CN204479643U - A kind of electrification indicating circuit for three-phase voltage system - Google Patents
A kind of electrification indicating circuit for three-phase voltage system Download PDFInfo
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- CN204479643U CN204479643U CN201520084791.0U CN201520084791U CN204479643U CN 204479643 U CN204479643 U CN 204479643U CN 201520084791 U CN201520084791 U CN 201520084791U CN 204479643 U CN204479643 U CN 204479643U
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Abstract
The utility model relates to electric device maintenance technical field, discloses a kind of electrification indicating circuit for three-phase voltage system.The described electrification indicating circuit for three-phase voltage system, is characterized in that, comprising: the rectification drive unit that A phase sensing unit, B phase sensing unit, C phase sensing unit, 3 tunnels are identical and Tricolor LED; A phase sensing unit, B phase sensing unit are connected a road rectification drive unit respectively with C phase sensing unit, and 3 tunnel rectification drive unit connect same Tricolor LED.Described electrification indicating circuit is configured with a Tricolor LED, the different colours utilizing Tricolor LED to send is to the charged situation indicating A line in Devices to test, B line different with C line, the surface area taking housing due to flash component is less, can be beneficial to the Miniaturization Design of potential indicator.
Description
Technical field
The utility model relates to electric device maintenance technical field, particularly, relates to a kind of electrification indicating circuit for three-phase voltage system.
Background technology
Potential indicator is that one is directly installed on indoor electric equipment, and whether display Devices to test directly perceived is with the indicative safety feature of working voltage.Existing potential indicator can be divided into active and passive two kinds by mode of operation, and the former needs additional power source powered operation, and latter, without the need to additional power source, utilizes self to get inductive energy from Devices to test and provides working power.The potential indicator of passive mode is adopted to have the advantages such as simple, the easy to maintenance and long service life of structure.
Conventional potential indicator mainly comprises induction module and display module, wherein induction module in safe range, untouchable from treating that side apparatus obtains inductive energy, then inductive energy is passed to display module, whether inductive energy acts on flash component by display module, charged by the luminous situation instruction Devices to test of flash component.When Devices to test is charged, induction module obtains inductive energy, and inductive energy acts on flash component the most at last, makes flash component luminescence instruction Devices to test charged; And when Devices to test is without electricity, induction module cannot obtain inductive energy, flash component is not luminous, and without indicating or indicating, Devices to test is not charged.Whether, because the Devices to test being applied in three-phase voltage system needs the charged situation of measurement 3 wire (A line, B line and C line), therefore this type of potential indicator is configured with 3 groups of flash components, to indicate A line, B line and C line charged respectively.Consider that 3 flash components need to take certain surface of shell and amass, will the Miniaturization Design of check strap electrical indicator, be therefore necessary to improve.
For the limitation of above-mentioned potential indicator, need to design a kind of potential indicator being applicable to three-phase voltage system, only use one group of flash component can indicate the charged situation of 3 wires in Devices to test, thus make flash component take less surface of shell to amass, be beneficial to the Miniaturization Design of potential indicator.
Utility model content
For the limitation of aforementioned strip electrical indicator, the utility model provides a kind of electrification indicating circuit for three-phase voltage system, only use one group of flash component can indicate the charged situation of 3 wires in Devices to test, the surface area taking housing due to flash component is less, can be beneficial to the Miniaturization Design of potential indicator.
The technical solution adopted in the utility model, provides a kind of electrification indicating circuit for three-phase voltage system, it is characterized in that, comprising: the rectification drive unit that A phase sensing unit, B phase sensing unit, C phase sensing unit, 3 tunnels are identical and Tricolor LED; A phase sensing unit, B phase sensing unit are connected a road rectification drive unit respectively with C phase sensing unit, and 3 tunnel rectification drive unit connect same Tricolor LED.
