CN218335419U - PT voltage secondary electric switching circuit - Google Patents
PT voltage secondary electric switching circuit Download PDFInfo
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- CN218335419U CN218335419U CN202222461392.4U CN202222461392U CN218335419U CN 218335419 U CN218335419 U CN 218335419U CN 202222461392 U CN202222461392 U CN 202222461392U CN 218335419 U CN218335419 U CN 218335419U
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- generating line
- voltage
- switch
- circuit breaker
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Abstract
The utility model particularly relates to a PT voltage secondary electrical switching circuit, including change over switch SA and contactor KM2, change over switch SA has connected gradually segmentation circuit breaker cabinet, segmentation isolation cabinet and first generating line PT cabinet, and first generating line PT cabinet is parallelly connected to have second generating line PT cabinet, and public end between first generating line PT cabinet and the second generating line PT cabinet is connected with auxiliary relay KM1, and change over switch SA's one end is connected in contactor KM 2's positive pole, and auxiliary relay KM 1's one end is connected in contactor KM 2's negative pole. The utility model has the advantages that: this structure is connected with auxiliary relay KM1 through the common end between first generating line PT cabinet and the second generating line PT cabinet, plays and simplifies first generating line PT cabinet and second generating line PT cabinet connected relation, plays with low costs, the simple and safe and reliable's of wiring advantage.
Description
Technical Field
The utility model relates to a distribution equipment technical field, more specifically say, relate to a PT voltage secondary electrical switching circuit.
Background
PT means: the Voltage Transformer is used for transforming Voltage, and is similar to a Transformer.
However, the purpose of transforming voltage by the transformer is to conveniently transmit electric energy, so that the capacity is very large, and usually kilovolt-ampere or mega volt-ampere is taken as a calculation unit; the voltage transformer is mainly used for supplying power to a measuring instrument and a relay protection device, measuring the voltage, power and electric energy of a line or protecting valuable equipment, a motor and a transformer in the line when the line fails, so that the capacity of the voltage transformer is small, generally only a few volt-amperes and dozens of volt-amperes, and the maximum voltage of the voltage transformer does not exceed one thousand volt-amperes.
For example, the national intellectual property office discloses a patent application with the following number: CN201220667510.0, the utility model discloses a main change protection PT voltage secondary switches return circuit, switch handle, 4G owner including PT secondary voltage and advance the other female switch auxiliary contact of switch, 4G owner advances the other female switch auxiliary contact of switch and is connected with PT secondary voltage switch handle, PT secondary voltage switches the handle and includes two sets of contacts, relay 1YQJ point and 2YQJ point are connected respectively to two sets of contacts. The utility model discloses can in time accurately switch the voltage of actual operation generating line to PT secondary voltage return circuit and effectively prevent to switch because the mistake that the maloperation arouses, make things convenient for the operation personnel to operate, improve electrical equipment operational reliability.
The parallel circuit voltage is realized by a microcomputer protection device, but the parallel circuit voltage is realized by a microcomputer protection device
The price is high, the wiring is complicated, and the contact capacity for realizing switching inside the microcomputer protection is low.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a PT voltage secondary electrical switching circuit which is low in cost, simple in wiring, and safe and reliable.
According to the utility model discloses a PT voltage secondary electrical switching circuit, including change over switch SA and contactor KM2, change over switch SA has connected gradually the segmentation circuit breaker cabinet, segmentation isolation cabinet and first generating line PT cabinet, and first generating line PT cabinet has second generating line PT cabinet in parallel, and public end between first generating line PT cabinet and the second generating line PT cabinet is connected with auxiliary relay KM1, and change over switch SA's one end is connected in contactor KM 2's positive pole, and auxiliary relay KM 1's one end is connected in contactor KM 2's one end
The negative electrode of (1).
Specifically, a circuit breaker QF and a first switch S1 are arranged in the sectional circuit breaker cabinet, and the circuit breaker QF is connected with the first switch S1.
Specifically, a double-power converter DPC and a second switch S2 are arranged in the sectional isolation cabinet, and the double-power converter DPC is connected with the second switch S2.
Specifically further, the circuit breaker QF is a vacuum circuit breaker.
And particularly, a voltage transformer PT, an isolation knife, a fuse and a lightning arrester are arranged inside the first bus PT cabinet and the second bus PT cabinet.
The beneficial effects of the utility model are that: this structure is connected with auxiliary relay KM1 through the common end between first generating line PT cabinet and the second generating line PT cabinet, plays and simplifies first generating line PT cabinet and second generating line PT cabinet connected relation, plays with low costs, the simple and safe and reliable's of wiring advantage.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of the present invention.
As the reference numbers are as follows:
the device comprises a sectional breaker cabinet 1, a sectional isolation cabinet 2, a first bus PT cabinet 3 and a second bus PT cabinet 4.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
The following describes with reference to fig. 1 a PT voltage secondary electrical switching circuit according to an embodiment of the present invention, including change over switch SA and contactor KM2, change over switch SA has connected gradually segmentation circuit breaker cabinet 1, segmentation isolation cabinet 2 and first generating line PT cabinet 3, first generating line PT cabinet 3 has second generating line PT cabinet 4 in parallel, the common port between first generating line PT cabinet 3 and second generating line PT cabinet 4 is connected with auxiliary relay KM1, the positive pole of contactor KM2 is connected to one end of change over switch SA, the negative pole of contactor KM2 is connected to one end of auxiliary relay KM 1.
In the embodiment, the intermediate relay KM1 is connected to the public end between the first bus PT cabinet 3 and the second bus PT cabinet 4, so that the connection relationship between the first bus PT cabinet and the second bus PT cabinet is simplified, and the advantages of low cost, simple wiring, safety and reliability are achieved.
The intermediate relay KM1 is essentially a voltage relay, but its number of contacts
More and smaller capacity, it is the electrical apparatus used as control switch.
The main contact of the intermediate relay can pass large current; the intermediate relay has a large number of contact sets and no main and auxiliary components, and the magnitude of the current allowed to pass through each set of contacts is the same, and the rated current is about 5A.
The first busbar PT cabinet 3 and the second busbar PT cabinet 4 are respectively called: the voltage transformer cabinet is generally directly arranged on a bus to detect the voltage of the bus and realize the protection function. And a voltage transformer PT, an isolation knife, a fuse, a lightning arrester and the like are arranged inside the first bus PT cabinet 3 and the second bus PT cabinet 4. The voltage transformer PT, the isolation knife, the fuse and the lightning arrester are connected in sequence. The potential transformer PT is a high voltage potential transformer. The high-voltage transformer is suitable for converting large voltage into small voltage or converting large current into small current in a 1kv to 220kv power system for measurement, protection and use.
The arrester is a high voltage arrester. The high-voltage lightning arrester can guide the impact current quantity into the soil layer, and when the working voltage is removed, the high-voltage lightning arrester can quickly recover to be normal. Therefore, the high-voltage arrester has the effects of reducing the amplitude of the invading current, reducing the working voltage value of the maintained machine equipment, maintaining the series machine equipment and being used for safety protection and actual operation of high working voltage.
The fuse is a high voltage fuse. When the circuit or the equipment in the circuit is overloaded or has a fault, the current of the circuit exceeds a specified value and is fused after a certain time, the fuse element of the high-voltage fuse generates heat, so that the circuit is cut off, the current is cut off, and the purpose of protecting the circuit or the equipment is achieved.
The change-over switch SA is a low-voltage switch for switching a plurality of circuits. A plurality of moving contacts are welded on the shaft in an overlapping mode, and the moving contacts are sequentially connected with or disconnected from the static contacts when the shaft rotates.
Specifically, a circuit breaker QF and a first switch S1 are arranged in the sectional circuit breaker cabinet 1, and the circuit breaker QF is connected with the first switch S1. Particularly, a double-power converter DPC is arranged in the sectional isolation cabinet 2
And a second switch S2, a double power converter DPC and the second switch S2.
The breaker QF can close, bear and break the current under the condition of a normal loop; mechanical switching devices that carry a prescribed overcurrent for a prescribed time and are capable of switching current in abnormal circuit conditions (e.g., various short circuit conditions) on and off. The circuit breaker QF is a vacuum circuit breaker.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
- PT voltage secondary electrical switching circuit, including change over switch SA and contactor KM2, its characterized in that: change over switch SA has connected gradually segmentation circuit breaker cabinet (1), segmentation isolation cabinet (2) and first generating line PT cabinet (3), first generating line PT cabinet (3) parallel connection has second generating line PT cabinet (4), the common terminal between first generating line PT cabinet (3) and second generating line PT cabinet (4) is connected with auxiliary relay KM1, change over switch SA's one end is connected in contactor KM 2's positive pole, auxiliary relay KM 1's one end is connected in contactor KM 2's negative pole.
- 2. The PT voltage secondary electrical switching circuit of claim 1, wherein: the circuit breaker is characterized in that a circuit breaker QF and a first switch S1 are arranged in the sectional circuit breaker cabinet (1), and the circuit breaker QF is connected with the first switch S1.
- 3. The PT voltage secondary electrical switching circuit of claim 2 wherein: the sectional isolation cabinet (2) is internally provided with a double-power converter DPC and a second switch S2, and the double-power converter DPC is connected with the second switch S2.
- 4. The PT voltage secondary electrical switching circuit of claim 2, wherein: the circuit breaker QF is a vacuum circuit breaker.
- 5. The PT voltage secondary electrical switching circuit of claim 1, wherein: and a voltage transformer PT, an isolation knife, a fuse and a lightning arrester are arranged inside the first bus PT cabinet (3) and the second bus PT cabinet (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222461392.4U CN218335419U (en) | 2022-09-17 | 2022-09-17 | PT voltage secondary electric switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222461392.4U CN218335419U (en) | 2022-09-17 | 2022-09-17 | PT voltage secondary electric switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218335419U true CN218335419U (en) | 2023-01-17 |
Family
ID=84836596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222461392.4U Active CN218335419U (en) | 2022-09-17 | 2022-09-17 | PT voltage secondary electric switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218335419U (en) |
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2022
- 2022-09-17 CN CN202222461392.4U patent/CN218335419U/en active Active
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