Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
The simple EMC/RFI explanation Drives Division 2004-11-08/ updated 2005-02-03 FFJ/DKDD-SMM Confidential / Property of Danfoss Drives A/S 1 EN61800-3 ? Drives Division 2004-11-08/ updated 2005-01-03 FFJ/DKDD-SMM Confidential / Property of Danfoss Drives A/S 2 EMC / RFI definitions Conducted emission Product Standard EN61800-3/A11 First environment Domestic Areas Unrestricted Sales EN55011 Class B Second environment Industry Areas Restricted Sales EN55011 Class A1 Unrestricted Sales EN55011 Class A2 Restricted Sales Exceeds limits EN55011 Class A2 Due to technical reasons in some applications. Drives Division 2004-11-08/ updated 2005-01-03 FFJ/DKDD-SMM Click in the boxes, to get more information Confidential / Property of Danfoss Drives A/S 3 First Environment The first environment is classified as domestic/residential areas. That means where the costumers are connected directly to the public low voltage mains. Examples: Houses, apartments, commercial premises or offices in residential buildings Drives Division 2004-11-08/ updated 2005-01-03 FFJ/DKDD-SMM Confidential / Property of Danfoss Drives A/S 4 Second Environment The second environment is classified as industry area. That means where the costumers has their own transformer substation. Examples: Industrial areas, technical areas of any building fed from a dedicated transformers Drives Division 2004-11-08/ updated 2005-01-03 FFJ/DKDD-SMM Confidential / Property of Danfoss Drives A/S 5 Unrestricted Sales (first environment) Sales to customers where the manufacturer/seller estimates that sales is not depending on the customer’s/user’s EMC-knowledge to the products and there installation. The units are installed and used by layman. An example of this is sales via electric shops, machine shops, rental companies, etc. If the products are sold in this way, the supplier is responsible for the EMC compliance. go to the limits click here Drives Division 2004-11-08/ updated 2005-01-03 FFJ/DKDD-SMM Confidential / Property of Danfoss Drives A/S 6 Unrestricted Sales (second environment) Sales to customers where the manufacturer/supplier estimates that the customers, i.e. installation companies or end-users, individually or altogether, have the technical competence to use and install the products according the EMC requirements for the application. The units are installed and used by professional users. An example of this is that the products are considered part of a large system, and the system is to be EMC-approved. If the products are sold in this way, the supplier must provide a guide for installation and use. The user/installer has the primary EMC responsibility and shall follow the guidelines of the supplier. go to the limits click here Drives Division 2004-11-08/ updated 2005-01-03 FFJ/DKDD-SMM Confidential / Property of Danfoss Drives A/S 7 Restricted Sales (first environment) Sales to customers where the manufacturer/seller estimates that the customers, i.e. wholesalers, installation companies or end-users, individually or altogether, have the technical competence to use and install the products according to the EMC requirements for the application. The units are installed and used by professional users. An example of this is that the products are considered part of a large system, and the system is to be EMC-approved. If the products are sold in this way, it is the customer's responsibility to make sure that the system as a whole complies with the EMC requirements. go to the limits click here Drives Division 2004-11-08/ updated 2005-01-03 FFJ/DKDD-SMM Confidential / Property of Danfoss Drives A/S 8 Restricted Sales (second environment) Sales to customers where the manufacturer/seller estimates that the customers, i.e. wholesalers, installation companies or end-users, individually or altogether, have the technical competence to use and install the products according to the EMC requirements for the application. The units are installed and used by professional users. Generally the limits for unrestricted sales shall be met. Due technical reasons there are some applications where it is not possible for the drives to comply with these limits. These applications are as follows: IT-networks in complex systems – current above 400A – Voltage above 1000V and where required dynamic performances will be limited because of filtering. If the drives are sold in this way, users and manufactures must agree on an EMC/RFI plan to meet the EMC requirements of the intended application. •The user must define the EMC characteristics of the environment incl. the whole installation and the neighbourhood. •The manufacture shall provide information on typical emission levels of the drive which is to be installed. Drives Division 2004-11-08/ updated 2005-01-03 FFJ/DKDD-SMM Confidential / Property of Danfoss Drives A/S 9 Limits of EN55011 cl. B, A1 and A2 Average dBµV 130 120 110 2nd. Environment Unrestricted Distribution Above 100Amp 100 90 80 70 2nd. Environment Unrestricted Distribution 60 Up to 100Amp EN55011 cl. A1 1st. Environment Restricted Distribution 50 40 EN55011 cl. B 1st. Environment Unrestricted Distribution 30 20 10 0 0.15 1.0 10.0 2004-11-08/ updated 2005-01-03 FFJ/DKDD-SMM Confidential / Property of Danfoss Drives A/S 30.0 MHz Drives Division 10