STRAY VOLTAGE – HOW DOES IT ORIGINATE?
Stray voltage is defined by IEEE as “A voltage resulting from the normal delivery and/or use of electricity (usually smaller than…
WHY DO HIGH VOLTAGE CABLES NEED TERMINATION?
Modern high and medium voltage cables [HV and MV] are precisely engineered components key to safe and efficient distribution of…
WHAT IS GHOST OR PHANTOM VOLTAGE ?
Ghost or Phantom voltage is the voltage that is capacitively coupled from an energized conductor to a nearby conductor that…
POWER FACTOR IMPROVEMENT AND TRANSFORMER LOADING
POWER FACTOR BASICS Power factor for an AC circuit operating with sinusoidal waveform is defined as the cosine angle between…
How to Parallel Current Transformers?
Current Transformer [CT] is used to obtain replica of primary current for use in metering or relaying applications. Though vast…
POWER QUALITY CHECK USING MULTIMETER
This article discusses methods to measure basic power (Voltage) quality parameters using a multimeter. Using any advanced digital multimeter (similar…
Adjusting Current Transformer Ratio
Current Transformer [CT] ratio is specified for one turn or one pass of primary conductor through the window of CT.…
COLD LOAD PICKUP IN POWER DISTRIBUTION NETWORKS
When power distribution circuit is re-energized following an extended power outage, new power demand can be higher than pre-outage power…
Common Impedance Coupling in Power Systems
Common impedance coupling can cause a variety of issues in communication and control applications. Common impedance coupling occurs when two…
MULTIPOINT 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.…