Automated Test Stand for Transformer Inrush Current Measurement

2018 ◽  
Author(s):  
Michal Bonislawski ◽  
Marcin Holub ◽  
Pawel Waszczuk ◽  
Wojeciech Lewanski
Keyword(s):  
Current Measurement ◽  
Test Stand ◽  
Inrush Current ◽  
Automated Test

Inrush Current Measurement for Transient Space Characterization and Fault Detection

2021 ◽  
pp. 1-1
Author(s):  
Erik K. Saathoff ◽  
Daisy H. Green ◽  
Rebecca A. Agustin ◽  
Joseph O'Connell ◽  
Steven B. Leeb
Keyword(s):  
Fault Detection ◽  
Current Measurement ◽  
Inrush Current ◽  
Space Characterization

scholarly journals A Low-Cost Transcutaneous Electrical Nerve Stimulation Measuring Device Using Frequency-to-Voltage and Current-to-Voltage

2020 ◽  
Vol 2 (2) ◽  
pp. 65-70
Author(s):  
Alfita Kurniawati ◽  
Torib Hamzah ◽  
Tri Bowo Indrato
Keyword(s):  
Nerve Stimulation ◽  
Transcutaneous Electrical Nerve Stimulation ◽  
Low Cost ◽  
Current Measurement ◽  
Average Error ◽  
Inrush Current ◽  
Measuring Device ◽  
Electrical Nerve Stimulation ◽  
Instrument Calibration ◽  
Current Value

The use of Transcutaneous Electrical Nerve Stimulation (TENS) therapeutic devices to reduce the complexity of the patients continuing can cause an increase in the performance of the tool. The purpose of this study is to design a tool to calibrate TENS. The contribution of this study is the ease of users when performing TENS calibration because it can display the shape of the signal, the frequency value in units of Hz, as well as the current value in units of mA directly. To match the frequency and current according to the position of the red electrode cable it must be higher than the position of the black electrode cable. The frequency-to-voltage that is changed then entered is converted into a voltage to be processed using Arduino. Then also with the current-to-voltage which changes the inrush current and then is converted into a voltage to be processed using Arduino. The results showed that the frequency values ​​in all settings had an average error of 0.018 while the average error of the current in all settings was 0.25. At the frequency, a measurement obtained highest uncertainty value of UA is 1.6, UB is 0, and the highest U95 is 6.88 while in the current measurement obtained the highest uncertainty value of UA is 0.19, UB is 0, and highest U95 is 0.392. The results of this study can be applied to the field of calibration, specifically the TENS therapy instrument calibration

scholarly journals DEVELOPMENT OF AN AUTOMATED TEST STAND FOR THE ADAPTIVE PART OF THE AIRCRAFT WING

2020 ◽  
pp. 56-59
Author(s):  
M. Vetlitsyn ◽  
A. Ivchenko ◽  
N. Sharonov
Keyword(s):  
Test Stand ◽  
Aircraft Wing ◽  
Automated Test

Methods for improving the efficiency of aircraft wing mechanization are discussed. The designs of prototype profiles and automated test stand for the adaptive part of the adaptive part of the wing are presented.

Injection Current into the Power Transformer as an Internal Fault Phenomena for Measuring the Differential Relay Performance

2020 ◽  
Vol 19 (6) ◽  
pp. 443-451
Author(s):  
Arief Goeritno ◽  
Irwan Nugraha ◽  
Syofyan Rasiman ◽  
Ayumi Johan
Keyword(s):  
Loading Condition ◽  
Current Flow ◽  
Power Transformer ◽  
Current Measurement ◽  
Inrush Current ◽  
Protection Zone ◽  
The Third ◽  
Internal Fault ◽  
Protection Area ◽  
Current Value

In this paper explains the classical aspects in measure the differential relay performance. The classical aspects use the simulation through inrush current into the power transformer under three conditions. The first condition is giving the normal phenomenon as phenomenon of loading, the second condition is giving the fault phenomenon for outside of the protection zone, and the third condition is giving the fault phenomenon for inside of the protection zone. The result of measurement during loading condition, the differential relay not operate, because relay is set with value of 130% of the largest current between the three phases, so that the adjustable current is 4.45 mA. The results of current measurement to the differential relay when the fault condition is provided outside of the protection area, the current value to the differential relay should of zero mA and the differential relay not operate. The result of measurement of the current flow to the differential relay when giving the fault phenomenon inside the protection zone is obtained flow to relay at the phase-R is 127.7 mA, phase-S is 123.9 mA, and phase-T equal to 123.8 mA, while the result of calculation of the current flow to the differential relay of each phase of 152.61 mA, and the differential relay operate. After giving all of three conditions, the differential relay performance is known.

Determination of Inorganic Phosphate in Paprika Hydroponic Solution using a Laboratory-made Automated Test Stand with Cobalt-based Electrodes

2011 ◽  
Vol 36 (5) ◽  
pp. 326-333 ◽  
Author(s):  
Hak-Jin Kim ◽  
Dong-Wook Son ◽  
Soon-Goo Kwon ◽  
Mi-Young Roh ◽  
Chang-Ik Kang ◽  
...  
Keyword(s):  
Inorganic Phosphate ◽  
Test Stand ◽  
Hydroponic Solution ◽  
Automated Test

Digitally Controlled AC Current Measurement and Protection Techniques

MACRo 2015 ◽  
2017 ◽  
Vol 2 (1) ◽  
pp. 57-65
Author(s):  
László-Zsolt Turos ◽  
Géza Csernáth ◽  
István Hegyi
Keyword(s):  
Voltage Drop ◽  
Short Circuit ◽  
Cost Effective ◽  
Current Measurement ◽  
Inrush Current ◽  
Digitally Controlled ◽  
Inrush Currents ◽  
Ac Current ◽  
Microcontroller Unit ◽  
Dc Current

AbstractThis paper describes a cost effective AC current measurement method that avoids complex AC to DC current measurements by converting an amplified and rectified AC voltage drop across a shunt resistor to a duty cycle of a PWM signal. The current measurement chain output is fed into a microcontroller unit (MCU) and into a short circuit protection block that inhibits AC load drivers in case of overcurrent or short circuit events, overriding the state set by the MCU control algorithm. The authors present a mathematical model, simulations and a practical evaluation of custom-developed circuits that are capable to reach a convincing level of measurement precision. By counting a given number of consecutive AC periods, the effect of inrush current generated by inductive AC loads is filtered. The proposed solution allows inrush currents up to 3A, fitting the consumption range of AC control elements met in household application circuits, such as relays or solenoid valves.

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