CN112271694A - Air switch capable of preventing false tripping - Google Patents
Air switch capable of preventing false tripping Download PDFInfo
- Publication number
- CN112271694A CN112271694A CN202011281703.8A CN202011281703A CN112271694A CN 112271694 A CN112271694 A CN 112271694A CN 202011281703 A CN202011281703 A CN 202011281703A CN 112271694 A CN112271694 A CN 112271694A
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- Prior art keywords
- temperature
- switch
- tripping
- temperature switch
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000011664 signaling Effects 0.000 claims description 8
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- Thermally Actuated Switches (AREA)
Abstract
The invention discloses an air switch capable of preventing false tripping, and belongs to the technical field of switches. The device comprises a main tripper, an auxiliary tripper, a temperature switch and a transmitting temperature switch; the main release is connected in series in the controlled circuit; the auxiliary release is connected with the main release in parallel, the temperature switch is connected with the auxiliary release in series, and the temperature switch is a normally open contact temperature switch; the temperature sensing part of the transmitting temperature switch is contacted with the main trip unit, and the contact of the transmitting temperature switch is connected with the signal alarm loop of the external equipment in series. The air switch not only overcomes the sensitivity of the existing air switch to the ambient temperature, reduces the risk of false tripping in a high-temperature environment to the minimum, but also can give out early warning in advance, so that a worker can acquire the information of possible tripping in advance, and equipment accidents caused by sudden tripping are avoided.
Description
Technical Field
The invention relates to an air switch capable of preventing false tripping, and belongs to the technical field of switches.
Background
The air switch is one of the core elements of an auxiliary power system of a power plant and is a basic element for ensuring the normal operation of various auxiliary machines. Because the service power system is low in voltage level and multiple in components, especially the air switch rarely detects the technical characteristics of the service power system, the detection method is not comprehensive enough, and when the service power system is used in summer or in a hot environment, the technical characteristics of the air switch are unstable, and the phenomenon of false tripping can happen suddenly. In high-temperature seasons such as summer and the like, accidents of power loss of important auxiliary machines due to sudden and error tripping of the air switch occur occasionally. If the air switch can overcome the influence of a high-temperature environment, the air switch can not be tripped mistakenly in the high-temperature environment, and can give an early warning before the possibility of tripping occurs, so that the reliability and the economical efficiency of the operation of the power plant unit can be greatly improved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a prevent mistake tripping operation air switch, it has solved air switch can appear not having the mistake tripping operation problem of early warning in high temperature environment.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
an air switch for preventing error tripping comprises a main tripper, an auxiliary tripper, a temperature switch and a transmitting temperature switch;
the main release is connected in series in the controlled circuit;
the auxiliary release is connected with the main release in parallel, the temperature switch is connected with the auxiliary release in series, and the temperature switch is a normally open contact temperature switch;
the temperature sensing part of the transmitting temperature switch is contacted with the main trip unit, and the contact of the transmitting temperature switch is connected with the signal alarm loop of the external equipment in series.
As a preferred example, the action temperature of the temperature switch is 40-50 ℃, and the temperature switch allows the passing current to be not lower than the rated current of the auxiliary release.
As a preferred example, the actuation temperature of the signaling temperature switch is 80-120 ℃.
As a preferred example, the trip current of the auxiliary trip is 20-30% of the trip current of the main trip.
The invention has the beneficial effects that:
(1) the hidden danger of high-temperature tripping is overcome: the auxiliary release is matched with the temperature switch, when the ambient temperature is higher, the temperature switch is switched on, and the auxiliary release and the main release work in parallel, so that the sensitivity of the conventional air switch to the ambient temperature is overcome, and the risk of false tripping in a high-temperature environment is reduced to the minimum;
(2) the trip early warning capability is provided: based on the air switch thermal tripping principle, the tripping process of the air switch thermal tripping device is dependent on temperature, the air switch thermal tripping device can trip only when the temperature of the tripping device reaches the temperature above 80 ℃, the temperature sensing part of the signaling temperature switch is contacted with the main tripping device, and early warning is sent out in advance before the temperature of the main tripping device rises to be close to the tripping temperature, so that a worker can obtain possible tripping information in advance, and equipment accidents caused by sudden tripping are avoided.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: the intelligent tripping device comprises a main tripping device 1, an auxiliary tripping device 2, a temperature switch 3, a transmitting temperature switch 4, a controlled circuit 5 and an alarm loop 6.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the invention easy to understand, the invention is further described with reference to the specific drawings.
As shown in fig. 1, an air switch for preventing false tripping comprises a main trip unit 1, an auxiliary trip unit 2, a temperature switch 3 and a signaling temperature switch 4;
the main release 1 is connected in series in the controlled circuit 5;
the auxiliary release 2 is connected with the main release 1 in parallel, the temperature switch 3 is connected with the auxiliary release 2 in series, and the temperature switch 3 is a normally open contact temperature switch;
the temperature sensing part of the transmitting temperature switch 4 is contacted with the main trip 1, and the contact of the transmitting temperature switch 4 is connected with the external equipment signal alarm circuit 6 in series.
The action temperature of the temperature switch 3 is 40-50 ℃, and the temperature switch 3 allows the current not to be lower than the rated current of the auxiliary release 2.
The operating temperature of the signalling temperature switch 4 is 80-120 ℃.
The trip current of the auxiliary release 2 is 20-30% of the trip current of the main release 1. The auxiliary release 2 does not interfere with the normal function of the main release 1.
The working principle is as follows:
(1) the hidden danger of high-temperature tripping is overcome: the auxiliary release 2 is matched with the temperature switch 3, when the environmental temperature is higher (40-50 ℃), the temperature switch 3 is switched on, the auxiliary release 2 and the main release 1 work in parallel, and therefore the tripping current of the whole switch is increased, the air switch can trip only by needing higher current under the high-temperature condition, the sensitivity of the existing air switch to the environmental temperature is overcome, and the risk of false tripping of the air switch under the high-temperature environment is reduced to the minimum;
(2) the trip early warning capability is provided: based on the air switch thermal tripping principle, the tripping process of the air switch thermal tripping device depends on the temperature, and the air switch thermal tripping device can trip only when the temperature of the tripping device reaches the temperature of more than 80 ℃.
The temperature sensing part of the transmitting temperature switch 4 is contacted with the main trip unit 1, and before the temperature of the main trip unit 1 rises to be close to the trip temperature (for example, the trip temperature of the main trip unit 1 is 100 ℃, the transmitting temperature switch 4 detects that the temperature of the main trip unit 1 rises to 80 ℃, namely, the transmitting temperature switch 4 is triggered to transmit an early warning signal), early warning is transmitted in advance, so that a worker can acquire possible trip information in advance, and equipment accidents caused after sudden trip are avoided.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. An air switch for preventing false tripping is characterized by comprising a main tripper (1), an auxiliary tripper (2), a temperature switch (3) and a signaling temperature switch (4);
the main release (1) is connected in series in a controlled circuit (5);
the auxiliary release (2) is connected with the main release (1) in parallel, the temperature switch (3) is connected with the auxiliary release (2) in series, and the temperature switch (3) is a normally open contact temperature switch;
the temperature sensing part of the signaling temperature switch (4) is contacted with the main trip unit (1), and the contact of the signaling temperature switch (4) is connected with the external equipment signal alarm loop (6) in series.
2. An air switch against false tripping according to claim 1, characterized in that the action temperature of the temperature switch (3) is 40-50 ℃, and the temperature switch (3) allows the current not to be lower than the rated current of the auxiliary release (2).
3. An air switch against false tripping according to claim 1, characterized in that the actuation temperature of the signaling temperature switch (4) is 80-120 ℃.
4. An air switch against incorrect tripping, as claimed in claim 1, characterized in that the tripping current of the auxiliary release (2) is 20-30% of the tripping current of the main release (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011281703.8A CN112271694A (en) | 2020-11-16 | 2020-11-16 | Air switch capable of preventing false tripping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011281703.8A CN112271694A (en) | 2020-11-16 | 2020-11-16 | Air switch capable of preventing false tripping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112271694A true CN112271694A (en) | 2021-01-26 |
Family
ID=74340636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011281703.8A Pending CN112271694A (en) | 2020-11-16 | 2020-11-16 | Air switch capable of preventing false tripping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112271694A (en) |
-
2020
- 2020-11-16 CN CN202011281703.8A patent/CN112271694A/en active Pending
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