
when the normal power supply has no fault, the normally open contact of the four-stage contactor KM1 is attracted, the two-stage contactor KM2 is attracted, the third micro breaker QF3 is manually closed, the internal battery starts to work, and thus the normal power supply and the internal power supply simultaneously supply power for the power supply loop.
In the case of normal power supply, the first indicator light HW1 is lit to indicate the normal power supply operating state. When a normal power supply works, the coil of the first intermediate relay KA1 is electrified, and the normally closed contact disconnects the control loop of the standby power supply to play a role in interlocking.
When the normal power supply fails, the control loop is powered off, so that the four-stage contactor KM1 is powered off, and the contacts are normally closed and automatically switched to the standby power supply to supply power to the power supply loop.
The second intermediate relay KA2, the coil of the two-stage contactor KM3 and the second indicator lamp HW2 in the control loop are powered by the standby power supply, and the standby power supply supplies power to the power supply loop. Meanwhile, after the second intermediate relay KA2 is electrified, the normally closed contact breaks a control loop of a normal power supply to play a role in interlocking.
In order to solve the risk of power failure at the moment of switching the contactors, namely the risk that the first two-stage contactor KM2 is disconnected and the second two-stage contactor KM3 is not closed for power failure, an internal battery is introduced, the internal battery is always used as a supplementary power supply to supply power for a circuit in the working process of a standby power supply and a normal power supply, the internal battery is used for supplying power for an external circuit at the moment of switching, and the capacity of the internal battery can be properly selected according to the load of the external circuit due to short time of the switching process.
This use neotype simple and easy dual power switching device can effectual solution dual power switching device maintenance, maintain complicacy and the higher problem of price relatively to for providing more selectivity under the limited condition of input cost.
Finally, it should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that the technical solutions described in the foregoing embodiments can be modified or some technical features can be replaced equally, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A simple low-voltage dual-power switching device is characterized by comprising a main loop, a first control loop, a second control loop, a normal power supply and a standby power supply;
the main loop includes level four contactor, first miniature circuit breaker and the miniature circuit breaker of second, level four contactor includes normally open contact and normally closed contact, normally open contact and first control circuit connect, normally closed contact and second control circuit connect, normal power is connected to normally open contact through first miniature circuit breaker, stand-by power supply is connected to normally closed contact through the miniature circuit breaker of second.
2. The simple low-voltage dual-power switching device as claimed in claim 1, wherein the main circuit further comprises an internal battery, one end of the internal battery is connected to the four-stage contactor, and the other end of the internal battery is connected to the power supply circuit.
3. The simple low-voltage dual-power switching device as claimed in claim 2, wherein the normally open contact comprises a first contact and a second contact, the normally closed contact comprises a third contact and a fourth contact, the first contact and the third contact are connected to a first pin of the internal battery, and the second contact and the fourth contact are connected to a second pin of the internal battery.
4. The simple low-voltage dual-power switching device as claimed in claim 2, wherein the other end of the internal battery is connected to two ends of the power supply circuit through a third micro breaker.
5. The simple low-voltage dual-power switching device as claimed in claim 3, wherein the normally open contact is connected with a first two-stage contactor, and the normally closed contact is connected with a second two-stage contactor.
6. The simple low-voltage dual-power switching device as claimed in claim 5, wherein the first two-stage contactor comprises a fifth contact and a sixth contact, and the first contact and the fifth contact are connected to the first terminal;
the second two-stage contactor includes seventh and eighth contacts connected to the second terminal, the second, sixth, eighth, and fourth contacts being commonly connected to the third terminal.
7. The simple low-voltage dual-power switching device as claimed in claim 6, wherein two ends of the first control loop are connected to the first terminal and the third terminal, and two ends of the second control loop are connected to the second terminal and the third terminal.
8. The simple low-voltage dual-power switching device of claim 7, wherein the first control loop comprises a four-stage contactor control coil, a two-stage contactor control coil, a control coil of an intermediate relay and a first indicator lamp, and the four-stage contactor control coil, the two-stage contactor control coil, the control coil of the first intermediate relay and the first indicator lamp are connected in parallel.
9. The simple low-voltage dual-power switching device as claimed in claim 7, wherein two ends of the second control loop are connected to the second terminal and the third terminal, the second control loop comprises a two-stage contactor control coil, a second intermediate relay control coil and a second indicator light, and the two-stage contactor control coil, the second intermediate relay control coil and the second indicator light are connected in parallel.
10. The simple low-voltage dual-power switching device of claim 1, wherein the normal power supply and the standby power supply are 220V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221160693.7U CN217445078U (en) | 2022-05-13 | 2022-05-13 | Simple low-voltage dual-power switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221160693.7U CN217445078U (en) | 2022-05-13 | 2022-05-13 | Simple low-voltage dual-power switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217445078U true CN217445078U (en) | 2022-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221160693.7U Active CN217445078U (en) | 2022-05-13 | 2022-05-13 | Simple low-voltage dual-power switching device |
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| Country | Link |
|---|---|
| CN (1) | CN217445078U (en) |
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- 2022-05-13 CN CN202221160693.7U patent/CN217445078U/en active Active
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