Edvard Csanyi
1576 awesome technical articles
Electrical engineer, programmer and founder of EEP. Highly specialized for design of LV/MV switchgears and LV high power busbar trunking (<6300A) in power substations, commercial buildings and industry facilities. Professional in AutoCAD programming.
Energy and Power
Six differential stator-phase-fault protection (87) for all size generators (you MUST know)
Generally, phase faults at generators rarely occur, but when they do, large fault currents can flow and make the mess. The best protection is differential (ANSI 87), and this type… Read more
Aug 12, 2020 | By Edvard
Electric Motor
Protection of three-phase motors from unbalance (loss of phase and phase rotation)
The most common cause of unbalance for three-phase motors is the loss of phase resulting from an open fuse, circuit breaker, connector, or damaged conductor. Unbalances in other connected loads… Read more
Aug 10, 2020 | By Edvard
Low Voltage
Secondary LV/MV distribution substations in a nutshell (connections and types)
The general method of supplying bulk power to buildings, factories or other complexes is by means of an MV supply, usually at 10 kV, occasionally at 6.6 kV. The installation… Read more
Aug 05, 2020 | By Edvard
Medium Voltage
Installation guidelines for MV metal-enclosed switchgear and controlgear (IEC 62271-200)
What does it mean ‘metal-enclosed switchgear’? Metal-enclosed switchgear and controlgear are generally assembled from type-tested panels. As per IEC 62271-200 metal-enclosed switchgear installations must be designed so that their insulation… Read more
Jul 27, 2020 | By Edvard
Energy and Power
How system earthing keeps you and the network safe
The term “earthing” consists of several functions which only have “utilizing the earth” in common. Before describing the system earthing, it can be of interest to know a bit about… Read more
Jul 22, 2020 | By Edvard
Power Substation
Control system equipment that supervises, protects and controls the substation operation
The control system equipment in a substation is a vital part that supervises, protects and controls the transmission of electrical power. The increasing complexity in the substations of today, together… Read more
Jul 13, 2020 | By Edvard
Protection
Protection coordination practices in distribution systems with distributed generation
Generally, in most of the countries that cover large area, there are three types of distribution systems: urban, suburban, and rural. Each type of them has its own features regarding… Read more
Jul 08, 2020 | By Edvard
High Voltage
How to shrink three-phase AC high voltage substation and optimize cost and space
Nowadays, when every cent is essential when building a substation, it is imperative to optimize each HV equipment without compromising functionality. This technical article deals with a few solutions to… Read more
Jul 06, 2020 | By Edvard
Power Substation
Principles and schemes of busbar and breaker protection in MV/HV/EHV networks
A busbar protection is a protection to protect busbars at short-circuits and earth-faults. In the “childhood” of electricity no separate protection was used for the busbars. Nearby line protection were… Read more
Jun 24, 2020 | By Edvard
Medium Voltage
Primary rated values for medium voltage switchgear often mixed by engineers
It’s not unusual to see that engineers mix terms of primary ratings. If they are not understood well, yes, it’s possible to mix some of them. But it’s essential to… Read more
Jun 22, 2020 | By Edvard
Energy and Power
Electrical insulation testing – Often underestimated until things go really bad
Due to mechanical damage, vibrations, (excessive) heat/cold, moisture/humidity, chemical influences and interactions and aging pinholes, cracks causes moisture and foreign matter to penetrate the surface of the insulation. They create… Read more
Jun 17, 2020 | By Edvard
Power Substation
Protection practice recommendations and relay schemes for transformer, bus and breaker failure
Protective relays are most often applied with other protective and auxiliary relays as a system rather than individually. The following basic scheme descriptions apply to electromechanical, static, and microprocessor relay… Read more
Jun 06, 2020 | By Edvard
Protection
The impact of interconnection transformer on the protection of the utility system with DG
Interconnection transformers are used to interface a distribution generation (DG) unit with an existing power system, and to provide the necessary isolation. Utilities recommend using an interconnection transformer to eliminate… Read more
Jun 03, 2020 | By Edvard
Energy and Power
Planning and installation of the low voltage switchgear – The devil is in the detail!
To be honest with you, the planning and installation of LV switchgear is a damn complicated job. But you knew that :) There are dozen of detail where you can… Read more
May 24, 2020 | By Edvard
Electrical Lectures
Transformer connections you are not allowed to forget
Transformers used in power substations or a power system could be a bank of three single-phase transformers connected in either star/delta or star/star etc., or could be a single three-phase… Read more
May 20, 2020 | By Edvard
