Abnormal Operating Condition and Causes of Induction Motors
05/19/2025
Abnormal Supply Conditions
Internal Motor Faults
Topics
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Fault Analysis and Treatment of Oil-Immersed Transformers
Oil Leakage at Welded JointsOil leakage at welded joints primarily stems from poor welding quality, such as incomplete or detached welds, and defects like pinholes and gas pores. Although oil-immersed transformers are initially coated with solder and paint during manufacturing, potentially masking these issues temporarily, the defects tend to surface during operation. Additionally, electromagnetic vibration can cause weld cracks, leading to oil leakage.To resolve such leaks, the first critical s
08/29/2025
Transformer Connection Sections
Transformer Connection DesignationsThe transformer connection designation indicates the winding connection method and the phase relationship between the line voltages of the primary and secondary windings. It consists of two parts: letters and a number. The letters on the left denote the connection configurations of the high-voltage and low-voltage windings, while the number on the right is an integer from 0 to 11.This number represents the phase shift of the low-voltage winding's line voltage r
08/15/2025
Functions of power transformers
The power transformer is a key component in power plants and substations. Its functions are diverse: it can step up voltage to transmit electrical energy over long distances to load centers, as well as step down voltage to various required levels to meet different power demands. In short, both voltage step-up and step-down processes are accomplished through transformers.In power system transmission, voltage and power losses are inevitable. When transmitting a constant amount of power, voltage dr
08/08/2025
Why Should a Transformer Core be Grounded?
During transformer operation, the core and the metallic structures and components that secure the core and windings are exposed to a strong electric field, inducing a high potential relative to ground. If the core is left ungrounded, a potential difference can develop between the core and grounded parts such as clamps and the tank, leading to intermittent discharges. Additionally, the magnetic field surrounding the windings induces varying electromotive forces (EMF) in different metallic compone
08/07/2025
