CN2622897Y - Output circuit device of self-controlled cut-off protective signal relay - Google Patents
Output circuit device of self-controlled cut-off protective signal relay Download PDFInfo
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- CN2622897Y CN2622897Y CN 03234757 CN03234757U CN2622897Y CN 2622897 Y CN2622897 Y CN 2622897Y CN 03234757 CN03234757 CN 03234757 CN 03234757 U CN03234757 U CN 03234757U CN 2622897 Y CN2622897 Y CN 2622897Y
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Abstract
The utility model provides an output circuit device of self-controlled cut-off protective signal relay, which is used to protect the circuit and the load in case of cut-off of the main circuit due to open-phase, undervoltage and overvoltage. The utility model consists of an overvoltage relay and an undervoltage relay arranged in series, and a circuit constituted by a temporary undervoltage relay pulled in the short-circuit overvoltage relay. The circuit device used in self-controlled cut-off protective circuit is capable to protect the main circuit and the load, especially in cases of open-phase, undervoltage and overvoltage of the motor, and is convenient to introduce external signals such as overcurrent, leakage, etc, to shut off the circuit.
Description
Technical field
The utility model relates to and a kind ofly is used for protective circuit and load thereof because of phase shortage, under-voltage, self-controlled circuir break protective signal relay output circuit device that overvoltage disconnects the self-controlled circuit break protective circuit of main circuit.
Technical background
Existing main circuit breaking protection circuit, then defencive function is incomplete to adopt relay, and then cost is higher to adopt electronic circuit, and the circuit complexity, and volume is big, makes it be difficult for popularization and application.
Summary of the invention
The purpose of this utility model provides a kind of self-controlled circuir break protective signal relay output circuit device that is used for self-controlled circuit break protective circuit; when phase shortage, under-voltage, overpressure situation take place in the main circuit running; can be to main circuit and load thereof; particularly motor plays the open circuit protection effect; and be convenient to introduce various sensitive signals and carry out open circuit protection, be that a kind of function is complete, simple structure, be easy to the self-controlled circuit break protective circuit device of popularization and application.
Summary of the invention
The purpose of this utility model is achieved in that this automatic control output circuit device adopts overvoltage relay back and of connect with under-voltage relay temporarily to make the switch on circuit of short circuit overvoltage relay of adhesive of under-voltage relay; perhaps adopt the voltage multiplying rectifier power supply of the control overvoltage relay back of connect with the voltage multiplying rectifier power supply of control under-voltage relay to switch on so that the short circuit of under-voltage relay adhesive is controlled the circuit of the voltage multiplying rectifier power supply of overvoltage relay with a temporary transient voltage multiplying rectifier power supply of control under-voltage relay that makes; starting switch in the sort circuit is through temporary transient the connection and after disconnecting; overvoltage relay enters operating state; after being activated, under-voltage relay enters operating state, when main circuit occurs under-voltage; output open circuit protection switching signal during overvoltage.Concrete scheme is as follows:
Self-controlled circuir break protective signal relay output circuit device is characterized in that adopting AC relay to pick up circuir break protective signal and exports the open circuit protection switching signal, and it is by overvoltage relay g and under-voltage relay q
1Series connection, starting switch Kq one is terminated at g, q
1Node, the other end makes Kq short circuit g so that q
1The energising adhesive.This situation is that another A.C. contactor by pull-in winding control is adopted by AC relay control two-phase.
Another kind of self-controlled circuir break protective signal relay output circuit device is on the basis of basic structure in front, control two-phase by direct current relay: 1) adopt direct current relay to pick up circuir break protective signal and export the open circuit protection switching signal, it is with the load of overvoltage relay g as the voltage multiplying rectifier power supply, shunt resistance Rg in parallel with g forms multiplication of voltage overvoltage relay G in order to proofread and correct overpressure value; With under-voltage relay q
1As the load of another voltage multiplying rectifier power supply, with q
1Shunt resistance Rg in parallel is in order to proofread and correct under-voltage value, with q
1Be parallel with the triode T of current-limiting resistance
qIn order to introduce the extraneous signal control of opening circuit, formation multiplication of voltage under-voltage relay Q
12) by above-mentioned multiplication of voltage overvoltage relay G and multiplication of voltage under-voltage relay Q
1Series connection, starting switch Kq one is terminated at G, Q
1Node, the other end makes Kq short circuit G so that Q
1The energising adhesive.
