Philippine Electrical Code Common Violations – Conductor Box Fill
This is a series of articles where we shall be discussion the common violation on the Philippine Electrical Code. It is the assumption of this series of article that the …
Selection of Variable Frequency Drives – Examples
The equations for calculating the power requirement for VFD has been discussed in Selection of Variable Frequency Drives. Using the equation below, we will provide some examples on selecting a …
Selection of Variable Frequency Drives
The size of a variable frequency drive (VFD) should be based on motor voltage and current and not on the torque or power rating. The voltage and full load current …
Power Factor Correction and Harmonic Resonance: A Risky Combination
Capacitors are intended to solve problems, but if not properly specified, they can also create new ones. Industrial and commercial customers are always examining their monthly electrical usage for cost-saving …
Variable Frequency Drive Cable Length Resonance Frequency
This is a continuation of the article Effect of Cable length on Variable Frequency Drive. Cable Resonance When dealing with Variable Frequency Drives (VFDs), the cable length between the VFD …
Effect of Cable Length on Variable Frequency Drive
Every cable has, apart from its resistance, certain inductance and capacitance. The inductance and capacitance is roughly equally distributed along the cable length. Inductance L and capacitance C in a …