CN212784757U - Divide-shut brake coil anti-burnout device and circuit breaker of circuit breaker equipment - Google Patents
Divide-shut brake coil anti-burnout device and circuit breaker of circuit breaker equipment Download PDFInfo
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- CN212784757U CN212784757U CN202021707311.9U CN202021707311U CN212784757U CN 212784757 U CN212784757 U CN 212784757U CN 202021707311 U CN202021707311 U CN 202021707311U CN 212784757 U CN212784757 U CN 212784757U
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Abstract
The utility model relates to a divide-shut brake coil of circuit breaker equipment prevents burning out device and circuit breaker, include: the relay comprises a first time relay, a second time relay, a first intermediate relay, a second intermediate relay and a third intermediate relay; a delay contact of the first time relay is connected in series with a coil of the first intermediate relay, then is connected in parallel with the coil of the first time relay, and then is connected into a closing operation loop, and a normally closed contact of the first intermediate relay is connected in series with the closing coil loop; and a delay contact of the second time relay is connected with a coil of the second intermediate relay in series and then connected with a coil of the second time relay in parallel, and then connected into the opening operation loop, and a normally closed contact of the second intermediate relay is connected in series into the opening coil loop. The safety of the opening and closing coil can be timely guaranteed when the opening and closing coil continuously flows current, and the damage of the opening and closing coil is avoided.
Description
Technical Field
The utility model belongs to the technical field of substation equipment, concretely relates to divide-shut brake coil of circuit breaker equipment prevents burning out device and circuit breaker.
Background
The burning accidents of the opening and closing coils often occur in the operation of the power system, if the circuit breaker refuses to operate due to the opening loop of the circuit breaker, the accidents are enlarged, the large-area power failure caused by the overgrade opening is caused, and even serious consequences such as the burning of power equipment, fire hazard and the like are caused. When the integrity of the closing loop is damaged, although the damage caused by the damage is smaller than that caused by the damage of the integrity of the opening loop, the circuit cannot normally transmit power, and the improvement of the power supply reliability is prevented.
The opening and closing coil is an indispensable component of circuit, bus coupler and main transformer in the transformer substation at each side interval circuit breaker equipment, and the characteristic is that current can not flow through for a long time, otherwise the coil burns out. In recent years, due to the problems of external environment, equipment service time, mechanism jamming and the like, the condition that the switching-on and switching-off coils are burnt out frequently occurs, and all the measures are taken to replace the switching-on and switching-off coils of the burnt circuit breaker equipment to solve the problem, so that the problem is not solved fundamentally, and the replacement cost is increased.
SUMMERY OF THE UTILITY MODEL
The divide-shut brake coil easy problem that exists in order to solve prior art is damaged, the replacement cost is high, the utility model provides a breaker equipment's divide-shut brake coil prevents burning out device and circuit breaker, it has in time protects divide-shut brake coil and avoids damaging, sparingly characteristics such as change expense.
According to the utility model discloses an embodiment's divide-shut brake coil anti-burnout device of circuit breaker equipment, include: the relay comprises a first time relay, a second time relay, a first intermediate relay and a second intermediate relay;
the delay contact of the first time relay is connected with the coil of the first intermediate relay in series and then connected with the coil of the first time relay in parallel, and then the delay contact of the first time relay is connected into a closing operation loop;
and the delay contact of the second time relay is connected with the coil of the second intermediate relay in series and then connected with the coil of the second time relay in parallel, and then connected into the opening operation loop, and the normally closed contact of the second intermediate relay is connected in series in the opening coil loop.
Further, the delay time of the first time relay is larger than the inherent closing time of the circuit breaker and not larger than 200 ms.
Further, the delay time of the second time relay is larger than the inherent opening time of the circuit breaker and not larger than 200 ms.
Further, the current carrying capacity of the contacts of the first intermediate relay and the second intermediate relay is not less than 5 amperes.
Furthermore, the device also comprises a third intermediate relay, wherein a coil of the third intermediate relay is connected in series with the normally open contact of the first intermediate relay, the normally open contact of the second intermediate relay and the normally open contact of the third intermediate relay which are connected in parallel are connected into a control circuit, the normally closed contact of the third intermediate relay plays a self-holding role, and the control circuit is also connected with a local reset button and a remote separation button in series.
Furthermore, the normally open contact of the first intermediate relay and the normally open contact of the second intermediate relay are also used for being connected into a measurement and control device to monitor the opening and closing rejection phenomena of the circuit breaker.
Further, the normally closed contact of the first intermediate relay and the normally closed contact of the second intermediate relay are connected in parallel with capacitance protection.