On the basis of first kind of base case,, following dual mode is arranged in order to realize controlling three-phase:
The one, increase under-voltage relay q
2, overvoltage relay g, under-voltage relay q
1With under-voltage relay q
2Press star connection, Y connection, starting switch Kq one is terminated at asterism, and the other end makes Kq short circuit g so that q
1And q
2The energising adhesive.
The 2nd, increase under-voltage relay q
2And q
3, by overvoltage relay g and under-voltage relay q
3Series connection, q
3Be connected to asterism and under-voltage relay q
1., under-voltage relay q
2Constitute star connection, Y connection, starting switch Kq one is terminated at g, q
3Node, the other end makes Kq short circuit g so that q
1, q
2, q
3The energising adhesive.
In like manner, on the basis of second kind of scheme,, following dual mode is arranged also in order to realize controlling three-phase:
The one, increase multiplication of voltage under-voltage relay Q
2, this autocontrol relay output circuit device is by multiplication of voltage overvoltage relay G, multiplication of voltage under-voltage relay Q
1, multiplication of voltage under-voltage relay Q
2Press star connection, Y connection, starting switch Kq one is terminated at asterism, the other end make the Kq short circuit in G so that Q
1, Q
2The energising adhesive.
The 2nd, increase multiplication of voltage under-voltage relay Q
2And Q
3, this autocontrol relay output circuit device is by multiplication of voltage overvoltage relay G and multiplication of voltage under-voltage relay Q
3Series connection, Q
3Be connected to asterism after the short circuit coupling capacitance, with multiplication of voltage under-voltage relay Q
1, multiplication of voltage under-voltage relay Q
2Constitute star connection, Y connection, starting switch Kq one is terminated at G, Q
3Node, the other end makes Kq short circuit G so that Q
1, Q
2, Q
3The energising adhesive.
Starting switch Kq in this autocontrol relay output circuit device is the time-delay cut-off switch. preferably Kq is a time relay contact switch, by direct current relay Z, capacitor C
2The LC relay that constitutes in parallel is as the time relay.Perhaps, starting switch Kq is an electronic switch, and electronic switch is by capacitor C
1Parallel resistance R
1Back and diode T
1Series connection constitutes unidirectional charging circuit, capacitor C
2Parallel resistance R
2Back and diode T
2Series connection constitutes another unidirectional charging circuit, constitutes capacitance switch by rightabout two unidirectional charging circuit parallel connections again.Capacitor C in the electronic switch
1, C
2Also can be with the charge triode T of conducting of base stage
3, T
4Replace, form triode switch.
The utility model is used for the self-controlled circuit break protective circuit device; this circuit arrangement and control power supply switch circuit and switching circuit are constituted the self-controlled circuit break protective circuit device jointly; it in running the output that the control power supply is switched to the main circuit switch contact from the input of main circuit switch contact; when causing the circuit phase shortage, reasons such as the switch contact loose contact occur comprises that single phase poaer supply scarce " fire " lacks " zero " or voltage fluctuation causes that circuit is under-voltage; during overpressure situation; can cut off the electricity supply and realize the main circuit break protecting; and be convenient to introduce overload; extraneous signals such as electric leakage carry out open circuit protection; defencive function is complete; cost is low, is easy to popularization and application.
This circuit arrangement is equivalent to " self-controlled circuir break protective signal output circuit " (number of patent application 01145594.2) integrated circuit; can be by a plurality of relays and being integral of enclosure group relay circuit thereof; also can form relay circuit by resolution element; under-voltage relay wherein, overvoltage relay can be miniature relays, also can be midget relaies.
