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Practical checks for motor selection on AC adjustable speed drive systems
Motor selection for AC ASD Important checks to consider in the motor selection for AC adjustable speed drive system: Determine. Read more
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Detailed calculation of currents and power according to the type of load
Calculation of currents & power Currents and power analysis are key factors in any design or redesign of an installation. Read more
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How a three-phase power transformer responds to harmonics
3-phase transformer and harmonics The way in which a three-phase transformer responds to harmonics depends on the connection configuration used.. Read more
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5 good examples of locking out HV/MV/LV structures and equipment
Locking and safety reasons In all cases the choice of locks and safety positions requires prior analysis of the locking. Read more
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Guidelines for high potential (Hi-Pot) DC testing of medium voltage cables
High potential “Hi-Pot” DC testing This technical article provides general guidelines for high potential “Hi-Pot” DC testing of MV power. Read more
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Do you know what ground potential rise is? It’s really important.
Ground potential rise events First of all, ground potential rise is very important and very dangerous event. The grounding engineer. Read more
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Measurement of N–PE loop resistance in TN, TT and IT systems
N–PE loop resistance Up-to-date test instruments, with built in modern electronics, can measure loop resistance even between the neutral N. Read more
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Basic electrical design of a PLC panel (Wiring diagrams)
Building the PLC panel It is uncommon for engineers to build their own PLC panel designs (but not impossible of. Read more
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Performing power factor test on dry-type transformer during commissioning
Power factor test The power factor test is a maintenance test used to determine the insulation system dielectric power loss. Read more
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Voltage drop calculation methods with examples explained in details
Voltage drop considerations The first consideration for voltage drop is that under the steady-state conditions of normal load, the voltage. Read more
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The basics of synchronous machines in power distribution networks
The basics of synchronous machines Synchronous machines can be used as generators or motors. They are of 3-phase construction, even. Read more
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Never underestimate electrostatic discharge (ESD) while working with data...
Introduction to ESD Let’s start with basics you probably already know, but nevertheless. It’s important to explain the basics first.. Read more
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3 performance factors you must consider when sizing batteries
Sizing batteries correctly Batteries need to be sized correctly to be able to feed the required load for the required. Read more
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Why overmotoring an application is not such a good idea
Bad practice In many instances, the practice has been to overmotor an application, i.e., to select a higher-horsepower motor than. Read more
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PLC power supply and safety (emergency) circuits requirements
Introduction The source for a PLC power supply is generally single-phase and 120 or 240 VAC. If the controller is. Read more
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What is the complex power and how it figures in power analysis
Power absorbed by a given load Considerable effort has been expended over the years to express power relations as simply. Read more
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Installation, protection and connection of capacitor banks
Installation options for capacitor banks In an low voltage electrical installation, capacitor banks can be installed at three different levels:. Read more
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Generator synchronizing check protective function (ANSI 25)
Synchronizing operations One of the easiest way to damage a generator is to synchronize or parallel out of phase with. Read more
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The analysis of four network schemes in terms of reliability and protection
Defining network requirements Before sizing an electric network, the single-line diagram of the electric network must be defined on the. Read more
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Top six solutions to achieve a high level of energy efficiency in buildings
Efficiently consumed energy Energy efficiency in commercial buildings involves providing a given level of performance, cost, quality, availability, and comfort. Read more
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