CN210092862U - Temperature detection device capable of automatically cutting off control loop and circuit breaker - Google Patents
Temperature detection device capable of automatically cutting off control loop and circuit breaker Download PDFInfo
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- CN210092862U CN210092862U CN201921100200.9U CN201921100200U CN210092862U CN 210092862 U CN210092862 U CN 210092862U CN 201921100200 U CN201921100200 U CN 201921100200U CN 210092862 U CN210092862 U CN 210092862U
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- temperature
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- sensing element
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Abstract
The utility model discloses a temperature detection device and a circuit breaker that can cut off control circuit automatically, temperature detection device contains temperature sensing element PT and relay KA, relay KA contains coil pin, at least a set of normally closed contact and at least a set of normally open contact, the coil pin can be connected with control power supply, normally closed contact can concatenate in the control circuit that the electric drive element in the high-voltage switchgear is located, normally open contact is connected with alarm unit HL; the temperature sensing element PT is connected with the relay KA in series through a lead, is arranged on one side of an electric driving element in the high-voltage switch equipment or the high-voltage switch equipment and is used for detecting the current temperature of the electric driving element, and the temperature detection device can be used for solving the problem that a control loop cannot be mechanically cut off when the operation failure or the related elements of the control loop are abnormal in the high-voltage switch equipment such as the conventional circuit breaker.
Description
Technical Field
The utility model especially relates to a but temperature-detecting device and a circuit breaker of automatic cutout control circuit.
Background
In an electric power system, a circuit breaker, a contactor and a relay are all common high-voltage switch equipment and are used for performing open-close control on a control loop, and when the high-voltage switch equipment is in actual use, the high-voltage switch equipment is burnt or other electrical equipment in the loop where the high-voltage switch equipment is located is burnt when the high-voltage switch equipment is abnormal or fails to operate. The breaker is particularly one of the most important devices of the distribution network transformer substation, the safe and reliable operation of the breaker plays a crucial role in cutting off fault current and ensuring the safe and reliable operation of a power grid, the fault phenomena of the breaker of 220kV and below are very frequent in the operation and maintenance process of a power station in the administration range of a company, and the on-site fault reasons are mostly confirmed to be that the breaker cannot normally act due to burning loss of a switching-on/off coil; if the circuit breaker fails to operate due to the disconnection of the circuit breaker opening circuit, the accident is enlarged, the large-area power failure caused by the overgrade opening is caused, even the serious consequences such as burning loss of power equipment and fire hazard are caused, when the integrity of the closing circuit is damaged, although the caused damage is smaller than the damage of the integrity of the opening circuit, the circuit cannot normally transmit power, and the improvement of the power supply reliability is prevented.
Disclosure of Invention
The utility model aims at providing a but automatic cutout control circuit's temperature-detecting device and the circuit breaker that constitutes solve high voltage switch equipment such as current circuit breaker and appear refusing to move or the control circuit problem that the control circuit can't be cut off by machinery when the relevant component of control circuit is unusual.
In order to solve the above problems, the present application provides a temperature detection device capable of automatically cutting off a control loop, which includes a temperature sensing element PT and a relay KA, where the relay KA includes a coil pin, at least one set of normally closed contacts and at least one set of normally open contacts, the coil pin may be connected to a control power supply, the normally closed contacts may be connected in series to a control loop in which an electrical driving element in a high-voltage switch device is located, and the normally open contacts are connected to an alarm unit HL; the temperature sensing element PT is connected with the relay KA in series through a lead, and is arranged on one side of the high-voltage switch equipment or an electric driving element in the high-voltage switch equipment and used for detecting the current temperature of the electric driving element.
As the preferred scheme of this application, relay KA contains two sets of normally open contacts, and a set of normally open contact is connected with alarm unit HL, and another group of normally open contact connects in parallel at the both ends of temperature-sensing element PT.
As a preferred scheme of the application, the alarm unit HL comprises an alarm, a single chip microcomputer and a wireless signal receiving and transmitting module, the alarm and the wireless signal receiving and transmitting module are connected with an I/O pin of the single chip microcomputer, and alarm information is preset in the single chip microcomputer.
As a preferred aspect of the present application, the temperature sensing element PT includes an NTC thermistor or a bimetal temperature switch.
In order to solve the above problems, the present application further provides a circuit breaker, which includes a switching-off coil and a switching-on coil, and is provided with a temperature detection device, where the temperature detection device includes a temperature sensing element PT and a relay KA, the relay KA includes coil pins, at least one set of normally closed contacts and at least one set of normally open contacts, the coil pins are connected to a control power supply, and the normally closed contacts are connected in series in a switching-off coil loop and/or a switching-on coil loop; the normally open contact is connected with an alarm unit HL; the temperature sensing element PT is connected with the relay KA in series through a lead and is arranged on one side of the opening coil and/or the closing coil.
As the preferred scheme of this application, relay KA contains two sets of normally open contacts, and a set of normally open contact is connected with alarm unit HL, and another group of normally open contact connects in parallel at the both ends of temperature-sensing element PT.
As a preferred scheme of the application, the alarm unit HL comprises an alarm, a single chip microcomputer and a wireless signal receiving and transmitting module, the alarm and the wireless signal receiving and transmitting module are connected with an I/O pin of the single chip microcomputer, and alarm information is preset in the single chip microcomputer.
As a preferred aspect of the present application, the temperature sensing element PT includes an NTC thermistor or a bimetal temperature switch.
Compared with the prior art, this but temperature-detecting device of automatic cutout control circuit and the circuit breaker of constitution in this application's beneficial effect contains:
1) the control loop is opened and closed by detecting the temperature of the coil in the control loop, so that serious accidents are avoided, and the power supply reliability is improved.
2) Maintenance personnel can in time make the maintenance processing according to alarm information, shorten the power off time.
3) The coil is prevented from being burnt out, and the use cost and the maintenance cost of the high-voltage switch equipment are effectively reduced.
4) Simple operation and low use cost.
Reference numerals
PT is a temperature sensing element, KA is a relay, HL is an alarm unit, KJL is a contactor, LCL is a closing coil, LTR is an opening coil, SB1 and SB2 are closing and opening buttons, SBT is a change-over switch, S1 is an auxiliary switch, and SPX is an energy storage normally closed contact.
Drawings
Fig. 1 is a schematic view illustrating a connection structure of components in a temperature detecting device according to an embodiment of the present invention;
fig. 2 is a schematic view of a connection structure of components in another temperature detecting device according to an embodiment of the present invention;
fig. 3 is a control block diagram of an alarm unit HL according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a temperature detection device including two sets of temperature sensing elements and a set of relay in an opening/closing loop according to a second embodiment of the present invention;
fig. 5 is a circuit diagram of a temperature detection device including two sets of temperature sensing elements and two sets of relays in a switch-off and switch-on loop according to an embodiment of the present invention.
Detailed Description
Example 1:
in this embodiment, the high voltage switch device includes any one of a relay, a circuit breaker, and a contactor, and the electric driving element is a switching-on coil and a switching-off coil disposed in the relay, the circuit breaker, and the contactor.
Referring to fig. 1, a schematic diagram of a connection structure of elements in the high temperature detection apparatus provided in this embodiment is shown, where the apparatus includes a temperature sensing element PT and a relay KA, where the relay KA includes a coil pin, at least one set of normally closed contacts and at least one set of normally open contacts, and the coil pin may be connected to a control power supply; the temperature sensing element PT is connected with the relay KA in series through a lead, and the temperature sensing element PT is arranged on one side of the electric driving element in the high-voltage switch equipment or the high-voltage switch equipment and used for detecting the current temperature of the electric driving element.
Further, in the present embodiment, the temperature sensing element PT includes an NTC thermistor or a bimetal temperature switch, and preferably, the NTC thermistor or the bimetal temperature switch is disposed at one side of the high voltage switchgear or the electrical driving element in the high voltage switchgear and is in contact with the high voltage switchgear or the electrical driving element in the high voltage switchgear, and the NTC thermistor or the bimetal temperature switch can ensure that the temperature detecting device is in an open or insulated state before operation; the temperature sensing element PT of this embodiment is preferably a bimetallic temperature switch.
Further, in this embodiment, the alarm unit HL includes an alarm, a single chip, and a wireless transceiver module, the alarm and the wireless transceiver module are connected to an I/O pin of the single chip, and an alarm message is preset in the single chip, in this embodiment, the alarm message at least includes a loop where the high voltage switch device is located or a location where the high voltage switch device is located, and when in use, the alarm sends an interrupt signal to the singlechip while giving an audible and visual alarm, the singlechip triggers the wireless signal transceiver unit to enter a high-frequency working mode after receiving the interrupt signal, the wireless signal transceiver unit remotely sends alarm information preset in the singlechip to the monitoring terminal, the monitoring terminal can be a mobile terminal or a PC terminal, so that maintenance personnel can conveniently and accurately position and timely maintain the monitoring terminal, and the control module diagram of the alarm unit HL provided by the embodiment is shown in fig. 3.
The temperature detection device in the embodiment has a simple structure and low cost, the temperature detection device does not act at the normal temperature of the electric drive element in the high-voltage switch equipment or the high-voltage switch equipment and is in an insulation state, when the temperature of the detected high-voltage switch equipment or the electric drive element in the high-voltage switch equipment reaches the set temperature, the temperature sensing element PT acts, the action contact of the relay KA is attracted at the moment, the normally closed contact is disconnected to achieve the effect of protecting the control loop, and meanwhile, the normally open contact is closed to achieve the alarm function.
In the embodiment, the relay KA includes a set of coil pins a1, a2, a set of normally closed contacts 3, 4 and a set of normally open contacts 5, 6 to explain how the temperature detecting device is used:
before the temperature detection device is used, coil pins A1 and A2 in the temperature detection device are connected with a control power supply in a control loop, the control power supply can be a positive end and a negative end in a high-voltage switch device mechanism, meanwhile, normally closed contacts 3 and 4 in the temperature detection device are connected in series in the control loop where an electric drive element in the high-voltage switch device is located, finally, a bimetallic strip temperature switch is arranged on one side of the high-voltage switch device or the electric drive element in the high-voltage switch device and is contacted with each other, when the temperature detection device is used, when the temperature of the electric drive element in the high-voltage switch device is increased due to the fact that the high-voltage switch device is refused to operate or the control loop is abnormal, the bimetallic strip temperature switch senses the temperature change of the electric drive element, when the temperature of the electric drive element reaches a preset value, the bimetallic strip temperature switch operates to electrify a relay KA, meanwhile, the normally closed contacts 3 and 4 arranged in the control loop are disconnected to realize the disconnection of the control loop, the normally open contacts 5 and 6 connected with the alarm unit HL are closed to start the alarm unit HL to send out an alarm signal and transmit alarm information to the monitoring terminal, therefore, when the temperature detection device in the embodiment is used for sensing the temperature change of the electric drive element in the high-voltage switch device in the control loop, the control loop can be timely disconnected and the alarm signal and the alarm information are sent out, so that a maintainer can timely find out the abnormity, the hidden danger can be quickly processed under the condition of keeping the coil, the success rate of remote control operation is ensured, the sustainable power supply is ensured, namely, the temperature detection device in the embodiment can be timely cut off to avoid the problem that the existing control loop cannot be mechanically cut off to cause the long-time electrification of the electric drive element in the high-voltage switch device to cause the burning of the high-voltage switch, and then lead to the phenomenon of power failure or conflagration, send alarm signal and alarm information can make things convenient for staff accurate positioning and in time maintenance when cutting off the return circuit, and the temperature-detecting device restores to the former original state before the action when the interior electric drive element's of high-voltage switchgear temperature drops.
Further, in this embodiment, in order to implement permanent locking on the control circuit, it is preferable that the relay KA includes two sets of normally open contacts 5, 6 and 7, 8, one set of normally open contacts 5, 6 is connected to the alarm unit HL, and the other set of normally open contacts 7, 8 is connected in parallel to two ends of the temperature sensing element PT, see fig. 2; when the temperature sensing device is used, when the temperature sensing element PT senses that the temperature of an electric driving element in the high-voltage switch equipment rises to a preset temperature value, the temperature sensing element PT acts to enable the action contact on the relay KA to be attracted, meanwhile, the normally open contacts 5, 6 and 7, 8 are also attracted, and as the normally open contacts 7, 8 are connected with two ends of the temperature sensing element PT in parallel, the control loop where the high-voltage switch equipment is located is permanently disconnected when the normally open contacts 7, 8 are attracted.
Example 2:
the embodiment provides a circuit breaker, which comprises a switching-off coil and a switching-on coil, wherein a temperature detection device is arranged on the circuit breaker and comprises a temperature sensing element PT and a relay KA, the relay KA comprises coil pins, at least one group of normally closed contacts and at least one group of normally open contacts, and the coil pins are connected with a control power supply; the temperature sensing element PT is connected with the relay KA in series through a lead and is arranged on one side of the opening coil and/or the closing coil.
In this embodiment, in order to control the switching-on loop and the switching-off loop respectively, the preferred temperature detection device includes a set of relay KA and two sets of temperature sensing elements PT1 and PT2, wherein the relay KA preferably includes two sets of normally closed contacts, and the relay KA may select an intermediate relay according to actual needs, referring to fig. 4, a circuit diagram of the temperature detection device including two sets of temperature sensing elements PT and a set of relay KA in the switching-off loop provided in this embodiment is shown, in the circuit diagram, a relay KA contact a1 is connected to a positive end of a coil, a relay KA contact a2 is connected to a negative end of the coil, in this embodiment, two sets of temperature sensing elements PT1 and PT2 are connected in parallel and then connected in series with the coil of the relay KA, two sets of normally closed contacts KA1 and KA2 of the relay are connected in series in the switching-on loop and the switching-off loop respectively, and when in use, two sets of temperature sensing elements PT1 and, when the PT1 senses that the temperature of a closing coil rises to a preset temperature or the PT2 senses that the temperature of a separating coil rises to a preset temperature, the temperature sensing element PT1 or PT2 is closed to electrify the coil of the relay KA, the coil of the relay KA can be electrified to attract an action contact on the relay, the normally closed contacts KA1 and KA2 are disconnected to disconnect a score and closing loop, and the normally open contact is closed to realize alarm.
Of course, in the present embodiment, in order to control the switching-off circuit and the switching-on circuit respectively, it is preferable that the temperature detection device further includes two sets of relays KA1, KA2 and two sets of temperature sensing elements PT1 and PT2, wherein the relay KA1 and the temperature sensing element PT1 are disposed in the switching-on circuit, and the relays KA2 and PT2 are disposed in the switching-off circuit, as shown in fig. 5.
Further, in the present embodiment, the temperature sensing element PT includes an NTC thermistor or a bimetal temperature switch, and preferably, the NTC thermistor or the bimetal temperature switch is disposed at one side of the opening coil or the closing coil and is in contact with the opening coil and/or the closing coil, and the NTC thermistor or the bimetal temperature switch can ensure that the temperature detecting device is in an open or insulated state before operation.
Further, in this embodiment, the alarm unit HL includes an alarm, a single chip microcomputer and a wireless signal transceiver module, the alarm and the wireless signal transceiver module are connected to an I/O pin of the single chip microcomputer, and alarm information is preset in the single chip microcomputer.
The temperature detection device in the embodiment has a simple structure, a power supply is not needed to be independently arranged, the temperature detection device does not act at the normal temperature of the opening and closing coil by taking 110 plus 220vDC/AC voltage signals as control signals, the temperature detection device is in an insulation state, when the temperature of the opening and closing coil reaches the set temperature, the temperature sensing element PT acts, the action contact of the relay KA is attracted, the normally closed contact is disconnected to protect the control loop, and meanwhile, the normally open contact is closed to realize the alarm function, so that when the opening and closing coil of the circuit breaker exceeds the preset temperature, the control loop can be timely cut off, and an alarm signal and an alarm message can be simultaneously sent out, a maintainer can timely find abnormality, the hidden danger can be quickly processed under the condition of keeping the coil, the success rate of remote control operation is ensured, and the sustainable power supply is ensured, also use this circuit breaker in this embodiment, can in time cut off control circuit and avoid current control circuit can't the mechanical break-off to cause the divide-shut brake coil to be electrified for a long time and lead to circuit breaker and other electrical equipment in the control circuit to be burnt, and then lead to the phenomenon of having a power failure or conflagration, send alarm signal and alarm information when cutting off the return circuit and can make things convenient for staff accurate positioning and in time maintenance, divide equally, when closing coil's temperature drops temperature detection device will resume original state before the action.
Further, in this embodiment, in order to implement permanent locking on the control circuit where the circuit breaker is located, it is preferable that the relay KA includes two sets of normally open contacts 5, 6 and 7, 8, one set of normally open contacts 5, 6 is connected to the alarm unit HL, and the other set of normally open contacts 7, 8 is connected in parallel to two ends of the temperature sensing element PT; when the temperature sensing device is used, when the temperature sensing element PT senses that the temperature of the opening coil or the closing coil of the circuit breaker rises to a preset temperature value, the relay KA is electrified, the action contacts on the relay KA attract each other after the relay KA is electrified, meanwhile, the normally open contacts 5, 6 and 7 and 8 attract each other, and the normally open contacts 7 and 8 are connected with the two ends of the temperature sensing element PT in parallel, so that the loops of the opening coil and the closing coil are permanently disconnected when the normally open contacts 7 and 8 attract each other.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be pointed out that, for the person skilled in the art, without departing from the scope of the present invention, several improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effectiveness of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application is to be construed in accordance with the substance of the claims and its descriptive matter.
