EMC FILTERS
EMC FILTERS
Electromagnetic interference (EMI) is a prevalent issue in electronic equipment, manifesting as either intentional or unwanted emissions. EMI can propagate through conducted interference (150 KHz to 30 MHz) or radiated interference (30 MHz to 300 MHz). Electromagnetic susceptibility (EMS) refers to equipment failure in electromagnetic environments, while electromagnetic compatibility (EMC) is the relationship between interfering and affected equipment.
Conducted interference occurs in common mode (asymmetric) and differential mode (symmetric). Radiated interference happens when equipment acts as an antenna, capturing signals through power supply cables or internal elements.
Power line filters are used to block interference, designed as low-pass filters to attenuate interference frequencies while allowing power line frequencies to pass. The filter's impedance should be unmatched to the interference source to reflect perturbations back.
Filters should cover frequencies from 10 KHz to 300 MHz, with high insertion losses in specified ranges. They must comply with relevant standards and be designed for both symmetric and asymmetric modes.
PREMO offers customizable power line filters with various connection types and accessories, allowing for tailored solutions.
Choosing the right filter and proper installation is crucial. Filters can be mounted externally or internally, with external shielding connected to the equipment chassis. Power and load lines should be short and well-separated.
PREMO filters undergo high voltage, leakage current, and attenuation tests to ensure reliability and safety.
Filters are rated for specific voltages and currents, with dielectric strength and leakage current specifications. They are categorized by climatic conditions and component tolerances.
PREMO offers a wide range of filters for different applications, including single-phase, three-phase, DC, and screened room filters.
Available in various configurations, including chassis panel mounting and high attenuation models, designed for general purpose or specific applications like switching mode power supplies (SMPS).
PREMO has developed a comprehensive range of INVERTER EMC FILTERS, including single-phase and three-phase filters up to 900 Amps and voltages of 250V, 520V, and 720V.
Guidelines include grounding all metallic parts, placing the EMC Filter close to the inverter case, and using shielded cables from the filter to the motor.
Designed for frequency inverters with a maximum operating voltage of 520Vac and an operating frequency of DC - 60Hz.
Designed for photovoltaic inverters and other DC applications, with a maximum operating voltage of 1200 Vdc.
Designed for frequency converters without neutral, offering high attenuation properties and compact size.
Effective in reducing electromagnetic interference from motor cables, particularly in the frequency range of 5 to 20 MHz.
Minimize frequency inverter dV/dT values, increase motor life, and reduce motor heating.
Single Line C-Circuit filters are compact and easy to install, suitable for telecom, military, and industrial applications.
- Maximum Operating Voltage: 250VAC / 400VDC
- Operating Frequency: DC - 60Hz
- Hi-pot Test Voltage: L/N-›PE: 3000Vdc for 2 seconds
- Climatic Category: HPF (40/085/56)
- MTBF: Greater than 0.3 million hours at 40°C, 230VAC
- Flammability Class: UL 94 V0
- Ensure the torque applied to screws does not exceed the maximum level.
- Proper grounding of the filter metal housing to the cabinet panel is essential.
- Separate input and output wires to prevent noise coupling.
- Keep input wires short to minimize radiated interferences.
- Ensure good insulation around connection parts to avoid short circuits.
- Contact PREMO technical support for further information.
Catalog excerpts
Single-Phase Filters, Three-Phase Filters, Three-Phase + Neutral Line Filters, DC Filters, Screened Room Filters (3Ph+N) , Output Ferrites, dV/dt Output Filters , Feedthrough Filters
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INTRODUCTION Electromagnetic Interference Most electronic equipment generates electromagnetic interference,which in some cases may be intentional (a radiofrequency generator) or unwanted (electronic motor speed controller). This interference is mainly propagated in two ways, one via an energy conducting network, and the other through the air. These are called CONDUCTED INTERFERENCE (150 KHz TO 30 MHz) and RADIATED INTERFERENCE (30 MHz to 300 MHz), respectively. Also, electronic equipment can fail when working within an electromagnetic environment. This tendency to fail is very common and is known...
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Filter characteristics The filters should cover the range of frequencies between 10 KHz and 300 MHz, although the range can be different depending on the standard to be applied. They should generate high insertion losses within the specified frequency range. The insertion losses should be defined for both SYMMETRIC and ASYMMETRIC modes. As the filters are normally installed in the power supply line, they should comply with the appropiate standards. Special Line Filters In this catalogue it is possible to select power line filters of one or more stages, with printed circuit connection, spade fasterners,...
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INTRODUCTION General Technical Characteristics - Rated voltage single phase: 250 VAC 50/60 Hz - Rated voltage three phase: 520/760 VAC 50/60 Hz - Rated current: The rated current, INOM is given for an ambient temperature the permissible operating current, IPERM, must be reduced according to the follwing formula: - Dielectric strength test: L-N / PE 1850 VAC 3s L/N 1750 VDC 3s - Leakage current: 250 V 50/60 Hz 0.552 x rated for 115 V 50/60 Hz - Climatic category: HPF/HMF - Component tolerance: L: -30%, +50% C: -20%, +20% R: -10%, +10% - Types of connexion: Z = Faston 6,30 x 0,8 mm X = Cables UL-1015...
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EMC Filter Chart by Application
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RAPID GUIDE S Single phase Filters CHASSIS PANEL MOUNTING Medical Use ForSMPS High Atten. Very High Atten. Metal Box Plastic Box ROOM FILTERS SMPS = Switched Mode Power Supply PCB = Printed Circuit Board Single phase Filters Chassis Panel Mounting with I EC Connector Size reduced With Fuses Voltage Selector High Atten. Earth Choke FI-FM FT-M/FTN-M/FTC-M FTCV-M Name Voltage Current Feedthorught Filters Name Voltage Current Topology P Series 250Vac/400 Vdc (10-63 A) Single Line Pi Circuit C Series 250Vac/400 Vdc (10 - 250 A) Single Line C Circuit
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Chassis Panel Mounting Single Phase Filter (1-30 A) General Purpose Chassis mounting single stage filter for general purpose. Good attenuation over a wide frequency range. Small size. General Specifications Maximum operating voltage: 250Vac. Application class: Electrical schematics Product List CY HOUSING LCURRENT CONNECTION Insertion Loss
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High Attenuation Single Phase Filter (1-20 A) General Purpose Double stage filter. High attenuation. General purpose applications with high EMI levels. General Specifications Maximum operating voltage: 250Vac. Application class: Electrical schematics Product List CY HOUSING LCURRENT CONNECTION
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SMPS Chassis Panel Mounting Single Phase Filter (3-10 A) For equipment using s.m.p.s. Chassis mounting double stage filter. High symmetrical attenuation. Switching mode power supplies. General Specifications Maximum operating voltage: 250Vac. Application class: Electrical schematics Product List CY HOUSING LCURRENT CONNECTION Insertion Loss
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High Attenuation Single Phase Filter (1-20 A) General Purpose Chassis mounting single stage filter. General purpose. Good attenuation in a wide frecuency range. General Specifications Maximum operating voltage: 250Vac. Application class: Electrical schematics Product List HOUSING LCURRENT CONNECTION Insertion Loss
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High Attenuation Single Phase Filter (1.30A) General Purpose Chassis mounting single stage filter. High attenuation for noisy circuits. General Specifications Maximum operating voltage: 250Vac. Application class: Product List Electrical schematics HOUSING LCURRENT CONNECTION Insertion Loss
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High Attenuation Chassis Panel Mounting Single Phase Filter for Frequency Inverters (6-30A)_ Electrical schematics For single phase frecuency inverters Double stage filter. Special performance for single phase frecuency Very high asymmetrical attenuation. Product List General Specifications Maximum operating voltage: 250Vac. Hipot test voltage: L/N->PE: 1800Vac2s. L2 R(O) CX CY HOUSING LCURRENT CONNECTION Insertion Loss ASYM
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Very High Attenuation Chassis Panel Mounting Single Electrical schematics General Specifications Maximum operating voltage: 250Vac. Application class: General Purpose Double stage filter. High insertion loss. General purpose filter. Product List HOUSING LCURRENT CONNECTION Insertion Loss
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Single - Phase Filters FFH Very High Attenuation Chassis Panel Mounting Single Phase Filter (1-16A) Electrical schematics General Specifications General Purpose Double stage filter. Very high attenuation (Symmetrical and asymmetrical). For application with high EMI levels. Insertion Loss Maximum operating voltage: 250Vac. Operating frequency: DC - 60Hz. Hipot test voltage: L/N-›PE: 1800Vac 2s. L-›N: 1700 Vdc 2s. Application class: HPF Acc. TO DIN 40040 (-25ºC/+85ºC/95% RH, 30d). Flammability class: UL 94 V2. AWG18 WIRE FASTON 6,3mm AWG18 WIRE FASTON 6,3mm AWG18 WIRE FASTON 6,3mm AWG18 WIRE FASTON...
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FFHV Single - Phase Filters Very High Attenuation Chassis Panel Mounting Single Phase Filter for Frequency Inverters (6-30A) Electrical schematics General Specifications Maximum operating voltage: 250Vac. Operating frequency: DC - 60Hz Hipot test voltage: L/N-›PE: 1800Vac 2s. L-›N: 1700 Vdc 2s. Application class: HPF Acc. TO DIN 40040 (-25ºC/+85ºC/95% RH, 30d). Flammability class: UL 94 V2. For single phase frequency inverters Double stage filter. Special high performance for single phase frequency inverters. Very high attenuation. Insertion Loss
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