Description of drawings
Fig. 1 is by AC relay control two-phase, another self-controlled circuir break protective signal relay output circuit structure drawing of device that A.C. contactor adopted by pull-in winding control;
Fig. 2 is by direct current relay control two-phase, another self-controlled circuir break protective signal relay output circuit structure drawing of device that A.C. contactor adopted by pull-in winding control, also can be used as the self-controlled circuir break protective signal relay output circuit structure drawing of device that the control single-phase circuit breaker comprises earth leakage circuit-breaker;
Fig. 3, Fig. 4, Fig. 5, Fig. 6 are the self-controlled circuir break protective signal relay output circuit structure drawing of device of the may command three-phase that adopts of A.C. contactor or circuit breaker;
Fig. 7 is the circuit structure diagram of the time relay that starting switch adopted in the self-controlled circuir break protective signal relay output circuit device;
Fig. 8, Fig. 9 are the circuit structure diagrams of the electronic switch that starting switch adopted in the self-controlled circuir break protective signal relay output circuit device;
Figure 10 is that self-controlled circuir break protective signal relay output circuit device is used for A.C. contactor, after start button disconnects and self fail before the operate as normal by switching the circuit structure diagram that the pull-in winding loop is connected in continuation in short-term in the contact;
Figure 11 is that self-controlled circuir break protective signal relay output circuit device is used for snap close energy-saving alternating current device, the control circuit structure chart of tripping coil;
Figure 12, Figure 13 are the control circuit structure charts that self-controlled circuir break protective signal relay output circuit device is used for remanent magnetism energy-saving alternating current contactor pull-in winding.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing:
In Fig. 1, overvoltage relay g and under-voltage relay q
1Series connection, starting switch Kq one is terminated at g, q
1Node, the other end makes Kq short circuit g so that q
1The energising adhesive.
The operation principle of Fig. 1 is: by " phase shortage. under-voltage overvoltage breaking protection circuit " patented technology (application number 01128945.7) is used for A.C. contactor, is connected on the under-voltage relay contact switch q in the pull-in winding loop when phase shortage, under-voltage, overvoltage appear in main circuit
1` or overvoltage relay contact switch g` disconnect and the disconnection main circuit.
In Fig. 2, overvoltage relay g is as the load of voltage multiplying rectifier power supply, and overpressure value---call this circuit structure in the following text is " multiplication of voltage overvoltage relay " G to shunt resistance Rg in parallel with g in order to proofread and correct; Under-voltage relay q
1As the load of another voltage multiplying rectifier power supply, with q
1Shunt resistance Rq in parallel is in order to proofread and correct under-voltage value, with q
1The triode Tq that is parallel with current-limiting resistance is in order to introduce the extraneous signal control of opening circuit---call " multiplication of voltage under-voltage relay " Q in the following text
1, multiplication of voltage overvoltage relay G, multiplication of voltage under-voltage relay Q
1Represent with illustrated symbol; Multiplication of voltage overvoltage relay G and multiplication of voltage under-voltage relay Q
1Series connection, starting switch Kq one is terminated at G, Q
1Node, the other end makes Kq short circuit G so that Q
1The energising adhesive.
The operation principle of Fig. 2 is identical with Fig. 1.Adopt direct current relay to replace AC relay, can also introduce extraneous signal and control, its principle is: extraneous signal acts on triode Tq and causes multiplication of voltage under-voltage relay Q
1Under-voltage and output road protection switch signal disconnects main circuit.
In Fig. 3, overvoltage relay g, under-voltage relay q
1, under-voltage relay q
2Press star connection, Y connection, starting switch Kq one is terminated at asterism, and the other end makes Kq short circuit g so that q
1, q
2The energising adhesive.
Fig. 3 has increased a under-voltage relay q on the basis of Fig. 1
2, its operation principle is identical with Fig. 1.
In Fig. 4, overvoltage relay g and under-voltage relay q
3Series connection, q
3One is terminated at asterism and under-voltage relay q
1, under-voltage relay q
2Constitute star connection, Y connection, starting switch Kq one is terminated at g, q
3Node, the other end makes Kq short circuit g so that q
1, q
2, q
3The energising adhesive.
Fig. 4 has increased a under-voltage relay q on the basis of Fig. 3
3, its operation principle is identical with Fig. 3.
In Fig. 5, multiplication of voltage overvoltage relay G, multiplication of voltage under-voltage relay Q
1, multiplication of voltage under-voltage relay Q
2Connect by the star star, starting switch Kq one is terminated at asterism, and the other end makes Kq short circuit G so that Q
1, Q
2The energising adhesive.
Fig. 5 has increased a multiplication of voltage under-voltage relay Q on the basis of Fig. 2
2, its operation principle is identical with Fig. 2.
In Fig. 6, multiplication of voltage overvoltage relay G and multiplication of voltage under-voltage relay Q
3Series connection, Q
3Be connected to asterism and multiplication of voltage under-voltage relay Q after the short circuit coupling capacitance
1, multiplication of voltage under-voltage relay Q
2Constitute star connection, Y connection, starting switch Kq one is terminated at asterism, and the other end makes Kq short circuit G so that Q
1, Q
2, Q
3The energising adhesive.
