CN202564930U - Direct current operation loop anti-pumping circuit - Google Patents
Direct current operation loop anti-pumping circuit Download PDFInfo
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- CN202564930U CN202564930U CN2012202642555U CN201220264255U CN202564930U CN 202564930 U CN202564930 U CN 202564930U CN 2012202642555 U CN2012202642555 U CN 2012202642555U CN 201220264255 U CN201220264255 U CN 201220264255U CN 202564930 U CN202564930 U CN 202564930U
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Abstract
The utility model discloses a direct current operation loop anti-pumping circuit. The anti-pumping circuit comprises a switch-on self-hold relay, the positive pole of the switch-on self-hold relay being electrically connected with a switch-on button, the negative pole of the switch-on self-hold relay being electrically connected with a normally closed auxiliary contact of a breaker operation loop thought a normally closed contact of a block relay; a switch-off self-hold relay, the positive pole of the switch-off self-hold relay being electrically connected with a switch-off button, the negative pole of the switch-off self-hold relay being electrically connected with an normally open auxiliary contact of the breaker operation loop; a protective diode, the positive pole of the protective diode being electrically connected with the positive pole of a power source, the negative pole of the protective diode being electrically connected with a switch-on self-hold contact and a switch-off self-hold contact; and the block relay, the positive pole of the block relay being electrically connected with the switch-on self-hold contact and the switch-on button thought a block normally open contact and a switch-off self-hold normally open contact, the negative pole of the block relay being connected with the negative pole of the power source. With the block relay arranged, repeated impact on a faulty circuit led by repeated switching on of a breaker due to adhesion of the switch-on button and other switch-on switching contacts can be avoided, thereby ensuring safe operation of a power system.
Description
Technical field
The utility model relates to the relay protection of power system technical field, is specifically related to the anti-jump circuit of a kind of DC control circuit.
Background technology
At present, in electric power system, when carrying out breaking-closing operating, adopt switch knob and trip button to carry out the closing operation and the sub-switching operation of system more.And adopt button as switch, and the time that button triggers all is of short duration or interrupted, can not stablize the long time that continues, this just can't guarantee the reliability of breaking-closing operating.If therefore in the process of control divide-shut brake,, cause the damage of switchgear easily, influence the operate as normal of whole electric power system if triggering signal is broken off suddenly.Therefore, be to guarantee the reliability of breaking-closing operating, customary way be deciliter, insert a voltage starting, the auxiliary relay of electric current maintenance in the lock loop.The realization block diagram is as shown in Figure 1, and its operation principle is following:
(1) closing operation: when switch knob HZ connects; The switching voltage actuating coil HB-U of auxiliary relay receives; Combined floodgate self-holding contact HB1 connects; Power supply makes breaker closing coil LC receive electricity through combined floodgate self-holding contact HB1, switching current self-sustaining coil HB-I, circuit breaker normally-closed contact QF1, forms switching current; As the switching current electric current combined floodgate self-sustaining coil HB-I that flows through, make auxiliary relay HB be in the self-sustaining state, even switch knob HZ close a floodgate accomplish before disconnection, the combined floodgate self-holding contact HB1 of auxiliary relay HB can not break off immediately yet; When switch knob HZ breaks off, circuit breaker is normally closed to be attached the contact of helping QF2 and breaks off, and switching current is cut off, and the combined floodgate self-holding contact HB1 of auxiliary relay HB breaks off.
(2) trip operation: when circuit breaker was in closing position, often opening of connecting with breaking coil LT attached the contact of helping QF2 connection; This moment, tripping voltage actuating coil TB-U received electricity at once if trip button TZ is connected, and tripping operation self-holding contact TB1 connects; Power connection makes circuit breaker trip coil LT receive electricity, forms tripping current; The tripping current current trip self-sustaining coil TB-I that flows through makes auxiliary relay TB be in the self-sustaining state, even trip button TZ breaks off before tripping operation is accomplished, the self-holding contact TB1 that trips can not break off immediately yet; After tripping operation finished, circuit breaker is often opened attached the contact of helping QF2 disconnection, and tripping current is cut off, and tripping operation self-holding contact TB1 breaks off.