Using described measuring device with electricity to measure in the whether charged process of Devices to test, A phase sensing unit for responding to the working voltage between A line and ground wire, and obtains inductive energy when A tape electricity from A line; B phase sensing unit for responding to the working voltage between B line and ground wire, and obtains inductive energy when B tape electricity from B line; C phase sensing unit for responding to the working voltage between C line and ground wire, and obtains inductive energy when C tape electricity from C line; Described rectification drive unit is used for inductive energy that obtained by connected sensing unit, alternating current form and changes into the inductive energy of direct current form, and carries out accumulation of energy with the light driving Tricolor LED to send corresponding color; The charged situation that described Tricolor LED indicates A line, B line different with C line for sending different colours light.Although described electrification indicating circuit only uses a Tricolor LED, but the mode by point color indicates the charged situation of 3 wires in Devices to test, because Tricolor LED is similar to the light emitting diode size of current employing, therefore flash component takies the surface area of housing less, can be beneficial to the Miniaturization Design of potential indicator.
Concrete, described Tricolor LED is common cathode polar form Tricolor LED or common anode polar form Tricolor LED.
Concrete, described rectification drive unit comprises diode D1, diode D2, diode D3, diode D4, electric capacity C1, driving circuit, first input end, the second input end, the first output terminal and the second output terminal; Described driving circuit comprises first input end, the second input end, the first output terminal and the second output terminal;
The anode of described diode D1 connects the negative electrode of diode D2, the negative electrode of diode D1 connects the negative electrode of diode D4 and the first end of electric capacity C1 simultaneously, the anode of diode D2 connects the anode of diode D3 and second end of electric capacity C1 simultaneously, and the negative electrode of diode D3 connects the anode of diode D4; The anode of described diode D1 also connects the first input end of rectification drive unit simultaneously, the anode of diode D4 also connects the second input end of rectification drive unit simultaneously, the first end of electric capacity C1 also connects the first input end of driving circuit simultaneously, second end of electric capacity C1 also connects the second input end of driving circuit simultaneously, first output terminal of driving circuit connects the first output terminal of rectification drive unit, and the second output terminal of driving circuit connects the second output terminal of rectification drive unit.Described diode D1, diode D2, diode D3 and diode D4 form a bridge rectifier circuit, inductive energy that the sensing unit be connected with rectification drive unit can be obtained, that have alternating current form is converted into the inductive energy of direct current form, and in the charging accumulation of energy of electric capacity C1 place, to drive Tricolor LED to send the light of corresponding color.
Concrete further, described driving circuit also comprises stabilivolt DZ1, diode D5, unidirectional thyristor SCR1 and resistance R1; The negative electrode of described stabilivolt DZ1 connects first input end and the unidirectional thyristor SCR1 anode of driving circuit simultaneously, the anode of stabilivolt DZ1 connects the anode of diode D5, the negative electrode of diode D5 connects the gate pole of unidirectional thyristor SCR1, the first end of the negative electrode contact resistance R1 of unidirectional thyristor SCR1, second end of resistance R1 connects the first output terminal of driving circuit, and the second input end of driving circuit connects the second output terminal of driving circuit.
Concrete, described Tricolor LED is common cathode polar form Tricolor LED, and common cathode polar form Tricolor LED comprises 3 anodes and 1 common cathode; First output terminal of 3 tunnel rectification drive unit connects 1 anode of common cathode polar form Tricolor LED respectively, and the second output terminal of 3 tunnel rectification drive unit connects the common cathode of common cathode polar form Tricolor LED simultaneously.
Concrete, described Tricolor LED is common anode polar form Tricolor LED, and common anode polar form Tricolor LED comprises 1 common anode pole and 3 negative electrodes; First output terminal of 3 tunnel rectification drive unit connects the common anode pole of common anode polar form Tricolor LED simultaneously, and the second output terminal of 3 tunnel rectification drive unit connects 1 negative electrode of common anode polar form Tricolor LED respectively.