Fig. 6 has increased a multiplication of voltage under-voltage relay Q on the basis of Fig. 5
3, its operation principle is identical with Fig. 5.
In Fig. 7, direct current relay Z, capacitor C parallel connection become a time relay---and call " LC relay " in the following text, and represent with illustrated symbol, this figure then claims LC relay Z.Make contact among the LC relay Z is in order to replace the starting switch Kq that time-delay disconnects in the self-controlled circuir break protective signal relay output circuit device, under-voltage relay q
1, q
2, q
3In make contact, the series connection of the break contact of overvoltage relay g, comprise with A.C. contactor " start---operation " during the power supply double-throw contact in the pull-in winding loop back power supply switch circuit (not illustrating) in order to pull-in winding loop during the start button switch that replaces A.C. contactor pull-in winding loop and the replacement " startup--move " in parallel of connect with another make contact among the LC relay Z.
The operation principle of Fig. 7 is: the start button that the start button of A.C. contactor is used as the LC relay, the start button switch of former A.C. contactor replaces with the make contact among the LC relay Z, another make contact of LC relay Z replaces starting switch Kq, when the LC relay starts, capacitor C
ZCharging, behind the disconnection LC relay power, capacitor C
ZDischarge is as the power supply of keeping of LC relay Z; in this course; under-voltage relay in the self-controlled circuir break protective signal relay output circuit starts; LC relay end-of-job subsequently; starting switch disconnects; self-controlled circuir break protective signal relay output circuit operate as normal is by under-voltage relay q
1, q
2, q
3In make contact, the pull-in winding loop that the break contact among the overvoltage relay g is controlled A.C. contactor, the main contacts output of not controlling under-voltage relay q, overvoltage relay g will be used as the single phase poaer supply in pull-in winding loop.
In Fig. 8, capacitor C
1Parallel resistance R
1Back and diode T
1Series connection constitutes unidirectional charging circuit, capacitor C
2Parallel resistance R
2Back and diode T
2Series connection constitutes another unidirectional charging circuit, constitutes electronic switch by rightabout two unidirectional charging circuit parallel connections again---and call " capacitance switch " in the following text, and represent with illustrated symbol, this figure then claims capacitance switch C.
In Fig. 9, adopt the triode T of charging conducting
3, T
4Replace the C among Fig. 8
1, C
2Electronic switch---call " triode switch " in the following text, and represent with illustrated symbol, this figure then claims triode switch T to formation.
In Figure 10; this autocontrol relay output circuit device is by the output control of main circuit switch contact; by " phase shortage. under-voltage. the overvoltage breaking protection circuit " (application number: 01128945.7). " self-controlled circuit break protective circuit " (application number 01145595.0) patented technology is used for A.C. contactor or circuit breaker; contact with under-voltage relay; connect or compose in parallel the QG switch in the contact of overvoltage relay; the QG switch of series connection is represented with illustrated symbol; QG switch in parallel is represented with the symbol shown in symbol Figure 11; the QG switch can be the switch that the relay contact in the utility model is formed; it also can be contact switch by the auxiliary relay of its control; the QG switch of series connection; the moving auxilliary contact S` series connection back of closing by pull-in winding S control is in parallel with startup button QA; again with this with stop button TA; pull-in winding S series connection; capacitance switch C or triode switch T and QG switch in parallel constitute automatic control open circuit protection A.C. contactor pull-in winding control circuit.
Fig. 8, Fig. 9 are self-controlled circuir break protective signal relay output circuit device was used for replacing starting switch before self fails operate as normal circuit structure diagrams.Figure 10 is a circuit structure diagram of connecting the pull-in winding loop when self-controlled circuir break protective signal relay output circuit continued short circuit before self fails operate as normal after the A.C. contactor start button disconnects.The operation principle of Fig. 8, Fig. 9, Figure 10 is: rightabout charge circuit charging finishes to be equivalent to the disconnection electronic switch, and its effect is equivalent to the contact switch of the time relay.
In Figure 11; connect with the QG switch of LC relay break contact Z`, parallel connection after tripping coil H, the capacitor C h parallel connection; insert three-phase rectifier power supply; capacitor C `h one is terminated at positive source; the other end is connected to power cathode; stop button TA one and be terminated at positive source, the other end is connected to the node of capacitor C h, tripping coil H, constitutes the energy-saving automatic control open circuit protection of snap close A.C. contactor tripping coil control circuit.Short circuit LC relay break contact Z` then becomes automatic control open circuit protection circuit breaker tripping coil control circuit.
The operation principle of Figure 11 is: LC relay break contact Z` disconnected when A.C. contactor started, the QG switch disconnects subsequently, adjust behind the delay time, LC relay break contact Z` closure, when situations such as phase shortage, under-voltage, overvoltage, dead electricity appear in main circuit, the QG switch closure, tripping coil H switches on and disconnects main contacts.
In Figure 12, insert negative and positive dual power after pull-in winding S, the capacitor C s parallel connection and constitute the energy-saving automatic control open circuit protection of remanent magnetism A.C. contactor pull-in winding control circuit, wherein positive supply is by single-phase rectifier diode T
1Tandem promoter button QA is as the startup power supply of pull-in winding S after the rectification, and negative supply is by three phase rectifier diode T
2Series limiting resistor R, the moving QG switch that closes auxilliary contact S`, parallel connection after the rectification, the QG switch in parallel stops the degaussing power supply of button TA as pull-in winding S.
The operation principle of Figure 12 is: press startup button QA, positive supply single-phase rectifier diode T
1Conducting, the energising of adhesive line chart S forward, capacitor C s positive charge is moved subsequently and is closed auxilliary contact S` closure simultaneously, and the QG switch disconnects; Disconnect startup button QA, capacitor C s is discharged to zero current, and A.C. contactor relies on remanent magnetism to keep adhesive; When situations such as phase shortage, under-voltage, overvoltage appear in main circuit, QG switch closure, negative supply three phase rectifier diode T
2Conducting, pull-in winding S` oppositely switches on degaussing and loses adhesive, and moving closing assisted contact S disconnection and the disconnection negative supply.
In Figure 13, insert positive and negative duplicate supply after pull-in winding S, the capacitor C s parallel connection and constitute the energy-saving automatic control open circuit protection of remanent magnetism A.C. contactor pull-in winding control circuit, wherein positive supply is by rectifier diode T
1As the startup power supply of pull-in winding S, negative supply is by rectifier diode T behind the tandem promoter button QA
2Series resistance R, the moving QG switch that closes auxilliary contact S`, resistance R `, parallel connection, the QG switch in parallel stops button TA, and capacitor C `s one is terminated at behind the node that resistance R .`, the moving node other end that closes auxilliary contact S` be connected to capacitor C s, pull-in winding S the degaussing power supply as pull-in winding S.
The operation principle of Figure 13 is: press startup button QA, positive supply rectifier diode T
1Conducting, the energising of pull-in winding S forward, capacitor C s positive charge is moved subsequently and is closed auxilliary contact S` closure simultaneously, and the QG switch disconnects; Disconnect startup button QA, capacitor C s is discharged to zero current, and A.C. contactor relies on remanent magnetism to keep adhesive; When situation such as phase shortage, under-voltage, overvoltage, dead electricity occurring when main circuit, the QG switch closure, capacitor C `s discharge, pull-in winding S oppositely switches on degaussing and loses adhesive, movingly closes auxilliary contact S` and disconnects and disconnect negative supply.
Claims (10)
1, self-controlled circuir break protective signal relay output circuit device is characterized in that: adopt AC relay to pick up circuir break protective signal and export the open circuit protection switching signal, it is by overvoltage relay g and under-voltage relay q
1Series connection, starting switch Kq one is terminated at g, q
1Node, the other end makes Kq short circuit g so that q
1The energising adhesive.
2, self-controlled circuir break protective signal relay output circuit device, it is characterized in that: 1) adopt direct current relay to pick up circuir break protective signal and export the open circuit protection switching signal, it is with the load of overvoltage relay g as the voltage multiplying rectifier power supply, shunt resistance Rg in parallel with g forms multiplication of voltage overvoltage relay G in order to proofread and correct overpressure value; With under-voltage relay q
1As the load of another voltage multiplying rectifier power supply, with q
1Shunt resistance Rg in parallel is in order to proofread and correct under-voltage value, with q
1Be parallel with the triode T of current-limiting resistance
qIn order to introduce the extraneous signal control of opening circuit, formation multiplication of voltage under-voltage relay Q
12) by above-mentioned multiplication of voltage overvoltage relay G and multiplication of voltage under-voltage relay Q
1Series connection, starting switch Kq one is terminated at G, Q
1Node, the other end makes Kq short circuit G so that Q
1The energising adhesive.