There is following technical problem in technique scheme:
If adhesion appears in combined floodgate self-holding contact or other contacts of switch knob HZ, parallel connection with it; When the needs circuit breaker trip, after tripping operation finished, the circuit breaker normally-closed contact QF1 that is cascaded with closing coil LC connected; Circuit breaker will close a floodgate once more; Make electric energy send into faulty line or equipment once more, cause repeatedly and impact, endanger the safe operation of electric power system greatly.
The utility model content
The utility model technical problem to be solved is to divide in the prior art, in the combined floodgate circuit, owing to the circuit breaker false switching phenomenon that contact adhesion lock causes occurs, and then provide a kind of DC control circuit to prevent the jump circuit.
For solving the problems of the technologies described above, the utility model provides a kind of DC control circuit to prevent the jump circuit, comprising:
Combined floodgate latching relay HB, it is anodal to be electrically connected with switch knob HZ, and the normally-closed contact BS1 of negative pole through blocking relay BS and breaker operator loop normally closed attached the contact of helping QF1 and is electrically connected;
Separating brake latching relay TB, its positive pole is electrically connected with opening button TZ, and negative pole attaches the contact of helping QF2 with often opening of breaker operator loop and is electrically connected;
Also comprise:
Protection diode D1, its positive pole is electrically connected with positive source, and its negative pole is electrically connected with combined floodgate self-holding contact HB1 and separating brake self-holding contact TB1;
Blocking relay BS, its positive pole is electrically connected with combined floodgate self-holding contact HB1 and switch knob HZ through locking normally opened contact BS2 and separating brake self-sustaining normally opened contact TB2, and its negative pole connects power cathode;
At least one switching current partial flow bypass path is composed in series by two diodes, and said switching current partial flow bypass path is parallelly connected with said combined floodgate latching relay HB, and the positive pole of said switching current partial flow bypass path is connected with said combined floodgate self-holding contact HB1; When switching current surpasses the rated current of said combined floodgate latching relay HB, two diode current flows of said switching current partial flow bypass path, the part switching current is through the switching current partial flow bypass path;
At least one branch brake current partial flow bypass path is composed in series by two diodes, and the brake current partial flow bypass path was parallelly connected with said separating brake latching relay TB in said minute, and the positive pole of said minute brake current partial flow bypass path is connected with said separating brake self-holding contact TB1; When minute brake current surpasses the rated current of said separating brake latching relay TB, two diode current flows of said minute brake current partial flow bypass path, part branch brake current is passed through branch brake current partial flow bypass path.
Diode is a silicon diode described in the said switching current partial flow bypass path.
Diode is a silicon diode described in the said minute brake current partial flow bypass path.
Said protection diode D1 is a silicon diode.
The technique scheme of the utility model has following advantage:
(1) the anti-jump circuit of the DC control circuit of the utility model, when adhesion appearred in switch knob and other combined floodgate switch contact, positive source was through being electrically connected the anodal UNICOM with closing coil; In this case, if opening button is connected or other parallelly connected with it separating brake contactings, the branch brake current can make the adhesive of separating brake latching relay; Separating brake self-sustaining normally opened contact is introduced blocking relay with power supply; Blocking relay receives electric adhesive, and the locking normally-closed contact breaks off, and cuts off closing circuit; The locking normally opened contact is connected, and forms the self-sustaining of blocking relay; And after often opening in the circuit breaker loop attached the contact of helping or normally closed and attach the contact of helping tripping operation, because closing circuit cut off, so circuit breaker can not close a floodgate once more; After the self-sustaining of blocking relay will last till that adhesion is removed, blocking relay just can cut off the power supply and return, and had therefore avoided because the circuit breaker that adhesion brings closes a floodgate once more, and the repeatedly impact that causes has ensured the safe operation of electric power system.
(2) in the utility model; Owing to adopt the switching current partial flow bypass path and divide the brake current partial flow bypass path; When switching current and branch brake current exceed the rated current of combined floodgate latching relay and separating brake latching relay, play the effect of shunting, can protect combined floodgate latching relay and separating brake latching relay; Because the conducting voltage of diode is 0.6V; And the conducting electric current can change in a bigger scope, and the conducting voltage of two diodes is 1.2V, is the typical action voltage of combined floodgate latching relay and separating brake latching relay just; And the electric current sum of the conducting electric current of two diodes and latching relay can change in 0.1A ~ 3A scope; Can satisfy the needs in conventional breaker operator loop; If this current range is not enough, can also continue parallelly connected a plurality of electric current partial flow bypass path, so that its output current has bigger scope; Make it can satisfy the needs in more breaker operator loop, have better generality.
