Dynamic Braking in Variable frequency Drives
Dynamic braking is the method of stopping the motor by dissipation of heat in the resistor. When VFD drives a motor, the motor acts as
Electrical
Current Transformer Secondary Grounding
According to the ANSI guide, the IEEE standard specifies the current transformer grounding practices. The grounding of the current transformer is critical from the perspective of safety
Harmonic Filter Selection
Though all orders of harmonics harm an electrical power system, the 5th and 7th order harmonics are more harmful to electrical networks. One solution to
Transformer Magnetizing Inrush Current
When energizing a power transformer, the transformer draws a magnetizing current. The magnitude of the magnetizing current is several times higher than the rated current
IR Compensation in DC Drive
IR compensation method is used to provide the speed regulation in the DC drive. The DC drive increases the output voltage of the drive to
What is difference between AC and DC Resistance of a conductor?
What is the difference between AC and DC Resistance? The AC resistance is always more than the DC resistance. Let us understand what is the
Harmonics Mitigation Techniques
What is Harmonics? Harmonic is a wave whose frequency is integral multiples of the fundamental frequency. The harmonics are a power quality problem that needs
Why LV Winding Is Placed Next To The Core?
The LV winding is placed next to the core because, with this arrangement, we get the advantage of reduced insulation, low leakage reactance, and easy
What Is Voltage Unbalance?
Definition of Voltage Unbalance as per NEMA: The voltage unbalance is defined as the maximum deviation from the average of three-phase voltage or current, divided
Neutral Conductor Size Selection For Non Linear Loads
Neutral sizing for nonlinear loads: Single-phase non-linear loads like personal computers, electronic ballast, and other electronic equipment generate odd harmonics (i.e., 3rd,5th, 7th, 9th, etc.