Motor Protection Products

The output voltage and current waveforms produced by PWM drives place stresses on motor insulation systems. PWM waveforms contribute to increased thermal, vibration and dielectric stresses. TCI products protect your motor from voltage spikes and overheating. 

MotorGuard Sine Wave Filter (KMG with PQconnect)
kmg with pqconnect

KMG with PQconnect sine wave filter converts the PWM wave form to a near sinusoidal wave form by eliminating the carrier frequency. PQconnect connectivity detects thermal switch alerts, monitors the filter performance, and verifies voltage distortion is at a recommended level.

MotorShield Sine Wave filter (MSN)
msd

TCI’s MotorShield (MSD) sine wave filters are used on the output of a VFD/drive to filter the PWM carrier frequency converting it into a clean voltage waveform. The MSD is suitable for carrier frequencies from 2 – 16 kHz. The MotorShield sine wave filter offers an added level of protection to your motor with minimal voltage drop.

V1K dV/dt filter
V1K filter

V1K dV/dt filter provides motor protection by limiting voltage spikes to below 1,000 V for applications with leads lengths greater than 100 ft. 1 The V1K filter greatly extends the life of the motor and cable.

Output Line Reactors

KDR line reactors are electrical components that help to protect 6-pulse rectifiers and power conversion devices such as variable frequency drives (VFDs). When used in conjunction with a VFD, a KDR line reactor can help reduce harmonics and protect the drive from harmful voltage spikes.