Description of drawings
For the content that makes the utility model is more clearly understood, below according to the specific embodiment of the utility model and combine accompanying drawing, the utility model is done further detailed explanation, wherein:
Fig. 1 is branch, combined floodgate self-hold circuit figure in the prior art;
The anti-jump circuit of DC control circuit that Fig. 2 provides for the utility model;
Wherein Reference numeral is: the 1-binding post.
Embodiment
Provide the specific embodiment of the utility model below; A kind of DC control circuit is prevented the jump circuit; Comprise: combined floodgate latching relay HB; It is anodal to be electrically connected with switch knob HZ, and the normally-closed contact BS1 of negative pole through blocking relay BS and breaker operator loop normally closed attached the contact of helping QF1 and be electrically connected; Separating brake latching relay TB, its positive pole is electrically connected with opening button TZ, and negative pole attaches the contact of helping QF2 with often opening of breaker operator loop and is electrically connected; Also comprise: protection diode D1, its positive pole is electrically connected with positive source, and its negative pole is electrically connected with combined floodgate self-holding contact HB1 and separating brake self-holding contact TB1; Blocking relay BS, its positive pole is electrically connected with combined floodgate self-holding contact HB1 and switch knob HZ through locking normally opened contact BS2 and separating brake self-sustaining normally opened contact TB2, and its negative pole connects power cathode; At least one switching current partial flow bypass path is composed in series by two diodes, and said switching current partial flow bypass path is parallelly connected with said combined floodgate latching relay HB, and the positive pole of said switching current partial flow bypass path is connected with said combined floodgate self-holding contact HB1; When switching current surpasses the rated current of said combined floodgate latching relay HB, two diode current flows of said switching current partial flow bypass path, the part switching current is through the switching current partial flow bypass path; At least one branch brake current partial flow bypass path is composed in series by two diodes, and the brake current partial flow bypass path was parallelly connected with said separating brake latching relay TB in said minute, and the positive pole of said minute brake current partial flow bypass path is connected with said separating brake self-holding contact TB1; When minute brake current surpasses the rated current of said separating brake latching relay TB, two diode current flows of said minute brake current partial flow bypass path, part branch brake current is passed through branch brake current partial flow bypass path.Its middle connecting terminal 1 is used for the connection of electric wire.
The DC control circuit of the utility model is prevented the jump circuit, and as switch knob HZ, or close a floodgate self-holding contact HB1 when adhesion occurring, positive source is through being electrically connected the anodal UNICOM with combined floodgate latching relay HB; In this case, if opening button TZ connects or other parallelly connected with it separating brake contactings, the branch brake current can make separating brake latching relay TB adhesive; Separating brake self-sustaining normally opened contact TB2 introduces blocking relay BS with power supply; Blocking relay BS receives electric adhesive, and the normally-closed contact BS1 of blocking relay breaks off, and cuts off closing circuit; The normally opened contact BS2 of blocking relay connects, and forms the self-sustaining of blocking relay BS; And after often opening in the circuit breaker loop attached the contact of helping QF2 or normally closed and attach the contact of helping QF1 tripping operation, because closing circuit cut off, so circuit breaker can not close a floodgate once more; After the self-sustaining of blocking relay BS will last till that adhesion is removed, blocking relay BS just can cut off the power supply and return, and had therefore avoided because the circuit breaker that adhesion brings closes a floodgate once more, and the repeatedly impact that causes has ensured the safe operation of electric power system.
Diode is a silicon diode described in the said in the present embodiment switching current partial flow bypass path, and diode is a silicon diode described in the said minute brake current partial flow bypass path, and said protection diode D1 is a silicon diode.In the present embodiment, because the conducting voltage of diode is 0.6V, and the conducting electric current can change in a bigger scope, and the conducting voltage of two diodes is 1.2V, is the typical action voltage of closing relay and separating brake relay just; And the electric current sum of the conducting electric current of two diodes and relay can change in 0.1A ~ 3A scope; Can satisfy the needs in conventional breaker operator loop; If this current range is not enough, can also continue parallelly connected a plurality of electric current partial flow bypass path, so that its output current has bigger scope; Make it can satisfy the needs in more breaker operator loop, have better generality.
