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Author Archive for: Miodrag Kokotovic

Miodrag Kokotovic

24 awesome technical articles.

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Graduated from Faculty of Electrical Engineering, within University of Belgrade, in the field of electrical power systems. Expert in electrical part of tender preparation, design, procurement, construction and commissioning of treatment plants and pumping stations, electrical power quality and energy management.

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Mastering single line and wiring diagrams: Using circuit breaker for MV power factor correction

Within this article, custom made cubicle intended for supply and protection of MV reactive power compensation block, will be analyzed. Technical characteristics of major electrical components, together with three line…...

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Apr 09, 2020 | Miodrag Kokotovic

Mastering single line and wiring diagrams: Using circuit breaker for MV power factor correction

Mastering single line and wiring diagrams: MV earth fault protection

This technical article continues the series of articles dedicated to mastering single line and wiring diagrams of medium voltage switchgear. This time, the subject is the principle, and realization of…...

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Mar 26, 2020 | Miodrag Kokotovic

Mastering single line and wiring diagrams: MV earth fault protection

Mastering single line and wiring diagrams: Interlocking between MV cubicles

There are numerous variations of MV switchgear topology, measurement, and control logic. However, there are also some basic rules related to these aspects which may be frequently seen in practice,…...

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Mar 12, 2020 | Miodrag Kokotovic

Mastering single line and wiring diagrams: Interlocking between MV cubicles

When can we say that earthing arrangement is safe for people (confusions in practice)

This article will analyse some of the most important safety issues related to design and use of LV electrical installations. Besides explanation of relevant terms in this field defined by…...

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Feb 28, 2020 | Miodrag Kokotovic

When can we say that earthing arrangement is safe for people (confusions in practice)

Design and control considerations for an example of the waste water pumping station

Waste water pumping stations are very common application examples of three phase induction motor. There are numerous varieties of power supply and control logic, depending on exact conditions in the…...

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Feb 14, 2020 | Miodrag Kokotovic

Design and control considerations for an example of the waste water pumping station

How does low voltage protection unit work and what’s the most important to understand

If we are talking about LV applications, protection (or trip) unit is functional part of circuit breaker, and in most cases, they are physically integrated in the same housing as…...

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Jan 23, 2020 | Miodrag Kokotovic

How does low voltage protection unit work

How to avoid common mistakes during wiring and startup of power factor correction (PFC) cubicle

Power factor correction (PFC) and reactive power compensation (RPC) are often used as synonyms in practice. Although they are similar and mutually dependent terms, they don’t represent the same thing…....

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Jan 16, 2020 | Miodrag Kokotovic

How to avoid common mistakes during wiring and startup of power factor correction (PFC) cubicle

Soft starter for potable water well pump (wiring diagram, troubleshooting example)

This article will analyse a real example of electrical switchboard for potable water well pump, containing soft starter as one of major components. Besides explanation of wiring diagram and working…...

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Dec 27, 2019 | Miodrag Kokotovic

Wiring diagram and troubleshooting the soft starter for potable water well pump

Where and why you should use thyristor switched reactive power compensation

Various aspects of reactive power compensation problems have already been mentioned in previous articles. However, because of consistency of this article, we will remind ourselves briefly on basic terms and…...

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Dec 12, 2019 | Miodrag Kokotovic

Why you should use advanced thyristor-switched reactive power compensation

How can a PLC and VFD be used for pump control (power and control circuits)

For the last several decades, every engineering task related to process control is realized by the use of PLC (Programmable Logic Controller). If we are talking about induction motor control,…...

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Nov 27, 2019 | Miodrag Kokotovic

How can a PLC and VFD be used for pump control (power and control circuits)

The wiring diagram and physical layout of the equipment inside the motor control centre

This article will provide a description of most important equipment and working principle of a real case motor control centre (MCC). That is an usual name for a switchboard with…...

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Nov 14, 2019 | Miodrag Kokotovic

The wiring diagram and physical layout of the equipment inside the motor control centre

Lessons I learned during the start-up of an MV switchgear

In the world of electrical engineering, a term start-up assumes all works which are necessary to be done for putting in operation already tested switchgear, as close as possible installed…...

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Oct 31, 2019 | Miodrag Kokotovic

Lessons I learned during the start-up of an MV switchgear

Automatic transfer switch between three power sources (analysis of schemes)

When a switchboard can be supplied from two or more different sources, transfer between those sources can be done manually or automatically. This kind of configuration is usually designed when…...

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Oct 03, 2019 | Miodrag Kokotovic

Automatic transfer switch between three power sources (analysis of schemes)

Why we find temperature so important everywhere in electrical engineering?

The purpose of this article is to underline and illustrate the importance of temperature for various aspects of electrical engineering. This is one of the crucial engineering issues from the…...

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Sep 20, 2019 | Miodrag Kokotovic

Copper busbars bolted connections

Field devices and signals used for LV SCADA operations

At low voltage level, SCADA applications are usually used for process control and monitoring of equipment. Furthermore, incoming circuit breakers or switch disconnectors inside large LV switchboards may also be…...

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Sep 05, 2019 | Miodrag Kokotovic

Field devices and signals used for LV SCADA operations


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