- 您现在的位置：买卖IC网 > PDF目录17996 > F1770AA20 (Curtis Industries)FILTER HI PERFORM 20A FASTON PDF资料下载
参数资料
| 型号： | F1770AA20 |
| 厂商： | Curtis Industries |
| 文件页数： | 88/92页 |
| 文件大小： | 0K |
| 描述： | FILTER HI PERFORM 20A FASTON |
| 标准包装： | 10 |
| 系列： | F1770 |
| 滤波器类型： | 电源线 |
| 电压 - 额定： | 250V |
| 电流： | 20A |
| 安装类型： | 底座安装 |
| 端接类型： | 快速连接 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页当前第88页第89页第90页第91页第92页
Technical Considerations
Meeting Emissions Standards
The emissions limits that a piece of equipment must
meet will depend on the intended market for that piece
of equipment. If there is more than one market, more
than one emission standard may have to be met. This
can have a substantial effect on the circuit, size, and cost
of a filter. Standards like the CISPR’s or the FCC Rules
Part 15 have frequency limits of 150 kHz to 30 MHz.
FCC 15 AND CISPR CONDUCTED EMISSION LIMITS
DIGITAL EQUIPMENT
(Line Impedance Stabilization Network) and using
signal generators to inject RF of varying amplitude and
frequency, some insight can be gained as to the nature
of the problem. However, the criteria for acceptable
performance will have to be decided upon so that a
filter yielding this level of performance can be obtained
from the test procedure. Unfortunately, this still does not
eliminate the need for final testing in the actual operating
environment which, in many cases, occurs in the field.
Selection of a suitable filter can best be based on
the type of power supply or input impedance of the
equipment and on the mode of the offending RFI noise.
80 –
78 –
Quasi-peak
Noise Modes
dBμV
76 –
74 –
72 –
70 –
68 –
66 –
64 –
62 –
60 –
58 –
Average
Quasi-peak
Class A Industrial
Class A Industrial
Class B
Residential
Power line filters attenuate noise in two different modes.
Common Mode: Also known as line-to-ground noise
measured between the power line and ground
potential.
Differential Mode: Also known as line-to-line noise
measured between the lines of power.
Power line filters are designed to attenuate either
one or both modes of noise. The need for one design
over another will depend on the magnitude of each
56 –
noise type present. The attenuation is measured in dB
54 –
52 –
50 –
48 –
46 –
Average
Class B
Residential
(decibels) at various frequencies of signal.
Circuit Con ? guration
Power line RFI filters are generally built with two or
0,15
0,5
Frequency (MHz)
5
30
three-pole filter networks. As the number of poles and
the corresponding component count increases, the
EMI measurements are generally made using
Spectrum Analyzers with Average or Quasi-Peak
detectors in accordance with methods described
in CISPR 16. Quasi-Peak differs from Average
measurements by weight-averaging the peaks into
the total.
Equipment meeting these specifications can
utilize a filter with a fairly high cutoff frequency. Other
standards like FCC 18 with a low frequency limit of 10
kHz will result in the equipment using lower cutoff filters.
As might be expected, the lower the cutoff frequency,
the larger the physical size and the higher the cost of
the filter.
Conducted RFI Susceptibility
The problem of susceptibility can be extremely difficult
to deal with because the amplitude and frequency of
the offending RF noise are seldom known and are often
intermittent. If the malfunction can be duplicated by
isolating the equipment from the power line with LISN’s
cost will increase also. Trying to typify an equipment’s
impedance as either high or low for purposes of filter
selection may not be successful. If it is a complex
impedance, it could probably be low at some
frequencies, high at others, and some intermediate
value at still other frequencies.
Although we have been generally successful in
recommending a two-pole network for linear power
supplies and three-pole networks for switching power
supplies and synchronous motors, you should not limit
your testing to just one circuit type if either additional
circuit performance or lower cost is desired. Consider
the following: If the equipment looked strictly capacitive,
the performance of a two-pole network would be
reduced to that of a single-pole filter.
Figure 1a.
A signal source (E) with
its internal impedance
driving a capacitive load.
86
www.curtisind.com
Curtis Industries
A Division of Powers Holdings, Inc.
相关PDF资料 |
PDF描述 |
|---|---|
| WT127M3D1V30B | SWITCH TOGGLE SPDT .5VA WSHBL |
| HSM536-20.0000 | OSCILLATOR 20MHZ HCMOS SMD |
| CD19FD751JO3 | CAP MICA 750PF 500V 5% RADIAL |
| CD19FD621JO3 | CAP MICA 620PF 500V 5% RADIAL |
| FCN2416H124J-D1 | CAP FILM 0.12UF 50VDC 2416 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| F1770DD20 | 功能描述:FILTER HI PERFORM 20A SCREW RoHS:是 类别:滤波器 >> 线路滤波器 系列:F1770 RoHS指令信息:RoHS Material 标准包装:1 系列:RSEN 滤波器类型:电源线 电压 - 额定:250V 电流:150A 电感:- 安装类型:底座安装 端接类型:端接块 其它名称:RSEN2150 |
| F1772-2000 | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:AC-Capacitors, Suppression Capacitors |
| F1772-2000_08 | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:AC-Capacitors, Suppression Capacitors Class X2 AC 275 V (MKT) |
| F1772-2200 | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:AC-Capacitors, Suppression Capacitors Class X2 AC 275 V (MKT) |
| F1772-3000 | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:AC-Capacitors, Suppression Capacitors Class X2 AC 300 V (MKT) |
发布紧急采购，3分钟左右您将得到回复。