CN1412907A - Phase fault, low-voltage and over voltage breaking protection circuit - Google Patents
Phase fault, low-voltage and over voltage breaking protection circuit Download PDFInfo
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- CN1412907A CN1412907A CN 01128945 CN01128945A CN1412907A CN 1412907 A CN1412907 A CN 1412907A CN 01128945 CN01128945 CN 01128945 CN 01128945 A CN01128945 A CN 01128945A CN 1412907 A CN1412907 A CN 1412907A
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Abstract
The present invention relates to a phase fault, under-voltage and over-voltage break protection circuiot for protecting main circuit and its load. Said protection circuit includes the power transfer circuit capable of transferring the control power source into output end of switch contact of main circuit from input end of switch contact of main circuit and over-voltage and under-voltage relay circuit. The over-voltage and under-voltage relay circuit is is formed from over-voltage relay and under-voltage relay which are series-connected and a short circuit capable of making the under-voltage relay conduct and pick up.
Description
The present invention relates in a kind of main circuit running, be used for phase shortage, under-voltage, the overvoltage breaking protection circuit of main circuit and payload security thereof protection.
In the main circuit running; situations such as Shi Changhui phase shortage occurs, owes phase, overvoltage; this normal operation to circuit load especially motor can produce considerable influence, thus in actual moving process to main circuit carry out phase shortage, under-voltage, overvoltage protection seems very necessary.Though existing many protective circuits to the phase shortage of main circuit, under-voltage, cross pressure energy and play a protective role, owing to its protective circuit complex structure and cost is higher that it is not easy to obtain with popularization and application.
The purpose of this invention is to provide a kind of phase shortage, under-voltage, overvoltage breaking protection circuit; when the situation of phase shortage, under-voltage, overvoltage takes place in the main circuit running; can be to main circuit and load thereof; particularly motor plays the effect of safeguard protection, and protective circuit is simple in structure, cost is low and be easy to popularization and application.
The object of the present invention is achieved like this: this phase shortage, under-voltage, overvoltage breaking protection circuit comprise a control power supply switch circuit, and it will control power supply switches to the main circuit switch contact from the input of main circuit switch contact output; This protective circuit also comprises under-voltage, an overvoltage relay circuit, with one the short-circuit of under-voltage relay energising adhesive is constituted after it is connected with under-voltage relay by overvoltage relay.
Phase shortage of the present invention, under-voltage, overvoltage breaking protection circuit; owing in its circuit, be provided with an A.C. contactor or circuit breaker; and under-voltage, overvoltage relay; it in running the output that the control power supply is switched to the main circuit switch contact from the input of the switch contact of main circuit; the circuit phase shortage that causes when reasons such as the switch contact loose contact occur and because the circuit that voltage fluctuation causes is under-voltage, during overvoltage, can cut off the electricity supply and realize phase shortage, under-voltage, over-voltage protecting function.This protective circuit is simple in structure, and reliable operation is with low cost, is easy to popularization and application.
Now in conjunction with the accompanying drawings the present invention is described in further detail.
Fig. 1 is phase shortage of the present invention, under-voltage, overvoltage breaking protection circuit with " sequential contact " circuit structure diagram when mode realizes goal of the invention; Fig. 2 is phase shortage of the present invention, under-voltage, overvoltage breaking protection circuit with " interlock button " circuit structure diagram when mode realizes goal of the invention; Fig. 3 is phase shortage of the present invention, under-voltage, overvoltage breaking protection circuit with " circuit breaker " circuit structure diagram when mode realizes goal of the invention; Fig. 4, Fig. 5 are phase shortage of the present invention, under-voltage, overvoltage breaking protection circuit with " time relay " circuit structure diagram when mode realizes goal of the invention.
