What is a Schaffner filter?

The Schaffner Group is a global leader in solutions that ensure the efficient and reliable operation of power electronic systems by shaping electrical power. The company’s portfolio includes EMC filters, power magnetic components, power quality filters and the related services.

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What is a EMC filter?

EMC (Electromagnetic Compatibility) filters are used to ensure that electrical and electronic equipment does not generate, or is not affected by, electromagnetic disturbance.

What is EMC filter in VFD?

EMC filters reduce the transfer of electromagnetic noise between the drive and mains power supply. All Optidrives are fitted as standard with an internal EMC filter, except where specified by the customer, and for most industrial applications, this will be sufficient.

What is EMI EMC filter?

EMI Filters, or electromagnetic interference filters, also called RFI Filters or radio-frequency interference filters, are an electrical device / circuit that mitigate the high frequency Electromagnetic noise present on the power and signal lines.

When should we use EMI filter?

Most electronics contains an EMI filter, either as a separate device, or embedded in circuit boards. Its function is to reduce high frequency electronic noise that may cause interference with other devices.

How do you wire an EMI filter?

Filter Connection

Route all conductors as close to the panel as possible.
Physically separate the filter input and output conductors.
Keep drive input and output leads separated.
Always keep power and control wiring separated.
Use shielded wiring where possible.
Use single point grounding (connect system ground to filter)

Why do VFD cause harmonics?

The voltage harmonics generated by VFDs are due to the flat-topping effect caused by a weak ac source charging the dc bus capacitor without any intervening impedance. The distorted voltage waveform gives rise to voltage harmonics, which is of more importance than current harmonics.

Why EMI filter is used?

What does an EMI filter do? When attached to devices or circuits, EMI filters can suppress electromagnetic noise transmitted through conduction. These filters extract any unwanted current conducted through wiring or cables, while allowing desirable currents to flow freely.

Why do we use choke in VFD?

To protect thyristor form high transient current, because an inductance does not allow sudden change in current. All the semiconductors are having some tolerance to stand high transient current but beyond the limit which leads to semiconductor failure.

What is the difference between EMC and EMI?

The difference between EMI and EMC is that EMI is the term for radiation and EMC merely is the ability for a system to operate within the presence of radiation.

Do I need EMI filter?

One important reason designers need EMI filters is that regulatory agency requirements for RF/wireless devices for use in the USA (FCC), Canada (IC), Europe (CE), and many other countries dictate that radiated and conducted emissions be constrained below specified limits and must pass immunity/transient requirements.

What is the difference between EMI and EMC filter?

What is Schaffner’s Design Guide to EMC for industrial applications?

Schaffner’s guide to EMC for industrial applications Practical approach to EMC for machine builders Introduction into LCL filters for AIC/AFE/VFD Requirements for Active Infeed Converters. How to choose and install the right filter. Schaffner’s Design Guide of EMC Filters with Common Mode Chokes

Who is Schaffner group?

What are EMC filters?

Single-phase EMC Filter for Control Equipment EMC/EMI Products » Single-Phase Filters » Two-Stage Filters Filter for the control line of complex equipment and machinery To ensure interference-free operation of control equipment (PLC, Motion-, Robot Control etc.)

What is the rated current of the Schaffner inlet filter?

No accidental disconnection Rated current up to 10 A (C13 plug), up to 15 A (C13P plug), and up to 16 A (C19 plug) Fits any Schaffner IEC C14/C20 inlet filter