Concrete, described A phase sensing unit is made up of the first induction pole plate GB1 and the 4th induction pole plate GB4, and the first induction pole plate GB1 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit; Described B phase sensing unit is made up of the second induction pole plate GB2 and the 4th induction pole plate GB4, and the second induction pole plate GB2 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit; Described C phase sensing unit is made up of the 3rd induction pole plate GB3 and the 4th induction pole plate GB4, and the 3rd induction pole plate GB3 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit.Described first induction pole plate GB1 is used near A line, second induction pole plate GB2 is used near B line, 3rd induction pole plate GB3 is used near C line, 4th induction pole plate GB4 is used near ground wire, therefore the A phase sensing unit be made up of the first induction pole plate GB1 and the 4th induction pole plate GB4 can respond to the working voltage between A line and ground wire, the B phase sensing unit be made up of the second induction pole plate GB2 and the 4th induction pole plate GB4 can respond to the working voltage between B line and ground wire, the C phase sensing unit be made up of the 3rd induction pole plate GB3 and the 4th induction pole plate GB4 can respond to the working voltage between C line and ground wire.
To sum up, adopt the electrification indicating circuit for three-phase voltage system provided by the utility model, described electrification indicating circuit is configured with a Tricolor LED, the different colours utilizing Tricolor LED to send is to the charged situation indicating A line in Devices to test, B line different with C line, the surface area taking housing due to flash component is less, can be beneficial to the Miniaturization Design of potential indicator.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the first electrification indicating circuit figure for three-phase voltage system that the utility model embodiment provides.
Fig. 2 is the first circuit diagram for rectification drive unit in the electrification indicating circuit of three-phase voltage system that the utility model embodiment provides.
Fig. 3 is the electrification indicating circuit figure of the second of providing of the utility model embodiment for three-phase voltage system.
Embodiment
Hereinafter with reference to accompanying drawing, describe by way of example the electrification indicating circuit for three-phase voltage system that the utility model provides in detail.It should be noted that at this, the explanation for these way of example understands the utility model for helping, but does not form restriction of the present utility model.
Various technology described herein may be used for but is not limited to electric device maintenance technical field, can also be used for other similar field.
Term " positive pole " and " anode " are often used interchangeably in the text herein, and term " negative pole " and " negative electrode " are often used interchangeably in the text.Term "and/or" herein, it is only a kind of incidence relation describing affiliated partner, three kinds of relations can be there are in expression, such as, A and/or B, can represent: individualism A, individualism B, there are A and B tri-kinds of situations simultaneously, herein term " or/and " be describe another kind of affiliated partner relation, can there are two kinds of relations in expression, such as, A is or/and B, can represent: individualism A, individualism A and B two kinds of situations, in addition, character "/" herein, general expression forward-backward correlation is to liking a kind of "or" relation.
Embodiment one, Fig. 1 shows the first electrification indicating circuit figure for three-phase voltage system that the present embodiment provides, and it is the first circuit diagram for rectification drive unit in the electrification indicating circuit of three-phase voltage system that the present embodiment provides that Fig. 2 shows Fig. 2.The described electrification indicating circuit for three-phase voltage system, is characterized in that, comprising: the rectification drive unit that A phase sensing unit, B phase sensing unit, C phase sensing unit, 3 tunnels are identical and Tricolor LED; A phase sensing unit, B phase sensing unit are connected a road rectification drive unit respectively with C phase sensing unit, and 3 tunnel rectification drive unit connect same Tricolor LED.Using described measuring device with electricity to measure in the whether charged process of Devices to test, A phase sensing unit for responding to the working voltage between A line and ground wire, and obtains inductive energy when A tape electricity from A line; B phase sensing unit for responding to the working voltage between B line and ground wire, and obtains inductive energy when B tape electricity from B line; C phase sensing unit for responding to the working voltage between C line and ground wire, and obtains inductive energy when C tape electricity from C line; Described rectification drive unit is used for inductive energy that obtained by connected sensing unit, alternating current form and changes into the inductive energy of direct current form, and carries out accumulation of energy with the light driving Tricolor LED to send corresponding color; The charged situation that described Tricolor LED indicates A line, B line different with C line for sending different colours light.Although described electrification indicating circuit only uses a Tricolor LED, but the mode by point color indicates the charged situation of 3 wires in Devices to test, because Tricolor LED is similar to the light emitting diode size of current employing, therefore flash component takies the surface area of housing less, can be beneficial to the Miniaturization Design of potential indicator.
