1. Application band/应用频段

 

HFD can play a complementary role in the high frequency part of the active power filter. According to the principle of the three order passive filter, the high frequency filter can be treated as low impedance in the 2kHz~30MHz band, so as to absorb a part of the high frequency harmonics, which can achieve the filtering function of the high frequency harmonics.

对有源滤波器不能滤除的高频部分能起到补充的作用，根据三阶无源滤波原理，使高频滤波在 2kHz~30MHz 频段上呈低阻抗特性，从而吸收一部分高频谐波，达到高频谐波的滤波功能。

 

2.Surge protection/ 浪涌保护

 

Surge protection device with the function of class III surge protector, its flow capacity can reach 15kA (8/20us), which can effectively prevent the damage to the equipment from lightning surge.

装有浪涌保护装置，具有Ⅲ级浪涌保护器的功能，通流容量达到 15kA(8/20us)，能有效地防止雷击浪涌对设备的破坏。

 

3. Real-time monitoring/实时监控

 

It has the function of measuring and displaying the total harmonic content and the effective value of the three-phase voltage. When the harmonic content exceeds a certain value, it will send out a flashing and beep alarm.

具备测量和显示三相电压总谐波含量以及有效值的功能，当谐波含量超过一定值时，会发出闪烁和蜂鸣报警。

 

4. High reliability/高可靠性

 

No independent power supply is needed, which can achieve a compact structure. Use guide railfor installation.It is durable, safe and reliable.

无需独立电源，结构小巧，导轨安装。经久耐用，安全可靠。