At present, the relevant standards related to EMI testing are mainly: European regulations (EN55022), US regulations (FCC)
Related nouns:
Unintented radiation (UnintenTIonal): The product produces unwanted electromagnetic radiation that causes interference; such as: computers, LCDMonitor, DVD, television, projectors, etc.;
IntentTIonal: communication using radio waves;
FCC only tests EMI:
RE (radiation interference): test frequency range 30MHZ~1GHZ;
CE (power supply interference): test frequency range 150KHZ~30MHZ;
Main EMI test reference standards:
EU: EN55022 (EMI reference test standard); EN55024 (EMS reference test standard);
United States: FCC Part 15B (EMI Reference Test Standard);
Taiwan: CNS 13438 (EMI Reference Test Standard)
Second, the test
EMI test definition: Test the radiated interference intensity generated by the EUT of the test object, which is divided into two types: RE test and CE test.
1), RE test: Measure the radiation interference generated by the EUT, the test frequency range: 30MHZ~1GHZ.
Test method: refer to the relevant test standard EN55022 or other test standards;
Test distance and occasion: 10 meters measurement, in open occasions;
Test method: Measure the electromagnetic wave radiation generated by the EUT (30MHZ~1GHZ).
2), CE test: measuring the conducted radiation interference generated by the EUT, its test frequency range: 150K ~ 30MHZ.
Test method: refer to the relevant test standard EN55022 or other test standards;
Test Method 1: Measuring electromagnetic wave noise appears on the DA and AC movie ends of the EUT (150K~30MHZ);
Test method 2: Measure the radiation interference value (150K~30MHZ) appearing at the telecom port end.
Note: Because the RE test is an open test occasion, it is susceptible to interference from airborne FM (88MHZ~108MHZ) and mobile phone (900MHZ) noise;
Third, the test requirements
Detecting the radiation interference value by testing the EUT
1), FCC test requirements:
2), EN55022 test requirements:
a), conducted interference test standard
b) Common mode interference test standards:
c) Radiation interference test standards:
DSD Composite offers wildly range of Ladder Type Cable Trays made of FRP (Fiberglass Reinforced Plastic). These FRP Cable Trays are used for installation of power cables and control cables. It is manufactured using highest quality of FRP pultruded material, which is extremely durable and resistant to various chemicals environments.
Ladder Type FRP cable trays are suitable for the laying of larger diameter cables, this type of FRP cable trays has the characteristics of lightweight, low cost, heat dissipation, good air permeability.
FRP Cable Tray,frp tray,channel cable tray,grp cable tray,frp ladder tray
Hebei Dingshengda Composite Material Co., Ltd. , https://www.dsdfrp.com