CN202423852U - Main transformer protection current loop capable of side band running - Google Patents
Main transformer protection current loop capable of side band running Download PDFInfo
- Publication number
- CN202423852U CN202423852U CN 201120512158 CN201120512158U CN202423852U CN 202423852 U CN202423852 U CN 202423852U CN 201120512158 CN201120512158 CN 201120512158 CN 201120512158 U CN201120512158 U CN 201120512158U CN 202423852 U CN202423852 U CN 202423852U
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- main transformer
- current
- transformer protection
- running
- switch
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- Expired - Fee Related
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Abstract
The utility model discloses a main transformer protection current loop capable of side band running. According to the utility model, the switch CT (current transformer) current and the main transformer sleeve pipe CT current are respectively guided into a main transformer protection device individually; during the running process, the main transformer protection monitors the two groups of current loops simultaneously, and when any group of current loop is subjected to CT open circuit, alarm information is generated. By utilizing an auxiliary node of an operating handle, an opening is sent into a main transformer protection CPU (central processing unit) so as to distinguish the running state of the main transformer; when in normal running, the main transformer protection takes the switch CT current; when in side band running, the main transformer protection takes the main transformer sleeve pipe CT current. A current loop is not required to be operated for the running personnel, the operation is simple and convenient, the exit time of the main transformer protection is very short, and the system running reliability and operation safety are improved greatly; the operation is simple and convenient, the system running reliability is improved greatly; and no matter under the normal running state or the side band running state, the switch CT current and main transformer pipe sleeve CT current are monitored reliably, and if the CT open circuit exists, the running personnel can treat timely.
Description
Technical field
The utility model belongs to the main transformer protection technical field, but is specifically related to a kind of sideband operation main transformer protection current circuit.
Background technology
In the electric power system, the operational mode of main transformer by other female string band often appears.This moment, the operations staff need switch to main transformer cannula C T to the used current circuit of the protective device in the main transformer protection cabinet from switch CT; Do like this and have following drawback: operating process is complicated; And current switching is easy to wear in flakes, possibly cause the CT open circuit, jeopardizes operations staff's life security; Because complex operation step, operations staff's operating time is long, and corresponding prolongation of the time that main transformer protection withdraws from influences system's operational reliability; Current switching in flakes number of operations too much after, the situation of loose contact appears easily, both jeopardized operations staff's life and device security, also cause the device fluctuation of service easily; Under the normal operation, the protective current loop has no supervision to main transformer cannula C T electric current, under the sideband ruuning situation; Switch CT electric current also had no supervision; Even there is the situation of CT open circuit, the operations staff also has no way of learning, has very big blindness and danger during operation.
The utility model content
The purpose of the utility model is to avoid above-mentioned weak point of the prior art, but and provides a kind of operations staff to need not that greatly improve in operating current loop, processing safety, easy and simple to handle, sideband operation main transformer protection current circuit that system's operational reliability greatly improves.
The technical scheme that purpose adopted that realizes the utility model is: but a kind of sideband operation main transformer protection current circuit; The said mode of connection is following: switch CT is connected with the main transformer protection device separately respectively with main transformer cannula C T current circuit; In said main transformer protection loop, increase an operating handle; Under normal operation and two kinds of situation of sideband operation; Said operating handle is beaten in different positions, and said operating handle is provided with chromaffin body point, said node give main transformer protection CPU send into one open into.
Because the utility model is introduced the main transformer protection device to switch CT electric current, main transformer cannula C T electric current respectively separately.In the running, main transformer protection is kept watch on this two groups of current circuits simultaneously, when open circuit takes place arbitrary group of CT, all sends warning message.Utilize the chromaffin body point of an operating handle, give main transformer protection CPU send into one open into, distinguish the running status of main transformer.During normal the operation, main transformer protection is taken switch CT electric current; During the sideband operation, main transformer protection is taken main transformer cannula C T electric current.The operations staff need not the operating current loop, and is easy and simple to handle, easy master, and processing safety greatly improves; The time that main transformer protection withdraws from is very short, and system's operational reliability strengthens; No matter normally under operation or the sideband ruuning situation, switch CT electric current and main transformer cannula C T electric current are all had reliable supervision, if there is the situation of CT open circuit, the operations staff can in time handle.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described:
Fig. 1 is the circuit diagram of the utility model.
Embodiment
But the sideband of the utility model operation main transformer protection current circuit, on a large amount of experimental basis, constantly summing up experience, science is implemented, scientific design, the strict analysis, thus this method of drawing further specifies this method through specific embodiment below.
As shown in Figure 1; But a kind of sideband operation main transformer protection current circuit; Increase an operating handle in the main transformer protection loop, under normal operation and two kinds of situation of sideband operation, said operating handle is beaten in different positions; Said operating handle is provided with chromaffin body point, said node give main transformer protection CPU send into one open into.Said method mainly comprises the following mode of connection: introduce the main transformer protection device to switch CT electric current, main transformer cannula C T electric current respectively separately.
The utility model is introduced the main transformer protection device to switch CT electric current, main transformer cannula C T electric current respectively separately.In the running, main transformer protection is kept watch on this two groups of current circuits simultaneously, during arbitrary group of generation CT open circuit; All send warning message, increase an operating handle, under normal operation and two kinds of situation of sideband operation; This operating handle is beaten in different positions, utilizes the chromaffin body point of this operating handle, give main transformer protection CPU send into one open into; Utilize this open into, distinguish the running status of main transformer.During normal the operation, main transformer protection is taken switch CT electric current; During the sideband operation, main transformer protection is taken main transformer cannula C T electric current.The operations staff need not the operating current loop, and is easy and simple to handle, easy master, and processing safety greatly improves; The time that main transformer protection withdraws from is very short, and system's operational reliability strengthens; No matter normally under operation or the sideband ruuning situation, switch CT electric current and main transformer cannula C T electric current are all had reliable supervision, if there is the situation of CT open circuit, the operations staff can in time handle.
Claims (1)
1. but a sideband moves the main transformer protection current circuit; It is characterized in that: the said mode of connection is following: switch CT is connected with the main transformer protection device separately respectively with main transformer cannula C T current circuit; In said main transformer protection loop, increase an operating handle, under normal operation and two kinds of situation of sideband operation, said operating handle is beaten in different positions; Said operating handle is provided with chromaffin body point, said node give main transformer protection CPU send into one open into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120512158 CN202423852U (en) | 2011-12-11 | 2011-12-11 | Main transformer protection current loop capable of side band running |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120512158 CN202423852U (en) | 2011-12-11 | 2011-12-11 | Main transformer protection current loop capable of side band running |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202423852U true CN202423852U (en) | 2012-09-05 |
Family
ID=46748578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120512158 Expired - Fee Related CN202423852U (en) | 2011-12-11 | 2011-12-11 | Main transformer protection current loop capable of side band running |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202423852U (en) |
-
2011
- 2011-12-11 CN CN 201120512158 patent/CN202423852U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20141211 |
|
| EXPY | Termination of patent right or utility model |