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What to do if the neutral line current is too high due to LED, billboards, and large-sized LED screens?

Time：

2019-01-05

LED energy-saving lamps, billboards, and large-sized LED screens cause transformer noise to reach up to 65dB, cable temperature to reach 83°C, and neutral line current to be 368.

User: Lecong Yinfeng Furniture City
Name: Zero Sequence Filter
Model: ZSFGD-150/0.4
Load: LED energy-saving lamps, billboards, large-size LED screens
Before filtering:
1. TransformerHigh noise: up to 65dB
2.High cable temperature, fire hazard: 83℃
3.Large neutral current: 368A(Phase line 260A, basically balanced)
4. Neutral current:More than 90% is the third harmonic.
After filtering:
1. Abnormal noise disappears:Reduced from 62dB to 45dB;
2.Neutral cable temperature decreases:Reduced from 83℃ to 47℃;
3.Neutral current decreases: from368A to 129A;
4. ABC current reduction: Phase A reduced from 261A to 228A
5. Significant energy-saving effect: reduced loss by 6kW.
 
GoodPower
       Improving energy efficiency and enhancing power quality is what Guangda has always been committed to providing as an optimization solution for power systems. We have a professional team that can provide customized solutions based on the specific needs of customers, bringing more stable and high-quality power support for customers' production and operations. If you have related questions, feel free to contact us at any time.
 

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