CN204928089U - Electric locomotive is with protection device in high -pressure voltage transformer net side return circuit - Google Patents
Electric locomotive is with protection device in high -pressure voltage transformer net side return circuit Download PDFInfo
- Publication number
- CN204928089U CN204928089U CN201520570354.XU CN201520570354U CN204928089U CN 204928089 U CN204928089 U CN 204928089U CN 201520570354 U CN201520570354 U CN 201520570354U CN 204928089 U CN204928089 U CN 204928089U
- Authority
- CN
- China
- Prior art keywords
- voltage transformer
- copper conductor
- electric locomotive
- pressure
- transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to an electric locomotive's additional equipment provides an electric locomotive is with protection device in high -pressure voltage transformer net side return circuit. The electric locomotive that provides has a static screen (2) with the protection device in high -pressure voltage transformer's net side return circuit, and the one end setting of static screen (2) is at the winding head end of high -pressure voltage transformer (1) primary coil side, and the other end of static screen (2) is connected with copper conductor (4) that the cross -section is 1.5mm2, be connected with the copper conductor of cross -section for 1.5mm2 on conducting rod (5) of electric locomotive roof high pressure generating line, on the static screen copper conductor (4) and conducting rod on the copper conductor connect as an organic wholely through transition copper bar (3), the minimum length of transition copper bar (3) be 280mm. The utility model discloses reduce the biggest current potential and the biggest gradient in the oscillatory process between voltage transformer high -pressure coil head end turn to turn, layer, reduced the transient voltage to the insulating destruction of voltage transformer.
Description
Technical field
The utility model relates to the auxiliary device of electric locomotive, is specifically related to a kind of protective device of HV Voltage Transformer for Electric Locomotives net side loop.
Background technology
Shaoshan series electric locomotive adopts TBY1-25/100 type high voltage potential transformer, and electric locomotive obtains 25kV, 50HZ single phase industrial frequence alternating current from contact line, and 95mm is passed through in high voltage potential transformer (TV) primary winding side
2copper weaves soft line and is parallel on the high voltage bus of roof 25kV, is down to 100V through high voltage potential transformer no-load voltage ratio (25kV/100V), and by drivers' cab net pressure table (1PV, 2PV) display net pressure signal, realizes net pressure and monitor; In recent years, in succession there are a lot of high voltage potential transformer winding earth, winding interturn short-circuit and safety valve quality problems and cause locomotive network side loop ground connection in Shaoshan series electric locomotive, cause traction substation to trip and even blow contact line, serious threat transportation safety, the reason causing high voltage potential transformer to damage is as follows:
1, transient voltage causes high voltage potential transformer to damage:
High voltage potential transformer runs for a long time under changeable environment, is often subject to the intrusion of transient voltage; Transient voltage comprises the switching overvoltage of contact line circuit, atmospheric over-voltage and very fast transient voltage; Switching overvoltage be due on contact line circuit switch switching on operation time, because of in system electromagnetic energy vibration and gather generation overvoltage, be generally 3.0-4.5 times of rated voltage; Atmospheric over-voltage be transmission line be directly struck by lightning or thundercloud discharge time electromagnetic field play row change the overvoltage that causes, be generally 8.0-12.0 times of rated voltage; The transient voltage gradient is steep; duration is short; high-tension coil is entered easily via protective device; because transient voltage is far above the rated voltage of high voltage potential transformer; very harmful to high voltage potential transformer coil; actual count shows, transient voltage causes the ratio of voltage transformer insulation damages to account for more than 60%.
2, aqueous vapor causes high voltage potential transformer insulation to decline:
TBY1-25/100 type high voltage potential transformer high-tension coil divides A, B, C, D, E totally 5 sections, and total number of turns is 249871 circles, and the number of turn number of plies is all a lot, and winding inter-turn, interlayer adopt the isolation of insulation paint film; The number of turn number of plies more air gaps content is more, and these air gaps and insulation paint film all can adsorption moistures.High voltage potential transformer overhaul, assemble or occur casing leakage of oil time all can have moisture invade instrument transformer box body, when Moisture high UCL sudden drop in temperature, excessive moisture runs into mercury dropped at winding surface sweating, causes winding insulation to decline.Cause winding flashover arcing time serious, cause instrument transformer fuel tank internal gas pressure sharply to rise initiation transformer explosion.
3, high-pressure safety valve fault causes high voltage potential transformer insulation harm:
High-pressure safety valve is the protective device of high voltage potential transformer, when tank pressure is above standard opening pressure (35 ± 5kP), and high-voltage safety valve events, outside oil spout release pressure, blasts in order to avoid tank pressure is too high; When there is inner dust stratification, spring corrosion in high-pressure safety valve, the opening pressure step-down of high-pressure safety valve, when tank pressure is no more than normal pressure, safety valve will the outside oil spout of action; When the transformer oil in high voltage potential transformer reduces in a large number, the cooling of coil and state of insulation worsen, and electric current sharp increase scaling loss coil causes ground connection; After high voltage potential transformer ground connection, the temperature inside the box raises rapidly, and pressure increases exponentially, and causes high voltage potential transformer case lid to burst.
In sum, if high voltage potential transformer occurs that winding insulation damages or problem with grounding, the short circuit current of hundreds of peace can not fuse the 95mm be connected with high voltage potential transformer high tension voltage primary winding side
2copper weaves soft line (maximum by the nearly kilo-ampere of electric current); Finally powerful short circuit current causes oil temperature in high voltage potential transformer fuel tank sharply to raise, and causes transformer explosion, causes contact line accident.
Utility model content
For solving the problems of the technologies described above, the purpose of this utility model is the protective device proposing a kind of HV Voltage Transformer for Electric Locomotives net side loop.
The utility model adopts following technical scheme for completing above-mentioned purpose:
A kind of protective device of net side loop of HV Voltage Transformer for Electric Locomotives; described protective device has electrostatic shielding; one end of described electrostatic shielding is arranged on the winding head end of high voltage potential transformer primary winding side, and it is 1.5mm that the other end of described electrostatic shielding is connected with cross section
2copper conductor; The conducting rod of power locomotive top high voltage bus being connected with cross section is 1.5mm
2copper conductor; Copper conductor described on copper conductor described on electrostatic shielding and conducting rod is connected as one by transition copper bars; The minimum length of described transition copper bars is 280mm.
The protective device of the net side loop of a kind of use for electric locomotive voltage transformer that the utility model proposes, by arranging electrostatic shielding at the winding head end of high voltage potential transformer primary winding side
,reduce maximum potential in oscillatory process of voltage transformer high-tension coil head end turn-to-turn, interlayer and greatest gradient, decrease the destruction that transient voltage insulate to voltage transformer; The voltage of voltage transformer low-voltage coil side is detected, after normal locomotive rising bow, net is pressed within the scope of 17-31kV, if net pressure more than 40S higher than 32kV, should disconnect main circuit breaker in time, only force down main circuit breaker after 31kV is more than 20S at net and just allow again to close a floodgate; So just can be worth by monitoring net pressure, the state of insulation of anticipation high voltage potential transformer winding, prevents fault from worsening further; Copper conductor is adopted to replace 95mm
2copper weaves soft line, when winding earth or turn-to-turn, layer short circuit appear in voltage transformer, to fuse instantaneously the 1.5mm be connected with transformer high voltage side up to hundreds of ampere short circuit current
2copper conductor, makes the high voltage potential transformer of fault circuit that is timely and power locomotive top high voltage bus isolate, avoids bad accident to expand further.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1, high voltage potential transformer, 2, electrostatic shielding, 3, transition copper bars, 4, copper conductor, 5, conducting rod.
Embodiment
With specific embodiment, the utility model is illustrated by reference to the accompanying drawings:
As shown in Figure 1; a kind of protective device of HV Voltage Transformer for Electric Locomotives net side loop; described protective device has electrostatic shielding 2, and one end of described electrostatic shielding 2 is arranged on the winding head end of high voltage potential transformer 1 primary winding side, and it is 1.5mm that the other end of described electrostatic shielding 2 is connected with cross section
2copper conductor 4; The conducting rod 5 of power locomotive top high voltage bus being connected with cross section is 1.5mm
2copper conductor; Copper conductor described on copper conductor described on electrostatic shielding and conducting rod is connected as one by transition copper bars 3; The minimum length of described transition copper bars 3 is 280mm.Described electrostatic shielding 2 is surrounded by the copper plate that one piece of 0.5mm is thick, draws an earth connection.
Claims (1)
1. the protective device of a HV Voltage Transformer for Electric Locomotives net side loop; it is characterized in that: described protective device has electrostatic shielding (2); one end of described electrostatic shielding (2) is arranged on the winding head end of high voltage potential transformer (1) primary winding side, and it is 1.5mm that the other end of described electrostatic shielding (2) is connected with cross section
2copper conductor (4); It is 1.5mm that the conducting rod (5) of power locomotive top high voltage bus is connected with cross section
2copper conductor; Copper conductor described on copper conductor (4) described on electrostatic shielding and conducting rod is connected as one by transition copper bars (3); The minimum length of described transition copper bars (3) is 280mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520570354.XU CN204928089U (en) | 2015-08-03 | 2015-08-03 | Electric locomotive is with protection device in high -pressure voltage transformer net side return circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520570354.XU CN204928089U (en) | 2015-08-03 | 2015-08-03 | Electric locomotive is with protection device in high -pressure voltage transformer net side return circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204928089U true CN204928089U (en) | 2015-12-30 |
Family
ID=54977187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520570354.XU Expired - Fee Related CN204928089U (en) | 2015-08-03 | 2015-08-03 | Electric locomotive is with protection device in high -pressure voltage transformer net side return circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204928089U (en) |
-
2015
- 2015-08-03 CN CN201520570354.XU patent/CN204928089U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110907742A (en) | Device for inhibiting excitation surge current of locomotive and method for monitoring surge current and overvoltage | |
| CN201383671Y (en) | Neutral point grounding protective device of transformer | |
| CN105305398B (en) | A kind of super-pressure GIS fast transient overvoltage suppression systems | |
| CN204928089U (en) | Electric locomotive is with protection device in high -pressure voltage transformer net side return circuit | |
| CN201066670Y (en) | Over-voltage protection device for neutral point of transformer | |
| CN203260987U (en) | High-voltage line lightning arrester | |
| CN201388042Y (en) | Central high-voltage switch equal-height cabinet | |
| CN204834551U (en) | Novel fuse protective case for high tension switchgear | |
| CN109411168B (en) | Method for enabling low-voltage lightning arrester to have automatic separation function | |
| CN206947154U (en) | A kind of compound transformer | |
| CN201387999Y (en) | Central high-low cabinet type intelligent arc extinction, harmonic elimination and route selection device | |
| CN207082434U (en) | A kind of protective relaying device of dry-type high-voltage self-healing type parallel condenser | |
| CN105261269A (en) | Simulation model restraining ferromagnetic resonance of power system | |
| CN201388009Y (en) | Central isolated handcart type arc extinction, harmonic elimination and route selection device | |
| CN204694796U (en) | Surge arrester failure indicating device | |
| CN205901237U (en) | Real -time protection device of cable sheath | |
| CN110165646A (en) | A kind of cable shield electric current bleeder | |
| CN201388051Y (en) | GG-1A type arc extinguishing and harmonic eliminating line selection device | |
| CN203589681U (en) | Vehicle-mounted high-voltage fusing high-resistance isolation protection device using resistance-capacitance circuit to perform arc extinguishing | |
| CN203503444U (en) | Lightning protection transformer | |
| CN218241461U (en) | Lightning protection device for 10kV rod-shaped composite insulator | |
| CN107464692A (en) | A kind of protective relaying device and its method of dry-type high-voltage self-healing type parallel condenser | |
| CN202145399U (en) | Lightning arrester for protecting transformer neutral point for ungrounded neutral system | |
| CN201044232Y (en) | Device for extinguishing arc, extinguishing harmony, selecting line and over-voltage protection | |
| CN211955631U (en) | Monitoring device for excitation surge current and overvoltage of locomotive |
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: 20151230 Termination date: 20200803 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |