CN102095912A - Electronic indicator - Google Patents
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- CN102095912A CN102095912A CN2010102622082A CN201010262208A CN102095912A CN 102095912 A CN102095912 A CN 102095912A CN 2010102622082 A CN2010102622082 A CN 2010102622082A CN 201010262208 A CN201010262208 A CN 201010262208A CN 102095912 A CN102095912 A CN 102095912A
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Abstract
The invention provides an electronic indicator, which is capable of transmitting error connections to users understandably even it is a main stream of an electronic indicator, namely cheap segmented liquid crystal or seven-segment LED. The electronic device is provided with: a measuring calculation part performing calculation of various measuring values according to currents and voltages inputted from a circuit; a display part displaying a measuring value calculated by the measuring calculation part, a phase angle calculation part disposed in the measuring calculation part and performing calculation of a phase angle according to currents and voltages, and a display mode switching part disposed in a display part and capable of performing switch of a measuring value display mode displaying the measuring value and an error connection display mode based on the phase angle calculation part.
Description
Technical field
The present invention relates to a kind of electronic indicator, its voltage and current to three-phase circuit is measured, electric parameters such as electric current and voltage power reactive power power factor frequency electric weight are carried out computing and demonstration, in detail, relate to the differentiation of the incorrect link of metering circuit.
Background technology
When electric parameter being carried out computing and showing, autogamy in the future places the current transformer of circuit or the input of transformer to send to this indicator usually, if but its connection this moment is inappropriate, so-called incorrect link takes place, then can't obtain correct demonstration certainly.Therefore, known following technology promptly, is carried out computing and is shown its result vector by the basic wave of measuring voltage and electric current according to each, thereby is informed in which current detection sensor place line (reference example such as patent documentation 1) that makes a mistake.
Patent documentation 1: TOHKEMY 2000-258484 communique (～the 6 page of left hurdle of the 22nd row, the 5th page of right hurdle the 7th row, Fig. 4～Fig. 8)
Summary of the invention
In the analyzer of patent documentation 1, need be used to show the dot matrix type display panels of polar plot or plasma display etc., this causes cost to raise certainly, and be envisioned that following problems, promptly, in this polar plot shows, owing to will be presented in the picture by a plurality of vectors that big low-angle is different, so complexity and indigestion.
The present invention proposes in order to solve above-mentioned problem, and its purpose is, even promptly cheap sectional type liquid crystal or the 7 sections LED of the main flow of electronic indicator also can pass on error connection line easy to understand ground to the user.
Electronic indicator involved in the present invention has: measure operational part, it carries out computing according to electric current, the voltage from the circuit input to various measured values; And display part, it shows the measured value that calculates by this measurement operational part, in described measurement operational part, be provided with the phasing degree operational part that the phasing degree is carried out computing according to described electric current, voltage, and, be provided with the display mode switching part in described display part, it is used for switching to the measured value display mode that shows described measured value with based on the error connection line display mode of described phasing degree operational part.
The effect of invention
As described above, the present invention can provide a kind of electronic indicator of cheapness, and it can prevent error connection line in advance when circuit arrangement.
Description of drawings
Fig. 1 is the front elevation of electronic indicator, and this electronic indicator representative is of the present invention
Fig. 2 is the block diagram of the structure in the presentation graphs 1.
Fig. 3 is the normal line graph of three-phase 3 lines.
Fig. 4 is the polar plot of Fig. 3.
Fig. 5 is the table of the content of the error connection line display mode under each connected mode of expression.
Fig. 6 is the block diagram of the structure of expression electronic indicator, and this electronic indicator is represented embodiments of the present invention 2.
Fig. 7 is the process flow diagram of expression treatment scheme.
Embodiment
Fig. 1 and Fig. 2 are the front elevation of the electronic indicator in the embodiments of the present invention 1 and the block diagram of expression structure.In addition, the demonstration under Fig. 1 (a) expression measured value display mode, (b) demonstration under the expression error connection line display mode.In addition, Fig. 3 is the normal line graph of three-phase 3 lines, and the polar plot when Fig. 4 is normal line, Fig. 5 are the tables of the demonstration under each connected mode in the presentation graphs 1 (b).
In Fig. 2, electronic indicator (being designated hereinafter simply as indicator) 100 roughly is divided into following part and constitutes, and measures operational part 51 that is:, and it carries out various computings based on the current/voltage from circuit 99 inputs; And display part 52, it shows the measured value of measuring operational part 51.Here, in display part 52, has display mode switching part 21 (also with reference to Fig. 1), by this display mode switching part 21 is operated, thereby show a certain in " measured value display mode " described later or " error connection line display mode " by display part 52.
In two kinds of display modes, " measured value display mode " is well-known.That is, shown in Fig. 1 (a),, show " current value ", " magnitude of voltage " and " charge value " based on electric current, voltage from foregoing circuit 99 inputs.In addition, if this moment be shown as normal line, promptly, as shown in Figure 3, be connected with the 1S1L terminal of indicator 100 at 1 current transformer of going up mutually 91 that is disposed at circuit 99, being disposed at 3 current transformers of going up mutually 92 is connected with the 3S3L terminal, the transformer 93 that is disposed between 1 phase and 2 phases is connected with the P1P2 terminal, the transformer 94 that is disposed between 2 phases and 3 phases is connected with the P2P3 terminal, and power factor be 1 and the state of balance under, then as can be known clear and definite according to Fig. 4, between V12 and the V32, between I1 and the I3, phase differential between V12 and the I1 is respectively " 60 ", " 120 ", " 30 ".
Above-mentioned " 60,120,30 " are main points of the present invention.That is, return Fig. 2 once more, in order to carry out above-mentioned measured value display mode, measure operational part 51 and be made of following part, that is: current detecting part 11, and it detects the electric current from circuit 99 inputs; Voltage detection department 12, it detects voltage in the same manner; Measured value operational part 13, it carries out computing according to detected current/voltage to various measured values; And phasing degree operational part 14, it carries out computing according to detected current/voltage to the phasing degree.
, be conceived to " 60,120,30 " once more here, the connected mode of three-phase 3 lines shown in Figure 3 as can be known, according to the quantity of current transformer 9192 and transformer 9394 and (together with shown in Figure 3 normally be connected in) reach 48.Specifically, can as Fig. 5 that following 3 kinds of situations are made up respectively, illustrate, that is:
The situation of transformer Miswire
In the line of current transformer, 1 phase and 3 wrong mutually situations
In the line of current transformer, the situation of its anisotropy.
At this moment, as can be known clear and definite from this Fig. 5, above-mentioned " phase differential between the phase differential between the phase differential between V12 and the V32, I1 and the I3, V12 and the I1 " in above-mentioned 48 connections except as normal " mode 1 " that connects, all is not " 60,120,30 ".
Promptly, in display part 52, has display mode switching part 21, by operating on it, in display part 52, show " error connection line display mode ", promptly, the three-phase display part 22 that will be made of V12-V32 phasing degree display part 22a, I1-I3 phasing degree display part 22b, V12-I1 phasing degree display part 22c shows shown in Fig. 1 (b) to know simply whether this connection is normal by whether being shown as " 60,120,30 ".And, because by contrast table shown in Figure 5, can also understand which position line that makes a mistake rapidly, so can expect to shorten this additional effect of reparation required time.
Be envisioned that when above-mentioned reparation is on for example being arranged at indicator switchboard and take place, but also often there is following situation: though this switchboard is three-phase 3 lines, but be used to judge whether that the load that normal connection is prepared is single-phase, that is, utilize single-phase load to implement the situation of test.In present embodiment 2, even be whether single-phase load also can to normally judging.In addition, Fig. 6 is the figure suitable with Fig. 2 of embodiments of the present invention 2, and Fig. 7 is the process flow diagram of expression treatment scheme.
As can be known clear and definite according to Fig. 6, in present embodiment 2, with respect to above-mentioned embodiment 1, additional input phase judegment part 15 in measuring operational part 51 adds 1 phase side display part, 23,3 phase side display parts 24 and shows automatic switchover portion 25 mutually in display part 52 respectively.Wherein, 1 phase (3 phase) side display part 23 (24) is formed by V12 (V32) display part 23a (24a), I1 (I3) display part 23b (24b), W1 (W3) display part 23c (24c).
At first, based on Fig. 7, the situation of utilizing threephase load to implement test is described.By display mode switching part 21 is operated, and switch to error connection line display mode (step 101) from the measured value display mode.Thus, utilize 15 pairs of input phase judegment parts whether to have the electric current input to judge (step 102) in the two mutually with 3 mutually 1.In the case, owing to be threephase load, show three-phase display part 22 by showing that mutually automatic switchover portion 25 is designated as.Below, according to the mode that embodiment 1 is recorded and narrated, by the phasing degree value of this demonstration, normally whether to connection is judged.
Then, owing to, be "No" in above-mentioned steps 102, so at first to whether having electric current input to judge (step 103) in mutually 1 utilizing single-phase load to implement under the situation of test.If electric current is arranged in mutually 1, then continue the power W1 that whether has 1 phase is judged (step 104), if having W1, that is, be considered as electric current, voltage mutually for 1 and all normally connect, then at the 1 phase side display part 23 that shows in the display part 52 shown in (a).In addition, here, under single-phase load and situation that 3 are connected, be transferred to step 105 from step 103, with 1 mutually situation in the same manner, the power W3 that whether has this 3 phase is judged (step 106), if having W3, then still at the 3 phase side display parts 24 that show in the display part 52 shown in (a).That is, to single-phase load with 1 mutually or 3 in mutually which be connected and judge, connect voltage, electric current and the power of the phase of side by showing it successively, can confirm normal connection.
On the other hand, existing under the situation of incorrect link, show in the following manner.That is, if in step 104, there is not W1, then in the case, think no problem, but exist unusually, specifically with being connected of transformer 93 with being connected of current transformer 91, transformer 93 and 94 is put upside down, at first, and at the 1 phase side display part 23 that shows in the display part 52 shown in (b).At this moment, yes with the "Yes" in the step 104 is prerequisite in this demonstration, but under the situation of this "Yes", also carry out the measurement of 3 phase sides at once, still at the 3 phase side display parts 24 (will import to 3 phase sides in the case) that show in the display part 52 shown in (b) from the voltage input of transformer 93.Thus, show above-mentioned 1 phase side display part 23 and 3 side display parts 24 mutually by circulation in display part 52, thereby, can be known as incorrect link based on this " circulation ".
For the judgement of above-mentioned incorrect link, recorded and narrated make single-phase load at first with 1 side situation about connecting mutually, even but also identical with the connection of 3 phase sides earlier.In addition, when arriving step 105 (, do not have the electric current input in 1 phase side), do not have in 3 phase sides under the situation of electric current input yet, by at " not having (the non) " display part 26 that shows in the display part 52 shown in (c), can know this situation that is not connected thus with any load.In addition, if because in case switch to the error connection line display mode, then with the connection of load or revise correspondingly, the displaying contents that automatically switches display part 52 (for example, switch to 1 phase side display part 23 from " not having (non) " display part 26), so can successfully confirm operation.
In present embodiment 2, by " circulation shows " and " not having (non) shows ", know that incorrect link is not connected with having, but the situation in for example current reversal input is inferior, at the 1 phase side display part 23 that shows in the display part 25 shown in (d), that is, and by in demonstration additional " negative sign ", thus, the operator can revise reverse input at once in this moment.
Claims (2)
1. electronic indicator is characterized in that having:
Measure operational part, it carries out computing according to electric current, the voltage from the circuit input to various measured values; And display part, it shows the measured value that calculates by this measurement operational part, in described measurement operational part, be provided with the phasing degree operational part that the phasing degree is carried out computing according to described electric current, voltage, and, be provided with the display mode switching part in described display part, it is used for switching to the measured value display mode that shows described measured value with based on the error connection line display mode of described phasing degree operational part.
2. electronic indicator according to claim 1 is characterized in that,
Additional input phase judegment part in described measurement operational part respectively, additional phase shows automatic switchover portion in described display part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-280069 | 2009-12-10 | ||
| JP2009280069A JP2011122907A (en) | 2009-12-10 | 2009-12-10 | Electronic indicating instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102095912A true CN102095912A (en) | 2011-06-15 |
Family
ID=44129086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102622082A Pending CN102095912A (en) | 2009-12-10 | 2010-08-23 | Electronic indicator |
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| Country | Link |
|---|---|
| JP (1) | JP2011122907A (en) |
| CN (1) | CN102095912A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808045A (en) * | 2014-01-27 | 2015-07-29 | 三菱电机株式会社 | Electronic indicating instrument |
| CN105988055A (en) * | 2014-10-07 | 2016-10-05 | 三菱电机株式会社 | Electric power measurement apparatus, and method for determining wire connection of AC circuit and electric power measurement apparatus |
| CN113050279A (en) * | 2019-12-26 | 2021-06-29 | 精工爱普生株式会社 | Display system, display method, and recording medium |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6138569A (en) * | 1984-07-31 | 1986-02-24 | Toshiba Corp | Electronic watthour meter |
| JP3229073B2 (en) * | 1993-06-16 | 2001-11-12 | 三菱電機株式会社 | Power detection device |
| JP2000258484A (en) * | 1999-03-10 | 2000-09-22 | Hioki Ee Corp | Connection state detector in power meter |
| JP2005287256A (en) * | 2004-03-30 | 2005-10-13 | Tm T & D Kk | Digital protecting and controlling device and its display data production method, and display data production program |
-
2009
- 2009-12-10 JP JP2009280069A patent/JP2011122907A/en active Pending
-
2010
- 2010-08-23 CN CN2010102622082A patent/CN102095912A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808045A (en) * | 2014-01-27 | 2015-07-29 | 三菱电机株式会社 | Electronic indicating instrument |
| CN104808045B (en) * | 2014-01-27 | 2018-04-13 | 三菱电机株式会社 | Electronic type indicating meter |
| CN105988055A (en) * | 2014-10-07 | 2016-10-05 | 三菱电机株式会社 | Electric power measurement apparatus, and method for determining wire connection of AC circuit and electric power measurement apparatus |
| CN113050279A (en) * | 2019-12-26 | 2021-06-29 | 精工爱普生株式会社 | Display system, display method, and recording medium |
| CN113050279B (en) * | 2019-12-26 | 2024-04-02 | 精工爱普生株式会社 | Display system, display method, and recording medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011122907A (en) | 2011-06-23 |
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Application publication date: 20110615 |