Energy and Power
An overview of Wye and Delta solidly-grounded systems
The solidly-grounded system is the most common system arrangement, and one of the most versatile. The most commonly-used configuration is the solidly-grounded wye, because it will support single-phase phase-to neutral loads. The solidly-grounded wye system arrangement can be shown by… Read more
Nov 26, 2014 | By Edvard Csanyi
Energy and Power
What are the consequences of high harmonic distortion levels?
Just as high blood pressure can create stress and serious problems in the human body, high levels of harmonic distortion can create stress and resultant problems for the utility’s distribution system and the plant’s distribution system, as well as all… Read more
Nov 24, 2014 | By Edvard Csanyi
Energy and Power
Quick estimation of the short circuit current at the end of a feeder
If we consider a branch circuit going away from the point of supply and follow it radially along all the connections and branches, we shall find that further away we are from the transformer, lower is the value of the… Read more
Nov 21, 2014 | By Edvard Csanyi
Energy and Power
Mineral oil-filled distribution transformer as one of the main part of electrical supply system
As you already know, this is the most common type of distribution transformer. It is one of the most important part and can be found on electrical supply systems in every country of the world. Although the insulating oil is… Read more
Nov 19, 2014 | By Edvard Csanyi
Energy and Power
When customer complains on equipment failure caused by overvoltage…
While voltage sags and momentary interruptions cause the most widespread power quality problems, several other power quality disturbances can damage equipment, overheat equipment, disrupt processes, cause data loss, and annoy and upset customers. Often, customers complain of equipment failures, especially… Read more
Nov 17, 2014 | By Edvard Csanyi
Low Voltage
7 practical tips for installing a good measuring system
There are different product families on the market: instruments that measure a single electric parameter (voltage, current, frequency, phase angle cosϕ), generally used in single phase systems, as instrumentation on the machine, and instruments that enable all the electric parameters to… Read more
Nov 14, 2014 | By Edvard Csanyi
Cables
Characteristics of XLPE insulated cables
XLPE is the recognized abbreviation for cross-linked polyethylene. This and other cross-linked synthetic materials, of which EPR (ethylene propylene rubber) is a notable example, are being increasingly used as cable insulants for a wide range of voltages. Polyethylene has good… Read more
Nov 12, 2014 | By Edvard Csanyi
Energy and Power
34 Questions And Answers To Break the Myth About SF6 Gas In Electrical Equipment
There are many published discussions and reports on various aspects of SF6 gas (sulphur hexafluoride) usage in electrical equipment. Most of them are based on facts and researches, but some are not. Let’s try to answer the 34 questions and… Read more
Nov 10, 2014 | By Edvard Csanyi
Energy and Power
Impact of voltage regulation on power system stability
Voltage regulation, by definition, is the percentage change in secondary voltage from no-load to full-load conditions. The regulation is customarily specified at a specific power factor, as the power factor of the load affects the voltage regulation of the device… Read more
Nov 07, 2014 | By Edvard Csanyi
Energy and Power
4 essential qualities of electrical protection
In generating stations, all electrical circuits and machines are subject to faults. A fault is generally caused by the breakdown of insulation between a conductor and ground or between conductors due to a variety of reasons. The result is a… Read more
Nov 03, 2014 | By Edvard Csanyi
Energy and Power
8 most important definitions to quantify load diversity
The most vital, but often the last to be acquired, pieces of information for power system design are the load details. An important concept in load planning is that due to non-coincident timing, some equipment operating at less than rated load, and… Read more
Oct 31, 2014 | By Edvard Csanyi
Energy and Power
Applications and characteristics of differential relays (ANSI 87)
Differential relays generally fall within one of two broad categories: Current-differential and High-impedance differential Current-differential relays are typically used to protect large transformers, generators, and motors. For these devices detection of low level winding-to-ground faults is essential to avoid equipment damage. Current… Read more
Oct 29, 2014 | By Edvard Csanyi
Industrial Automation
Automation Migration Strategy in 3 Phases
Owing to competitive pressures in the marketplace, a company often needs to introduce a new product in the shortest possible time. The easiest and least expensive way to accomplish this objective is to design a manual production method, using a… Read more
Oct 27, 2014 | By Edvard Csanyi
Low Voltage
Guidelines to maintenance of low voltage switchboard
A well-executed maintenance program can provide the following benefits: Longer life of switchboard and fewer replacements; Reduced time on repairs and overhauls, and the option of scheduling them at an opportune time; Fewer failures with unexpected outages; Timely detection of any… Read more
Oct 24, 2014 | By Edvard Csanyi
Energy and Power
What NEC says about design constraints for grounding systems
Several key design constraints for grounding systems from the NEC are as follows. These are paraphrased from the code text: Ø Electrical systems that are grounded must be grounded in such a manner as to limit the voltage imposed by lightning, line… Read more
Oct 22, 2014 | By Edvard Csanyi
