CN215646161U - Transformer net door locking control circuit - Google Patents
Transformer net door locking control circuit Download PDFInfo
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- CN215646161U CN215646161U CN202121721291.5U CN202121721291U CN215646161U CN 215646161 U CN215646161 U CN 215646161U CN 202121721291 U CN202121721291 U CN 202121721291U CN 215646161 U CN215646161 U CN 215646161U
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Abstract
The utility model discloses a transformer net door locking control circuit, which comprises: a plurality of transformer low voltage phase lines; a zero-phase line; a plurality of low voltage fuses; two intermediate relays; an electromagnetic lock; each phase line in the transformer low-voltage phase line is connected with a fuse, each intermediate relay is provided with a normally open contact and a normally closed contact respectively, each transformer low-voltage phase line is connected with the normally open contact and/or the normally closed contact, and each transformer low-voltage phase line is connected with an electromagnetic lock and a zero phase. The control circuit avoids the condition that the transformer net door is opened when one phase or multiple phases are in phase loss in a mode of supplying power to the electromagnetic lock through the multi-phase circuit.
Description
Technical Field
The utility model relates to a transformer technical field, in particular to transformer net door shutting control circuit.
Background
At present, almost all domestic power distribution rooms are provided with transformers, and transformer rooms are provided with net doors, so that people can be prevented from entering the transformer by mistake when the transformer is electrified, and electric shock accidents are caused. Therefore, how to safely and effectively set up the net door locking becomes a key problem for preventing non-workers from entering the electrified interval by mistake to cause accidents. The traditional network gate locking mode is that an electrified locking type electromagnetic lock is adopted, for example, the power supply of the electromagnetic lock is AC220V, any phase of ABC three phases on the low-voltage side of a transformer is taken as a phase line, and N phases are taken as a zero line, as shown in figure 1, when power transmission is completed on the high-voltage side, the A phase and the N phase on the low-voltage side of the transformer can output an AC220V phase voltage to the electromagnetic lock, and after the electromagnetic lock is electrified, the electromagnetic lock can be automatically locked to lock the network gate of the transformer. When the high-voltage side of the transformer loses power, power supplies at two ends of the electromagnetic lock disappear, the electromagnetic lock can be unlocked, and the net door can be opened. Although this simple locking method can play a role of locking the net door under the normal power supply condition, the locking function can not be effectively realized under several conditions:
1. when the high-voltage side is in phase loss, when the power ends of the electromagnetic lock are independently connected with the phase A, the phase B and the phase C of the low-voltage side of the transformer, and the phase is just in phase loss, the electromagnetic lock can be unlocked, and the transformer gate can be opened;
2. the low-voltage fuse circuit is used as a quick-wear part, when the control circuit low-voltage fuse is fused, the electromagnetic lock can be unlocked, and the transformer mesh door can be opened.
SUMMERY OF THE UTILITY MODEL
One of the objectives of the present invention is to provide a transformer gate locking control circuit, which avoids the situation that a transformer gate is opened when one or more phases are out of phase by using a multi-phase circuit to supply power to an electromagnetic lock.
The utility model also aims to provide a transformer gate locking control circuit, wherein each phase of the control circuit is provided with a low-voltage fuse, so that the condition that an electromagnetic lock can be unlocked when the low-voltage fuse of one phase or two phases of control circuits is fused can be avoided.
To achieve at least one of the above objects, the present invention further provides a transformer gate locking control circuit, including:
a plurality of transformer low voltage phase lines;
a zero-phase line;
a plurality of low voltage fuses;
two intermediate relays;
an electromagnetic lock;
each phase line in the transformer low-voltage phase line is connected with a fuse, each intermediate relay is provided with a normally open contact and a normally closed contact respectively, each transformer low-voltage phase line is connected with the normally open contact and/or the normally closed contact, and each transformer low-voltage phase line is connected with an electromagnetic lock and a zero phase.
According to a preferred embodiment of the present invention, the low-voltage phase line of the transformer includes a first phase line, a second phase line and a third phase line, wherein the first phase line, the second phase line and the third phase line are respectively connected to the electromagnetic lock.
According to a preferred embodiment of the present invention, the intermediate relay includes a first intermediate relay and a second intermediate relay, wherein the first intermediate relay and the second intermediate relay have a normally open contact and a normally closed contact, respectively.
According to one preferred embodiment of the present invention, the first phase line is connected to the normally closed contact of the first intermediate relay and the normally closed contact of the second intermediate relay.
According to a preferred embodiment of the present invention, the second phase line is connected to the normally closed contact of the first intermediate relay and to the normally open contact of the second intermediate relay.
According to a preferred embodiment of the present invention, the third phase line is connected to the normally open contact of the first intermediate relay.
According to a preferred embodiment of the present invention, the second phase line is connected between the first phase line and the third phase line.
According to a preferred embodiment of the present invention, the first phase line, the second phase line and the third phase line are respectively connected to an input terminal of the electromagnetic lock, and an output terminal of the electromagnetic lock is connected to the zero-phase line.
According to one preferred embodiment of the present invention, the input voltage of the electromagnetic lock is 220V.
According to a preferred embodiment of the present invention, the first phase line, the second phase line and the third phase line are respectively connected to a low-voltage fuse.
Drawings
Fig. 1 shows a schematic connection structure of a preferred embodiment of a transformer gate latch control circuit according to the present invention.
Wherein the content of the first and second substances,
first phase line-A, second phase line-B, third phase line-C, zero phase line-N, first intermediate relay-10, first intermediate relay normally closed contact-11, first intermediate relay normally open contact-12, second intermediate relay-20, second intermediate relay normally closed contact-21, second intermediate relay normally open contact-22, first fuse-FU 1, second fuse-FU 2, third fuse-FU 3, electromagnetic lock-30
Detailed Description
The following description is presented to disclose the utility model so as to enable any person skilled in the art to practice the utility model. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the utility model, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
Referring to the schematic diagram shown in fig. 1, the transformer gate latch control circuit provided by the present invention includes, but is not limited to, the structure shown in the schematic diagram. Specifically, control circuit includes a plurality of transformer low pressure phase lines, including first phase line, second phase line, third phase line and zero phase line, corresponds to A phase line, B phase line, C phase line and N phase line in the schematic diagram respectively, wherein first phase line, second phase line and third phase line are connected the electromagnetic lock respectively, just first phase line, second phase line and third phase line are connected auxiliary relay for control other phase lines and the switching on between electromagnetic lock and the zero phase line when one of them phase line disappears the short circuit, thereby make the electromagnetic lock can not lead to the unblock phenomenon because of the phase line disconnection. The first phase line is connected with the first low-voltage fuse, the second phase line is connected with the second low-voltage fuse, and the third phase line is connected with the third low-voltage fuse.
Wherein intermediate relay includes first intermediate relay and second intermediate relay, wherein first intermediate relay, second intermediate relay have a normally open contact and a normally closed contact respectively, first phase line is connected first intermediate relay's normally closed contact and second intermediate relay's normally open contact, just first intermediate relay connects the electromagnetic lock, the zero line is connected to the electromagnetic lock output, makes constitute a return circuit between first phase line, above-mentioned two intermediate relays, electromagnetic lock and the zero line. The second phase line is connected with the normally open contact of the second intermediate relay and the normally closed contact of the first intermediate relay, the second phase line is further connected with the input end of the electromagnetic lock, and the second phase line, the two intermediate relay electromagnetic locks and the zero phase line form a loop. The third phase line is connected with a normally open contact of the first intermediate relay, and a loop is formed among the third phase line, the first intermediate relay, the electromagnetic lock and the zero phase line.
In order to better illustrate the technical effect of the present invention on the connection structure, the present invention explains the technical effect of the present invention with respect to a scene in which different phase line breaks disappear. Specifically, the method comprises the following steps:
when first phase line takes place to lack the looks, the second phase line and the third phase line of transformer low pressure side are got electric simultaneously, and first intermediate relay's coil is got electric, just second intermediate relay's coil is got electric, first intermediate relay's normally open contact is closed, first intermediate relay's normally closed contact disconnection, second intermediate relay's normally open contact is closed, second intermediate relay's normally closed contact disconnection to make transformer low pressure side's third phase line and zero phase line switch on, electromagnetic lock DSN shutting.
When the second phase line is in phase loss, the first phase line and the third phase line on the low-voltage side of the transformer are simultaneously electrified, the coil of the first intermediate relay is electrified, the normally open contact of the first intermediate relay is closed, and the normally closed contact of the first intermediate relay is opened. The second intermediate relay is not electrified, so that the normally open contact of the second intermediate relay does not act, the normally closed contact of the second intermediate relay does not act, the third phase line of the low-voltage side of the transformer and the zero phase line are conducted at the moment, and the electromagnetic lock DSN is locked.
When the third phase line is in phase failure, the first phase line and the second phase line on the low-voltage side of the transformer are simultaneously electrified, and the first intermediate relay is not electrified, so that the normally open contact of the first intermediate relay does not act, and the normally closed contact of the first intermediate relay does not act. And the coil of the second intermediate relay is electrified, the normally open contact of the second intermediate relay is closed, and the normally closed contact of the second intermediate relay is disconnected. At the moment, a second phase line and a zero phase line loop of the low-voltage side of the transformer are conducted, and the electromagnetic lock DSN is locked.
When the first phase line and the second phase line are in phase loss, the third phase line on the low-voltage side of the transformer is electrified, the coil of the first intermediate relay is electrified, the normally open contact of the first intermediate relay is closed, and the normally closed contact of the first intermediate relay is opened. The second intermediate relay is not electrified, so that the normally open contact of the second intermediate relay does not act, the normally closed contact of the second intermediate relay does not act, the third phase line and the zero phase line on the low-voltage side of the transformer are conducted at the moment, and the electromagnetic lock DSN is locked.
When the first phase line and the third phase line are in phase failure, the second phase line on the low-voltage side of the transformer is electrified, and the first intermediate relay is not electrified, so that the normally open contact of the first intermediate relay does not act, and the normally closed contact of the first intermediate relay does not act. And the coil of the second intermediate relay is electrified, the normally open contact of the second intermediate relay is closed, and the normally closed contact of the second intermediate relay is disconnected. At the moment, a second phase line and a zero phase line loop of the low-voltage side of the transformer are conducted, and the electromagnetic lock DSN is locked.
When the second phase line and the third phase line are in phase failure, the first phase line on the low-voltage side of the transformer is electrified, the first intermediate relay is not electrified, and therefore the normally open contact of the first intermediate relay does not act, and the normally closed contact of the first intermediate relay does not act. The second intermediate relay is not electrified, so that the normally open contact of the second intermediate relay does not act, the normally closed contact of the second intermediate relay does not act, the first phase line and the zero phase line on the low-voltage side of the transformer are conducted at the moment, and the electromagnetic lock DSN is locked.
Work as first phase line, second phase line and the equal normal during operation of third phase line, first phase line, second phase line and third phase line all get electric, and first auxiliary relay's coil gets electric, first auxiliary relay's normally open contact is closed, first auxiliary relay's normally closed contact disconnection. And the coil of the second intermediate relay is electrified, the normally open contact of the second intermediate relay is closed, and the normally closed contact of the second intermediate relay is disconnected. At the moment, a third phase line and a zero phase line loop on the low-voltage side of the transformer are conducted, and the electromagnetic lock DSN is locked.
The beneficial effects of the circuit structure of the present invention can be clearly explained through the above description of 7 scenarios, and the implementation manner is the function of the electric element itself.
It will be understood by those skilled in the art that the embodiments of the present invention described above and illustrated in the drawings are given by way of example only and not by way of limitation, the objects of the utility model having been fully and effectively achieved, the functional and structural principles of the present invention having been shown and described in the embodiments, and that various changes or modifications may be made in the embodiments of the present invention without departing from such principles.
Claims (10)
1. A transformer gate latching control circuit, comprising:
a plurality of transformer low voltage phase lines;
a zero-phase line;
a plurality of low voltage fuses;
two intermediate relays;
an electromagnetic lock;
each phase line in the transformer low-voltage phase line is connected with a fuse, each intermediate relay is provided with a normally open contact and a normally closed contact respectively, each transformer low-voltage phase line is connected with the normally open contact and/or the normally closed contact, and each transformer low-voltage phase line is connected with an electromagnetic lock and a zero phase.
2. The transformer gate latching control circuit of claim 1, wherein the transformer low voltage phase lines comprise a first phase line, a second phase line and a third phase line, wherein the first phase line, the second phase line and the third phase line are respectively connected to the electromagnetic lock.
3. The transformer gate latching control circuit of claim 2, wherein the intermediate relay comprises a first intermediate relay and a second intermediate relay, wherein the first intermediate relay and the second intermediate relay have a normally open contact and a normally closed contact, respectively.
4. A transformer gate latching control circuit as claimed in claim 3 wherein said first phase line connects said normally closed contact of said first intermediate relay and said normally closed contact of said second intermediate relay.
5. A transformer gate latching control circuit as claimed in claim 3, wherein said second phase line is connected to the normally closed contact of said first intermediate relay and to the normally open contact of said second intermediate relay.
6. A transformer gate latching control circuit according to claim 3, wherein the third phase line is connected to the normally open contact of the first intermediate relay.
7. A transformer gate latching control circuit according to claim 3, wherein the second phase line is connected between the first phase line and the third phase line.
8. The transformer gate locking control circuit according to claim 2, wherein the first phase line, the second phase line and the third phase line are respectively connected to an input end of the electromagnetic lock, and an output end of the electromagnetic lock is connected to the zero phase line.
9. The transformer gate lock control circuit of claim 1, wherein the input voltage of the electromagnetic lock is 220V.
10. The transformer grid door latch control circuit according to claim 2, wherein the first phase line, the second phase line and the third phase line are each connected to a low voltage fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121721291.5U CN215646161U (en) | 2021-07-27 | 2021-07-27 | Transformer net door locking control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121721291.5U CN215646161U (en) | 2021-07-27 | 2021-07-27 | Transformer net door locking control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215646161U true CN215646161U (en) | 2022-01-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121721291.5U Active CN215646161U (en) | 2021-07-27 | 2021-07-27 | Transformer net door locking control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215646161U (en) |
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2021
- 2021-07-27 CN CN202121721291.5U patent/CN215646161U/en active Active
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