Obviously, the foregoing description only be for explanation clearly done for example, and be not qualification to execution mode.For the those of ordinary skill in affiliated field, can also make other multi-form variation or change on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And conspicuous variation of being extended out thus or change still are among the protection range of the utility model creation.
Claims (4)
1. a DC control circuit is prevented the jump circuit, comprising:
Combined floodgate latching relay HB, it is anodal to be electrically connected with switch knob HZ, and the normally-closed contact BS1 of negative pole through blocking relay BS and breaker operator loop normally closed attached the contact of helping QF1 and is electrically connected;
Separating brake latching relay TB, its positive pole is electrically connected with opening button TZ, and negative pole attaches the contact of helping QF2 with often opening of breaker operator loop and is electrically connected;
It is characterized in that, also comprise:
Protection diode D1, its positive pole is electrically connected with positive source, and its negative pole is electrically connected with combined floodgate self-holding contact HB1 and separating brake self-holding contact TB1;
Blocking relay BS, its positive pole is electrically connected with combined floodgate self-holding contact HB1 and switch knob HZ through locking normally opened contact BS2 and separating brake self-sustaining normally opened contact TB2, and its negative pole connects power cathode;
At least one switching current partial flow bypass path is composed in series by two diodes, and said switching current partial flow bypass path is parallelly connected with said combined floodgate latching relay HB, and the positive pole of said switching current partial flow bypass path is connected with said combined floodgate self-holding contact HB1; When switching current surpasses the rated current of said combined floodgate latching relay HB, two diode current flows of said switching current partial flow bypass path, the part switching current is through the switching current partial flow bypass path;
At least one branch brake current partial flow bypass path is composed in series by two diodes, and the brake current partial flow bypass path was parallelly connected with said separating brake latching relay TB in said minute, and the positive pole of said minute brake current partial flow bypass path is connected with said separating brake self-holding contact TB1; When minute brake current surpasses the rated current of said separating brake latching relay TB, two diode current flows of said minute brake current partial flow bypass path, part branch brake current is passed through branch brake current partial flow bypass path.
2. DC control circuit according to claim 1 is prevented the jump circuit, it is characterized in that:
Diode is a silicon diode described in the said switching current partial flow bypass path.
3. DC control circuit according to claim 2 is prevented the jump circuit, it is characterized in that:
Diode is a silicon diode described in the said minute brake current partial flow bypass path.
4. according to the anti-jump circuit of the arbitrary described DC control circuit of claim 1-3, it is characterized in that:
Said protection diode D1 is a silicon diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202642555U CN202564930U (en) | 2012-06-06 | 2012-06-06 | Direct current operation loop anti-pumping circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202642555U CN202564930U (en) | 2012-06-06 | 2012-06-06 | Direct current operation loop anti-pumping circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202564930U true CN202564930U (en) | 2012-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202642555U Expired - Lifetime CN202564930U (en) | 2012-06-06 | 2012-06-06 | Direct current operation loop anti-pumping circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202564930U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105261531A (en) * | 2015-10-26 | 2016-01-20 | 国网河南灵宝市供电公司 | Multi-stroke realizing circuit and multi-stroke control method for circuit breakers |
| CN105261530A (en) * | 2015-10-26 | 2016-01-20 | 国网河南灵宝市供电公司 | Multi-stroke realizing circuit and multi-stroke control method for circuit breakers |
-
2012
- 2012-06-06 CN CN2012202642555U patent/CN202564930U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105261531A (en) * | 2015-10-26 | 2016-01-20 | 国网河南灵宝市供电公司 | Multi-stroke realizing circuit and multi-stroke control method for circuit breakers |
| CN105261530A (en) * | 2015-10-26 | 2016-01-20 | 国网河南灵宝市供电公司 | Multi-stroke realizing circuit and multi-stroke control method for circuit breakers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: NANHONG ELECTRIC TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ZHEJIANG NANRUI ELECTRIC POWER AUTOMATION CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Xinguang industrial zone of Liushi town of Yueqing city of Zhejiang Province, Wenzhou City, 325604 Patentee after: NAHO ELECTRIC POWER TECHNOLOGY CO., LTD. Address before: 325604 CHINT Road, Xinguang industrial district, Yueqing, Zhejiang, Wenzhou, Liushi Patentee before: Zhejiang Nanrui Electric Power Automation Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121128 |