Home > Product Groups > Power Filters (EMC / RFI) > 

 

Power line Filters

RADIUS POWER offers one of the most extensive range of standard and custom EMI filters and EMC filters. From telecom to ITE to industrial to medical to military to aerospace, RP can provide the right filter solution for all applications requiring EMI filters, AC filters, DC filters, single phase filters, three phase  filters, IEC inlet filters and PEM or power entry module filters.
 
All standard filters are safety approved to the applicable UL, CSA and CE standards which represent one of the most extensive product crosses to major competitors such as Corcom, Schaffner and Delta.

As European distributor, CD Automation UK can satisfy all your filtering requirements, with many products available ex-stock.

Please click on the links below to find our standard product offerings:

 

See our Technical Terms section at the foot of this page for more information on filter terminology. 

 

TECHNICAL REFERENCE

Interference Modes
Common-Mode
Noise conducting out onto the power line in which the noise voltage is referenced between each line and earth.

Differential-Mode
Noise conducting out onto the input power line in which the noise voltage is referenced between the phases or phase and neutral, independent of earth.

Insertion Loss
Insertion loss is a general measure of a filter's performance. Measurements are made using 50ohm source and load impedance's in a static or unloaded condition. insertion loss is not an absolute measure of performance, but is used as a comparison tool or to define a general performance level.

Voltage Ratings
In general, single phase filters are rated for a max voltage of 250VAC at 50/60Hz and 480VAC for three phase filters. Radius Power uses capacitors which conform to the latest IEC 384-14 standard permitting operation above these values by 10% and operation to 400Hz up to 250V max.

Leakage Current
Current into the ground/earth of a system at the line frequency. Directly related to the capacitance to ground in the filter.
Lk = 2*(PI) *F *C *V
F= Line frequency
C= Capacitance
V= L-G voltage


 

Current Ratings
Defined at a given ambient temperature. Single phase filters are generally tested at 40°C and three phase at 50°C.

 

High voltage Testing
Two categories; type and production. Type testing is once for a duration of 60 seconds. 100% Production tests are

carried out for a duration of 1-2 seconds.

 

Climatic Ratings
Radius Power filters are designed for the following climatic classifications: 


25/100/21
25 = -25°C lower temp limit
100 = 100°C upper temp limit
21 = 21 days humidity

 

Component Ratings
Inductance: -30%/+50%
Capacitance.: +/-20%
Resistance: +/-10%

Ambient Temperature
Air temperature surrounding a device.

Filter Temperature Derating
Iamb = IR*(sqrt((100-TD)/(100-TR)))

IR = Rated Current

TD = Desired Ambient Temp

TR = Rated Ambient Temp

 

Breakdown Voltage
Level of voltage causing a break down of a dielectric (e.g. air) resulting in the flow of excessive leakage current.