RU2260810C1 - Method for measuring the resistance of the grounded circuit of a contact-line supporting structures - Google Patents
Method for measuring the resistance of the grounded circuit of a contact-line supporting structures Download PDFInfo
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- RU2260810C1 RU2260810C1 RU2004117332/09A RU2004117332A RU2260810C1 RU 2260810 C1 RU2260810 C1 RU 2260810C1 RU 2004117332/09 A RU2004117332/09 A RU 2004117332/09A RU 2004117332 A RU2004117332 A RU 2004117332A RU 2260810 C1 RU2260810 C1 RU 2260810C1
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Abstract
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Изобретение относится к измерительной технике и может найти применение для измерения сопротивления цепи заземления опор контактной сети электрифицированных железных дорог, работающих на постоянном токе, с быстро изменяющимся потенциалом на рельсах, наведенным проходящими поездами.The invention relates to measuring equipment and can be used to measure the resistance of the ground circuit of the supports of the contact network of electrified railways operating on direct current, with rapidly changing potential on the rails induced by passing trains.
В "Указаниях по техническому обслуживанию и ремонту опорных конструкций контактной сети" М., 1996, стр.11-12, п.3.2.8. [1] предлагают измерять сопротивление цепи заземления отдельных опор или входное сопротивление группового заземления двумя приборами - методом вольтметра-амперметра. Показания обоих приборов записывать синхронно и затем делить значение разности потенциалов на ток утечки. Измерения предлагают производить при потенциале на рельсах 8-10 В.In the "Instructions for the maintenance and repair of supporting structures of the contact network" M., 1996, pp. 11-12, clause 3.2.8. [1] propose measuring the resistance of the grounding circuit of individual supports or the input resistance of group grounding with two instruments - a voltmeter-ammeter method. Record the readings of both instruments synchronously and then divide the value of the potential difference by the leakage current. Measurements are proposed to be made at a potential on rails of 8-10 V.
Недостатком этого способа является низкая точность измерения, обусловленная резко изменяющимся наведенным потенциалом на рельсах.The disadvantage of this method is the low accuracy of the measurement, due to the abruptly changing induced potential on the rails.
В "Указаниях по техническому обслуживанию и ремонту опорных конструкций сети", М., 2003, стр.10, п.4.2.8. [2] предлагается использовать тот же способ амперметра-вольтметра, только расширяется круг приборов для его применения.In the “Instructions for the maintenance and repair of network support structures”, M., 2003, p. 10, clause 4.2.8. [2] it is proposed to use the same method of an ammeter-voltmeter, only the range of devices for its application is expanding.
В связи с более поздней публикацией способ, описанный в [2], выбран нами в качестве прототипа. Его недостаток - низкая точность измерения электросопротивления - сохранился или даже усилился, т.к., например, для измерения силы тока и разности потенциалов прибором АДО требуется ручное переключение прибора с одного вида измерений на другой, что недопустимо при быстро изменяющемся потенциале на рельсах.In connection with a later publication, the method described in [2] was chosen by us as a prototype. Its disadvantage, the low accuracy of measuring electrical resistance, has been preserved or even strengthened, because, for example, to measure the current strength and potential difference with an ADO device, it is necessary to manually switch the device from one type of measurement to another, which is unacceptable with a rapidly changing potential on rails.
Целью изобретения является повышение точности измерения сопротивления.The aim of the invention is to improve the accuracy of measuring resistance.
Для достижения указанной цели предлагаем способ измерения цепи заземления опор контактной сети электрифицированных железных дорог, работающих на постоянном токе, с быстро изменяющимся потенциалом на рельсах, наведенным проходящими поездами, включающий измерение разности потенциалов "рельс-земля" и силы тока в цепи заземления "рельс-опора" или "рельс-трос группового заземления", отличающийся тем, что измерение разности потенциалов и силы тока производится одним прибором со скоростью перекоммутации, по крайней мере вдвое большей скорости изменения потенциала на рельсах.To achieve this goal, we propose a method for measuring the grounding circuit of the supports of the contact network of electrified railways operating on direct current, with rapidly changing potential on the rails induced by passing trains, including measuring the potential difference "rail-ground" and the current strength in the grounding circuit "rail- support "or" rail-cable of group grounding, characterized in that the measurement of the potential difference and current strength is carried out by one device with a switching speed of at least twice the speed and capacity changes on rails.
При этом электросопротивление цепи заземления измеряется многократно в течение нескольких секунд при наведенном потенциале на рельсах 8-10 В, а затем усредняется.In this case, the electrical resistance of the ground circuit is measured many times over several seconds at the induced potential on the rails of 8-10 V, and then averaged.
Предлагаемый способ осуществляется следующим образом: прибор включается по схеме, приведенной на фиг.1, где 1 - опора, 2 - рельс, 3 - цепь заземления, 4 - искровой промежуток, 5 - изолятор, 6 - прибор.The proposed method is as follows: the device is turned on according to the circuit shown in figure 1, where 1 is the support, 2 is the rail, 3 is the ground circuit, 4 is the spark gap, 5 is the insulator, 6 is the device.
Структурная схема прибора приведена на фиг.2, где 1, 2 - входные клеммы, 3 - блок коммутации, 4 - блок обработки, управления и индикации.The block diagram of the device is shown in figure 2, where 1, 2 are input terminals, 3 is a switching unit, 4 is a processing, control and indication unit.
Таким образом, предлагаемый способ позволяет производить точное измерение электросопротивления цепи заземления опор контактной сети прямым методом (амперметра-вольтметра) при быстро изменяющемся наведенном потенциале на рельсах.Thus, the proposed method allows for accurate measurement of the electrical resistance of the ground circuit of the supports of the contact network by the direct method (ammeter-voltmeter) with a rapidly changing induced potential on the rails.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2004117332/09A RU2260810C1 (en) | 2004-06-07 | 2004-06-07 | Method for measuring the resistance of the grounded circuit of a contact-line supporting structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2004117332/09A RU2260810C1 (en) | 2004-06-07 | 2004-06-07 | Method for measuring the resistance of the grounded circuit of a contact-line supporting structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RU2260810C1 true RU2260810C1 (en) | 2005-09-20 |
| RU2004117332A RU2004117332A (en) | 2005-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| RU2004117332/09A RU2260810C1 (en) | 2004-06-07 | 2004-06-07 | Method for measuring the resistance of the grounded circuit of a contact-line supporting structures |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2657867C2 (en) * | 2013-06-26 | 2018-06-18 | Шнейдер Электрик Эндюстри Сас | Method for evaluating electrical impedance connection to ground, method for evaluating power system and corresponding power system |
| RU2795909C1 (en) * | 2022-11-29 | 2023-05-15 | Владислав Борисович Наседкин | Device for monitoring the breakdown voltage of the means of protecting the supports of the contact network and measuring rail-to-earth potential on electrified railways |
-
2004
- 2004-06-07 RU RU2004117332/09A patent/RU2260810C1/en not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| \Указания по техническому обслуживанию к ремонту опорных конструкций сети\, Москва, 2003, с.10. * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2657867C2 (en) * | 2013-06-26 | 2018-06-18 | Шнейдер Электрик Эндюстри Сас | Method for evaluating electrical impedance connection to ground, method for evaluating power system and corresponding power system |
| RU2795909C1 (en) * | 2022-11-29 | 2023-05-15 | Владислав Борисович Наседкин | Device for monitoring the breakdown voltage of the means of protecting the supports of the contact network and measuring rail-to-earth potential on electrified railways |
| RU2807456C1 (en) * | 2023-06-05 | 2023-11-15 | Юрий Анатольевич Калинчук | Device for monitoring resistance of railway contact network supports |
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| Publication number | Publication date |
|---|---|
| RU2004117332A (en) | 2005-11-20 |
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| PC4A | Invention patent assignment |
Effective date: 20090625 |
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| MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20180608 |