CN202906565U - Three-phase/single-phase compatible power switching circuit - Google Patents
Three-phase/single-phase compatible power switching circuit Download PDFInfo
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- CN202906565U CN202906565U CN 201220490050 CN201220490050U CN202906565U CN 202906565 U CN202906565 U CN 202906565U CN 201220490050 CN201220490050 CN 201220490050 CN 201220490050 U CN201220490050 U CN 201220490050U CN 202906565 U CN202906565 U CN 202906565U
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Abstract
The utility model provides a three-phase/single-phase compatible power switching circuit comprising a three-phase power accessing terminal, a neutral line accessing terminal and a ground line accessing terminal, and the circuit is characterized in that the circuit also comprises a first intermediate relay, a second intermediate relay, a third intermediate relay and a control unit, wherein a first phase line is connected with a second phase line through the first intermediate relay, the second phase line is connected with a third phase line through the second intermediate relay, and the third phase line is connected with the neutral line through the third intermediate relay; the control unit is used for testing input power types: if input power is three-phase AC power, the control unit controls the first, the second and the third intermediate relays to disconnect; and if input power is single-phase AC power, the control unit controls the first, the second and the third intermediate replays to close. The three-phase/single-phase compatible power switching circuit is employed, switching of the three-phase power and single-phase power input is realized, occupation space is small, and production cost is reduced.
Description
Technical field
The utility model relates to a kind of power supply switch circuit, relates in particular to a kind of three-phase/single-phase compatible power supply switch circuit.
Background technology
At present, most power circuit is all only for input three-phase alternating-current supply or single phase alternating current power supply.In order to realize the input of two types of power supplys, present stage the way of routine be that three phase mains and single phase poaer supply are respectively done an interface.Such as in the special vehicle field, three phase mains cable dish separates with the single phase poaer supply cable disc, does two cable discs, switches by contactor in distribution box and realizes the power supply conversion.But this scheme is equivalent to adopt separately two sockets, two cover drums, and cost is high, and workload is large, takes up room large.
The utility model content
The utility model is intended to solve the technical problem that exists in the prior art, and special innovation ground has proposed a kind of three-phase/single-phase compatible power supply switch circuit, has realized the switching that three phase mains and single phase poaer supply are inputted, and takes up room little and has reduced manufacturing cost.
In order to realize above-mentioned purpose of the present utility model, the utility model provides a kind of three-phase/single-phase compatible power supply switch circuit, comprise three phase mains incoming end (001,002 and 003), neutral line incoming end (004) and ground wire incoming end, it is characterized in that: also comprise the first auxiliary relay (KA1), the second auxiliary relay (KA2), the 3rd auxiliary relay (KA3) and control unit, wherein the first phase line connects the second phase line by this first auxiliary relay (KA1), the second phase line connects the third phase line by this second auxiliary relay (KA2), and the third phase line connects the neutral line by the 3rd auxiliary relay (KA3);
Described control unit is for detection of the type of input power;
When input power was three-phase alternating-current supply, this control unit was controlled the first auxiliary relay (KA1), the second auxiliary relay (KA2) and the 3rd auxiliary relay (KA3) and is disconnected;
When input power was single phase alternating current power supply, this control unit was controlled the first auxiliary relay (KA1), the second auxiliary relay (KA2) and the 3rd auxiliary relay (KA3) closure.
Realized the switching of three phase mains and single phase poaer supply input, taken up room little and reduced manufacturing cost.
This three-phase/single-phase compatible power supply switch circuit also comprises the first indicator light (H1), the second indicator light (H2) and the 3rd indicator light (H3), wherein the first phase line connects the second phase line by this first indicator light (H1), the second phase line connects the third phase line by this second indicator light (H2), and the third phase line connects the neutral line by the 3rd indicator light (H3).
Whether chargedly adopt three indicator lights to detect each phase line, so that whole galvanization is more directly perceived.
This three-phase/single-phase compatible power supply switch circuit also comprises and is connected to three phase sequence relays (KP) on the phase line.
Adopt phase sequence relay can prevent motor reversal, avoid motor to work even to damage.
This three-phase/single-phase compatible power supply switch circuit also comprises the 4th indicator light (H4), and the first phase line connects this neutral line by auxiliary normally-closed contact (KP1), the 4th indicator light (H4) of this phase sequence relay (KP1) successively.
Adopt the positive and negative situation of the 4th indicator light detection phase sequence, so that whole control procedure is more directly perceived.
Three phase mains incoming end (001,002 with is connected) is connected 004 with neutral line incoming end) connect three-phase power output end (014,015 and 016) and neutral line output (017) by earth leakage protective device QS1, contactor KM successively.Adopt earth leakage protective device that earth leakage protective is provided, adopt the switch of contactor control power supply.
In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:
1, adopts the first auxiliary relay, the second auxiliary relay, the 3rd auxiliary relay and control unit, realized the switching of three phase mains and single phase poaer supply input, take up room little and reduced manufacturing cost;
2, whether chargedly adopt three indicator lights to detect each phase line, so that whole galvanization is more directly perceived;
3, adopt phase sequence relay can prevent motor reversal, avoid motor to work even to damage;
4, adopt the positive and negative situation of the 4th indicator light detection phase sequence, so that whole control procedure is more directly perceived;
5, adopt earth leakage protective device that earth leakage protective is provided, adopt the switch of contactor control power supply.
Additional aspect of the present utility model and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or additional aspect of the present utility model and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is circuit diagram of the present utility model.
Embodiment
The below describes embodiment of the present utility model in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, except other has regulation and restriction, need to prove, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly to link to each other, and also can indirectly link to each other by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
As shown in Figure 1; this three-phase/single-phase compatible power supply switch circuit comprises three phase mains incoming end (namely 001,002 and 003), neutral line incoming end (namely 004) and ground wire incoming end, and wherein the three phase mains incoming end is connected with neutral line incoming end and is connected three-phase power output end (namely 014,015 and 016) and neutral line output (namely 017) by earth leakage protective device QS1, contactor KM.
This three-phase/single-phase compatible power supply switch circuit also comprises the first auxiliary relay KA1, the second auxiliary relay KA2, the 3rd auxiliary relay KA3 and control unit, wherein the first phase line connects the second phase line by the first auxiliary relay KA1, the second phase line connects the third phase line by the second auxiliary relay KA2, the third phase line connects the neutral line by the 3rd auxiliary relay KA3, and this control unit is for detection of the type of input power: when input power is three-phase alternating-current supply, control the first auxiliary relay KA1, the second auxiliary relay KA2 and the 3rd auxiliary relay KA3 disconnect, when input power is single phase alternating current power supply, control the first auxiliary relay KA1, the second auxiliary relay KA2 and the 3rd auxiliary relay KA3 are closed.Thus, this circuit has been realized the switching of three phase mains and single phase poaer supply input.It should be noted: this control unit can be distribution box, and the neutral line, ground wire are docked in the distribution box.
This three-phase/single-phase compatible power supply switch circuit also comprises the first indicator light H1, the second indicator light H2 and the 3rd indicator light H3, wherein the first phase line connects the second phase line by the first indicator light H1, the second phase line connects the third phase line by the second indicator light H2, and the third phase line connects the neutral line by the 3rd indicator light H3.Whether these three indicator lights are respectively applied to detect each phase line charged: if charged then three indicator lights are in illuminating state, extinguish state otherwise be in.
This three-phase/single-phase compatible power supply switch circuit also comprises phase sequence relay KP and the 4th indicator light H4, wherein this phase sequence relay KP is connected on three phase lines, and the first phase line connects the neutral line by auxiliary normally-closed contact KP1, the 4th indicator light H4 of phase sequence relay KP successively.In the normal situation of phase sequence, phase sequence relay KP is in conducting state, and its auxiliary normally-closed contact KP1 is in off-state, and the 4th indicator light H4 extinguishes; In the situation that phase sequence is unusual, phase sequence relay KP disconnects, and its auxiliary normally-closed contact KP1 is closed, and the 4th indicator light H4 lights.Thus, this circuit can prevent motor reversal, avoids motor to work even to damage.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: in the situation that do not break away from principle of the present utility model and aim can be carried out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is limited by claim and equivalent thereof.
Claims (5)
1. three-phase/single-phase compatible power supply switch circuit, comprise three phase mains incoming end (001,002 and 003), neutral line incoming end (004) and ground wire incoming end, it is characterized in that: also comprise the first auxiliary relay (KA1), the second auxiliary relay (KA2), the 3rd auxiliary relay (KA3) and control unit, wherein the first phase line connects the second phase line by this first auxiliary relay (KA1), the second phase line connects the third phase line by this second auxiliary relay (KA2), and the third phase line connects the neutral line by the 3rd auxiliary relay (KA3);
Described control unit is for detection of the type of input power;
When input power was three-phase alternating-current supply, this control unit was controlled the first auxiliary relay (KA1), the second auxiliary relay (KA2) and the 3rd auxiliary relay (KA3) and is disconnected;
When input power was single phase alternating current power supply, this control unit was controlled the first auxiliary relay (KA1), the second auxiliary relay (KA2) and the 3rd auxiliary relay (KA3) closure.
2. three-phase according to claim 1/single-phase compatible power supply switch circuit, it is characterized in that: also comprise the first indicator light (H1), the second indicator light (H2) and the 3rd indicator light (H3), wherein the first phase line connects the second phase line by this first indicator light (H1), the second phase line connects the third phase line by this second indicator light (H2), and the third phase line connects the neutral line by the 3rd indicator light (H3).
3. three-phase according to claim 1 and 2/single-phase compatible power supply switch circuit is characterized in that: also comprise being connected to three phase sequence relays (KP) on the phase line.
4. three-phase according to claim 3/single-phase compatible power supply switch circuit, it is characterized in that: also comprise the 4th indicator light (H4), the first phase line connects this neutral line by auxiliary normally-closed contact (KP1), the 4th indicator light (H4) of this phase sequence relay (KP1) successively.
5. three-phase according to claim 1 and 2/single-phase compatible power supply switch circuit is characterized in that: three phase mains incoming end (001,002 with is connected) is connected 004 with neutral line incoming end) connect three-phase power output end (014,015 and 016) and neutral line output (017) by earth leakage protective device (QS1), contactor (KM) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220490050 CN202906565U (en) | 2012-09-24 | 2012-09-24 | Three-phase/single-phase compatible power switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220490050 CN202906565U (en) | 2012-09-24 | 2012-09-24 | Three-phase/single-phase compatible power switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202906565U true CN202906565U (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220490050 Expired - Fee Related CN202906565U (en) | 2012-09-24 | 2012-09-24 | Three-phase/single-phase compatible power switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202906565U (en) |
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2012
- 2012-09-24 CN CN 201220490050 patent/CN202906565U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20140924 |
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| EXPY | Termination of patent right or utility model |