3, self-controlled circuir break protective signal relay output circuit device according to claim 1 is characterized in that: also have under-voltage relay q
2, overvoltage relay g, under-voltage relay q
1With under-voltage relay q
2Press star connection, Y connection, starting switch Kq one is terminated at asterism, and the other end makes Kq short circuit g so that q
1And q
2The energising adhesive.
4, self-controlled circuir break protective signal relay output circuit device according to claim 1 is characterized in that: also have under-voltage relay q
2And q
3, by overvoltage relay g and under-voltage relay q
3Series connection, q
3Be connected to asterism and under-voltage relay q
1., under-voltage relay q
2Constitute star connection, Y connection, starting switch Kq one is terminated at g, q
3Node, the other end makes Kq short circuit g so that q
1, q
2, q
3The energising adhesive.
5. self-controlled circuir break protective signal relay output circuit device according to claim 2 is characterized in that: this autocontrol relay output circuit is by multiplication of voltage overvoltage relay G, multiplication of voltage under-voltage relay Q
1, multiplication of voltage under-voltage relay Q
2Press star connection, Y connection, starting switch Kq one is terminated at asterism, the other end make the Kq short circuit in G so that Q
1, Q
2The energising adhesive.
6. self-controlled circuir break protective signal relay output circuit device according to claim 2 is characterized in that: this autocontrol relay output circuit is by multiplication of voltage overvoltage relay G and multiplication of voltage under-voltage relay Q
3Series connection, Q
3Be connected to asterism after the short circuit coupling capacitance, with multiplication of voltage under-voltage relay Q
1, multiplication of voltage under-voltage relay Q
2Constitute star connection, Y connection, starting switch Kq one termination G, Q
3Node, the other end makes Kq short circuit G so that Q
1, Q
2, Q
3The energising adhesive.
7. according to claim 1,2 described self-controlled circuir break protective signal relay output circuit devices, it is characterized in that the starting switch Kq in this autocontrol relay output circuit is the time-delay cut-off switch.
8. self-controlled circuir break protective signal relay output circuit device according to claim 7 is characterized in that Kq is a time relay contact switch, by direct current relay Z, capacitor C
2The LC relay that constitutes in parallel is as the time relay.
9. self-controlled circuir break protective signal relay output circuit device according to claim 7 is characterized in that the starting switch Kq in this autocontrol relay output circuit is an electronic switch, and electronic switch is by capacitor C
1Parallel resistance R
1Back and diode T
1Series connection constitutes unidirectional charging circuit, capacitor C
2Parallel resistance R
2Back and diode T
2Series connection constitutes another unidirectional charging circuit, constitutes capacitance switch by rightabout two unidirectional charging circuit parallel connections again
10. self-controlled circuir break protective signal relay output circuit device according to claim 9 is characterized in that the capacitor C in the electronic switch
1, C
2Can be with the charge triode T of conducting of base stage
3, T
4Replace, form triode switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03234757 CN2622897Y (en) | 2003-06-03 | 2003-06-03 | Output circuit device of self-controlled cut-off protective signal relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03234757 CN2622897Y (en) | 2003-06-03 | 2003-06-03 | Output circuit device of self-controlled cut-off protective signal relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2622897Y true CN2622897Y (en) | 2004-06-30 |
Family
ID=34249394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03234757 Expired - Fee Related CN2622897Y (en) | 2003-06-03 | 2003-06-03 | Output circuit device of self-controlled cut-off protective signal relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2622897Y (en) |
Cited By (2)
| 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 |
| CN101501799B (en) * | 2006-08-15 | 2012-02-15 | Abb技术有限公司 | Signal generation unit and method to generate a data signal in a control unit of a power system device |
-
2003
- 2003-06-03 CN CN 03234757 patent/CN2622897Y/en not_active Expired - Fee Related
Cited By (2)
| 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 |
| CN101501799B (en) * | 2006-08-15 | 2012-02-15 | Abb技术有限公司 | Signal generation unit and method to generate a data signal in a control unit of a power system device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040630 |