Further, the technical requirements of the first intermediate relay, the second intermediate relay and the third intermediate relay are at least to meet: the rated voltage of the coil of the intermediate relay conforms to the voltage of the operation power supply; has at least two open and two close contacts; and the current-carrying capacity of the contact is not less than 5 amperes, and the electric service life of the relay under normal load is not less than 1 ten thousand times.
Further, the technical requirements of the first time relay and the second time relay meet: the rated voltage of the time relay coil is consistent with the voltage of the operation power supply; the delay time of the opening and closing coil is 0.01-9.99 seconds, the delay time for protecting the energy storage motor loop is 0.1-30 seconds, the delay error is less than or equal to 9 percent, and the electric service life is 10 ten thousand times.
According to the utility model provides a circuit breaker, including above breaker equipment's divide-shut brake coil burnout prevention device.
The utility model has the advantages that: the circuit formed by the time relay and the intermediate relay respectively protects the opening coil and the closing coil of the circuit breaker, the corresponding intermediate relay acts after the set time relay acts, the normally closed contact of the intermediate relay breaks the power supply of the corresponding opening and closing coil circuit, and the long-time electrification of the opening and closing coil is avoided, so that when the opening and closing coil continuously flows current due to the problems of external environment, equipment service time, mechanism jamming and the like, the safety of the opening and closing coil can be timely guaranteed, and the damage of the opening and closing coil is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a switching-off and switching-on coil burn-prevention device of a circuit breaker apparatus provided in accordance with an exemplary embodiment;
fig. 2 is an electrical block diagram of a circuit breaker apparatus provided in accordance with an exemplary embodiment;
fig. 3 is an electrical structural diagram of a circuit breaker apparatus in which a switching-off and switching-on coil burnout prevention device of the circuit breaker apparatus is installed, according to an exemplary embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the embodiment of the utility model provides a divide-shut brake coil burnout prevention device of circuit breaker equipment, include: a first time relay (1SJ), a second time relay (2SJ), a first intermediate relay (1ZJ) and a second intermediate relay (2 ZJ);
a first time relay (1SJ1) delay contact is connected in series with a first intermediate relay (1ZJ) coil and then connected in parallel with the first time relay (1SJ) coil, and then connected into a closing operation loop, and a normally closed contact (1ZJ1) of the first intermediate relay is connected in series with the closing coil loop;
and a delay contact of a second time relay (2SJ1) is connected in series with a coil of a second intermediate relay (2ZJ) and then connected in parallel with a coil of the second time relay (2SJ) to be connected into an opening operation loop, and a normally closed contact (2ZJ1) of the second intermediate relay is connected in series with the opening coil loop.
Specifically, a circuit breaker refers to a switching device which can close, carry and open/close normal current of an operation loop, and can also close, carry and open/close specified overload current (including short-circuit current) within specified time; closing a coil: HQ for short, the firing pin is driven by the excitation of a coil to trigger a closing spring mechanism, so as to achieve the purpose of closing; a brake separating coil: TQ for short, the purpose of brake separating is achieved by driving a firing pin through coil excitation to trigger a brake separating spring mechanism. The latest data statistical analysis data show that the emergency defect of the breaker equipment has a tendency of rising year by year, the safe and stable operation of a power grid is seriously influenced, and large-area power failure is caused; the influence on the normal power supply of customers, the adverse effect on the society, the loss of the power supply amount and the like. Among the emergency defects of the circuit breaker devices, the emergency defect caused by the fact that the opening and closing coils are burnt out to cause the circuit breaker to reject opening and closing is generated. Therefore, the problem that the opening and closing coil of the circuit breaker is frequently burnt is solved, and the emergency defect of the circuit breaker equipment is greatly reduced. The actual reasons for the emergency defects of the circuit breaker equipment are that the opening and closing coil is burnt out, the energy storage motor is damaged, the gas pressure is low, the bolt is loose, the mechanism is jammed and the like, the opening and closing coil is burnt out by one third, the cost of the existing mode for replacing the opening and closing coil comprises most of the components of the purchase of the opening and closing coil, the personnel cost, the vehicle use and the power supply loss, and the opening and closing coil is increased along with the increase of the applied voltage of the transformer substation.
Referring to the drawing data of the running transformer substation in the prior art shown in fig. 2, the switching-off and switching-on loops of the circuit breaker equipment at intervals of 110kV, 35kV and 10kV can be known that the switching-off coil of the circuit breaker equipment is directly connected in series into the switching-off loop and the switching-on coil is directly connected in series into the switching-on loop, and there is no measure design for protecting the switching-off and switching-on coils.
From fig. 2, it can be seen that the existing circuit breaker apparatus may be, from top to bottom: operating power source + KM, -KM; a jump monitoring loop formed by the TWJ relay; a closing maintaining loop formed by HBJ relays; TBJ anti-jump loop formed by relay; and a lower protection switching-on, manual switching-on and remote control switching-on loop; the opening coil is a corresponding loop of the opening with the same principle.
Referring to fig. 3, the utility model discloses an add the protection circuit that auxiliary relay and time relay constitute, time relay's time delay contact (1SJ1 or 2SJ1) sets up the front end at auxiliary relay, auxiliary relay's normally closed contact concatenates between combined floodgate or separating brake coil return circuit, be in the state of normally closed at normal during operation, thereby make the normal work of separating and closing brake coil, in case trigger manual, after the operation of remote control (automatic) separating and closing brake, thereby time relay makes auxiliary relay go up the electricity at the time back time delay contact closure that the time delay was set for, make auxiliary relay's normally closed contact disconnection separating and closing brake coil return circuit's power, thereby make separating and closing brake coil outage, the safety of separating and closing brake coil has been guaranteed, avoid separating and closing brake coil to be burnt, extra expense has been saved simultaneously.
In some embodiments of the present invention, the delay time of the first time relay (i.e. the delay time of 1SJ1) can be adjusted properly according to the inherent closing time, and is not greater than 200 ms.
The delay time (namely 2SJ1 delay time) of the second time relay is properly adjusted according to the inherent opening time of the circuit breaker, and the delay time of 2SJ1 is larger than the inherent opening time of the circuit breaker and is not more than 200 ms.
The current carrying capacity of the contacts of the intermediate relay, namely the first intermediate relay and the second intermediate relay, is not less than 5 amperes. And the normally closed contact of the first intermediate relay and the normally closed contact of the second intermediate relay can be connected with a capacitor protection C in parallel, so that the normally closed contact is protected from being burnt at the moment when the normally closed contact of the intermediate relay is opened, and the safety of the normally closed contact of the intermediate relay is ensured.
When the separation and the rejection occur, scheduling, operation and maintenance personnel can check the background or the monitoring system to know whether the circuit breaker mechanism is jammed, and the normally open contact 1ZJ2 of the first intermediate relay and the normally open contact 2ZJ2 of the second intermediate relay need to be connected into the measurement and control device in the mode, so that the linkage monitoring is facilitated.
In some embodiments of the present invention, the switch further comprises a third intermediate relay, wherein the coil of the third intermediate relay is connected in series to the normally open contact of the first intermediate relay, the normally open contact of the second intermediate relay and the normally open contact of the third intermediate relay are connected in parallel and then connected to the control circuit, the normally open contact of the third intermediate relay plays a self-holding role, and the control circuit is further connected in series to a local reset button and a remote separation button.
The utility model discloses a another kind of wiring mode mechanism jamming signal need the fortune examine personnel to the scene and carry out manual reset, at this moment need increase 3ZJ auxiliary relay and obtain this signal and supply the maintainer to use, also can concatenate a distant branch contact simultaneously and realize distant place reset.
As an implementation manner of the above embodiment, the technical requirements of the first intermediate relay, the second intermediate relay, and the third intermediate relay satisfy: 1. the rated voltage of the coil of the intermediate relay conforms to the voltage of the operation power supply; 2. has at least two open and two close contacts; 3. the current-carrying capacity of the contact is not less than 5 amperes, and the electric service life of the relay is not less than 1 ten thousand times under normal load. The technical requirements of the first time relay and the second time relay at least meet: the rated voltage of the time relay coil is consistent with the voltage of the operation power supply; the delay time of the opening and closing coil is 0.01-9.99 seconds, the delay time for protecting the energy storage motor loop is 0.1-30 seconds, the delay error is less than or equal to 9 percent, and the electric service life is 10 ten thousand times.
The embodiment of the utility model provides a circuit breaker is still provided, including above embodiment circuit breaker equipment's divide-shut brake coil burnout prevention device. The specific implementation mode of the anti-burnout device of the opening and closing coil of the circuit breaker equipment provided by the embodiment can be referred to, and the utility model discloses no longer give unnecessary details here.
