MCC Circuit Featuring Auto Re-Closure Relay Functionality
An MCC circuit of a motor could be based on the Direct Online Starter (DOL) or Star Delta Starter which has something to do with the requirement of the power system in an industry. But it could have additional logics…...
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Apr 14, 2025 | By Umer Nasir

Star-delta starting used with large horsepower motors
Star-delta starting is frequently employed with high horsepower motors to mitigate inrush current during the start-up stage and to reduce starting torque. Star-delta starting involves initially connecting the motor stator windings in a star configuration during the motor startup phase,… Read more
Oct 16, 2024 | By Edvard Csanyi

The analysis of relay control systems: Electrical schematics with latch, step and lockout relays
To be honest, expertise in relay systems is fundamental for comprehension and creativity in circuits design. From bi-stable relays that maintain their states without continuous power to step relays facilitating incremental changes, and lockout relays guarding against unauthorized reenergization, each…...
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Feb 26, 2024 | By Muhammad Kashif

Mastering schematic drawings: Analyzing seal-in contacts in motor control circuits
In the domain of electrical engineering, seal-in contacts stand as pivotal components in control circuits, ensuring the sustained operation of electrical devices beyond the initial activation. These mechanisms play a critical role in maintaining the energized state of circuit elements,…...
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Feb 12, 2024 | By Muhammad Kashif

The essentials of pumping, pump speed and flow rate control that engineers MUST know
Around twenty five percent of the energy that is consumed by electric motors worldwide is accounted for by pumping systems, and certain industrial facilities use anywhere from twenty-five to fifty percent of the total electrical energy available. There are significant… Read more
Mar 13, 2023 | By Edvard Csanyi

The art of achieving synchronous motor transient stability (especially in weak grids)
Since the subject of this article is somewhat not-that-easy to understand, I suggest starting with the basics of the synchronous motor. In the synchronous motor, the basic magnetic field is obtained by direct current excitation rather than through the air…...
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Feb 06, 2023 | By Salem Alshahrani

Six different ways to start a medium-voltage motor you should know about
The AC induction motor is a key component of the modern world economy. These motors are used in industrial facilities all over the world to power the equipment that boosts productivity and efficiency. However, during motor start-up, many industrial activities… Read more
Jan 02, 2023 | By Edvard Csanyi

How should facilities optimize their power consumption due to the hiking energy prices?
Nowadays, the enormous energy consumption worldwide has taken a downturn due to the hiking energy prices. Whether it’s gas, oil, or coal, the rising costs forced many facilities worldwide to cut their energy expenses. This is a good moment to… Read more
Dec 05, 2022 | By Edvard Csanyi

Do you know what reactive power compensation is? If not, keep reading, it’s important.
When reactive power devices, whether capacitive or inductive, are purposefully added to a power network in order to produce a specific outcome, this is referred to as compensation. It’s as simple as that. This could involve greater transmission capacity, enhanced… Read more
Oct 24, 2022 | By Edvard Csanyi

Main and auxiliary circuit diagrams of switching pole-changing three-phase motors
This technical article is dedicated to the main and auxiliary circuit diagrams of switching three-phase motors. We’ll now discuss a little more complicated schematics than the previous article. We’ll cover seven schematics of switching pole-changing three-phase induction motors with one…...
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May 23, 2022 | By Edvard Csanyi

Main and auxiliary circuit diagrams of switching three-phase motors via contactor and directly
This technical article will try to shed some light on the main and auxiliary circuit diagrams of switching three-phase motors via contactor and switching directly. We’ll cover some fundamental schematics with an old-school explanations and logics on how they work…. Read more
May 16, 2022 | By Edvard Csanyi

Eight most damaging overvoltages in industrial systems (root causes and prevention)
Electric insulation in energized systems is continuously under stress. Electric systems are subject to disturbances of many types which unavoidably produce overvoltages. However, the application engineer has at his command many system design principles which will greatly curb the magnitude… Read more
Dec 20, 2021 | By Edvard Csanyi

Never let an electric motor drop dead. Learn how to listen and read the motor’s soul.
Like any other machine, electric motors are vulnerable to faults, which might lead to catastrophic failure of the machine in the long run if left unmonitored. In this technical article, I will try to shed some light on the possible…...
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Nov 29, 2021 | By Rahmatullah Alam

Six methods to control the flow of harmonic currents and decrease harmonic distortion limits
The first technique to control harmonic-related problems in the industry involved substantial use of single-tuned filters to offer a low-impedance path to harmonic currents. Interestingly, it is not difficult to find harmonic-producing loads in the megavolt-ampere range in the industry… Read more
Jul 19, 2021 | By Edvard Csanyi

Guidelines for selecting the proper Variable Frequency Drive (VFD) for motor applications
This article addresses the Variable Frequency Drive (VFD) concept in several aspects that matter the most in selecting the proper VFD for applications. One of the important factors is the control type required for a given application since it is…...
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Jun 28, 2021 | By Salem Alshahrani
