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

Differential Protection of a TransformerTransformers are among the key components in power systems. As static, fully - enclosed, and typically oil - immersed devices, faults on them are relatively infrequent. However, even a rare fault can have severe consequences for a power transformer. Thus, safeguarding power transformers against potential faults is of utmost importance.Faults on transformers are mainly categorized into two types: external faults and internal faults. External faults are swif

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

What is Valve Type Lightning Arrester？DefinitionA lightning arrester that consists of single or multiple gaps connected in series with a current - controlling element is known as a lightning arrester. The gap between the electrodes blocks the flow of current through the arrester, except when the voltage across the gap exceeds the critical gap flashover voltage. The valve - type arrester is also referred to as a gap surge diverter or a silicon carbide surge diverter with a series gap.Construction

Traditionally, the moisture level in SF6 gas - insulated equipments was checked by periodically collecting gas samples. However, in recent years, condition monitoring systems equipped with online instrumentation for measuring the dew point of SF6 have become increasingly prevalent.Nowadays, it is quite common to install dew point sensors in the same sensor block as pressure relays or density sensors. Additionally, these sensor blocks are often not directly attached to the main gas tank. Instead,