The design standards of Beijing Keantong Electronic Technology Co., Ltd. are based on CCITT international standards, 005ITT 15101-84, 08.03, "Test Specifications for Filters, Networks and delay Lines" and UL1283 "Electromagnetic Interference Filters". The power filter is a passive low-pass filter, the filter frequency band is between 10KhZ-30mhz, which can effectively suppress the conducted interference transmitted along the power line, and also greatly reduce the radiation interference generated by electronic equipment.

The company's power filter can be customized according to user requirements.

Detailed description

Leakage current

Refers to the EMI filter is connected to the rated voltage, the filter ground terminal to any end of the power supply current, the test principle diagram is as follows:

Note: The leakage current of the DC power filter is not required.

Insertion loss

The insertion loss of the filter is the ratio of the noise voltage transferred from the noise source to the noise load without the filter to the noise voltage on the load when the filter is inserted. The insertion loss is tested under no-load, 50Ω system conditions, and the result is usually expressed as a attenuation curve (in dB) in the frequency band of interest. Insertion loss can be calculated by the following formula:

IL=201g(V1 / V2) (dB)

Where: V1- Noise voltage on the load without filter; V2- Insert the noise voltage on the filter load.

The measurement results of filter insertion loss are usually expressed in two forms: one is the curve of insertion loss against frequency, and the other is a data table. The test circuit schematic diagram of common-mode and differential mode insertion loss is shown below

共模

差模

Note: The performance of the power filter is measured according to the UL1283 standard under the ideal state of 50Ω-50Ω, and the effect under the actual environment shall prevail.

Insulation resistance

Edge resistance refers to the resistance between the filter phase line and the middle line to the ground. It is usually tested with an insulation resistance meter. The insulation resistance of the AC power filter is greater than 200MΩ/500VDC, and the DC power filter is greater than 60MΩ/60VDC.

Applicable occasion

Switching power supplies, UPS and other power electronic equipment, general electronic equipment, commercial terminals, power monitoring, computers, metering equipment, etc.

Product characteristics：

 Has good common mode and differential mode filtering performance, can effectively suppress line-ground, line-line electromagnetic interference

 Excellent high frequency interference suppression performance, can make up for the high frequency performance of the printed plate filter circuit

 Low leakage current, high quality components to ensure product safety performance

 A variety of shape specifications are available