Energy and Power

Medium Voltage

Energy and Power

Energy and Power

## Six differential stator-phase-fault protection (87) for all size generators (you MUST know)

Study specialized technical articles, papers & courses in low/high voltage areas. Save 50% on all courses with the Enterprise Plan.

Energy and Power

# Detailed Overview of Power System Disturbances (Causes and Impacts)

To make the study of Power Quality problems useful, the various types of disturbances need to be classified by magnitude and duration. This is especially important for manufacturers and users of… Read more

Apr 17, 2015 | By Edvard

Electrical Lectures

# Back To School – Let’s Calculate Current I3

Referring to the following circuit, calculate direct current I3: Using Kirchhoff’s laws; Using nodal analysis; Applying Thévenin’s theorem at nodes A and B. – KCL stands for Kirchhoff’s Current Law… Read more

Apr 10, 2015 | By Edvard

Energy and Power

# Good voltage regulation and justified power factor correction

Power factor correction and voltage regulation are closely related. In many cases, the desired voltage regulation is costly to obtain. Larger or paralleled conductors to reduce voltage drop under load… Read more

Apr 01, 2015 | By Edvard

Energy and Power

# Six energy efficiency improvement opportunities in fan systems

Efficiencies of fan systems vary considerably across impeller types. The average energy saving potential in these systems in the U.S. manufacturing industry is estimated at 6%. For optimal savings and… Read more

Mar 27, 2015 | By Edvard

Energy and Power

# Many engineers advocate the use of multiple-transfer switches

Automatic transfer switches are primarily used for emergency and standby power generation systems. These transfer switches may incorporate overcurrent protection and are designed and applied in accordance with the NEC,… Read more

Mar 23, 2015 | By Edvard

Energy and Power

# 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

Energy and Power

# 11 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

Electronics

# 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

Energy and Power

# 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

Energy and Power

# 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

Energy and Power

# 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

Energy and Power

# 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

Cables

# 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

Energy and Power

# 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

Energy and Power

# 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

### Learn to Design Power Systems

Learn to design LV/MV/HV power systems through professional video courses. Lifetime access. Enjoy learning!