SINGLE POINT GROUNDING IN POWER SYSTEMS
Power system grounds are usually single-point grounded and is most effective at low frequency from DC to about 20 kHz.…
Ground wire vs Ground Strap for high frequency grounding
Grounding or earthing of equipment containing high frequency noise sources require that connection be done with a low impedance path.…
HIGH IMPEDANCE IN EARTH GROUND WIRE DUE TO MAGNETIC FIELD
High impedance in earth ground wires can be caused due to commonly known reasons such as loose connection, having a…
CHARGING CURRENT IN HIGH VOLTAGE CABLE
Power cables used for transmission and distribution of power have distributed capacitance. Medium and high voltage power cable consists of…
SURGE IMPEDANCE LOADING OF TRANSMISSION LINE
Surge impedance loading [SIL] of a transmission system is the power delivered by a lossless line to a purely resistive…
Difference between Control Power Transformer and Potential Transformer
Control Power Transformer Control power transformers [CPT] are transformers designed to provide control voltage to contactors, starter control panels, solenoids,…
NEUTRAL CURRENT TRANSFORMER APPLIED WITH ELECTRONIC TRIP UNITS
Neutral Current Transformer [NCT] is required for residual ground fault detection and power metering in three-phase four wires systems. Residual…
INCORRECT MOTOR CONTROL CIRCUIT WIRING
Motor control circuits are typically fed from motor phase wiring by tapping phase circuits with control power transformer. This control…
Non-Shielded Medium Voltage Cable
National Electric Code [NEC] 2005 edition and later editions requires shielded medium voltage [MV] cables for all circuits operating above…
Zero Sequence Current Transformer
Zero Sequence Current Transformer [ZSCT] also known as Core Balance Current Transformer [CBCT] is a type of current transformer [CT]…