Claims (10)
1. The temperature detection device capable of automatically cutting off the control loop is characterized by comprising a temperature sensing element PT and a relay KA, wherein the relay KA comprises a coil pin, at least one group of normally closed contacts and at least one group of normally open contacts, the coil pin can be connected with a control power supply, the normally closed contacts can be connected in series in the control loop where an electric driving element in high-voltage switch equipment is located, and the normally open contacts are connected with an alarm unit HL; the temperature sensing element PT is connected with the relay KA in series through a lead, and is arranged on one side of the high-voltage switch equipment or an electric driving element in the high-voltage switch equipment and used for detecting the current temperature of the electric driving element.
2. The temperature detecting device capable of automatically cutting off the control loop according to claim 1, wherein the relay KA comprises two sets of normally open contacts, one set of normally open contacts is connected with the alarm unit HL, and the other set of normally open contacts is connected in parallel with two ends of the temperature sensing element PT.
3. The temperature detecting device capable of automatically cutting off the control loop according to claim 1 or 2, wherein the alarm unit HL comprises an alarm, a single chip microcomputer and a wireless signal transceiver module, the alarm and the wireless signal transceiver module are connected with an I/O pin of the single chip microcomputer, and alarm information is preset in the single chip microcomputer.
4. The apparatus for detecting temperature capable of automatically breaking a control loop according to claim 1 or 2, wherein the temperature sensing element PT comprises an NTC thermistor or a bimetal temperature switch.
5. The apparatus for detecting temperature of automatically breaking control loop according to claim 3, wherein said temperature sensing element PT comprises NTC thermistor or bimetal temperature switch.
6. A circuit breaker comprises a switching-off coil and a switching-on coil and is characterized in that a temperature detection device is arranged, the temperature detection device comprises a temperature sensing element PT and a relay KA, the relay KA comprises coil pins, at least one group of normally closed contacts and at least one group of normally open contacts, the coil pins are connected with a control power supply, and the normally closed contacts are connected in series in a switching-off coil loop and/or a switching-on coil loop; the normally open contact is connected with an alarm unit HL; the temperature sensing element PT is connected with the relay KA in series through a lead and is arranged on one side of the opening coil and/or the closing coil.
7. The circuit breaker according to claim 6, characterized in that the relay KA comprises two sets of normally open contacts, one set of normally open contacts is connected with the alarm unit HL, and the other set of normally open contacts is connected in parallel with two ends of the temperature sensing element PT.
8. The circuit breaker according to claim 6 or 7, characterized in that the alarm unit HL comprises an alarm, a single chip microcomputer and a wireless signal transceiver module, the alarm and the wireless signal transceiver module are connected with an I/O pin of the single chip microcomputer, and alarm information is preset in the single chip microcomputer.
9. The circuit breaker according to claim 6 or 7, characterized in that said temperature-sensitive element PT comprises an NTC thermistor or a bimetallic temperature switch.
10. The circuit breaker of claim 8, wherein the temperature sensing element PT comprises an NTC thermistor or a bimetal temperature switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921100200.9U CN210092862U (en) | 2019-07-12 | 2019-07-12 | Temperature detection device capable of automatically cutting off control loop and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921100200.9U CN210092862U (en) | 2019-07-12 | 2019-07-12 | Temperature detection device capable of automatically cutting off control loop and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210092862U true CN210092862U (en) | 2020-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921100200.9U Withdrawn - After Issue CN210092862U (en) | 2019-07-12 | 2019-07-12 | Temperature detection device capable of automatically cutting off control loop and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210092862U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112954987A (en) * | 2021-04-12 | 2021-06-11 | 南通通明集团有限公司 | Emergency cut-off device |
-
2019
- 2019-07-12 CN CN201921100200.9U patent/CN210092862U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112954987A (en) * | 2021-04-12 | 2021-06-11 | 南通通明集团有限公司 | Emergency cut-off device |
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