Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

The No - Load Test serves as an indirect approach for ascertaining the efficiency of three - phase induction motors. It also enables the determination of the circuit parameters of their equivalent circuits. Similarly, the open - circuit test is carried out on transformers. In fact, the no - load test on an induction motor is conceptually equivalent to the open - circuit test on a transformer.During this test, the motor is decoupled from its load. Then, the rated voltage at the rated frequency is

DefinitionConducting a full - load test on a small transformer is quite convenient. However, when it comes to large transformers, this task becomes extremely challenging. The maximum temperature rise in a large transformer is typically determined through a full - load test. This particular test is also known as the back - to - back test, regenerative test, or Sumpner’s test.Finding a suitable load that can absorb the full - load power of a large transformer is not an easy feat. As a result, a si

Important points in engineering studies in high voltage gas insulated switchgear (GIS)Engineering Studies in Gas - insulated Switchgear (GIS)Once the electrical engineer has defined the preliminary configuration of the GIS and determined and specified the primary equipment data, additional studies related to the engineering aspects, as well as the logistics of delivery and installation, must be carried out.The most crucial engineering studies are summarized as follows:1. Transient Recovery Volta

What is Induction Voltage Regulators？Definition: An induction voltage regulator is a kind of electrical machine. Its output voltage can be adjusted, ranging from zero up to a specific maximum value. This range depends on the turn ratio between the primary and secondary windings. The primary winding is linked to the circuit that requires voltage regulation, while the secondary winding is connected in series with the sameTypes of Induction Voltage RegulatorsInduction voltage regulators are primari

The increasing complexity of the power grid, especially with the incorporation of power - electronic - based devices, necessitates traceable measurement techniques. These are crucial for accurately ascertaining the high - frequency components of high electrical currents. In the non - intrusive measurement of both AC and DC electrical currents, magnetic coupling in current transformers is extensively employed.The error of a current transformer is directly related to the magnetization of its core.

What is a Suspension Insulator?Suspension insulators serve to isolate line conductors and provide electrical support for them. They are composed of multiple porcelain insulator units that are interconnected by metal links, forming a flexible string. The conductor is attached to the bottom of this string. A diagram of the suspension insulator is presented as follows.Advantages of Suspension Type InsulatorSuspension type insulators offer several benefits, as detailed below: Voltage Adaptability: E

What is Metal Oxide Surge Arrester？Definition：An arrester that utilizes zinc oxide semiconductor as its resistor material is called a metal oxide surge arrester or ZnO Diverter. This type of arrester offers protection against all kinds of AC and DC over - voltages. It is primarily employed for over - voltage protection at all voltage levels within a power system.Construction & Working of Metal Oxide Surge Arrester：Zinc oxide is an N - type semiconducting material. It is pulverized into a fin

Preventing and controlling SF6 emissions from high - voltage gas - insulated switchgear has long been a formidable challenge.Here, you can find more details about the key points of on - site SF6 gas leakage tests for high - voltage switchgear.Sulphur Hexafluoride (SF6) emissions from electrical equipment have been a major concern in the pursuit of greenhouse gas emission reduction goals. This is because SF6 emissions have a substantial impact on global warming. SF6 has an atmospheric lifetime of

What is a relay?Definition: The relay is the device that open or closes the contacts to cause the operation of the other electric control. It detects the intolerable or undesirable condition with an assigned area and gives the commands to the circuit breaker to disconnect the affected area. Thus protects the system from damage.Working Principle of RelayIt works on the principle of an electromagnetic attraction. When the circuit of the relay senses the fault current, it energises the electromagne

An experiment was carried out to simulate an SF6 gas leak by transferring SF6 gas from one gas bottle to another. The objective of this experiment was to ascertain whether there were any disparities in how each type of transducer tracked an SF6 gas leak. A quartz oscillating density transducer, a pressure and temperature - calculated density transducer, a pressure transducer, and two temperature sensors were used to monitor the controlled leak. The transfer of SF6 gas between the bottles was reg