CN2702501Y - Three-phase AC biphase-sequence relay - Google Patents
Three-phase AC biphase-sequence relay Download PDFInfo
- Publication number
- CN2702501Y CN2702501Y CN 200420008278 CN200420008278U CN2702501Y CN 2702501 Y CN2702501 Y CN 2702501Y CN 200420008278 CN200420008278 CN 200420008278 CN 200420008278 U CN200420008278 U CN 200420008278U CN 2702501 Y CN2702501 Y CN 2702501Y
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- phase
- relay
- phase sequence
- circuit
- alternating current
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Abstract
The utility model relates to a three-phase alternating current (AC) biphase-sequence relay, belonging to the technical field of power supply detection. The phase-sequence relay is designed with a positive and a reverse two phase-sequence detection units and relay output units, distinguishing the output terminal of the positive phase-sequence relay and the output terminal of the reverse phase-sequence relay to extend the application area of the phase-sequence relay.
Description
Affiliated technical field
The phase sequence that the utility model relates to a kind of three-phase alternating current detects relay, and the phase sequence that belongs to alternating current detects
Technical field.
Background technology
General phase order of 3-phase AC detects judges the dependence phase sequence relay.It comprises one group of three-phase alternating current electrical input, one group of circuit work power that provides by step-down transformer, and a phase sequence detection cell circuit and a relay output circuit also comprise one group of relay output that detection signal externally is provided.When the power phase of ac input end just often, a pair of normally opened contact adhesive of this relay output, another disconnects normally-closed contact.When the phase sequence of ac input end was made mistakes, the state of this relay output was just identical with malfunction or power down mode, and promptly normally-closed contact is kept closed, and normally opened contact keeps off-state.For example extensively sold on the market in recent years and be put to practical XJ series phase sequence relay, came to this.
Of this sort single-phase preface relay protector also has a lot of open examples; be called a lot of patent applications of " phase failure and phase sequence relay " as name; for example application number be 00242820 and application number be 94219506 application; all just proposed in the basic Chu of phase sequence, to increase again the method for other function (for example phase failure protection function), perhaps difference to some extent on version only.More than these products or scheme in practice, all have limitation; especially in many production reality; when in the face of reversible control; the protection that quits work when such single-phase preface relay just can only be used for the three-phase alternating current misphase, thereby the control that equipment can normally move in the same old way when only adopting a phase sequence relay to be used as the power supply misphase just seems unable to do what one wishes.
Summary of the invention
Based on this reason, the utility model provides a kind of two-phase preface relay of three-phase alternating current, to fill up the blank of having only single-phase preface relay protector on the present market.Also for produce the reversible control system of motor in the reality provide a kind of can simplified design, preferred circuit element that again can safe and reliable operation.
Technical solution adopted in the utility model is: two cover phase sequences is installed in same housing detects relay units, may phase sequences in order to detect two kinds of alternating current respectively, and externally export by separate relay respectively.Their the work energy is then taken from the low-tension supply that same transformer provides.
The beneficial effects of the utility model are to expand the usage range of phase sequence relay, can make handy simplified design to the reversible control system of three phase alternating current motor especially.
The technical program is achieved in that designing two cover phase sequences in common single-phase preface relay protector simultaneously detects relay unit, and promptly the positive phase sequence of a cover three-phase alternating current detects relay unit and negative phase sequence detection relay unit.Two phase sequence detection relay units are being controlled each two pairs separately respectively and are independently often being opened output contact.When the alternating current phase sequence of power supply was positive phase sequence, positive phase sequence detected two pairs of contacts adhesive simultaneously that relay unit is controlled, and this moment, negative phase sequence detected two pairs of not adhesives of contact that relay unit is controlled.When the alternating current phase sequence of power supply was negative phase sequence, negative phase sequence detected two pairs of contacts adhesive simultaneously that relay unit is controlled, and this moment, positive phase sequence detected two pairs of not adhesives of contact that relay unit is controlled.The technical characterictic of this scheme is: the detection and the relay output function that 1, possess two kinds of phase negative-phase sequences of alternating current; 2, two phase sequence detecting units adopt each electromagnetic relay output, and each relay should provide independently, the outlet terminal of at least two pairs of relay normally opened contacts; 3, on internal structure, the working power of all internal circuits is taken from same step-down transformer.
