What should be considered when selecting and using bushings?

What should be considered when selecting and using bushings? When selecting and using bushings, certain considerations need to be taken into account. Bushings, as current-carrying components of transformers, directly impact the insulation performance of transformers. Here are the key points to be aware of during selection and usage: (1) Ambient Medium Temperature: For oil-immersed transformers, the temperature of the bushings in the oil is related to the temperature rise of the upper oil layer. In the case of self-cooling and forced-air cooling, the temperature rise of the upper oil layer is 55K, thus allowing a temperature rise of 15K for the lower terminal. In the case of strong oil-air cooling, […]

How does the geological environment impact the operation of transformers? The primary consideration is the transformer’s ability to withstand earthquakes. Under normal operating conditions, it is stipulated that the horizontal acceleration of the ground should be less than 0.3g, and the vertical acceleration should be less than 0.15g. When installing transformers in seismically active zones, it can be specified during the ordering process the Richter seismic intensity that the transformer should be able to withstand. Regarding the internal structure of transformers, it has been designed with a focus on secure fixation during transportation and the ability to withstand mechanical stress caused by short-circuit currents. Therefore, the internal components are not

What are the advantages of single-phase transformers? Less material usage: Single-phase transformers require 20% less iron and 10% less copper compared to three-phase transformers of the same capacity. Particularly when using a wound iron core structure, the no-load losses of the transformer can be reduced by more than 15%. This reduction in material usage leads to decreased manufacturing and operational costs, ultimately resulting in optimal life cycle costs. Lower line investment: Implementing a single-phase power supply system in the grid can save 33% to 63% of conductors. Calculated based on economic current density, this can save 42% of conductor weight, and based on mechanical strength, it can reduce conductor consumption

What kind of sealing material should be chosen for oil-immersed transformers? Choosing sealing materials that are compatible with the characteristics of transformers is crucial. Technical conditions related to sealing materials include the working medium, working pressure, and working temperature. The working medium mainly involves transformer oil, air, and water. The working pressure is primarily determined by the steady-state pressure generated inside the transformer during fault conditions and the pressure applied during the sealing test (usually the test pressure of components is higher than that of the transformer body), typically ranging from 0.3 to 0.5 MPa. The working temperature is not determined by the highest temperature during the normal operation of

Definition, Applications, Advantages, and Disadvantages of Split-core Transformers Split-core transformers, also known as split-core current transformers (CTs), are a type of transformer that consists of two separate parts that can be opened and closed for installation around a conductor. These transformers are commonly used in power monitoring and control applications to measure the current flowing through a circuit. In this article, we will explore the definition, applications, advantages, and disadvantages of split-core transformers. Definition: A split-core transformer is a type of transformer that has a core that is split in two halves, which can be opened and closed. One of the halves of the core is wound with a primary

The Difference Between Phase Voltage and Line Voltage In an AC electrical system, voltage is an important factor to consider when designing and implementing electrical equipment. Two commonly used voltage measurements in AC systems are phase voltage and line voltage. Although they may seem similar, there are significant differences between them. Phase voltage refers to the voltage measured across a single phase of an AC system. In a three-phase system, there are three phases, each separated by 120 degrees. The phase voltage is measured between a phase and the neutral wire. It is also known as the phase-to-neutral voltage. The voltage measured for each phase will be the same in

How to Control Transformer Temperature Rise in High-Temperature Environments? —Synergistic Design of Heat-Resistant Insulation Materials and Forced Air Cooling Against the backdrop of global warming and increasing industrial demand, the stable operation of transformers in high-temperature environments has become a major challenge for the power industry. This article delves into a comprehensive solution for controlling transformer temperature rise through the synergistic design of heat-resistant insulation materials and forced air cooling systems. It aims to help users understand the essence of this complex technical issue and the strategies to address it. Content 1. Impact of High-Temperature Environments on Transformers and the Importance of Temperature Rise Control Transformers, as core equipment in

Comparison of the Four Core Partial Discharge Detection Technologies: In-Depth Analysis of Principles, Advantages, and Applications In the field of safety maintenance for high-voltage electrical equipment, Partial Discharge Detection (PD Detection) plays a critical role as an early warning system. As global power grids demand higher reliability for key assets such as transformers and reactors, mastering accurate and efficient PD detection technologies has become an industry consensus. This guide provides a detailed analysis of the four mainstream international detection methods: the Pulse Current Method (IEC 60270 Standard), Ultrasonic Method (Acoustic Emission), Ultra-High Frequency (UHF) Method, and Transient Earth Voltage (TEV) Method, helping you develop a scientific equipment health management strategy.

What should be taken into consideration during the assembly of transformer pressure plates? During the assembly of pressure plates, it is essential to simultaneously and evenly fasten the pressure pins on the pressure plates, and it is not allowed to tighten one side first and then the other. For structures with split pressure plates, ensure that the geometric centers of all windings are on the same horizontal line. Of course, the bolts along the box edge, fixing screws for bushings, and other components should also be uniformly fastened one by one. Contact LuShan, est. 1975, is a Chinese professional manufacturer specializing in power transformers and reactors for 50+ years. Leading

How does coastal environment affect the operation of transformers? In coastal areas, the air contains salt spray, which impacts the creepage of bushings and leads to metal corrosion. To express the required leakage ratio for bushings, an equivalent salt density can be used, and the corresponding values are listed in the leakage ratio. Equivalent salt density refers to the equivalent amount of sodium chloride in the deposited contaminants on the insulation surface of the bushing. Dissolving all the deposited contaminants on the insulation surface of the bushing and the equivalent salt density of sodium chloride in the same volume of distilled water results in substances with the same volume conductivity.