Hammond HPS Centurion™ S: SineWave Motor Protection Filter

HPS Centurion™ S SineWave Motor Protection Filter is a robust solution to condition the pulse width modulated (PWM) output of a variable frequency drive (VFD) into a nearly perfect sinusoidal waveform.

Motor drive systems with extended cable lengths may encounter elevated high frequency currents and voltage spikes. HPS Centurion™ S effectively filters out high-frequency components, mitigating both common mode and differential mode noise. The result is enhanced protection for the motor and feeder cable insulation systems as well as reduced wear on the motor bearings. 

Operation Principle

Variable Frequency Drives are found in many commercial and industrial applications including pumps, ventilators, conveyors, compressors, elevators & cranes. The voltage of the VFD consists of a series of pulses with variable width characterized by high rise times.

HPS Centurion™ S SineWave Motor Protection Filters serve as a low-pass filter designed to effectively eliminate the high-frequency components of the VFD output. This protective measure helps safeguard the motor and feeder cables by reducing:

• Voltage Reflection

• Harmonic Distortion

• Bearing Current (that can lead to failure)

• Insulation Stress

• Motor Noise Level

Benefits:

Process Optimization

Increased Reliability

Less Downtime

Increased System Efficiency

Applications:

Designed for applications with long cables up to 15,000 feet (4750 meters) between the VFD and the motor. Typical applications include:

• Oil & Gas (Offshore & Onshore)

• Water & Wastewater Plants

• Mining & Metals

• HVAC

• Chemical

Product Specifications

Electrical

• System Voltage Rating: 380V - 480V or 600V

• Current Rating: 9A to 600A

Technical

• Harmonic Voltage Distortion: Maximum 5%

• Inverter Switching Frequency (Carrier Frequency): 2kHz to 8kHz

• Inverter Operating Frequency (Output Frequency): Maximum 90Hz

• Insertion Loss (Voltage Drop): Maximum 5%

• Maximum Cable Length (Motor): Up to 15,000 feet (4572 meters)

• Insulation System: 115°C rise (180°C insulation) up to 16A, 130°C rise (220°C insulation) above 16A

• Approvals: cULus Listed

Environmental

• Ambient Operating Temperature: Open Style: Up to 50°C; Enclosed Style: Up to 40°C

• Altitude: Up to 1000m (about 3280.84 ft)

• Cooling Method: Convection

• Enclosure Style: Open Style or Type 3R

Power-Flo Technologies is proud to partner with Hammond Power Solutions as it leads the industry in its technical design strength, breadth of product, and manufacturing capabilities. The HPS Centurion™ S SineWave Motor Protection Filter provides an advanced solution for safeguarding motor drive systems, ensuring smooth, reliable operation in demanding industrial and commercial applications. By converting the PWM output of variable frequency drives into near-perfect sinusoidal waveforms, this filter minimizes voltage reflection, harmonic distortion, and insulation stress while protecting motor bearings and cables from wear. Ideal for installations with extended cable lengths, it enhances efficiency, reduces downtime, and extends system longevity. Whether in oil and gas, water treatment, mining, or HVAC systems, the HPS Centurion™ S is a vital component for optimizing performance and ensuring reliable operation in high-demand environments.