CN204156316U - The secondary circuit device of pressure drop can be reduced - Google Patents
The secondary circuit device of pressure drop can be reduced Download PDFInfo
- Publication number
- CN204156316U CN204156316U CN201420585966.1U CN201420585966U CN204156316U CN 204156316 U CN204156316 U CN 204156316U CN 201420585966 U CN201420585966 U CN 201420585966U CN 204156316 U CN204156316 U CN 204156316U
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- China
- Prior art keywords
- contact
- pressure drop
- voltage
- auxiliary relay
- voltage transformer
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- 238000004804 winding Methods 0.000 claims abstract description 23
- 229910001316 Ag alloy Inorganic materials 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000003628 erosive effect Effects 0.000 abstract description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 230000005284 excitation Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model discloses a kind of secondary circuit device reducing pressure drop, comprise secondary windings of PT, air switch, voltage transformer knife switch secondary contact, voltage parallel device and auxiliary relay, compared with prior art, the utility model utilizes and substitutes conventional voltage transformer knife switch secondary contact with silver alloy contact, low-resistance, auxiliary relay contact that environmental suitability is strong; And be installed on outdoor sports ground terminal box, avoid it to be subject to burning sun rain erosion, optimize its running environment; Make the contact resistance of auxiliary relay contact remain on lower value for a long time safely and reliably, thus make whole secondary voltage circuit pressure drop remain on smaller value for a long time.
Description
Technical field
The utility model relates to a kind of transformer station internal circuit, particularly relates to a kind of secondary circuit device reducing pressure drop.
Background technology
In the conventional substation run at present, as shown in Figure 1, the voltage switching device shifter 4 arranged side by side that it is often opened in auxiliary contact 3, main control room by the alternating current air switch 2 be located in the voltage transformer 1 in outdoor electricity distribution place, switch terminal case, outdoor voltage transformer disconnecting link connects and composes through cable the composition structure of alternating voltage secondary circuit device.Operation principle is: voltage transformer 1 secondary voltage by cable leading to the alternating current air switch 2 in terminal box; alternating voltage after sky is opened often is opened auxiliary contact 3 by cable leading to voltage transformer disconnecting link and is back to terminal box; deliver to main control room voltage switching device shifter 4 arranged side by side by cable again, thus supply each spacer units protection use.
The deficiency that this kind of loop apparatus in use exists is: (1) loop pressure drop is comparatively large, causes kwh loss; (2) disconnection fault rate is higher, not only makes maintenance load comparatively large, and affects electric power conveying.Cause the main cause of above-mentioned weak point to be: because voltage transformer knife switch secondary contact is chronically exposed to outdoor switch place, rainwater corrosion is serious, and long-play must cause that auxiliary contact place contact resistance increases, pressure drop increases; Also easily cause loose contact, cause ac voltage circuit to break.
Summary of the invention
The purpose of this utility model is just to provide a kind of secondary circuit device reducing pressure drop to solve the problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises secondary windings of PT, air switch, voltage transformer knife switch secondary contact, voltage parallel device and auxiliary relay, winding two ends of described secondary windings of PT are connected with two ports of described voltage transformer knife switch secondary contact, each port of another winding of described secondary windings of PT is connected with each port of described air switch, each port of described air switch is connected with the port of described voltage transformer, described voltage parallel device is arranged at the stage casing of cable, described auxiliary relay is connected between voltage transformer knife switch secondary contact and voltage parallel device.
Particularly, described secondary windings of PT, described air switch and described voltage transformer knife switch secondary contact form one group of pressure drop device, and described pressure drop device is two groups, and pressure drop device described in two groups is connected to the both sides of described voltage parallel device.Described secondary windings of PT is installed on open air, and described air switch and described auxiliary relay are installed in casing.
The beneficial effects of the utility model are:
The utility model is a kind of secondary circuit device reducing pressure drop, and compared with prior art, the utility model utilizes and substitutes conventional voltage transformer knife switch secondary contact with silver alloy contact, low-resistance, auxiliary relay contact that environmental suitability is strong; And be installed on outdoor sports ground terminal box, avoid it to be subject to burning sun rain erosion, optimize its running environment; Make the contact resistance of auxiliary relay contact remain on lower value for a long time safely and reliably, thus make whole secondary voltage circuit pressure drop remain on smaller value for a long time.
Accompanying drawing explanation
Fig. 1 is conventional substation voltage secondary circuit schematic diagram;
Fig. 2 is circuit structure schematic diagram of the present utility model;
Fig. 3 is the utility model auxiliary relay excitation secondary circuit schematic diagram;
Fig. 4 is the utility model auxiliary relay secondary connection diagram.
In figure: 1: secondary windings of PT, 2: air switch, 3: voltage transformer knife switch secondary contact, 4: voltage parallel device, 5: auxiliary relay.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1: the utility model comprises secondary windings of PT 1, air switch 2, voltage transformer knife switch secondary contact 3, voltage parallel device 4 and auxiliary relay 5, winding two ends of secondary windings of PT 1 are connected with two ports of voltage transformer knife switch secondary contact 3, each port of another winding of secondary windings of PT 1 is connected with each port of air switch 2, each port of air switch 2 is connected with the port of voltage transformer 3, voltage parallel device 4 is arranged at the stage casing of cable, auxiliary relay 5 is connected between voltage transformer knife switch secondary contact 3 and voltage parallel device 4, secondary windings of PT 1, air switch 2 and voltage transformer knife switch secondary contact 3 form one group of pressure drop device, pressure drop device is two groups, two groups of pressure drop device are connected to the both sides of voltage parallel device 4.Described secondary windings of PT is installed on open air, and described air switch and described auxiliary relay are installed in casing.
Use with silver alloy contact, low-resistance, auxiliary relay that environmental suitability is strong, seal in the secondary voltage circuit of voltage transformer, secondary voltage is introduced master-control room voltage parallel device by the normally opened contact of this auxiliary relay, thus achieve and use high-quality silver tipped contact to substituted for traditional outdoor voltage transformer knife switch secondary contact, realize the object reducing pressure drop.
Implementation procedure is as follows: as shown in Figure 4, and this new device applies to the auxiliary relay with silver tipped contact, and it is made up of magnet exciting coil and normally opened contact thereof.As shown in Figure 3, the magnet exciting coil of auxiliary relay 5 and outdoor voltage transformer disconnecting link are often opened auxiliary contact 3 and is connected through cable, and by master-control room voltage secondary circuit parallel device power supply, it is powered.When primary voltage instrument transformer disconnecting link dynamic circuit connector, knife switch secondary contact 3 closes, and makes the magnet exciting coil excitation of silver tipped contact auxiliary relay 5, and its normally opened contact action closes.As shown in Figure 2; the normally opened contact of utilization silver tipped contact auxiliary relay 5 substitutes the conventional voltage transformer knife switch secondary contact 3 in accompanying drawing 1; seal in the secondary voltage circuit of voltage transformer 1, secondary voltage is introduced master-control room voltage parallel device 4 and supply the protection of each spacer units using.
More than show and describe general principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. one kind can be reduced the secondary circuit device of pressure drop, it is characterized in that: comprise secondary windings of PT, air switch, voltage transformer knife switch secondary contact, voltage parallel device and auxiliary relay, winding two ends of described secondary windings of PT are connected with two ports of described voltage transformer knife switch secondary contact, each port of another winding of described secondary windings of PT is connected with each port of described air switch, each port of described air switch is connected with the port of described voltage transformer, described voltage parallel device is arranged at the stage casing of cable, described auxiliary relay is connected between voltage transformer knife switch secondary contact and voltage parallel device.
2. the secondary circuit device reducing pressure drop according to claim 1, it is characterized in that: described secondary windings of PT, described air switch and described voltage transformer knife switch secondary contact form one group of pressure drop device, described pressure drop device is two groups, and pressure drop device described in two groups is connected to the both sides of described voltage parallel device.
3. the secondary circuit device reducing pressure drop according to claim 1, is characterized in that: described secondary windings of PT is installed on open air, and described air switch and described auxiliary relay are installed in casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585966.1U CN204156316U (en) | 2014-10-11 | 2014-10-11 | The secondary circuit device of pressure drop can be reduced |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585966.1U CN204156316U (en) | 2014-10-11 | 2014-10-11 | The secondary circuit device of pressure drop can be reduced |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204156316U true CN204156316U (en) | 2015-02-11 |
Family
ID=52514405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420585966.1U Expired - Fee Related CN204156316U (en) | 2014-10-11 | 2014-10-11 | The secondary circuit device of pressure drop can be reduced |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204156316U (en) |
-
2014
- 2014-10-11 CN CN201420585966.1U patent/CN204156316U/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: 20150211 Termination date: 20181011 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |