Surge Protector For Low Voltage Complete Equipment Incoming Line And Compensation Cabinet

Surge protector for incoming line and compensation cabinet of low-voltage complete equipment. In the power supply of life, the electricity we need is usually distributed centrally by low-voltage complete equipment. Low-voltage complete equipment is usually divided into electric cabinets with different functions. Today, I will talk to you about how to select surge protection device for incoming line cabinets and compensation cabinets of low-voltage complete equipment.

surge protective device for incoming line and compensation cabinet of low-voltage complete equipment. Low-voltage complete equipment is a link behind the transformer in the power supply line. It can concentrate and redistribute the low voltage obtained from the low-voltage side of the transformer. The incoming line cabinet is usually connected to the low-voltage side of the transformer. It is the interface for low-voltage complete equipment to receive voltage. The function of the compensation cabinet is to improve the energy waste caused by the low power factor of the power grid. It can improve the voltage quality, reduce line loss, and improve the quality of equipment power. After understanding the use of incoming line and compensation cabinets in low-voltage complete equipment and common installation locations,

According to the lightning protection zoning method mentioned in the IEC62305 standard, the location of the low-voltage complete equipment incoming line and compensation cabinet belongs to the junction of LPZ0B and LPZ1, so a primary surge protector needs to be installed.

When selecting a primary surge protector for the incoming line and compensation cabinet of low-voltage complete equipment, the current discharge capacity is required first. The national standard requires 12.5KA (10/350), but in actual use, we have to choose a 20KA or 25KA T1-level SPD with a larger discharge capacity to deal with extreme conditions; considering the impact on subsequent lines, we need to pay attention to the Up value and its energy coordination function in the parameters of the surge protector of the incoming cabinet and compensation cabinet to avoid lightning protection failure due to installation distance restrictions; in addition, when selecting, we should also choose a Uc value that matches the system, which is related to the service life of the surge protector, so it must be completely matched with the system voltage.