Concrete, described rectification drive unit comprises diode D1, diode D2, diode D3, diode D4, electric capacity C1, driving circuit, first input end, the second input end, the first output terminal and the second output terminal; Described driving circuit comprises first input end, the second input end, the first output terminal and the second output terminal;
The anode of described diode D1 connects the negative electrode of diode D2, the negative electrode of diode D1 connects the negative electrode of diode D4 and the first end of electric capacity C1 simultaneously, the anode of diode D2 connects the anode of diode D3 and second end of electric capacity C1 simultaneously, and the negative electrode of diode D3 connects the anode of diode D4; The anode of described diode D1 also connects the first input end of rectification drive unit simultaneously, the anode of diode D4 also connects the second input end of rectification drive unit simultaneously, the first end of electric capacity C1 also connects the first input end of driving circuit simultaneously, second end of electric capacity C1 also connects the second input end of driving circuit simultaneously, first output terminal of driving circuit connects the first output terminal of rectification drive unit, and the second output terminal of driving circuit connects the second output terminal of rectification drive unit.Described diode D1, diode D2, diode D3 and diode D4 form a bridge rectifier circuit, inductive energy that the sensing unit be connected with rectification drive unit can be obtained, that have alternating current form is converted into the inductive energy of direct current form, and in the charging accumulation of energy of electric capacity C1 place, to drive Tricolor LED to send the light of corresponding color.
Described driving circuit concrete further also comprises stabilivolt DZ1, diode D5, unidirectional thyristor SCR1 and resistance R1; The negative electrode of described stabilivolt DZ1 connects first input end and the unidirectional thyristor SCR1 anode of driving circuit simultaneously, the anode of stabilivolt DZ1 connects the anode of diode D5, the negative electrode of diode D5 connects the gate pole of unidirectional thyristor SCR1, the first end of the negative electrode contact resistance R1 of unidirectional thyristor SCR1, second end of resistance R1 connects the first output terminal of driving circuit, and the second input end of driving circuit connects the second output terminal of driving circuit.When the inductive energy that described driving circuit is used for storing at electric capacity C1 place is enough to effectively drive Tricolor LED to send the light of corresponding color, conducting loop makes Tricolor LED send the light of corresponding color; When the inductive energy stored at electric capacity C1 place is not enough to effectively drive Tricolor LED to send the light of corresponding color, closes closed loop and make C1 continue charging.
Concrete, described Tricolor LED is common cathode polar form Tricolor LED, and common cathode polar form Tricolor LED comprises 3 anodes and 1 common cathode; First output terminal of 3 tunnel rectification drive unit connects 1 anode of common cathode polar form Tricolor LED respectively, and the second output terminal of 3 tunnel rectification drive unit connects the common cathode of common cathode polar form Tricolor LED simultaneously.Described Tricolor LED is the one in light emitting diode, PN junctions different for 3 glow colors is encapsulated in a transparent tube core by it, both three PN junctions can have been made to send the light of corresponding color respectively, wherein any two PN junctions or three PN junctions also can be made simultaneously to send the light of corresponding color.Citing, the Tricolor LED of ruddiness, green glow and blue light can be sent for one, in the present embodiment, the first output terminal arranging rectification drive unit corresponding to A phase sensing unit connects the PN junction anode that can send ruddiness, the first output terminal arranging rectification drive unit corresponding to B phase sensing unit connects the PN junction anode that can send green glow, the first output terminal arranging rectification drive unit corresponding to C phase sensing unit connects the PN junction anode that can send blue light, then as shown in table 1 below for the instruction content that the different luminous situation of described Tricolor LED is corresponding:
The corresponding table of luminescence instruction of table 1, Tricolor LED
Concrete, described A phase sensing unit is made up of the first induction pole plate GB1 and the 4th induction pole plate GB4, and the first induction pole plate GB1 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit; Described B phase sensing unit is made up of the second induction pole plate GB2 and the 4th induction pole plate GB4, and the second induction pole plate GB2 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit; Described C phase sensing unit is made up of the 3rd induction pole plate GB3 and the 4th induction pole plate GB4, and the 3rd induction pole plate GB3 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit.Described first induction pole plate GB1 is used near A line, second induction pole plate GB2 is used near B line, 3rd induction pole plate GB3 is used near C line, 4th induction pole plate GB4 is used near ground wire, therefore the A phase sensing unit be made up of the first induction pole plate GB1 and the 4th induction pole plate GB4 can respond to the working voltage between A line and ground wire, the B phase sensing unit be made up of the second induction pole plate GB2 and the 4th induction pole plate GB4 can respond to the working voltage between B line and ground wire, the C phase sensing unit be made up of the 3rd induction pole plate GB3 and the 4th induction pole plate GB4 can respond to the working voltage between C line and ground wire.
The principle of work of the electrification indicating circuit for three-phase voltage system that embodiment one provides is as follows: the A line in Devices to test, when B line and C line are distinguished charged, utilize high voltage induction principle, described A phase sensing unit, B phase sensing unit and C phase sensing unit can obtain inductive energy non-contactly from corresponding line, the inductive energy of alternating current form is converted into the inductive energy of direct current form by the bridge rectifier circuit in corresponding rectification drive unit, DC voltage after rectification carries out charging accumulation of energy and filtering at corresponding electric capacity C1 place, along with the rising of corresponding electric capacity C1 both end voltage, when reaching first object voltage (when the inductive energy that electric capacity C1 stores is enough to effectively drive Tricolor LED to send the light of corresponding color), stabilivolt DZ1 in corresponding driving circuit and diode D5 conducting, thus be the gate pole input trigger voltage/electric current of unidirectional thyristor SCR1, make conducting between the anode of unidirectional thyristor SCR1 and negative electrode, electric capacity C1 discharges and discharges inductive energy, and drive Tricolor LED to send the light of corresponding color.Electric capacity C1 in rectification drive unit declines through overdischarge both end voltage, when the inductive energy that electric capacity C1 stores is not enough to effectively drive Tricolor LED to send the light of corresponding color, stabilivolt DZ1 in corresponding driving circuit and diode D5 ends, also end between the anode of unidirectional thyristor SCR1 and negative electrode, electric capacity C1 enters into charging process again, continues the inductive energy storing the acquisition of corresponding sensing unit.
The electrification indicating circuit for three-phase voltage system described described in the present embodiment, described electrification indicating circuit is configured with a Tricolor LED, the different colours utilizing Tricolor LED to send is to the charged situation indicating A line in Devices to test, B line different with C line, the surface area taking housing due to flash component is less, can be beneficial to the Miniaturization Design of potential indicator.
Embodiment two, Fig. 3 shows the second that the present embodiment provides electrification indicating circuit figure for three-phase voltage system.The difference of the electrification indicating circuit for three-phase voltage system that embodiment two provides and the electrification indicating circuit for three-phase voltage system that embodiment one provides is: described Tricolor LED is common anode polar form Tricolor LED, and common anode polar form Tricolor LED comprises 1 common anode pole and 3 negative electrodes; First output terminal of 3 tunnel rectification drive unit connects the common anode pole of common anode polar form Tricolor LED simultaneously, and the second output terminal of 3 tunnel rectification drive unit connects 1 negative electrode of common anode polar form Tricolor LED respectively.
Described circuit structure in embodiment two illustrates the concrete connected mode of another kind of Tricolor LED, and its technique effect can, with reference to the technique effect of embodiment one, not needed can be obtained by performing creative labour.
As mentioned above, the utility model can be realized preferably.For a person skilled in the art, according to instruction of the present utility model, designing the multi-form electrification indicating circuit for three-phase voltage system does not need performing creative labour.When not departing from principle of the present utility model and spirit, these embodiments being changed, revising, replace, integrate and modification still falls in protection domain of the present utility model.
Claims (7)
1. for an electrification indicating circuit for three-phase voltage system, it is characterized in that, comprising: the rectification drive unit that A phase sensing unit, B phase sensing unit, C phase sensing unit, 3 tunnels are identical and Tricolor LED;
A phase sensing unit, B phase sensing unit are connected a road rectification drive unit respectively with C phase sensing unit, and 3 tunnel rectification drive unit connect same Tricolor LED.
2. a kind of electrification indicating circuit for three-phase voltage system as claimed in claim 1, it is characterized in that, described Tricolor LED is common cathode polar form Tricolor LED or common anode polar form Tricolor LED.
