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16 03,2024
What is the rearrangement of parallel conductors?
What is the rearrangement of parallel conductors?After the passage of current through conductors, in addition to resistive losses, there is also eddy current loss. Regarding resistive losses, whether the winding is made with a single conductor or multiple...
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15 03,2024
What role does the winding play in a transformer? And how is the winding classified?
What role does the winding play in a transformer? And how is the winding classified?The winding refers to the constituent part of the transformer circuit, made of copper or aluminum conductors with high electrical conductivity. Its design requires suffici...
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14 03,2024
Why does excitation inrush current occur when a transformer is energized with no load?
Why does excitation inrush current occur when a transformer is energized with no load?When a transformer is energized with no load, the excitation current immediately undergoes a transient phase, and its peak value may exceed several times the rated load ...
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13 03,2024
Why is it necessary to ground the transformer core? And why is it not advisable to use a multi-point grounding approach?
Why is it necessary to ground the transformer core? And why is it not advisable to use a multi-point grounding approach?The core and its metal components generate different potentials due to their positions in the electric field. When the potential differ...
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12 03,2024
How to choose the magnetic flux density in the core of transformer-class products?
How to choose the magnetic flux density in the core of transformer-class products?When selecting the magnetic flux density in the core, several considerations need to be taken into account. 1. Material of electrical steel sheets: If the magnetic ...
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11 03,2024
What are the reasons for the occurrence of partial discharge in transformers?
What are the reasons for the occurrence of partial discharge in transformers?Generally speaking, there are two main reasons for the generation of partial discharge. Firstly, it may result from an unreasonable structural design, leading to uneven distribut...
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10 03,2024
What are the methods for isolating metal fines?
What are the methods for isolating metal fines?a. Install embedded plastic throat rings. Add a throat ring at the pump casing of the impeller, which can be made of polytetrafluoroethylene (PTFE) or produced using epoxy glass fiber rods. This alteration ch...
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08 03,2024
How is the impulse voltage test conducted for transformers?
How is the impulse voltage test conducted for transformers?The impulse voltage test comprises lightning impulse tests (including full-wave and chopped-wave tests) and operating wave impulse tests. In the latest IEC76-3 standard, for transformers with a ra...
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07 03,2024
How is the Induced Voltage Withstand Test for Transformers conducted?
How is the Induced Voltage Withstand Test for Transformers conducted?The Induced Voltage Withstand Test for fully insulated transformers is conducted by opening the high-voltage winding and applying twice the rated voltage at a frequency of 100-250Hz to t...
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05 03,2024
How should an overloaded transformer in operation be handled?
How should an overloaded transformer in operation be handled?When an operating transformer experiences overload, it may manifest as the current exceeding the steady-state value, signaling, and alarm bells sounding, among other indicators. Operators should...