As shown in Figure 1, this phase shortage, under-voltage, overvoltage breaking protection circuit comprise a control power supply switch circuit, and it will control power supply switches to the main circuit switch contact from the input of main circuit switch contact output; This protective circuit also comprises under-voltage, an overvoltage relay circuit, and it constitutes the short-circuit of under-voltage relay Q energising adhesive by overvoltage relay G, under-voltage relay Q series connection back and.Wherein control power supply switch circuit and close auxilliary contact by one group of parallel connection of the contact of A.C. contactor S by under-voltage, overvoltage relay and A.C. contactor S moving disconnected, moving and connect, moving disconnected, moving the closing of this parallel connection is assisted the contact cross-over connection in input, the output of the main contacts of A.C. contactor S.The overvoltage relay G output that back one is terminated at A.C. contactor S one main contacts of connecting with under-voltage relay Q, in parallel moving disconnected, moving of another group of the other end and A.C. contactor S closed auxilliary contact and connects, the moving disconnected, moving of this parallel connection closed auxilliary contact cross-over connection in input, the output of A.C. contactor S one main contacts, and start button QA reaches the main contacts parallel connection that is connected with overvoltage relay G with overvoltage relay G.
During startup, press start button QA, under-voltage relay Q switches on adhesive and connects A.C. contactor S, its main contacts closure; Disconnect start button QA, under-voltage relay Q keeps adhesive by the main contacts output through the energising of overvoltage relay G dividing potential drop, and A.C. contactor S is by the power supply of main contacts output, and motor D starts.At the motor D run duration, if main contacts loose contact and phase shortage occurs lacks B phase, then A.C. contactor S decompression; Lack A phase or C phase, the then under-voltage release of under-voltage relay Q, A.C. contactor S decompression.If line under-voltage or overvoltage, then under-voltage release of under-voltage relay Q or overvoltage relay G overvoltage adhesive, A.C. contactor S decompression and deenergization, motor D is out of service.
As shown in Figure 2, this phase shortage, under-voltage, overvoltage breaking protection circuit comprise a control power supply switch circuit, and it will control power supply switches to the main circuit switch contact from the input of main circuit switch contact output; This protective circuit also comprises under-voltage, an overvoltage relay circuit, and it constitutes the short-circuit of under-voltage relay Q energising adhesive by overvoltage relay G, under-voltage relay Q series connection back and.Wherein control power supply switch circuit and be connected with the output of the main contacts of AC relay S by contact under-voltage, overvoltage relay, and be connected with the input of this main contacts by start button QA by A.C. contactor S.After overvoltage relay G and the under-voltage relay Q series connection, one is terminated at the output of A.C. contactor S one main contacts, the other end is connected to the output of another main contacts of A.C. contactor S, and start button QA is an interlock button, with overvoltage relay G and the main contacts parallel connection that is connected with overvoltage relay G.
During startup, press interlock button QA, A.C. contactor S connects, its main contacts closure, the adhesive of under-voltage relay Q energising simultaneously; Disconnect QA, under-voltage relay Q keeps adhesive by the main contacts output through the energising of overvoltage relay G dividing potential drop, and A.C. contactor S is by the power supply of main contacts output, and motor D starts.At the motor D run duration, if main contacts loose contact and phase shortage occurs lacks C phase, then A.C. contactor S decompression; Lack A phase or B phase, the then under-voltage release of under-voltage relay Q, A.C. contactor S decompression.If line under-voltage or overvoltage, then under-voltage release of under-voltage relay Q or overvoltage relay G overvoltage adhesive, A.C. contactor S decompression and deenergization, motor D is out of service.
As shown in Figure 3, this phase shortage, under-voltage, overvoltage breaking protection circuit comprise a control power supply switch circuit, and it will control power supply switches to the main circuit switch contact from the input of main circuit switch contact output; This protective circuit also comprises under-voltage, an overvoltage relay circuit, and it constitutes the short-circuit of under-voltage relay Q energising adhesive by overvoltage relay G, under-voltage relay Q series connection back and.Wherein control the opening and closing realization of power supply switch circuit by external force control circuit breaker H plug-in strip.Output at circuit breaker H main contacts is pressed delta connection with two under-voltage relay Q and an overvoltage relay G, and the auxilliary contact of circuit breaker H is in parallel with overvoltage relay G.
During startup, with external force close circuit breaker H, its main contacts closure and starter motor D.At the motor D run duration, if phase shortage, under-voltage, then under-voltage relay Q occur
1, Q
2Discharge, overvoltage occurs, then overvoltage relay G adhesive makes the trip coil energising adhesive of circuit breaker H, causes detaining Ka Tuoka and deenergization, and motor D is out of service.
As Fig. 4, shown in Figure 5, this phase shortage, under-voltage, overvoltage breaking protection circuit comprise a control power supply switch circuit, and it will control power supply switches to the main circuit switch contact from the input of main circuit switch contact output; This protective circuit also comprises under-voltage, an overvoltage relay circuit, and it constitutes the short-circuit of under-voltage relay Q energising adhesive by overvoltage relay G, under-voltage relay Q series connection back and.Also has a time relay in the protective circuit, by capacitor C
3Be formed by connecting with a voltage multiplying rectifier power supply E or thyristor synchronous triggering D.C. regulated power supply F again after relay LC is in parallel.Described control power supply switch circuit is to be connected with the main contacts output of A.C. contactor S by contact under-voltage, overvoltage relay by A.C. contactor S, and is connected with the input of this main contacts by a contact of the time relay.After overvoltage relay G and the under-voltage relay Q series connection, one is terminated at the output of A.C. contactor S one main contacts, the other end is connected to the output of another main contacts of A.C. contactor S, and a contact of the time relay reaches the main contacts parallel connection that is connected with overvoltage relay G with overvoltage relay G.
During startup, press start button QA, relay LC is by capacitor C
1Power and adhesive, disconnect QA, relay LC is by capacitor C
2Power supply is because capacitor C
2Capacity is too small, capacitor C
3Be discharged to the delay time of adjusting, relay LC discharges because of under-voltage.After relay LC discharged, control circuit was by the output power supply of main contacts.If phase shortage, under-voltage, overvoltage, then A.C. contactor S discharges and cuts off the electricity supply.
Claims (6)
1, a kind of phase shortage, under-voltage, overvoltage breaking protection circuit is characterized in that: 1), this protective circuit comprise one control power supply switch circuit, it will control power supply switches to the main circuit switch contact from the input of main circuit switch contact output; 2), this protective circuit also comprises under-voltage, an overvoltage relay circuit, it constitutes the short-circuit of under-voltage relay Q energising adhesive by overvoltage relay G, under-voltage relay Q series connection back and.
2, phase shortage according to claim 1, under-voltage, overvoltage breaking protection circuit, 1), described control power supply switch circuit is to close auxilliary contact by one group of parallel connection of the contact of A.C. contactor S by under-voltage, overvoltage relay and A.C. contactor S moving disconnected, moving connect it is characterized in that:, moving disconnected, moving the closing of this parallel connection is assisted the contact cross-over connection in input, the output of the main contacts of A.C. contactor S; 2), the overvoltage relay G output that back one is terminated at A.C. contactor S one main contacts of connecting with under-voltage relay Q, in parallel moving disconnected, moving of another group of the other end and A.C. contactor S closed auxilliary contact and connects, the moving disconnected, moving of this parallel connection closed auxilliary contact cross-over connection in input, the output of A.C. contactor S one main contacts, and start button QA reaches the main contacts parallel connection that is connected with overvoltage relay G with overvoltage relay G.
3, phase shortage according to claim 1, under-voltage, overvoltage breaking protection circuit, 1), described control power supply switch circuit is to be connected with the output of the main contacts of AC relay S by contact under-voltage, overvoltage relay by A.C. contactor S it is characterized in that:, and be connected with the input of this main contacts by start button QA; 2), after overvoltage relay G and the under-voltage relay Q series connection, one is terminated at the output of A.C. contactor S one main contacts, the other end is connected to the output of another main contacts of A.C. contactor S, and start button QA is an interlock button, reaches the main contacts parallel connection that is connected with overvoltage relay G with overvoltage relay G.
1), described control power supply switch circuit is that opening and closing by external force control circuit breaker H plug-in strip realize 4, phase shortage according to claim 1, under-voltage, overvoltage breaking protection circuit is characterized in that:; 2), at the output of circuit breaker H main contacts with two under-voltage relay Q and an overvoltage relay G by delta connection, and the auxilliary contact of circuit breaker H is in parallel with overvoltage relay G.
