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Motor Protection Filters

Motor Protection Filters
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MTE Corporation Application Note, July 2000, Doc# AN0104, pg 1 of 2 Guard your motors insulation system against stress caused by high voltage peaks and dv/dt often experienced with use of a VFD at long distance from the motor. Selection and Use of the MTE Motor Protection Filter (LC Sine Wave Type) Verify that the sine wave filter is compatible with your application : ҕ VFD switching (carrier) frequency set in range of 5kHz to 20kHz? VFD output frequency 60Hz or less? Օ Ambient temperature 40C or less? Please note that improper connection can cause damage to the components of filter or drive. Capacitor connections must be on the Гmotor side of the reactor. ԕ Altitude 1,000 meters or less? 480V (up to 600HP) or 600V (up to 20HP) supply? If you can answer yes to the questions above, apply the appropriate standard MTE Motor Protection Filter. Select based on motor HP/voltage rating. The connection is shown below. >

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MTE Corporation Application Note, July 2000, Doc# AN010 4 , pg 2 of 2 Selection : The filter model selection is based on the HP and Full Load Amp rating from the motors nameplate. The Motor Protection FilterҒs fundamental current rating must be as close as possible to the motor FLA. The first three digits of the filters catalog number indicate its fundamental current rating. Care should be taken in selection, as significant oversizing or undersizing of the filter may cause damage to the filter components. The Motor Protection Filter design requires that the impedance of the motor load be...

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