Shengzhi Power S20-2000/10-NX2 Power Transformer Obtain National Laboratory Type Test Report
In December 2023, the S20-2000/10-NX2 power transformer produced by Henan Sheng Zhi Rui Nuo Electrical Equipment Co., Ltd. was sent to the national medium and low voltage power distribution equipment quality inspection and testing center, and the national medium and low voltage power distribution equipment quality inspection and testing center was entrusted to carry out type test and testing on the product.
29
2024
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02
Judgment of dry-type transformer fault through the abnormality of various sounds
Dry-type transformer has noise. If the sound of the transformer is larger than normal and there is obvious noise, but the current and voltage are not obviously abnormal, it may be caused by the loosening of the internal clamp or the screw pressing the iron core, which increases the vibration of the silicon steel sheet.
17
2023
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11
Effect of transformer on the performance of short-circuit impedance
When the transformer is running at full load, the short-circuit impedance has a certain influence on the output voltage of the secondary side. The short-circuit impedance is small, the voltage drop is small, the short-circuit impedance is large, and the voltage drop is large. When the transformer load is short-circuited, the short-circuit impedance is small, the short-circuit current is large, and the electric force of the transformer is large. The short-circuit impedance is large, the short-circuit current is small, and the electric force borne by the transformer is small.
17
2023
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11
How to Reduce the Electromagnetic Interference of Transformer to Amplifier
The power transformer can interfere with the amplifier through the magnetic field, electromagnetic induction and circuit, and is the largest source of interference in the audio machine. Therefore, it is necessary to deal with its working state and application environment, in order to effectively avoid the interference generated by the power transformer, so that the amplifier can get excellent sound effects. I will discuss this with you below.
17
2023
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11
How to judge the transformer accident detection and measures
Abnormal sound inside the transformer. The abnormal sound inside the transformer may be due to the following reasons: severe overload causes heavy "buzzing" sound inside the transformer; Due to poor contact or breakdown points inside, "squeaking" or "crackling" discharge sound occurs inside the transformer; Due to the looseness of some parts of the connecting shaft bolt of the transformer top cover and the fact that the transformer core is not clamped, the silicon steel sheet vibrates and will emit strong noise; when there is a grounding or short-circuit fault in the power grid, a large current flows in the winding, which will emit strong noise. When the transformer is connected with large power equipment or equipment that can generate harmonic current, the operation of the equipment may cause the transformer to make a "wah-wah" sound. Due to the resonance of the iron core, the transformer will have rough and thin noise. Excessive primary voltage and excessive current of the transformer will cause abnormal sound; due to overvoltage, winding or lead wire discharge to the shell, or iron core grounding wire disconnection, resulting in iron core discharge to the shell, all make the transformer discharge sound.
17
2023
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11