AC motor filters increase service life

AC motor filters increase service life

Filters from Schaffner, protect AC motors from destructive effects of peak voltages and inrush amps, increasing service life and system reliability, says the company.

The FN5060 dv/dt devices feature patented technology protects motors and adjacent equipment without capacitors or resistors, making them simple to install. They reduce high output dv/dt from IGBT motor drives and eliminate over-voltages caused by line reflections on motor cables, per IEC 60034-17/25.

Typical dv/dt reduction is a factor of 8 to 12. These filters are ideal for loads up to 760 VAC, 30 to 1200A and motors up to 60 Hz.

They suit moto drives with short to medium cable lengths, servo or torque motors, submersible or irrigation pumps, HVAC equipment including pumps, fans and compressors, elevators, hoists and cranes, process equipment and applications where sine wave filters are not suited (such as high dynamic operations).

Compact, resistor-less design saves floor mounting space and installs easily, says the company. They are for applications with frequent braking, danger of flash-over voltage, and motors running at high temperatures.

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