Description of drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Numeral number among the figure is represented a certain function element or a certain functional unit, is described as follows:
The input terminal of three-phase alternating current (1), step-down transformer and DC power-supply circuit (2), positive phase sequence detects and signal amplification unit circuit (3), positive phase sequence relay output circuit (4), negative phase sequence detects and signal amplification unit circuit (6), negative phase sequence relay output circuit (7), the normal opened contact terminals (5) of suitable, contrary relay output.
Containing order and backward testing circuit (3), (6) and relay output circuit (4) and (7) simultaneously, is first technical characterictic of the present utility model.Having separate, order and at least two electromagnetic type relays output of backward normal opened contact terminals (5), is second technical characterictic of the present utility model.And adopt same power supply (2) to provide working power to all circuit, then be the 3rd technical characterictic of the present utility model.
Embodiment
Figure of description also is a specific embodiments schematic diagram of the present utility model.When the alternating current phase sequence of input was positive phase sequence, positive phase sequence detected and signal amplification unit circuit (3) has detection signal output, and by relay output circuit (4), makes it be contained in output point (J1) and (J2) adhesive in (5).This moment, another negative phase sequence detection relay unit (6) and (7) did not then have detection signal output, its contact controlled (J3) and (J4) yet just not adhesive.On the contrary, when the alternating current phase sequence of input was negative phase sequence, negative phase sequence detected and signal amplification unit circuit (6) has detection signal output, and by relay output circuit (7), makes it be contained in output point (J3) and (J4) adhesive in (5).This moment, another positive phase sequence detection relay unit (3) and (4) did not then have detection signal output, its contact controlled (J1) and (J2) yet just not adhesive.Among the figure, the working power of the internal circuit (3) of two-phase preface relay, (4) and (6), (7) is all provided by the low-voltage power supply that contains a step-down transformer (2).
Positive phase sequence among the figure and negative phase sequence testing circuit are selected a class circuit that does not have the output of detecting when possessing the three-phase alternating current phase shortage for use, so that all relay open type output contacts are all disconnected.
Claims (3)
1. three-phase alternating current two-phase preface relay comprises three-phase input end, circuit of testing the phase sequence and the relay output circuit of housing, alternating current; Of the present utility model being characterised in that: adopt two cover circuit of testing the phase sequence and relay output circuits thereof, and a cover circuit of testing the phase sequence wherein is used for the positive phase sequence of alternating current is detected judgement, and positive phase sequence is judged that signal externally exports by relay output circuit and relay output; An other cover circuit of testing the phase sequence wherein is used for the negative phase sequence of alternating current is detected judgement, and negative phase sequence is judged that signal externally exports by relay output circuit and relay output.
2, two-phase preface relay as claimed in claim 1, feature is: the external detection output form of positive and negative two kinds of phase sequences adopts an electromagnetic relay output respectively, and this relay can externally provide the terminals of two pairs of separate open type output contacts at least.
3, two-phase preface relay as claimed in claim 1, feature is: the working power of all internal circuits is taken from same step-down transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420008278 CN2702501Y (en) | 2004-03-17 | 2004-03-17 | Three-phase AC biphase-sequence relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420008278 CN2702501Y (en) | 2004-03-17 | 2004-03-17 | Three-phase AC biphase-sequence relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2702501Y true CN2702501Y (en) | 2005-05-25 |
Family
ID=34768072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420008278 Expired - Fee Related CN2702501Y (en) | 2004-03-17 | 2004-03-17 | Three-phase AC biphase-sequence relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2702501Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495297A (en) * | 2011-12-09 | 2012-06-13 | 辽宁省电力有限公司沈阳供电公司 | Method for realizing phase check function by relay contact |
| CN103595037A (en) * | 2013-10-22 | 2014-02-19 | 澳柯玛股份有限公司 | Three-phase alternating current phase sequence error correction device |
-
2004
- 2004-03-17 CN CN 200420008278 patent/CN2702501Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495297A (en) * | 2011-12-09 | 2012-06-13 | 辽宁省电力有限公司沈阳供电公司 | Method for realizing phase check function by relay contact |
| CN102495297B (en) * | 2011-12-09 | 2014-10-22 | 辽宁省电力有限公司沈阳供电公司 | Method for realizing phase check function by relay contact |
| CN103595037A (en) * | 2013-10-22 | 2014-02-19 | 澳柯玛股份有限公司 | Three-phase alternating current phase sequence error correction device |
| CN103595037B (en) * | 2013-10-22 | 2016-05-25 | 澳柯玛股份有限公司 | Three-phase alternating current phase sequence error correction device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |