Power transformers are one of the most important visions in today’s power transmission and distribution infrastructure. Unplanned repairs caused by faulty power terminals and transformers can become a huge expense. Therefore, it is particularly important to avoid transformer failures and perform reliable and efficient testing and diagnostics.
Here are two examples of Push,China’s tester for power transformers’ efficiency and safety on two aspects:capacitance inductance and On-Load Tap-Changer.
Function of a Capacitance Inductance Tester
A Capacitance Inductance Tester is a testing device used to measure the parameters of capacitance and inductance components in a circuit. It usually consists of a signal source, a measuring instrument and related control circuits. It can help engineers effectively optimize circuit design and detect whether components are working properly.
The basic principle of Capacitance Inductance Tester is to use an AC signal source to provide a signal of a specific frequency, input it into the capacitive or inductive component under test, and then measure the phase difference and amplitude ratio between the response signal and the input signal to calculate the component parameters.
- For capacitive components, the tester measures their capacitance and loss factor at a given frequency. The loss factor is the sum of dielectric loss and electrode loss, which reflects the degree of energy loss in the capacitor.
- For inductive components, the tester will measure its inductance value and quality factor at a given frequency. The quality factor is the energy storage efficiency of the inductor without internal impedance.
Capacitance Inductance Testers can help engineers select appropriate capacitance and inductance components in circuit design and verify whether their performance meets requirements. Additionally, it can be used for troubleshooting, such as checking whether capacitive or inductive components have failed or become damaged.
Features of China Capacitance Inductance Tester
Push,China’s Electrical Capacitance Inductance Testers usually have high accuracy, high speed and multiple test modes. For example, they can quickly scan the entire frequency range to obtain the frequency response of the component, and can automatically calculate a variety of parameters, thereby improving test efficiency and accuracy:
1. The Electrical Capacitance Inductance Tester can measure a single capacitance of a group of parallel capacitors without removing the wires (both single-phase capacitance and three-phase capacitance can be measured). At the same time, the instrument can also measure the inductance of various reactors and can also be used as a workpiece. Frequency current tester is used, one machine has three uses, meeting various uses on site.
2. During measurement, this Capacitance Inductance Tester not only displays the measured capacitance value or inductance value, but also displays the measured voltage, current, power, frequency, impedance, phase angle and other data, so as to better analyze the quality of the sample;
3. The Electrical Capacitance Inductance Tester uses a 240×128 large-screen LCD display with backlight, which can be clearly observed during the day and night. It has Chinese menu prompts and is easy to operate.
4. The Electrical Capacitance Inductance Tester has built-in large-capacity non-volatile memory: it can store 50 sets of measurement data.
5. The Capacitance Inductance Tester has a built-in high-precision real-time clock function: date and time calibration can be performed.
6. The Electrical Capacitance Inductance Tester comes with a high-speed micro thermal printer: it can print measurement and historical data.
7. Instrument test power supply over-current protection function: short circuit of the power supply output will not damage the instrument.
On-Load Tap-Changer Tester
The on-load tap-changer is an important moving part connected to the transformer circuit. In the “Power Equipment Handover and Preventive Test Regulations”, it is required to check the action sequence of the on-load tap-changer, measure the switching time, etc.
Based on the above regulations and industry characteristics Push,China’s on-load tap changer tester can accurately measure the transition time, transition waveform, transition resistance, three-phase periodicity and other parameters of the on-load tap changer. It is an ideal tool for testing on-load tap changers.