CN211654554U - Load self-diagnosis protection device for dry-type transformer - Google Patents

Abstract

The utility model discloses a dry-type transformer load self-diagnosis protection device, including the transformer main part, be equipped with iron core and winding on the iron core in the transformer main part, self-diagnosis protection device still includes normally closed temperature switch, ac contactor. The normally closed temperature switch is provided with a temperature sensor and a winding which is connected in series with the temperature sensor. The alternating current contactor is connected in series with an input control end or an output control end of the winding and is electrically connected with the normally closed temperature switch, the normally open/normally closed conversion of the normally closed temperature switch is used as a signal given medium of the alternating current contactor, the temperature of the winding is further monitored in real time, and a detection circuit detects the abnormity of the signal and directly controls the on-off of the alternating current contactor. The utility model discloses a self-diagnosis protection device can self-diagnose whether operating temperature is too high or the load is too big by self-diagnosis transformer self to use self-protection and rear end power consumption protection to carry out input side or output side disconnection power supply as the purpose.

Description

Load self-diagnosis protection device for dry-type transformer

Technical Field

The utility model relates to a dry-type transformer technical field, specific saying so relates to a dry-type transformer load self-diagnosis protection device.

Background

At present, dry-type transformers without external protection control used in a plurality of industries such as automatic control, intelligent mechanical equipment, low-voltage power distribution and the like all belong to uncontrolled power supply.

The main frequency low voltage dry type transformer is divided into a self-coupling dry type transformer and an isolation dry type transformer according to the electromagnetic coupling principle. The electric power supply structure is divided into a single-phase dry type transformer and a three-phase dry type transformer. The self-coupling dry type transformer, the isolation dry type transformer, the single-phase dry type transformer and the three-phase dry type transformer are all composed of coil windings and silicon rigid magnets.

The uncontrolled application of the dry-type transformer has a great risk, and generally, the voltage of the power supply input side deviates from the rated input voltage level or the load side is longer than the capacity of the transformer, so that the transformer is damaged more frequently, and more seriously, the equipment at the back end of the load is damaged and abnormal.

Therefore, it is necessary to provide a protection device on the dry-type transformer to solve the above-mentioned technical problems.

SUMMERY OF THE UTILITY MODEL

To the not enough among the prior art, the to-be-solved technical problem of the utility model lies in providing a dry-type transformer load self-diagnosis protection device, thereby the purpose of designing this dry-type transformer load self-diagnosis protection device is the hidden danger that manual or non-human factor changes electric environment and power consumption quality and causes in solving the transformer use.

In order to solve the technical problem, the utility model discloses a following scheme realizes: the utility model discloses a dry-type transformer load self-diagnosis protection device, including the transformer main part, be equipped with in the transformer main part iron core and coiling in winding on the iron core, self-diagnosis protection device still includes:

the reset type normally closed temperature switch is arranged on the transformer main body, a temperature sensor is arranged on the reset type normally closed temperature switch, and the normally closed temperature switch is connected with the winding in series;

and the external alternating current contactor is connected in series with the input control end or the output control end of the winding and is electrically connected with the normally closed temperature switch, the normally open/normally closed conversion of the normally closed temperature switch is used as a signal given medium of the alternating current contactor, the temperature of the winding is further monitored in real time, and the on-off of the alternating current contactor is directly controlled by a detection circuit when the detection circuit detects the abnormity of the signal.

Further, when the transformer main body is a single-phase transformer and the rated current is less than 20A, the mounting structure of the protection device is as follows:

the normally closed temperature switch is connected in series with the single-phase primary winding, the suspended end of the normally closed temperature switch serves as the input end of the single-phase transformer, and the iron core is grounded.

Further, when the transformer main body is a single-phase self-coupling transformer and the rated current is less than 20A, the mounting structure of the protection device is as follows:

the normally closed temperature switch is fixed on the single-phase secondary winding and fixed through the insulating layer, and is connected with the single-phase secondary winding in series, wherein the iron core is grounded.

Further, when the transformer main body is a three-phase transformer and the rated current is greater than 20A, the mounting structure of the protection device is as follows:

be equipped with three-phase primary, three-phase secondary and insulating layer on the iron core, the insulating layer internal fixation normally closed temperature switch, normally closed temperature switch is equipped with three groups and corresponds fixes three of three-phase secondary's portion, three groups normally closed temperature switch establishes ties, and two lead-out wires after its series connection are connected to alternating current contactor's coil signal control point.

Furthermore, a heat dissipation channel is arranged on the three-phase transformer.

Further, when the transformer main body is a three-phase self-coupling transformer and the rated current is greater than 20A, the mounting structure of the protection device is as follows:

be equipped with three-phase primary, three-phase secondary and insulating layer on the iron core, the insulating layer internal fixation normally closed temperature switch, normally closed temperature switch is equipped with three groups and corresponds fixes three of three-phase secondary's portion, three groups normally closed temperature switch establishes ties, and two lead-out wires after its series connection are connected to alternating current contactor's coil signal control point.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a self-diagnosis protection device is based on single, the changeable and uncontrolled reality situation of three-phase dry-type transformer load environment, can self-diagnosis transformer self whether operating temperature is too high or the load is too big to carry out input side or output side disconnection power supply with self-protection and rear end power consumption protection as the purpose.

Drawings

Fig. 1 is a schematic structural diagram of a single-phase primary winding wound by a single-phase transformer in embodiment 2 of the present invention.

Fig. 2 is a schematic structural diagram of a single-phase transformer in embodiment 2 of the present invention after a normally closed temperature switch is installed.

Fig. 3 is an electrical schematic diagram of the single-phase transformer in embodiment 2 of the present invention after being installed.

Fig. 4 is a schematic structural diagram of a single-phase self-coupled transformer according to embodiment 3 of the present invention after installation.

Fig. 5 is a schematic structural diagram of a three-phase primary coil wound by a three-phase transformer in embodiment 4 of the present invention.

Fig. 6 is a schematic structural diagram of a three-phase transformer in embodiment 4 after a normally closed temperature switch is installed.

Fig. 7 is a schematic structural diagram of the ac contactor connected to the three-phase transformer in embodiment 4 after the installation is completed.

Fig. 8 is a schematic structural diagram of a three-phase self-coupled transformer according to embodiment 5 of the present invention after installation.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making more clear and definite definitions of the protection scope of the present invention. It is obvious that the described embodiments of the invention are only some of the embodiments of the invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

In order to solve the problems in the prior art, the utility model discloses the safeguard measure of research and development carries out temperature real-time supervision on the winding to the operating temperature of transformer diagnoses its operating condition.

Embodiment 1, the utility model discloses a specific structure as follows:

the utility model provides a dry-type transformer load self-diagnosis protection device, includes the transformer main part, be equipped with the iron core in the transformer main part and coil in winding 1 on the iron core, self-diagnosis protection device still includes:

a reset type normally closed temperature switch 2 arranged on the transformer main body, wherein a temperature sensor is arranged on the reset type normally closed temperature switch 2, and the normally closed temperature switch 2 is connected with the winding in series;

and the external alternating current contactor is connected in series with the input control or output control end of the winding and is electrically connected with the normally closed temperature switch 2, the normally open/normally closed conversion of the normally closed temperature switch 2 is used as a signal given medium of the alternating current contactor, the temperature of the winding is further monitored in real time, and the on-off of the alternating current contactor is directly controlled by a detection circuit when the detection circuit detects the abnormity of the signal.

Example 2:

as shown in fig. 1 to 3, when the transformer main body is a single-phase transformer and the rated current is less than 20A, the mounting structure of the protection device is as follows:

the iron core is provided with a single-phase primary winding, a single-phase secondary winding and an insulating layer, the normally closed temperature switch 2 is fixed when the inter-turn insulating layer is wound, the normally closed temperature switch 2 is connected with the single-phase primary winding in series, the suspended end of the normally closed temperature switch is used as the input end of the single-phase transformer, and the iron core is grounded.

The single-phase transformer is installed by the following specific steps:

step one, winding the single-phase primary winding and stopping, as shown in figure 1;

winding an inter-turn insulating layer, and fixing the normally-closed temperature switch 2 as shown in fig. 2;

step three, winding the insulating layer again, and then winding the single-phase secondary winding;

and step four, after the assembly of the single-phase transformer is finished, the normally-closed temperature switch 2 is connected in series into the single-phase primary winding, and the suspended end is used as the input end of the single-phase transformer, as shown in fig. 3.

Example 3:

as shown in fig. 4, when the transformer main body is a single-phase self-coupled transformer and the rated current is less than 20A, the mounting structure of the protection device is as follows:

the normally closed temperature switch 2 is fixed on the single-phase secondary winding and fixed through the insulating layer, the normally closed temperature switch 2 is connected with the single-phase secondary winding in series, and the iron core is grounded.

The assembly procedure of the single-phase self-coupled transformer in example 3 is the same as that in example 2.

Example 4:

as shown in fig. 5 to 7, when the transformer main body is a three-phase transformer and the rated current is greater than 20A, the mounting structure of the protection device is as follows:

be equipped with three-phase primary, three-phase secondary and insulating layer on the iron core, the insulating layer internal fixation normally closed temperature switch 2, normally closed temperature switch 2 is equipped with three groups and corresponds fixes three winding portions, three groups of three-phase secondary 2 establishes ties normally closed temperature switch, and two lead-out wires after its series connection are connected to alternating current contactor's coil signal control point.

A preferred technical solution of this embodiment: and a heat dissipation channel is arranged on the three-phase transformer.

The three-phase transformer of the embodiment 4 has the following specific assembling steps:

winding a three-phase primary winding and making an insulating layer, as shown in figure 5;

fixing the normally closed temperature switch 2, and then making a heat dissipation channel as shown in fig. 6;

and step three, finally, winding of a three-phase secondary winding is completed, and after the three-phase transformer is assembled, two outgoing lines of the normally-closed temperature switch 2 are connected to coil signal control points of the alternating current contactor. As shown in fig. 7.

Example 5:

as shown in fig. 8, when the transformer main body is a three-phase self-coupled transformer and the rated current is greater than 20A, the mounting structure of the protection device is as follows:

be equipped with three-phase primary, three-phase secondary and insulating layer on the iron core, the insulating layer internal fixation normally closed temperature switch 2, normally closed temperature switch 2 is equipped with three groups and corresponds fixes three winding portions, three groups of three-phase secondary 2 establishes ties normally closed temperature switch, and two lead-out wires after its series connection are connected to alternating current contactor's coil signal control point.

The three-phase self-coupled transformer assembly process of example 5 is the same as the three-phase transformer assembly process of example 4.

In summary, in the manufacturing process of the transformer, 2 transformer connection structures can be selected according to the magnitude of the working current: the first is to directly reserve the wiring end of the normally closed temperature switch 2, and the second is to install the protection of the inlet wire or the outlet wire of the alternating current contactor on the transformer.

The utility model discloses the transformer adopts from restoring to throne normally closed temperature switch (operating current < 20A) to establish ties in the winding, perhaps (operating current > 20A) coiling between the winding layer or the primary level of winding, external ac contactor concatenates input control or output control, give the medium with temperature switch normally open/normally closed conversion as ac contactor's signal, thereby realize the real-time supervision of transformer self temperature, whether detecting signal's unusual direct control ac contactor's break-make, and then accomplish the protection of transformer self operation.

The utility model discloses a self-diagnosis protection device is based on single, the changeable and uncontrolled reality situation of three-phase dry-type transformer load environment, can self-diagnosis transformer self whether operating temperature is too high or the load is too big to carry out input side or output side disconnection power supply with self-protection and rear end power consumption protection as the purpose.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.

Claims (6)

1. The utility model provides a dry-type transformer load self-diagnosis protection device, includes the transformer main part, be equipped with the iron core in the transformer main part and coil in winding on the iron core, its characterized in that, self-diagnosis protection device still includes:

the reset type normally closed temperature switch (2) is arranged on the transformer main body, a temperature sensor is arranged on the reset type normally closed temperature switch, and the normally closed temperature switch (2) is connected with the winding in series;

and the external alternating current contactor is connected in series with the input control or output control end of the winding and is electrically connected with the normally closed temperature switch (2), the normally open/normally closed conversion of the normally closed temperature switch (2) is used as a signal given medium of the alternating current contactor, the temperature of the winding is further monitored in real time, and a detection circuit detects the abnormity of the signal and directly controls the on-off of the alternating current contactor.

2. A dry-type transformer load self-diagnosis protection device as claimed in claim 1, wherein when the transformer body is a single-phase transformer and the rated current is less than 20A, the mounting structure of the protection device is:

the iron core is provided with a single-phase primary winding, a single-phase secondary winding and an insulating layer, the normally closed temperature switch (2) is fixed when the inter-turn insulating layer is wound, the normally closed temperature switch (2) is connected with the single-phase primary winding in series, the suspended end of the normally closed temperature switch is used as the input end of the single-phase transformer, and the iron core is grounded.

3. A dry-type transformer load self-diagnosis protection device as claimed in claim 1, wherein when the transformer body is a single-phase autotransformer and the rated current is less than 20A, the mounting structure of the protection device is:

the normally closed temperature switch (2) is fixed on the single-phase secondary winding and fixed through the insulating layer, the normally closed temperature switch (2) is connected with the single-phase secondary winding in series, and the iron core is grounded.

4. A dry-type transformer load self-diagnosis protection device as claimed in claim 1, wherein when the transformer body is a three-phase transformer and the rated current is greater than 20A, the mounting structure of the protection device is:

be equipped with three-phase primary winding, three-phase secondary winding and insulating layer on the iron core, the insulating layer internal fixation normally closed temperature switch (2), normally closed temperature switch (2) are equipped with three groups and correspond fix three winding portion, three groups of three-phase secondary winding normally closed temperature switch (2) establish ties, and two lead-out wires after its series connection are connected to alternating current contactor's coil signal control point.

5. A dry-type transformer load self-diagnosis protection device as claimed in claim 4, wherein the three-phase transformer is provided with a heat dissipation channel.

6. A dry-type transformer load self-diagnosis protection device according to claim 1, wherein when the transformer body is a three-phase self-coupling transformer and the rated current is greater than 20A, the mounting structure of the protection device is as follows:

be equipped with three-phase primary winding, three-phase secondary winding and insulating layer on the iron core, the insulating layer internal fixation normally closed temperature switch (2), normally closed temperature switch (2) are equipped with three groups and correspond fix three winding portion, three groups of three-phase secondary winding normally closed temperature switch (2) establish ties, and two lead-out wires after its series connection are connected to alternating current contactor's coil signal control point.

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