Electromagnetic interference (EMI), or radio frequency interference (RFI), is a type of electric or electronic emission that can degrade, impair, or prevent electrical circuit performance. EMI filters are used to suppress interference generated by the device, or by other equipment, and to protect a device from electromagnetic interference signals present in the environment. Most EMI filters consist of components that suppress differential and common mode interference.
To protect and optimize equipment, Enerdoor EMI-RFI filters provide solutions in three product categories: single-phase, three-phase, and three-phase plus neutral filters.
Electromagnetic Compatibility (EMC) refers to the ability of equipment or systems to operate in an electromagnetic environment without introducing intolerable electromagnetic interference to anything in the environment. EMC includes two important aspects: emission and immunity.
Emission: The phenomenon by which the electromagnetic energy is emitted from a source such as a device, machine or system and shall not emit undesirable electromagnetic interference of a higher level than those allowed by the European EMC Directive 2014/30/EU (See Figure 1).
Immunity (To Interference): The capability of a machine, equipment or system to correctly operate without degrading functional characteristics when affected by electromagnetic interference.
Many countries have established regulations to minimize the radio-frequency interference between electronic equipment including: the CE mark in Europe, FCC in the United States, CCC in China, VCCI in Japan, RCM in Australia & New Zealand, and KCC in South Korea.
The global guideline for electromagnetic interference is the European Directive 2014/30/EU which requires that manufacturers of industrial machine tools and electric and electronic equipment comply with the electromagnetic compatibility emission and immunity Standards.
General Classification of Interference
Problems generated by EMI-RFI interference
High Frequency Solution
To protect and optimize equipment performance, Enerdoor offers one of the largest ranges of solutions to reduce electromagnetic/radio-frequency interference. Offering a large variance of electrical and mechanical characteristics, Enerdoor EMI/RFI filters cover standard nominal voltage from 0 to 750 Vac with the following nominal currents:
Single-phase EMI/RFI filters: from 1 to 100A
Three-phase EMI/RFI filters: from 3 to 3000A
Three-phase plus neutral EMI-RFI filters: from 3 to 3000A
Parallel EMI/RFI filters: Enerdoor offers a unique parallel EMI filter solution. This line is designed for the specific frequency range of 10 KHz – 6 MHz where there is severe risk of interference and disturbance.