3. a kind of electrification indicating circuit for three-phase voltage system as claimed in claim 1, it is characterized in that, described rectification drive unit comprises diode D1, diode D2, diode D3, diode D4, electric capacity C1, driving circuit, first input end, the second input end, the first output terminal and the second output terminal;
Described driving circuit comprises first input end, the second input end, the first output terminal and the second output terminal;
The anode of described diode D1 connects the negative electrode of diode D2, the negative electrode of diode D1 connects the negative electrode of diode D4 and the first end of electric capacity C1 simultaneously, the anode of diode D2 connects the anode of diode D3 and second end of electric capacity C1 simultaneously, and the negative electrode of diode D3 connects the anode of diode D4;
The anode of described diode D1 also connects the first input end of rectification drive unit simultaneously, the anode of diode D4 also connects the second input end of rectification drive unit simultaneously, the first end of electric capacity C1 also connects the first input end of driving circuit simultaneously, second end of electric capacity C1 also connects the second input end of driving circuit simultaneously, first output terminal of driving circuit connects the first output terminal of rectification drive unit, and the second output terminal of driving circuit connects the second output terminal of rectification drive unit.
4. a kind of electrification indicating circuit for three-phase voltage system as claimed in claim 3, it is characterized in that, described driving circuit also comprises stabilivolt DZ1, diode D5, unidirectional thyristor SCR1 and resistance R1;
The negative electrode of described stabilivolt DZ1 connects first input end and the unidirectional thyristor SCR1 anode of driving circuit simultaneously, the anode of stabilivolt DZ1 connects the anode of diode D5, the negative electrode of diode D5 connects the gate pole of unidirectional thyristor SCR1, the first end of the negative electrode contact resistance R1 of unidirectional thyristor SCR1, second end of resistance R1 connects the first output terminal of driving circuit, and the second input end of driving circuit connects the second output terminal of driving circuit.
5. a kind of electrification indicating circuit for three-phase voltage system as claimed in claim 3, it is characterized in that, described Tricolor LED is common cathode polar form Tricolor LED, and common cathode polar form Tricolor LED comprises 3 anodes and 1 common cathode;
First output terminal of 3 tunnel rectification drive unit connects 1 anode of common cathode polar form Tricolor LED respectively, and the second output terminal of 3 tunnel rectification drive unit connects the common cathode of common cathode polar form Tricolor LED simultaneously.
6. a kind of electrification indicating circuit for three-phase voltage system as claimed in claim 3, it is characterized in that, described Tricolor LED is common anode polar form Tricolor LED, and common anode polar form Tricolor LED comprises 1 common anode pole and 3 negative electrodes;
First output terminal of 3 tunnel rectification drive unit connects the common anode pole of common anode polar form Tricolor LED simultaneously, and the second output terminal of 3 tunnel rectification drive unit connects 1 negative electrode of common anode polar form Tricolor LED respectively.
7. a kind of electrification indicating circuit for three-phase voltage system as claimed in claim 3, it is characterized in that, described A phase sensing unit is made up of the first induction pole plate GB1 and the 4th induction pole plate GB4, first induction pole plate GB1 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit;
Described B phase sensing unit is made up of the second induction pole plate GB2 and the 4th induction pole plate GB4, and the second induction pole plate GB2 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit;
Described C phase sensing unit is made up of the 3rd induction pole plate GB3 and the 4th induction pole plate GB4, and the 3rd induction pole plate GB3 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit.
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| CN201520084791.0U CN204479643U (en) | 2015-02-06 | 2015-02-06 | A kind of electrification indicating circuit for three-phase voltage system |
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| CN201520084791.0U CN204479643U (en) | 2015-02-06 | 2015-02-06 | A kind of electrification indicating circuit for three-phase voltage system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104635021A (en) * | 2015-02-06 | 2015-05-20 | 四川蓝讯宝迩电子科技有限公司 | Charge indicator for three-phase electrical system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104635021A (en) * | 2015-02-06 | 2015-05-20 | 四川蓝讯宝迩电子科技有限公司 | Charge indicator for three-phase electrical system |
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Granted publication date: 20150715 Termination date: 20160206 |