VLT^® Power Options MCC 102 du/dt filter

The perfect solution for:

• Applications with short motor cables
• Applications with older motors
• Aggressive environments
• Applications with frequent braking
• Motor cable length up to 150 m

Voltage overshoots and voltage peaks
Subject to voltage pulses, voltage peaks occur in the choke every time switching takes place. The higher inductance the higher voltage peaks causing stress situations in the winding insulation of the connected motor.

Owing to the cable impedance, the dU/dt stress – in the case of longer motor cables – is reduced to less problematic values.

Despite the reduced dU/dt owing to the cable impedance, this does not result in any significant stress relief for the motor, since now, the increased voltage amplitudes represent the dominant stress factor.

• Protects the motor against voltage peaks and high du/dt values hence prolongs the lifetime of the motor
• Allows the use of motors which are not specifically designed for converter operation, for example in retrofit applications
• Reduced size, weight and price compared to the sine-wave filters
• Possibility of connecting shielded cables with included decoupling plate
• Compatible with all control principle including flux and WC+
• Parallel filter installation is possible with applications in the high power range