SU711497A1 - Method of testing insulation in circuits with earthed neutral wire under operating voltage and load - Google Patents
Method of testing insulation in circuits with earthed neutral wire under operating voltage and load Download PDFInfo
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- SU711497A1 SU711497A1 SU772513582A SU2513582A SU711497A1 SU 711497 A1 SU711497 A1 SU 711497A1 SU 772513582 A SU772513582 A SU 772513582A SU 2513582 A SU2513582 A SU 2513582A SU 711497 A1 SU711497 A1 SU 711497A1
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- insulation
- phase
- difference
- maximum
- conductivities
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- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Testing Relating To Insulation (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
(54) СПОСОБ КОНТРОЛЯ ИЗОЛЯЦИИ В СЕТЯХ(54) METHOD OF INSULATION CONTROL IN NETWORKS
С ЗАЗЕМЛЕННОЙ НЕЙТРАЛЬЮ ПРИ РАБОЧЕМ НАПРЯЖЕНИИ И НАГРУЗКЕWITH GROUNDED NEUTRAL DURING VOLTAGE AND LOADING
Изобретение относитс к области электроизмерительной техники и может быть использовано-нри определении местоположени повреждений в сети с заземленной нейтралью.The invention relates to the field of electrical measuring equipment and can be used in determining the location of faults in a network with a grounded neutral.
Известен способ определени мест ухудшени изол ци в трехфазной сети , основанный на измерении тока нулевой последовательности 1.A known method for determining the places of degraded insulation in a three-phase network is based on measuring the zero-sequence current 1.
Недостатком этого способа вл етс невозможность определени поврежденной жилы.The disadvantage of this method is the impossibility of determining the damaged vein.
Наиболее близким по технической сущности к предлагаемому вл етс 1 способ контрол изол ции в сет х с; изолированной нейтралью при рабочем напр жении и нагрузке основанный на измерении модул тока нулевой последовательности 2.The closest in technical essence to the proposed is 1 method of controlling insulation in networks with; insulated neutral at operating voltage and load based on measurement of zero sequence current modulus 2.
Недостатком этого способа вл етс больша трудоемкость и необходимость проведени больших расчетов.The disadvantage of this method is the great complexity and the need for large calculations.
Целью изобретени вл етс noBbfшение быстродействи и надежности.The aim of the invention is to noBbf speed and reliability.
Дл достижени этой цели в известном способе контрол изол ции в сет х с заземленной нейтралью при рабочем напр жении и нагрузке, основанном на измерении модул тока нулевой последовательности, определ ют соотношение проводимостей изол ции сети по токам нулевой последовательности , выравнивают значени проводимостей изол ции фаз до среднего значени , определ ют разностьпроводимостей между отдельными фазами и компенсируют естественные токи нулевой последовательности.To achieve this goal, in a known method of insulating insulation in networks with grounded neutral under operating voltage and load, based on measuring the zero-sequence current modulus, determine the ratio of the conductance of the network insulation to the zero-sequence current, equalize the values of the conductance of the phase insulation to average values, determine the difference in conductivities between the individual phases and compensate for the natural currents of the zero sequence.
на чертеже представлена функциональна схема устройства, реализующего измерени по данному способу, ино содержит измерительный орган 1, посто нное активное сопротивление 2 и м.агазин сопротивлений 3.The drawing shows a functional diagram of a device that implements measurements in this method, ino contains measuring body 1, constant active resistance 2 and m. resistance shop 3.
Измерительный орган 1 включает в себ трансформатор тока нулевой последовательности (ТТНП) 4, сердечникThe metering body 1 includes a zero-sequence current transformer (TTPC) 4, a core
которого охватывает все фазы сети, а измерительна обмотка соединена со входом усилител 5, выход которого подключен к микроамперметру 6. Процесс измерени по данному способу заключаетс в следующим.which covers all phases of the network, and the measuring winding is connected to the input of amplifier 5, the output of which is connected to the microammeter 6. The measurement process of this method is as follows.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772513582A SU711497A1 (en) | 1977-08-01 | 1977-08-01 | Method of testing insulation in circuits with earthed neutral wire under operating voltage and load |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772513582A SU711497A1 (en) | 1977-08-01 | 1977-08-01 | Method of testing insulation in circuits with earthed neutral wire under operating voltage and load |
Publications (1)
Publication Number | Publication Date |
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SU711497A1 true SU711497A1 (en) | 1980-01-25 |
Family
ID=20720482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU772513582A SU711497A1 (en) | 1977-08-01 | 1977-08-01 | Method of testing insulation in circuits with earthed neutral wire under operating voltage and load |
Country Status (1)
Country | Link |
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SU (1) | SU711497A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5343155A (en) * | 1991-12-20 | 1994-08-30 | The Research And Development Institute, Inc. At Montana State University | Fault detection and location system for power transmission and distribution lines |
-
1977
- 1977-08-01 SU SU772513582A patent/SU711497A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5343155A (en) * | 1991-12-20 | 1994-08-30 | The Research And Development Institute, Inc. At Montana State University | Fault detection and location system for power transmission and distribution lines |
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