The utility model discloses above-mentioned embodiment provides a breaker equipment's divide-shut brake coil anti-burn device, the operation is kept watch on conveniently, can not have a power failure to change the relay when the relay destroys, does not influence the normal operating of circuit breaker when the relay destroys. The burning probability of each relay is very small, and the additionally arranged relays are electrified only in short time during operation. When the disconnection and the disconnection are refused, the dispatching, running and overhauling personnel can know the starting of the protection function of the disconnection and the closing coil by checking the background or the monitoring system without adding a cable, so that the search range of the fault point is reduced. The probability of burning out the circuit breaker opening and closing coil is greatly reduced, the processing time is only the time of first installation, and is about one fourth of the time of processing the defect of the circuit breaker opening and closing coil, the circuit breaker opening and closing loop can be operated repeatedly, the operability of the circuit breaker is improved, the guarantee is improved for the safe and stable operation of a power grid, and the economic benefit is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a divide-shut brake coil anti-burnout device of circuit breaker equipment which characterized in that includes: the relay comprises a first time relay, a second time relay, a first intermediate relay and a second intermediate relay;
the delay contact of the first time relay is connected with the coil of the first intermediate relay in series and then connected with the coil of the first time relay in parallel, and then the delay contact of the first time relay is connected into a closing operation loop;
and the delay contact of the second time relay is connected with the coil of the second intermediate relay in series and then connected with the coil of the second time relay in parallel, and then connected into the opening operation loop, and the normally closed contact of the second intermediate relay is connected in series in the opening coil loop.
2. The apparatus of claim 1, wherein the delay time of the first time relay is greater than an intrinsic closing time of the circuit breaker and no greater than 200 ms.
3. The apparatus of claim 1, wherein the delay time of the second time relay is greater than the inherent opening time of the circuit breaker and not greater than 200 ms.
4. The apparatus of claim 1, wherein the contact current carrying capacity of the first and second intermediate relays is not less than 5 amps.
5. The device of claim 1, further comprising a third intermediate relay, wherein the coil of the third intermediate relay is connected in series with the normally open contact of the first intermediate relay, the normally open contact of the second intermediate relay, and the normally open contact of the third intermediate relay, and then connected in parallel to a control loop, wherein the loop is further connected in series with a local reset button and a remote switch button.
6. The device of claim 1, wherein the normally open contact of the first intermediate relay and the normally open contact of the second intermediate relay are further used for accessing a measurement and control device to monitor the opening and closing rejection phenomena of the circuit breaker.
7. The apparatus of claim 1, wherein the normally closed contact of the first intermediate relay and the normally closed contact of the second intermediate relay are connected in parallel with a capacitive protection.
8. The apparatus of claim 5, wherein the technical requirements of the first intermediate relay, the second intermediate relay, and the third intermediate relay are at least satisfied: the rated voltage of the coil of the intermediate relay conforms to the voltage of the operation power supply; has at least two open and two close contacts; and the current-carrying capacity of the contact is not less than 5 amperes, and the electric service life of the relay under normal load is not less than 1 ten thousand times.
9. The device according to any one of claims 1 to 7, characterized in that the technical requirements of the first time relay and the second time relay are satisfied: the rated voltage of the time relay coil is consistent with the voltage of the operation power supply; the delay time of the opening and closing coil is 0.01-9.99 seconds, the delay time for protecting the energy storage motor loop is 0.1-30 seconds, the delay error is less than or equal to 9 percent, and the electric service life is 10 ten thousand times.
10. A circuit breaker comprising the opening and closing coil burnout preventing device of the circuit breaker apparatus as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021707311.9U CN212784757U (en) | 2020-08-14 | 2020-08-14 | Divide-shut brake coil anti-burnout device and circuit breaker of circuit breaker equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021707311.9U CN212784757U (en) | 2020-08-14 | 2020-08-14 | Divide-shut brake coil anti-burnout device and circuit breaker of circuit breaker equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212784757U true CN212784757U (en) | 2021-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021707311.9U Active CN212784757U (en) | 2020-08-14 | 2020-08-14 | Divide-shut brake coil anti-burnout device and circuit breaker of circuit breaker equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212784757U (en) |
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- 2020-08-14 CN CN202021707311.9U patent/CN212784757U/en active Active
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Effective date of registration: 20221107 Address after: No. 29, Fenghuang Road, Wenshan City, Wenshan Zhuang and Miao Autonomous Prefecture, Yunnan Province Patentee after: Wenshan Power Supply Branch of Yunnan Power Grid Co.,Ltd. Address before: No. 29, Fenghuang Road, Wenshan City, Wenshan Zhuang and Miao Autonomous Prefecture, Yunnan Province Patentee before: YUNNAN WENSHAN ELECTRIC POWER Co.,Ltd. |