LED display screens, LED lights and other energy-saving devices are single-phase rectifier loads, which will generate high-order harmonic currents. When the current of the phase line reaches the rated load, excessive harmonic current will be generated on the neutral line, and the neutral line current will be twice the phase current.

一、 Product functions and features

1. Effectively filter out harmonic current on the neutral line, reducing the potential electrical fire hazard caused by excessive neutral line current;
2. Can reduce phase line current, achieving energy-saving effect;

3. Reduce the initial investment and no longer need to use large-sized cables;
4. Simple structure, easy installation, stable operation, and reduced electromagnetic interference.
The LED-specific neutral current filter (XHNBF series) produced by Xuhao Electric has been verified by many users for many years and has significant effects, moderate prices, and superior performance. It is an effective product for solving the problem of excessive neutral current caused by LED equipment.

二、Problems with LED displays and lighting

1. There is a problem of excessive zero line current in LED lighting and display screens, with the zero line current reaching about twice the phase line current.
2. The zero line cable of LED equipment screen is severely heated, with high cable noise and obvious electrical fire hazards.
3. The leakage circuit breaker of the superior switch of the LED device has tripped.

三、 The reason why the neutral current of LED equipment is larger than the phase current

LED devices using thyristor switching power supply will generate a large amount of 3rd harmonic zero sequence current, which is superimposed on the zero line. Make the zero line current of the LED display screen greater than the phase line current, about twice.

四、 Product Design Principles

1. Design principle: The LED dedicated zero line current filter (XHNBF series) produced by Xuhao Power uses harmonic characteristics to detect and calculate magnetic fluxes of equal or opposite magnitude inside the device for cancellation, thereby filtering out the third harmonic current.
2. Achieved effect: It can reduce the harmonic current of the LED display screen's zero line by more than 80%, and reduce the zero line current by less than 50%. Ensure safe operation of cables, avoid overheating of cables and wires, and reduce fire hazards.
Reduce electrical energy loss; No need to use large-sized cables anymore, reducing one-time investment.

Model Description：XHNBF  XH-NBF