5, phase shortage according to claim 1, under-voltage, overvoltage breaking protection circuit, 1), also have a time relay in the protective circuit it is characterized in that:, described control power supply switch circuit is to be connected with the main contacts output of A.C. contactor S by contact under-voltage, overvoltage relay by A.C. contactor S, and is connected with the input of this main contacts by a contact of the time relay; 2), after overvoltage relay G and the under-voltage relay Q series connection, one is terminated at the output of A.C. contactor S one main contacts, the other end is connected to the output of another main contacts of A.C. contactor S, and a contact of this time relay reaches the main contacts parallel connection that is connected with overvoltage relay G with overvoltage relay G.
6, phase shortage according to claim 5, under-voltage, overvoltage breaking protection circuit, it is characterized in that: the described time relay is by capacitor C
3After relay LC was in parallel, (E, F) was formed by connecting with a direct current power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011289457A CN100477436C (en) | 2001-10-12 | 2001-10-12 | Phase fault, low-voltage and over voltage breaking protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011289457A CN100477436C (en) | 2001-10-12 | 2001-10-12 | Phase fault, low-voltage and over voltage breaking protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1412907A true CN1412907A (en) | 2003-04-23 |
| CN100477436C CN100477436C (en) | 2009-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011289457A Expired - Fee Related CN100477436C (en) | 2001-10-12 | 2001-10-12 | Phase fault, low-voltage and over voltage breaking protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100477436C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440668C (en) * | 2004-04-14 | 2008-12-03 | 余彦中 | Output circuit device of self-controlled breaking protective signal relay |
| CN102044860A (en) * | 2009-10-09 | 2011-05-04 | 蒙斯特电缆产品公司 | Improved tri-mode over-voltage protection and disconnect circuit apparatus and method |
| CN106026029A (en) * | 2016-08-12 | 2016-10-12 | 张型春 | Open-phase protection device for three-phase motor |
| CN106849014A (en) * | 2017-03-23 | 2017-06-13 | 马鞍山工蜂智能科技有限公司 | A kind of motor safety controls circuit system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4825328A (en) * | 1987-06-12 | 1989-04-25 | Watsco Components, Inc. | Three phase electrical load protection device |
| CN2105131U (en) * | 1991-11-02 | 1992-05-20 | 刘守泉 | Protector for phase loss, overvoltage and undervltage of 3-phase motor |
| CN2169237Y (en) * | 1993-08-17 | 1994-06-15 | 李书成 | Automatic protector for three phase asynchronous motor |
| CN2179652Y (en) * | 1993-12-21 | 1994-10-12 | 许万军 | Automatic compensation protector for motor |
| CN2273049Y (en) * | 1995-11-03 | 1998-01-21 | 郭酉茂 | Multifunctional protective switch for electric appliances |
| CN2306603Y (en) * | 1997-07-23 | 1999-02-03 | 路术春 | Phase interruption protector for AC motor |
| CN2338901Y (en) * | 1998-07-06 | 1999-09-15 | 徐良斌 | Phase interruption protection device for three phase asynchronous motor |
-
2001
- 2001-10-12 CN CNB011289457A patent/CN100477436C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440668C (en) * | 2004-04-14 | 2008-12-03 | 余彦中 | Output circuit device of self-controlled breaking protective signal relay |
| CN102044860A (en) * | 2009-10-09 | 2011-05-04 | 蒙斯特电缆产品公司 | Improved tri-mode over-voltage protection and disconnect circuit apparatus and method |
| CN102044860B (en) * | 2009-10-09 | 2016-01-06 | 蒙斯特电缆产品公司 | The three-mode overvoltage protection improved and open circuit equipment and method |
| CN106026029A (en) * | 2016-08-12 | 2016-10-12 | 张型春 | Open-phase protection device for three-phase motor |
| CN106026029B (en) * | 2016-08-12 | 2018-06-29 | 张型春 | A kind of threephase motor phase-lacking protective device |
| CN106849014A (en) * | 2017-03-23 | 2017-06-13 | 马鞍山工蜂智能科技有限公司 | A kind of motor safety controls circuit system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100477436C (en) | 2009-04-08 |
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Granted publication date: 20090408 Termination date: 20111012 |