SU1503027A1 - Method of determining insulation resistance of phases of electric mains - Google Patents

Method of determining insulation resistance of phases of electric mains Download PDF

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Publication number
SU1503027A1
SU1503027A1 SU874191561A SU4191561A SU1503027A1 SU 1503027 A1 SU1503027 A1 SU 1503027A1 SU 874191561 A SU874191561 A SU 874191561A SU 4191561 A SU4191561 A SU 4191561A SU 1503027 A1 SU1503027 A1 SU 1503027A1
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SU
USSR - Soviet Union
Prior art keywords
phases
voltage
phase
insulation resistance
network
Prior art date
Application number
SU874191561A
Other languages
Russian (ru)
Inventor
Евгений Федорович Цапенко
Семен Давидович Уманский
Дмитрий Николаевич Чучелов
Иван Иванович Карпов
Original Assignee
Московский Горный Институт
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Priority to SU874191561A priority Critical patent/SU1503027A1/en
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Publication of SU1503027A1 publication Critical patent/SU1503027A1/en

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Abstract

Изобретение относитс  к электротехнике , в частности, к методам косвенного определени  сопротивлени  изол ции электрических сетей, и может быть использовано дл  определени  параметров изол ции отдельных фаз электрической сети. Цель изобретени  - повышение точности и сокращение времени измерений. Способ предусматривает измерение модулей напр жени  второй и третьей в пор дке чередовани  фаз, шунтирование первой фазы на землю с помощью шунтирующего резистора, измерение модулей напр жени  на двух других фазах и расчет сопротивлени  отдельных фаз и емкости сети по формулам, приведенным в описании изобретени . Устройство, реализующее способ, содержит блок 2 управл емых шунтов, датчики 3 - 5 напр жени , управл емый коммутатор 6, аналого-цифровой преобразователь 7, блок 8 управлени , управл ющую электронно-вычислительную машину 9, блок 10 индикации, блок 11 регистрации. Дл  осуществлени  непрерывного контрол  сопротивлени  изол ции пофазно измер ют напр жение только двух фаз сети, точность определени  обеспечиваетс  выбором величины шунта в блоке 2, при котором напр жение фазы А измен етс  на величину более 15% от напр жени  фазы в исходном состо нии. 2 ил.The invention relates to electrical engineering, in particular, to methods for indirect determination of the insulation resistance of electrical networks, and can be used to determine the insulation parameters of individual phases of the electrical network. The purpose of the invention is to improve the accuracy and reduce the measurement time. The method involves measuring voltage modules of the second and third in order of phase alternation, shunting the first phase to earth with a shunt resistor, measuring voltage modules at the other two phases, and calculating the resistance of individual phases and network capacity using the formulas given in the description of the invention. The device implementing the method comprises a unit 2 controlled shunts, voltage sensors 3-5, a controlled switch 6, an analog-to-digital converter 7, a control unit 8, a control electronic computer 9, a display unit 10, a registration unit 11. To carry out continuous monitoring of the insulation resistance, the voltage of only two phases of the network is measured in phases. The accuracy of determination is ensured by selecting the shunt value in block 2, at which the voltage of phase A varies by more than 15% of the phase voltage in the initial state. 2 Il.

Description

{{

« Ь+И-(а+"B + i- (a +

Ча-аЧ (-Jl)- ) Cha-ach (-jl) -)

Claims (1)

1 Rl1 Rl R J.b ibibliiiJ3ia:iia::ali c (a-a )-(b-b )R J.b ibibliiiJ3ia: iia :: ali c (aa) - (bb) i.i.T- .i.i.T-. R, R,J ;R, R, J; Ь(4з- -а 1:Ь 14з+а2 B (4z- -a 1: b 14z + a2 3(ОГд1; а-а)+Ть-Ь1)3 (GGD1; a-a) + Tb-b1) 2 -22 -2 a a где г. - сопротивление шунтирующегоwhere g. is shunt resistance резистора;a resistor; (х - углова  частота сети; и, - номинальное линейное напр жение;(x is the angular frequency of the network; and, is the nominal linear voltage; UR, и,Ur and иj, и - соответственно напр жени  фаз В и С на землю до и после шунтировани  фазы А.ij, and - respectively, the voltages of phases B and C on the ground before and after the shunting of phase A. 152. Способ по п. 1, отличающийс  тем, что, с целью повышени  точности, выбор величины сопротивлени  шунтирующего резистора производ т из услови  изменени  напр же20 ни  фаз не ниже 15% при его подключении к сети.152. The method of claim 1, wherein, in order to increase the accuracy, the selection of the resistance value of the shunt resistor is carried out on the condition that the voltage of the phase is not less than 15% when it is connected to the network. УHave ФМ.1FM.1
SU874191561A 1987-01-05 1987-01-05 Method of determining insulation resistance of phases of electric mains SU1503027A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU874191561A SU1503027A1 (en) 1987-01-05 1987-01-05 Method of determining insulation resistance of phases of electric mains

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU874191561A SU1503027A1 (en) 1987-01-05 1987-01-05 Method of determining insulation resistance of phases of electric mains

Publications (1)

Publication Number Publication Date
SU1503027A1 true SU1503027A1 (en) 1989-08-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU874191561A SU1503027A1 (en) 1987-01-05 1987-01-05 Method of determining insulation resistance of phases of electric mains

Country Status (1)

Country Link
SU (1) SU1503027A1 (en)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Авторское свидетельство СССР № 595683, кл. G 01 R 27/18, 1978. Патент JP № 1958-47671, кл. G 01 R 27/18, 1978. *

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