Related Experiment Video
Updated: Apr 21, 2026
07:43
A Simple Approach to Perform TEER Measurements Using a Self-Made Volt-Amperemeter with Programmable Output Frequency
Published on: October 5, 2019
21.9K
[Development of residual voltage testing equipment].
Summary
This study introduces a novel residual voltage detection method that precisely cuts power at peak voltage. The new technique accurately displays residual voltage waveforms immediately after power interruption, improving measurement accuracy.
Area of Science:
- Electrical Engineering
- Measurement Science
Context:
- Existing residual voltage measurement methods struggle with precise power cutoff at peak voltage and simultaneous waveform display.
- Accurate measurement of residual voltage is crucial for power system analysis and protection.
Purpose:
- To develop a new residual voltage detection method that overcomes the limitations of existing techniques.
- To enable exact power cutoff at peak voltage and immediate display of residual voltage waveforms.
Summary:
- A novel residual voltage detection method utilizes a zero-cross detection circuit and a single-chip microcomputer to identify the power supply's zero point.
- The microcomputer controls a relay to switch off power precisely at the peak voltage, triggered by a delayed signal from the zero point detection.
- The resulting residual voltage waveform is displayed on a computer or oscilloscope, with experimental results showing high accuracy and a standard deviation below 0.2 V.
Impact:
- Enables precise power cutoff at peak voltage for residual voltage measurements.
- Facilitates accurate and immediate display of residual voltage waveforms post-power interruption.
- Offers a significant improvement in the accuracy and reliability of residual voltage measurements in electrical systems.
Related Concept Videos
01:30Potentiometer
2.8K
Voltage and current measurements using a standard voltmeter and ammeter alter the circuit being measured either by drawing or resisting the current flow, which introduces uncertainties in the measurements. Null measurements balance the voltages so that no current flows through the measuring device and, therefore, no alterations occur in the measured circuit.
Suppose the emf of a battery needs to be measured. If the battery is directly connected to a standard voltmeter, the measured quantity is...
Suppose the emf of a battery needs to be measured. If the battery is directly connected to a standard voltmeter, the measured quantity is...
2.8K
01:23Voltage Doubler Circuit
2.3K
A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.
2.3K
01:21Three-Phase Short Circuit—Unloaded Synchronous Machine
915
Conducting a three-phase short circuit test on an unloaded synchronous machine helps understand its impact on the system. The AC fault current's oscillogram, with the DC offset removed, reveals that the waveform amplitude decreases from an initially high value to a steady-state level for one phase of the machine.
This behavior occurs due to the magnetic flux produced by the short-circuit armature currents. Initially, these currents follow high-reluctance paths but eventually shift to...
This behavior occurs due to the magnetic flux produced by the short-circuit armature currents. Initially, these currents follow high-reluctance paths but eventually shift to...
915
01:07Residual Plots
4.7K
A residual plot is a statistical representation of data used to analyze correlation and regression results. It helps verify the requirements for drawing specific conclusions about correlation and regression. To obtain the residual plot, first, the residual for each data value is calculated, which is simply the vertical distance between the observed and the predicted value obtained from the regression equation.
When the residual values are plotted against the variable x, it is called a residual...
When the residual values are plotted against the variable x, it is called a residual...
4.7K
01:25Multiple Voltage Sources
1.9K
Generally, a single battery is not enough to power some devices. In such cases, batteries can be combined in two ways: in series or in parallel.
In series, the positive terminal of one battery is connected to the negative terminal of another battery. Hence, the voltage of each battery is added to give the net voltage, which is increased because each battery boosts the electrons that enter it. The same current flows through each battery because they are connected in series.
Batteries are...
In series, the positive terminal of one battery is connected to the negative terminal of another battery. Hence, the voltage of each battery is added to give the net voltage, which is increased because each battery boosts the electrons that enter it. The same current flows through each battery because they are connected in series.
Batteries are...
1.9K
01:18Voltmeter
3.2K
A voltmeter is an electrical device that measures the potential difference or voltage between two points. It is connected in parallel with the circuit element it is measuring. A parallel connection is used because elements in parallel experience the same potential difference. The voltmeter is represented by the symbol "V ".
An ideal voltmeter would have infinite resistance, so connecting it between two points in a circuit would not alter any of the currents. Real voltmeters always have...
An ideal voltmeter would have infinite resistance, so connecting it between two points in a circuit would not alter any of the currents. Real voltmeters always have...
3.2K