CN201328002Y - Overvoltage protection system for disconnecting switch used in locomotive depot - Google Patents
Overvoltage protection system for disconnecting switch used in locomotive depot Download PDFInfo
- Publication number
- CN201328002Y CN201328002Y CNU2008202237399U CN200820223739U CN201328002Y CN 201328002 Y CN201328002 Y CN 201328002Y CN U2008202237399 U CNU2008202237399 U CN U2008202237399U CN 200820223739 U CN200820223739 U CN 200820223739U CN 201328002 Y CN201328002 Y CN 201328002Y
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- China
- Prior art keywords
- isolating transformer
- isolation
- overvoltage protection
- transformer
- protection system
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Abstract
The utility model discloses an overvoltage protection system for the disconnecting switch used in locomotive depot, which is characterized by essentially consisting of an isolation transformer I and more than one isolation transformers II. The input ends of the isolation transformers II are connected with the output end of the isolation transformer I; the output end of each isolation transformer II is connected with a protection module; the input end of the isolation transformer I is connected with a power supply after passing through a protection module. The overvoltage protection system has simple integrated structure and is convenient for increasing or decreasing the quantity of outdoor isolation transformers anytime. Moreover, as the overvoltage protection system has two preventive measures, the whole isolation switch control system can be prevented from being in a state of paralysis even when the fault that voltage is merged into a contact grid happens, the equipment in the isolation switch control system can run normally.
Description
Technical field
The utility model relates to a kind of voltage protection system, specifically is meant a kind of locomotive depot isolation switch overvoltage protection system that is used for.
Background technology
In present railway operation, after moving Hui Ku every day, electric locomotive (motor train unit) all must in section, reorganize and outfit operation, promptly again with after electric locomotive and the electrical network disconnection, the upkeep operation personnel carry out various maintenance and maintenance at the electric locomotive roof to this electric locomotive.For the voltage that prevents contact line seals in the device security that injures the person and protection isolating switch system, therefore on isolating switch, all must take the power supply overvoltage protection measure.
But present isolating switch power overvoltage protection all is the one-level protection mode that adopts, its structure as shown in Figure 1, promptly the electric equipment in the isolation switch control system all directly and indoor single-phase isolating transformer be connected.When adopting this kind protection mode, in case there is the voltage of contact line to seal in, this voltage just directly is carried on this electric equipment so, thereby can cause the damage of these electric equipments, and then causes the paralysis of the isolating switch system of whole locomotive depot.Therefore, present these isolating switch overvoltage protection pattern utmost points are unfavorable for the overvoltage protection of isolating switch.
The utility model content
The purpose of this utility model is to overcome the shortcoming and defect of above-mentioned prior art; a kind of locomotive depot isolation switch overvoltage protection system is provided; this system is not only simple in structure, stable performance, even coming in contact the paralysis that also can effectively prevent whole system when net voltage seals in fault.
The purpose of this utility model is achieved through the following technical solutions: a kind of overvoltage protection system of locomotive depot isolation switch mainly comprises isolating transformer I and more than one isolating transformer II; the input of described isolating transformer II all is connected with the output of isolating transformer I; the output of every isolating transformer II also is connected with a protection module, and the input of described isolating transformer I also is connected with power supply by a protection module.
Further, single-phase isolating transformer of dry type or dry type three-phase isolation transformer that described isolating transformer I is an indoor type, isolating transformer II are single-phase isolating transformer of the dry type of outdoor version or dry type three-phase isolation transformer.
The utility model is compared with prior art, has the following advantages:
(1) the outdoor version isolating transformer in the utility model is connected with indoor isolating transformer by service cable in locomotive depot's section, and not only overall structure is simple, and easily at any time increase or reduce the quantity of outdoor version isolating transformer.
(2) have the two-stage safeguard procedures owing to this is novel, not only has lightning protection function, but also has the high-tension function of the 28KV of isolation, even come in contact the fault that net voltage seals in, can guarantee that also the whole isolated on-off control system is not in paralyzed state, thereby guarantee the normal operation of equipment in the isolation switch control system.
Description of drawings
Fig. 1 is the structural representation of existing overvoltage protective system;
Fig. 2 is an overall structure schematic diagram of the present utility model;
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the utility model do, but execution mode of the present utility model is not limited thereto.
As shown in Figure 1, existing locomotive depot isolation switch overvoltage protection system only is made up of the single-phase isolating transformer I of indoor type, and its input links to each other with AC power, and output equipment then direct and in the isolation switch control system links to each other.When adopting this pattern, if come in contact net voltage when sealing in fault, because the single-phase isolating transformer I of this indoor type directly links to each other with equipment, so this electric equipment of meeting severe impairment, even can make the whole isolated on-off control system in paralyzed state.
Fig. 2 shows structural representation of the present utility model, compares with existing locomotive depot isolation switch overvoltage protection system, and the utility model has also increased the isolating transformer II of some outdoor version newly.The input of these isolating transformers II all is connected by the output of service cable in locomotive depot's section with the isolating transformer I of indoor type, in order to reach anti-lightning strike, suppress surge, prevent the purpose that transient over-voltage impacts, the input of described isolating transformer I also links to each other with the power supply of electrical network by a protection module; Simultaneously, the output of each isolating transformer II also divides other to be connected with a protection module.All isolating transformer II are connected by all direct and in the isolation switch control system the later on concrete electric equipment of this protection module, as electrical relaybox, operating desk or the like.For each electric equipment of protection that can be best, described each isolating transformer II all only connects an electric equipment.Therefore, the quantity of the isolating transformer II of all outdoor versions in the utility model and the quantity of the electric equipment that is connected equates, the quantity of all protection modules then equates with the summation of the quantity of all isolating transformer II with isolating transformer I.
Because the motor that motor drive mechanism adopted in the isolation switch control system can be monophase machine or three phase electric machine, therefore, according to the motor that reality adopted, this isolating transformer can adopt single-phase isolating transformer or three-phase isolation transformer.In order to improve isolation voltage of the present utility model, all isolating transformers all adopt the dry type isolating transformer simultaneously.It is DC-3.0/0.22 that indoor type isolating transformer I described in the utility model preferentially adopts model, capacity is the single-phase isolating transformer of the dry type of 3.0KVA, it is DC-0.75/0.22 that outdoor version isolating transformer II preferentially adopts model, capacity is the single-phase isolating transformer of the dry type of 0.75KVA, by isolating transformer I and this two-stage voltage isolation of isolating transformer II, maximum isolation voltage of the present utility model can reach 28KV.Simultaneously, because all isolating transformer II of the present utility model all adopt cable to be connected with isolating transformer I, therefore can increase or reduce the quantity of isolating transformer II very easily at any time.According to the power of the isolating transformer I of each indoor type, each isolating transformer I can connect 1 to 7 outdoor version isolating transformer II.If think the quantity that increase isolating transformer II, the power that then only needs to increase this isolating transformer I gets final product more.
As mentioned above, just can realize the utility model preferably.
Claims (3)
1, a kind of overvoltage protection system of locomotive depot isolation switch; it is characterized in that; mainly comprise isolating transformer I and more than one isolating transformer II; the input of described isolating transformer II all is connected with the output of isolating transformer I; the output of every isolating transformer II also is connected with a protection module, and the input of described isolating transformer I also is connected with power supply by a protection module.
2, the overvoltage protection system of a kind of locomotive depot isolation switch according to claim 1 is characterized in that, single-phase isolating transformer of dry type or dry type three-phase isolation transformer that described isolating transformer I is an indoor type.
3, the overvoltage protection system of a kind of locomotive depot isolation switch according to claim 1 is characterized in that, single-phase isolating transformer of dry type or dry type three-phase isolation transformer that described isolating transformer II is an outdoor version.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202237399U CN201328002Y (en) | 2008-12-25 | 2008-12-25 | Overvoltage protection system for disconnecting switch used in locomotive depot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202237399U CN201328002Y (en) | 2008-12-25 | 2008-12-25 | Overvoltage protection system for disconnecting switch used in locomotive depot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201328002Y true CN201328002Y (en) | 2009-10-14 |
Family
ID=41179962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202237399U Expired - Lifetime CN201328002Y (en) | 2008-12-25 | 2008-12-25 | Overvoltage protection system for disconnecting switch used in locomotive depot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201328002Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106364423A (en) * | 2016-10-20 | 2017-02-01 | 广西大学 | Locomotive electric heating glass protective earthing device |
-
2008
- 2008-12-25 CN CNU2008202237399U patent/CN201328002Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106364423A (en) * | 2016-10-20 | 2017-02-01 | 广西大学 | Locomotive electric heating glass protective earthing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHENGDU YUNDA RAIL EQUIPMENT CO., LTD. Free format text: FORMER OWNER: YUNDA CREATIVE TECH CO., LTD, CHENGDU Effective date: 20110419 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20110419 Address after: High tech Zone Chengdu city Sichuan province 610000 Gaopeng Road No. 2 Conte incubator base Patentee after: Chengdu Yunda Rail Equipment Co., Ltd. Address before: High tech Zone Chengdu city Sichuan province 610000 Gaopeng Road No. 2 Conte incubator base Patentee before: Yunda Creative Tech Co., Ltd, Chengdu |
|
| C56 | Change in the name or address of the patentee |
Owner name: CHENGDU YUNDA TECHNOLOGY CO., LTD. Free format text: FORMER NAME: CHENGDU YUNDA RAIL TRANSIT EQUIPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: High tech Zone Chengdu city Sichuan province 610000 Gaopeng Road No. 2 Conte incubator base Patentee after: Chengdu Yuanda Technology Co., Ltd. Address before: High tech Zone Chengdu city Sichuan province 610000 Gaopeng Road No. 2 Conte incubator base Patentee before: Chengdu Yunda Rail Equipment Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20091014 |
|
| CX01 | Expiry of patent term |