CN203870159U - Digital three-phase voltmeter measuring line voltage and phase voltage simultaneously - Google Patents
Digital three-phase voltmeter measuring line voltage and phase voltage simultaneously Download PDFInfo
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- CN203870159U CN203870159U CN201420259662.6U CN201420259662U CN203870159U CN 203870159 U CN203870159 U CN 203870159U CN 201420259662 U CN201420259662 U CN 201420259662U CN 203870159 U CN203870159 U CN 203870159U
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- 238000009434 installation Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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Abstract
The utility model discloses a digital three-phase voltmeter measuring line voltage and phase voltage simultaneously. The digital three-phase voltmeter includes four terminals, i.e., the first terminal, the second terminal, the third terminal and the fourth terminal, the first terminal is connected with phase A, the second terminal is connected with phase B, the third terminal is connected with phase C, the fourth terminal is connected with line N, the second terminal and the phase B are connected through a first lead, the fourth terminal and the line N are connected through a second lead, a first contact is arranged between the first lead and the second lead, and a second contact is arranged on the second lead. According to the digital three-phase voltmeter measuring the line voltage and the phase voltage simultaneously in the utility model, by adding a change-over switch or a rotary switch on the basis of an existing digital three-phase voltmeter, the digital three-phase voltmeter can measure both the line voltage and the phase voltage, thereby satisfying measuring requirement of different occasions; and at the same time, investment can be saved, and the installation area of a switch cabinet or a distribution box can be reduced.
Description
Technical field
The utility model belongs to technical field of electricity, is specifically related to the digital three-phase voltage meter of a kind of while slotted line voltage and phase voltage.
Background technology
In industrial and civilian engineering design, the advantage that digital watch is directly perceived with reading, range ability is large, measurement parameter is many, has been substituted pointer gauge.
In digital three-phase voltage meter, the input mode of voltage signal is divided into " directly input " and " through voltage transformer (VT) input " two kinds.No matter the input mode of voltage signal is any, and the mode of connection has " phase three-wire three formula " and " three-phase and four-line formula " two kinds, and what " phase three-wire three formula " wiring was measured is line voltage, and what " three-phase and four-line formula " wiring was measured is phase voltage.
The voltage signal " directly input " of take is example, and two kinds of modes of connection of digital three-phase voltage meter as depicted in figs. 1 and 2.
In engineering application, different occasions has different requirements to the measurement of three-phase voltage, and some occasions will be measured three-phase line voltage, and some occasions will be measured three-phase phase voltage.If it is single that measurement requires, need only the voltage circuit of digital three-phase voltage meter according to desired martingale.
But in most occasions, should measure three-phase line voltage and measure again three-phase phase voltage.Often adopt two digital three-phase voltage meters, the voltage circuit of a table adopts the mode of connection of three-phase and four-line, for measuring three-phase phase voltage; The voltage circuit of another piece table adopts the mode of connection of phase three-wire three, for measuring three-phase line voltage.Although do like this, having met measurement requirement, not only increased investment but also accounted for erection space more, is not best solution.
Utility model content
Goal of the invention: in order to overcome the deficiencies in the prior art, the utility model provides the digital three-phase voltage meter of a kind of while slotted line voltage and phase voltage, make the digital three-phase voltage meter not only can slotted line voltage but also can measure phase voltage, meet the measurement requirement of different occasions.
Technical scheme: for achieving the above object, the digital three-phase voltage meter of a kind of while slotted line voltage of the present utility model and phase voltage, comprise digital three-phase voltage meter, described digital three-phase voltage meter comprises four terminals and two power interfaces, it is the first terminal, the second terminal, the 3rd terminal and the 4th terminal, described the first terminal is connected with A, the second terminal is connected with B, the 3rd terminal is connected with C, the 4th terminal is connected with N line, described the second terminal is connected by the first wire with B, the 4th terminal is connected by the second wire with N line, a power interface connects positive source, positive source is provided with fuse, a power interface connects power cathode, between the first wire and the second wire, be provided with the first contact, the second wire is provided with the second contact, the first contact is connected, when the second contact disconnects, what digital three-phase voltage meter was measured is line voltage, when the second contact connection, the first contact disconnect, what digital three-phase voltage meter was measured is phase voltage.
As preferably, the first contact that described the first contact is switch, the second contact that the second contact is switch, when switch is positioned at gear 1, the first contact is communicated with, and the second terminal and the 4th terminal are connected, and what digital three-phase voltage meter was measured is line voltage; When switch is positioned at gear 2, when the second contact is communicated with, the 4th terminal and N line are connected, and what digital three-phase voltage meter was measured is phase voltage.
As preferably, the normally closed contact that described the first contact is relay, the second contact is the normal opened contact of relay, between positive source and power cathode, be connected in series relay and rotary switch, when rotary switch is connected, relay obtains electric, and normally closed contact disconnects the second terminal and the 4th terminal of digital three-phase voltage meter, its normal opened contact is communicated with the 4th terminal and the N line of digital three-phase voltage meter, and what digital three-phase voltage meter was measured is phase voltage; When rotary switch disconnects, relay electric-loss, normally closed contact is connected the second terminal and the 4th terminal of digital three-phase voltage meter, and normal opened contact disconnects the 4th terminal and the N line of three-phase voltage meter, and what digital three-phase voltage meter was measured is line voltage.
In the utility model, switch has two positions, is respectively a set and " 2 ", corresponding the first contact of position set, and position " 2 " corresponding second contact, when switch steering position " 1 ", the first contacting, the second contact disconnects; When switch steering position " 2 ", the first contact disconnects, the second contacting.
Beneficial effect: the digital three-phase voltage meter of while slotted line voltage of the present utility model and phase voltage, by increasing switch or rotary switch at existing digital three-phase voltage meter, make the digital three-phase voltage meter not only can slotted line voltage but also can measure phase voltage, meet the measurement requirement of different occasions; Can reduce investment outlay, reduce the erection space of switch cubicle or panel box simultaneously.
Accompanying drawing explanation
Fig. 1 is the key wiring diagram of digital three-phase voltage meter slotted line voltage;
Fig. 2 is the key wiring diagram that digital three-phase voltage meter is measured phase voltage;
Fig. 3 is a kind of embodiment of the present utility model;
Fig. 4 is another embodiment of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 3, the digital three-phase voltage meter of a kind of while slotted line voltage of the present utility model and phase voltage, digital three-phase voltage meter, digital three-phase voltage meter comprises two power interfaces and four terminals, it is the first terminal, the second terminal, the 3rd terminal and the 4th terminal, the first terminal is connected with A, the second terminal is connected with B, the 3rd terminal is connected with C, the 4th terminal is connected with N line, the second terminal is connected by the first wire with B, the 4th terminal is connected by the second wire with N line, a power interface connects positive source, positive source is provided with fuse, a power interface connects power cathode, between the first wire and the second wire, be provided with the first contact, the second wire is provided with the second contact, the first contact is the first contact of switch, the second contact is the second contact of switch, when switch is positioned at gear 1, the first contact is communicated with, the second terminal and the 4th terminal are connected, what digital three-phase voltage meter was measured is line voltage.
When switch SA is during in gear 1, the second terminal of digital three-phase voltage meter and the 4th terminal are connected, the 4th terminal is connected disconnects with N line, and what digital three-phase voltage meter was measured is line voltage.
When switch SA is during in gear 2, the second terminal of digital three-phase voltage meter and the 4th terminal disconnect, the 4th terminal is connected connects with N line, and what digital three-phase voltage meter was measured is phase voltage.
As shown in Figure IV, the normally closed contact that the first contact is relay, the normal opened contact that the second contact is relay, is connected in series relay and rotary switch between positive source and power cathode.
When rotary switch SB disconnects, relay K A dead electricity, its normally closed contact is communicated with the second terminal and the 4th terminal of digital three-phase voltage meter, and its normal opened contact disconnects the 4th terminal and the N line of digital three-phase voltage meter, and what digital three-phase voltage meter was measured is line voltage.
When rotary switch SB connects, relay K A obtains electric, its normally closed contact disconnects the second terminal of digital three-phase voltage meter and the 4th terminal and the N line that the 4th terminal, its normal opened contact are communicated with digital three-phase voltage meter, and what digital three-phase voltage meter was measured is phase voltage.
The above is only preferred implementation of the present utility model; be noted that for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1. the digital three-phase voltage meter of slotted line voltage and phase voltage simultaneously, comprise digital three-phase voltage meter, described digital three-phase voltage meter comprises two power interfaces and four terminals, be the first terminal (11), the second terminal (12), the 3rd terminal (13) and the 4th terminal (14), described the first terminal (11) is connected with A, the second terminal (12) is connected with B, the 3rd terminal (13) is connected with C, the 4th terminal (14) is connected with N line, a power interface connects positive source, positive source is provided with fuse, a power interface connects power cathode, it is characterized in that: described the second terminal (12) is connected by the first wire with B, the 4th terminal (14) is connected by the second wire with N line, between the first wire and the second wire, be provided with the first contact, the second wire is provided with the second contact, the first contact is connected, when the second contact disconnects, what digital three-phase voltage meter was measured is line voltage, when the second contact connection, the first contact disconnect, what digital three-phase voltage meter was measured is phase voltage.
2. the digital three-phase voltage meter of while slotted line voltage according to claim 1 and phase voltage, it is characterized in that: the first contact that described the first contact is switch, the second contact is the second contact of switch, when the first contact is communicated with, the second terminal (12) and the 4th terminal (14) are connected, and what digital three-phase voltage meter was measured is line voltage; When the second contact is communicated with, the 4th terminal (14) and N line are connected, and what digital three-phase voltage meter was measured is phase voltage.
3. the digital three-phase voltage meter of while slotted line voltage according to claim 1 and phase voltage, it is characterized in that: the normally closed contact that described the first contact is relay, the second contact is the normal opened contact of relay, between positive source and power cathode, be connected in series relay and rotary switch, when rotary switch is connected, relay obtains electric, normally closed contact disconnects the second terminal (12) and the 4th terminal (14) of digital three-phase voltage meter, its normal opened contact is communicated with the 4th terminal (14) and N line of digital three-phase voltage meter, what digital three-phase voltage meter was measured is phase voltage, when rotary switch disconnects, relay electric-loss, normally closed contact is connected the second terminal (12) and the 4th terminal (14) of digital three-phase voltage meter, and normal opened contact disconnects the 4th terminal (14) and N line of three-phase voltage meter, and what digital three-phase voltage meter was measured is line voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420259662.6U CN203870159U (en) | 2014-05-20 | 2014-05-20 | Digital three-phase voltmeter measuring line voltage and phase voltage simultaneously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420259662.6U CN203870159U (en) | 2014-05-20 | 2014-05-20 | Digital three-phase voltmeter measuring line voltage and phase voltage simultaneously |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203870159U true CN203870159U (en) | 2014-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420259662.6U Expired - Fee Related CN203870159U (en) | 2014-05-20 | 2014-05-20 | Digital three-phase voltmeter measuring line voltage and phase voltage simultaneously |
Country Status (1)
| Country | Link |
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| CN (1) | CN203870159U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117192189A (en) * | 2023-11-03 | 2023-12-08 | 浙江正泰物联技术有限公司 | Three-phase voltage measurement circuit, method and three-phase ammeter |
-
2014
- 2014-05-20 CN CN201420259662.6U patent/CN203870159U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117192189A (en) * | 2023-11-03 | 2023-12-08 | 浙江正泰物联技术有限公司 | Three-phase voltage measurement circuit, method and three-phase ammeter |
| CN117192189B (en) * | 2023-11-03 | 2024-03-12 | 浙江正泰物联技术有限公司 | Three-phase voltage measurement circuit, method and three-phase ammeter |
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Legal Events
| 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: 20141008 Termination date: 20180520 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |