4 Low Voltage Switchboard Partitioning Forms Defined By IEC 61439-2
There are 4 main reasons for partitioning a switchboard. To protect persons against direct contact with dangerous parts. The minimum degree of protection must be IPXXB. To protect the switchboard against the penetration… Read more
Mar 20, 2015 | By Edvard Csanyi
Eleven major causes of power system failures
To gain a broader understanding of power system reliability, it is necessary to understand the root causes of system faults and system failures. A description of major failure modes is… Read more
Mar 18, 2015 | By Edvard Csanyi
Should We Blame Supplier For Voltage Dips and Transients?
Voltage dips and transients are usually blamed on the supplier, but this is often unfair. There are many potential on-site causes; for example, starting of heavy loads may cause voltage… Read more
Mar 11, 2015 | By Edvard Csanyi
Why it’s important to know which type of power factor correction to use
It’s important to understand where the capacitors are to be installed for a better exploitation of such advantages. There are no general rules applicable to every type of installation and, in… Read more
Mar 09, 2015 | By Edvard Csanyi
9 Recommended Practices for Grounding
Grounding and bonding are the basis upon which safety and power quality are built. The grounding system provides a low-impedance path for fault current and limits the voltage rise on… Read more
Mar 06, 2015 | By Edvard Csanyi
Impulse withstand voltage test performed on assemblies
Only optional in the past, the impulse test which allow defining the rated impulse withstand voltage Uimp, is now a necessity thus demonstrating the strategy of the Standards directed to… Read more
Mar 02, 2015 | By Edvard Csanyi
6 recommended practices for increasing the power quality
Power quality concerns have traditionally focused on harmonics, which are generated by nonlinear loads, although there are many other concerns regarding isolating sensitive loads from transient disturbances, uneven ground potentials, or phase… Read more
Feb 27, 2015 | By Edvard Csanyi
4 practical approaches to minimize voltage drop problems
The NEC states in an Informational Note that a maximum voltage drop of 3% for branch circuit conductors, and 5% for feeder and branch circuit conductors together, will provide reasonable… Read more
Feb 25, 2015 | By Edvard Csanyi
Smart Load Management Strategies To Save Energy
As part of their drive towards synchronizing the consumption and production of electrical energy over the long term, energy distribution companies tailor their rates to encourage consumers to reduce their… Read more
Feb 18, 2015 | By Edvard Csanyi
How can I select the right capacitors for my specific application needs?
Once you’ve decided that your facility can benefit from power factor correction, you’ll need to choose the optimum type, size, and number of capacitors for your plant. There are two… Read more
Feb 13, 2015 | By Edvard Csanyi
A real life analogy of the jurisdiction of the protection relay
Formally, a relay is a logical element which processes the inputs (mostly voltages and currents) from the system/apparatus and issues a trip decision if a fault within the protection relay‘s… Read more
Feb 09, 2015 | By Edvard Csanyi
Emergency Lighting Power Supply in Data Center
Lighting is defined as emergency lighting when it is intended for operation when standard lighting fails. Emergency lighting must be powered by an independent energy source (typically a central power… Read more
Feb 06, 2015 | By Edvard Csanyi
Voltage Imbalance Protection of Synchronous Generator (ANSI Code 60)
In an apparatus protection perspective, generators constitute a special class of power network equipment because faults are very rare, but can be highly destructive and therefore very costly when they… Read more
Feb 04, 2015 | By Edvard Csanyi
Calculating Max. Demand Kilovolt-Amperes and Required Cable Current Rating
A building site is to have the following electrical equipment available for use: Tower crane, electric motors totalling 75 kW at 415 V; Sump pump, 5 kW at 240 V;… Read more
Feb 02, 2015 | By Edvard Csanyi
Important generator set (genset) rating considerations
A generator set (genset) consists of an engine and a generator and it is best to consider each of them as a system. Individually, each has unique characteristics, but together these qualities have a… Read more
Jan 30, 2015 | By Edvard Csanyi