CN201690210U - Direct current traction power supply negative electrode unit frame leakage testing and protecting device - Google Patents

Direct current traction power supply negative electrode unit frame leakage testing and protecting device Download PDF

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Publication number
CN201690210U
CN201690210U CN2010201482460U CN201020148246U CN201690210U CN 201690210 U CN201690210 U CN 201690210U CN 2010201482460 U CN2010201482460 U CN 2010201482460U CN 201020148246 U CN201020148246 U CN 201020148246U CN 201690210 U CN201690210 U CN 201690210U
Authority
CN
China
Prior art keywords
direct current
negative electrode
power supply
traction power
voltage
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
Application number
CN2010201482460U
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Chinese (zh)
Inventor
朱祥连
朱忠建
阚劲松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhenjiang Daqo Secheron Traction Power Co Ltd
Original Assignee
Zhenjiang Daqo Secheron Traction Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhenjiang Daqo Secheron Traction Power Co Ltd filed Critical Zhenjiang Daqo Secheron Traction Power Co Ltd
Priority to CN2010201482460U priority Critical patent/CN201690210U/en
Application granted granted Critical
Publication of CN201690210U publication Critical patent/CN201690210U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a direct current traction power supply negative electrode unit frame leakage testing and protecting device in an urban rail traffic device power supply system, which comprises a steel rail and a direct current device shell, wherein the steel rail is connected with a system negative electrode, and the direct current device shell insulates with a system positive electrode. The direct current traction power supply negative electrode unit frame leakage testing and protecting device further comprises a current relay and two voltage relays, wherein one end of the current relay is connected with the direct current device shell, the other end is connected with the ground, one ends of the two voltage relays are connected with the direct current device shell after the two voltage relays are connected in parallel, and the other ends are connected with the system negative electrode. The two voltage relays which are connected in parallel are connected with the system negative electrode through a high voltage fuse. The direct current traction power supply negative electrode unit frame leakage testing and protecting device can increase the reaction rate and the accuracy of leakage protection of a frame through collaborative monitoring of current elements and voltage elements, and greatly increases the protection reliability.

Description

Direct-current traction power supply negative pole unit framework leak-testing and protective device
Technical field
The utility model relates to direct-current traction power supply negative pole unit framework leak-testing and the protective device in a kind of urban track traffic power devices system.
Background technology
In the DC traction power-supply system of urban rail transit vehicles, the framework leak protection of negative pole cabinet is mainly used to protection equipment and personal safety, and there are defectives such as reaction speed is slow, poor reliability mostly in existing protective device.
Summary of the invention
Technical problem to be solved in the utility model is, provides that a kind of reaction speed is fast, high direct-current traction power supply negative pole unit framework leak-testing and the protective device of protection reliable in action.
Direct-current traction power supply negative pole unit framework leak-testing of the present utility model and protective device include the rail that is connected with the system negative pole and with the DC equipment shell of the anodal insulation of system, also include a current relay and two voltage relays; Current relay one end connects DC equipment shell, other end ground connection; An end connects DC equipment shell, other end connected system negative pole after two voltage relay parallel connections.Two voltage relays of described parallel connection are connected with the system negative pole through high-tension fuse.
The utility model can improve the reaction speed and the accuracy of framework leak protection by current element and voltage component synergic monitoring, and the reliability of protection improves greatly.
Description of drawings
Fig. 1 is the schematic diagram of the utility model embodiment.
Embodiment
As shown in the figure, this device include the rail A that is connected with the system negative pole and with the DC equipment shell B of the anodal insulation of system, also include a current relay K4H1 and two voltage relay K4E1, K4F1; Current relay K4H1 one end connects DC equipment shell, other end ground connection; An end connects the DC equipment shell after two voltage relay parallel connections, and the other end is through high-tension fuse F4D1 connected system negative pole.S26D1 among the figure is a universal seclector, is used for the switching of Selection Framework voltage alarm element; S26D2 is a universal seclector also, is used for the switching of Selection Framework shunt tripping element.
Select at S26D1, S26D2 under the situation of " inputs ", K4E1, K4F1 link to each other with the system cathode bus bar by high-tension fuse F4D1, another termination frame protection, be respectively applied for corresponding two-stage voltage protection.K4H1 one termination frame protection ground, other end welding system ground, the framework electric current that is used to move leaks, K4H1 need not additional power supply, can guarantee system in service safe, reliably, move the raising security of system fast.
In the said apparatus, current element one head joint equipment shell, other end ground connection, main checkout equipment shell leakage current over the ground.Under normal operation, current detection circuit does not have electric current to pass through.When the positive pole of any one DC equipment during to shell generation insulation damages, earth current flows into earth mat by current element, gets back to rail (negative pole) by the bleeder resistance between rail and the ground (or current drainage cabinet) again.When earth current reaches setting value, the current element action, connection is jumped the our station circuit breaker, and connection is jumped adjacent station respective circuit breakers as required.
The uncertainty of the via resistance of flowing through owing to electric current (mainly being rail insulation against ground resistance) along with the performance of insulating material changes, the requirement that may cause frame protection current element detected value not reach setting value, the frame protection current element is failure to actuate.For be used the voltage component one head joint equipment shell in the device, another termination rail, the leakage voltage of detection negative pole and device housings with voltage component.Because small resistor can ignore, can think the direct ground connection of device housings, the detected voltage of voltage component is equivalent to the voltage between rail and the ground.When the positive pole of any one DC equipment during to shell generation insulation damages, earth potential raises, and voltage component can detect a voltage between rail and ground.When this voltage during greater than the voltage component setting value, voltage component should move in the time of adjusting, and sends and reports to the police or the direct tripping operation respective circuit breakers cabinet of jumping in parallel.

Claims (2)

1. direct-current traction power supply negative pole unit framework leak-testing and protective device, include the rail that is connected with the system negative pole and with the DC equipment shell of the anodal insulation of system, it is characterized in that: further comprising has a current relay and two voltage relays; Current relay one end connects DC equipment shell, other end ground connection; An end connects DC equipment shell, other end connected system negative pole after two voltage relay parallel connections.
2. direct-current traction power supply negative pole unit framework leak-testing according to claim 1 and protective device is characterized in that: two voltage relays of described parallel connection are connected with the system negative pole through high-tension fuse.
CN2010201482460U 2010-04-02 2010-04-02 Direct current traction power supply negative electrode unit frame leakage testing and protecting device Expired - Fee Related CN201690210U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010201482460U CN201690210U (en) 2010-04-02 2010-04-02 Direct current traction power supply negative electrode unit frame leakage testing and protecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010201482460U CN201690210U (en) 2010-04-02 2010-04-02 Direct current traction power supply negative electrode unit frame leakage testing and protecting device

Publications (1)

Publication Number Publication Date
CN201690210U true CN201690210U (en) 2010-12-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010201482460U Expired - Fee Related CN201690210U (en) 2010-04-02 2010-04-02 Direct current traction power supply negative electrode unit frame leakage testing and protecting device

Country Status (1)

Country Link
CN (1) CN201690210U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103579932A (en) * 2013-11-12 2014-02-12 长城电器集团乐山宁格朗电气有限责任公司 Small-scale intelligent energy-saving box-type substation
CN104034972A (en) * 2013-03-08 2014-09-10 卡特彼勒公司 Fault detection system with leakage current detection
CN104880640A (en) * 2015-06-01 2015-09-02 镇江大全赛雪龙牵引电气有限公司 DC traction power supply system frame electric leakage monitoring apparatus
CN105799551A (en) * 2016-03-10 2016-07-27 南京金城轨道交通设备有限公司 Power supply device for APM rapid transit system
CN110780120A (en) * 2019-10-17 2020-02-11 西南交通大学 Urban rail transit direct current equipment insulation performance on-line monitoring system and control method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104034972A (en) * 2013-03-08 2014-09-10 卡特彼勒公司 Fault detection system with leakage current detection
CN104034972B (en) * 2013-03-08 2018-10-19 卡特彼勒公司 Fault detection system with leakage current detection
CN103579932A (en) * 2013-11-12 2014-02-12 长城电器集团乐山宁格朗电气有限责任公司 Small-scale intelligent energy-saving box-type substation
CN103579932B (en) * 2013-11-12 2015-11-18 宁格朗电气股份有限公司 Small intelligent energy-saving box-type transformer substation
CN104880640A (en) * 2015-06-01 2015-09-02 镇江大全赛雪龙牵引电气有限公司 DC traction power supply system frame electric leakage monitoring apparatus
CN105799551A (en) * 2016-03-10 2016-07-27 南京金城轨道交通设备有限公司 Power supply device for APM rapid transit system
CN105799551B (en) * 2016-03-10 2018-07-03 中车浦镇庞巴迪运输系统有限公司 APM rapid transit system (RTS)s are used for electric installation
CN110780120A (en) * 2019-10-17 2020-02-11 西南交通大学 Urban rail transit direct current equipment insulation performance on-line monitoring system and control method

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20101229

Termination date: 20180402

CF01 Termination of patent right due to non-payment of annual fee