Teguh Hidayat

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LV Surge Arresters In Action Against Lightning

Surge arresters against lightning Description of the installation The site consists of offices (computer hardware, lighting and heating unit), a …

Variable frequency drive configuration, high-efficiency operation, and permanent magnet motors

VFD configuration for permanent magnet alternating current (PMAC) motors and other considerations can lead to optimal system performance, providing …

Comment on Insulation Resistance (IR) Values by Dipankar Sharma

I would like to get a Test result of a 2000KG Lift Installation:1. Insulation Resistance for the whole installation,<br>2. Between Phases,<br>3. Between each …

4 steps to diagnose a potential harmonics related problem

Harmonics related problem If a plant engineer suspects that he might have a harmonics related problem, the following steps can. Read more

Comment on Vector Group of Transformer by s.balasubramanian

Dear Krishna: The 21 being normal tap and having 25 taps is not unusual. the taps specified is dependent on expected voltage variation. Probably your …

Regular Motor Maintenance To Avoid Failure (and Prolong Its Lifespan)

Motor maintenance // A well and carefully designed motor maintenance program, when correctly used, can be summed up as // Preventive maintenance, …

Home Improvement

The real truth behind household power savers

A household power low voltage saving devices has recently received a lot of attention from both consumers and manufacturers. It is generally used in …

Customers

Halaman 10 - Tanya Jawab Al-Islam

<b>Cara Duduk dalam Shalat Dua Rakaat</b><p>Pertanyaan:<br>Assalamu’alaikum wr. wb.<br>Pada shalat dengan bilangan 3 atau 4 rakaat (shalat Maghrib, Isya, Dluhur, dan …

Shalat Dua Rakaat, Duduk Tasyahudnya Tawarruk atau Iftirasy?

<b>Ust. Ahmad Sarwat, Lc., MA</b><p>Wed 20 May 2015 10:26 | Shalat | 31.529 views | Kirim Pertanyaan : tanya@rumahfiqih.com<p><b>Pertanyaan :</b> <br>Assalamualaikum wr …

Cara Duduk Tasyahhud Terakhir Sholat Subuh

HomeFiqh<p>30<p>Pertanyaan : "Manakah yang benar tatkala duduk tasyahhud terakhir sholat subuh, apakah dengan duduk tawarruk (yaitu duduk dengan …

Causes and Impacts Of Power System Disturbances

<b>electrical-engineering-portal.com</b> - To make the study of Power Quality problems useful, the various types of disturbances need to be classified by …

Delta-Star Transformer Connection Overview

Delta-Star Connection of Transformer<p>In this type of connection, the <i>primary connected in delta</i> fashion while the secondary current is connected in <i>star</i>.<p>…

From the Ground Up

Although it's one of the most important aspects of electrical design and installation, grounding continues to be one of the least understood and most …

Do Not Energize Oil-Filled Transformer Without Performing These 15 Tests and Checks!

Obligatory Checklist<p>The following tests and checks should be performed at a minimum to ensure that <b>the transformer is ready to be energized</b>. Do not …

An Example of the Effectiveness of Directional Overcurrent Relays (ANSI 67, 67N)

When fault currents can flow in more than one direction…<p>When fault currents can flow <b>in more than one direction</b> with respect to the load current it is …

9 Recommended Practices for Grounding

Basis for safety and power quality<p>Grounding and bonding are the basis upon which safety and power quality are built. The grounding system provides <b>a</b> …

Electrical Thumb Rules You MUST Follow (Part 1)

Electrical Thumb Rules For:<p>Cable Capacity<p><b>For Cu Wire Current Capacity (Up to 30 Sq.mm) =</b> 6X Size of Wire in Sq.mm<br>Ex. For 2.5 Sq.mm = 6×2.5 = 15 Amp, …

Arduino

Comment on MCB/MCCB/ELCB/RCCB by Pratik Korade

Can we replace MCCB with MCB, where self resetting is required?<br>else give me the solution for self resetting.<br>Current Rating will be 32 A and 64 A, 4 …

Motors: Changing between a 50 and 60Hz supply. - Electric motors & generators engineering FAQ - Eng-Tips

Due to the frequent questions about running motors at "the other frequency" this FAQ was created.<p>This FAQ is directed at other engineers and so will …

12 Transformer Factory Tests Briefly Explained | EEP

Factory tests<p>The remainder of the twelve factory tests are briefly summarized below. The details of the test set connections and formulas of some of …

Arduino

Comparison Between Vacuum and SF6 Circuit Breaker

Medium voltage Distribution system<p>Until recently oil circuit breakers were used in large numbers for Medium voltage Distribution system in many <b>medium</b> …

Engineering

Ferroresonance Occurrence In Power Transformer

Worthy of mention<p>Ferroresonance occurs when <b>line capacitance resonates</b> with the <b>magnetizing reactance of a core</b> while it goes in and out of …

Transformers

4 Essential Features of Transformer On-Load Tap Changer

Done on the HV winding<p>On-load tap changers (or circuit tap changers), as the name suggests, permit tap changing and hence voltage regulation with the …

Vacuums

What is the difference between MCB, MCCB, ELCB, and RCCB

MCB (Miniature Circuit Breaker)<p>Characteristics<p>Rated current not more than 100 A.• <b><br>Trip characteristics</b> normally not adjustable.<br>• Thermal or …

Condition Monitoring of Transformers

Detecting early signs of deterioration<p>It is possible to provide transformers with measuring devices to <i>detect early signs of degradation</i> in various …

Transformers

Power Transformer Maintenance and Field Testing

Operating condition<p>Power transformer is an electric machine with a useful life cycle of some <b>30 years</b>. This doesn’t mean to say that cannot be used …

Protection of Synchronous Generators

Synchronous generators<p>Most power systems tolerate the disconnection of one generating unit, one power transformer, one power line or one busbar …

Current Transformers Selection Guide

Electrical characteristics – primary circuits<p>The primary circuits of the current transformer must withstand the constraints related to the medium …

Arduino

Spreadsheet For Calculating Size Of Motor Pump

Size of the motor pump<p><i>This spreadsheet calculates:</i><p>Pump hydraulic power<br>• Motor-pump shaft power<br>• Pump size and<br>• Motor size<p><b>Some of the input information for</b> …

Arduino