Harmonics Mitigation

Motor Protection Filtering www.mtecorp.com/motor.html

dV/dT Series A Filters

• designed for use with inverters operated at switching frequencies between 900 Hz and 8 kHz
• protect AC motors from the destructive effects of peak voltages
• meets voltage specification with up to 1,000 feet of cable, excellent performance up to 3,000 feet
• submersible pumps, HVAC equipment and process automation lines.

Sine Wave 2-8kHz Series A Filters

• designed for PWM inverters with switching frequencies from 2 kHz to 8 kHz
• eliminate the problem of motor insulation failures and reduce electromagnetic interference
• for distances between the motor and the inverter up to 15,000 feet
• submersible pumps, low voltage drives feeding MV motors, HVAC equipment, wind turbines

Motor Protection (LC) Filters 5kHz Sine Wave Filters

• designed for use where the inverter switching frequency is set at 5 kHz or greater
• designed to convert a PWM inverter output wave form to a sinusoidal wave form
• eliminate the issues of motor heating, switching noise, terminal over voltage and damaging dv/dt
• designed to meet motor current requirements based on NEC motor current ratings