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SU140490A1 - Device to compensate for measuring current transformer errors - Google Patents

Device to compensate for measuring current transformer errors

Info

Publication number
SU140490A1
SU140490A1 SU694862A SU694862A SU140490A1 SU 140490 A1 SU140490 A1 SU 140490A1 SU 694862 A SU694862 A SU 694862A SU 694862 A SU694862 A SU 694862A SU 140490 A1 SU140490 A1 SU 140490A1
Authority
SU
USSR - Soviet Union
Prior art keywords
transformer
measuring current
circuit
compensate
current transformer
Prior art date
Application number
SU694862A
Other languages
Russian (ru)
Inventor
Н.П. Емельянов
нов Н.П. Емель
Л.И. Цепляев
ев Л.И. Цепл
Original Assignee
нов Н.П. Емель
ев Л.И. Цепл
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 нов Н.П. Емель, ев Л.И. Цепл filed Critical нов Н.П. Емель
Priority to SU694862A priority Critical patent/SU140490A1/en
Application granted granted Critical
Publication of SU140490A1 publication Critical patent/SU140490A1/en

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  • Transformers For Measuring Instruments (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Description

Устройства дл  компенсации погрешности измерительных траноформаторов тока путем подачи в цепь вторичной обмотки трансформатора дополнитСоНьного переменного напр жени , компенсирующего намагничивающий ток трансформатора, известны. Изобретение имеет целью улучшить компенсацию.Devices for compensating for the error of measuring current transformers by supplying a transformer secondary winding with an additional AC voltage to compensate for the magnetizing current of a transformer are known. The invention aims to improve compensation.

Отличительной особенностью предлагаемого устройства  вл етс  применение в качестве источника компенсирующего напр жени  электронного усилител , вход которого подключен к сопротивлению, включенному в цепь вторичной обмотки трансформатора, тогда как выход усилител  включен последовательно в цепь той же обмотки.A distinctive feature of the proposed device is the use of an electronic amplifier as a source of compensating voltage, the input of which is connected to a resistance connected to the secondary winding of a transformer, while the output of the amplifier is connected in series to the same winding.

Трансформатор устройства может быть снабжен дополнительно обмоткой, по отсутствию напр жени  на зажимах которой суд т о дастижении компенсации.The device transformer can be additionally equipped with a winding, due to the absence of voltage on the terminals of which is judged to give compensation.

На чертеже приведена электрическа  схема устройства. Устройство содержит электронный усилитель У и сопротивлени  Zi и Zg, включенные в цепь вторичной обмотки измерительного трансформатора ТТ. .1: л .2 -ток в силовой цепи и ток во вторичной обмотке трансформатора.The drawing shows the electrical circuit of the device. The device contains an electronic amplifier U and resistances Zi and Zg, included in the secondary circuit of the measuring transformer CT. .1: l .2 -current in the power circuit and current in the secondary winding of the transformer.

Коэффициент усилени  усилител  У выбираетс  таким, чтобы э.д.с. на выходе усилител  была равна произведению приведенного ко вторичной обмотке значени  тока ./i силовой цепи на сопротивление вторичной цепи.The gain of the amplifier Y is chosen so that the emf. at the output of the amplifier, it was equal to the product of the current value reduced to the secondary winding ./i of the power circuit and the resistance of the secondary circuit.

В этом случае ток намагничивани  трансформатора тока полностью компенсируетс , а следовательно, равна нулю погрешность трансформатора.In this case, the magnetizing current of the current transformer is fully compensated, and therefore, the error of the transformer is zero.

Усил1тель должен точно воспроизводить форму кривой усиливаемого сигнала и иметь стабильный коэффициент усилени .The amplifier must accurately reproduce the shape of the amplified signal curve and have a stable gain.

№ 140490 Предмет изобретени No. 140490 Subject of the invention

Claims (2)

1.Устройство дл  компенсации погрешности измерительных трансформаторов тока путем подачи в цепь вторичной обмотки трансформатора дополнительного переменного напр жени , компенсирующего намагничивающий ток трансформатора, отличающейс  тем, что, с целью улучшени  компенсации, в качестве источника компенсирующего напр л епи  применен электронный усилитель, вход которого подключен к сопротивлению, включенному в цепь вторичной обмотки трансформатора , а выход последовательно в цепь той же обмотки.1. A device for compensating the error of measuring current transformers by supplying an additional alternating voltage to the secondary winding circuit of the transformer, compensating the magnetizing current of the transformer, characterized in that, in order to improve the compensation, an electronic amplifier is used whose input is connected to the resistance included in the circuit of the secondary winding of the transformer, and the output is sequentially in the circuit of the same winding. 2.В устройстве по п. 1 применение в трансформаторе, дополнительной обмотки, надетой на сердечник трансформатора и предназначенной дл  контрол  достижени  компенсации по отсутствию напр жени  на его зажимах.2. In the device according to claim 1, an application in a transformer is an additional winding worn on the core of the transformer and intended to control the achievement of compensation for the absence of voltage on its terminals. - 2 - 2
SU694862A 1961-01-25 1961-01-25 Device to compensate for measuring current transformer errors SU140490A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU694862A SU140490A1 (en) 1961-01-25 1961-01-25 Device to compensate for measuring current transformer errors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU694862A SU140490A1 (en) 1961-01-25 1961-01-25 Device to compensate for measuring current transformer errors

Publications (1)

Publication Number Publication Date
SU140490A1 true SU140490A1 (en) 1961-11-30

Family

ID=48296492

Family Applications (1)

Application Number Title Priority Date Filing Date
SU694862A SU140490A1 (en) 1961-01-25 1961-01-25 Device to compensate for measuring current transformer errors

Country Status (1)

Country Link
SU (1) SU140490A1 (en)

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