Danh mục: Technique

What Are the Best Voltage Withstand Test Methods for Power Cables?

This article mainly discusses the test methods of oil-impregnated paper-insulated cables, plastic-insulated cables and cross-linked polyethylene cables, and the common electrical tests include DC withstand voltage and leakage current tests, VLF withstand voltage tests, Power frequency AC resonance withstand voltage testing , partial discharge tests and so on.

What is rated power frequency withstand voltage?

Rated frequency withstand voltage is the maximum voltage that electrical equipment or its insulation system can safely handle during normal operation at the rated frequency (such as 50Hz or 60Hz). Under this voltage, the equipment can operate normally without experiencing insulation breakdown or other failures.

What is the difference between transformer “Type testing”and “Factory acceptance testing”(FAT)?

we will analyze the differences between transformer type testing and transformer factory acceptance testing in terms of standard basis, test items, parameter requirements, and criteria for passing judgment. This analysis aims to provide valuable references and guidelines for the design, manufacture, acceptance, operation, and maintenance of transformers.

What is battery charger discharger ?

A battery charger discharger is an advanced piece of equipment designed to perform two critical tasks: charging a battery to its full capacity and discharging it to measure performance, capacity, and other key parameters. These systems are commonly used for testing and maintaining batteries in various applications, ensuring their optimal operation and longevity.

How Battery Test Equipment Supports the Power Systems

Battery test equipment is essential for maintaining the reliability and performance of batteries in backup power systems. These tools play a crucial role in ensuring that batteries function as expected during critical moments and remain in optimal condition throughout their lifecycle.

BDV test of transformer oil

The dielectric strength test for transformer insulating oil is an electrical performance evaluation defined as the measurement of the maximum voltage that the oil can withstand between two electrodes under specified test conditions before electrical breakdown occurs

How do we conduct an insulation test on a transformer?

Transformers are essential in power systems due to their ability to regulate voltage, ensuring efficient transmission over long distances while minimizing energy loss. They provide crucial isolation, protecting sensitive electrical equipment from surges and faults. Additionally, transformers facilitate effective load management, balancing electricity distribution across different phases. As renewable energy sources become more prevalent, transformers […]

What is battery discharge tester ?

A battery converts chemical energy into electrical energy by creating a potential difference between two electrodes (anode and cathode) through a chemical reaction.

When a battery is discharged, electrons flow from the anode to the cathode while ions in the electrolyte move to maintain charge balance; when it is charged, the process is reversed.

What is  SFRA test?

Sweep Frequency Response Analysis (SFRA) test is an important measurement method used to assess the mechanical and electrical integrity of power transformers. It tests the mechanical integrity of transformer cores, windings, and press frames by measuring the voltage transfer function over a wide frequency range. Each electrical network has a unique frequency response called a frequency response fingerprint.

How to analyse transformer oil ?

There are some tests for insulation oil testing include Breakdown voltage (BDV)test, water content test, acidity test, Dielectric Dissipation Factor test, Interfacial Tension test, Flash Point test, Viscosity test, Relative Density Test, Furan Analysis , Dissolved Gas Analysis (DGA)ect.