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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 | Edvard
Medium Voltage (MV) switchgear is typically any switchgear over 1000V in the United States (US). Some of the nominal voltage ratings used in the US by power utilities are 2.4-4.16kV,…...
May 07, 2020 | Amar M
Ground testing is often misunderstood by electrical engineers and technicians who do not perform such testing often and regularly. It seems that there are a lot of questions and doubts… Read more
May 06, 2020 | Edvard
The primary purpose of transformer maintenance is to ensure the internal and external parts of the transformer and accessories are kept in good condition and “fit for purpose” and able… Read more
Feb 10, 2020 | Edvard
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…....
Jan 16, 2020 | Miodrag Kokotovic
On-site inspection of the substation transformer usually exposes important condition changes and it initiates various suspicions that need to be investigated in detail. As with any other substation equipment, many… Read more
Nov 11, 2019 | Edvard
Certification of distribution assemblies is defined by international standard IEC 61439-1. This standard provides common rules that are recognized worldwide. Compliance with the standard is certified, depending on the country… Read more
Nov 06, 2019 | Edvard
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…...
Oct 31, 2019 | Miodrag Kokotovic
Once erection is completed, various pre-commissioning checks and tests are performed to ensure the healthiness of the switchyard equipment prior to their energization. This technical article explains various major electrical… Read more
Oct 02, 2019 | Edvard
Purchasing low voltage switchgear is not that easy, it’s not like purchasing a new TV or laptop. You have to be very experienced and deadly serious when specifying and ordering… Read more
Sep 23, 2019 | Edvard
As you already know, substations are the points for controlling the supply of power on different routes by means of various equipment such as power transformers, circuit breakers, CTs/VTs, compensating… Read more
Sep 11, 2019 | Edvard
This technical article presents the shorten version of the report of an on-site assessment at the 33/11 kV Shatt Al Arab substation built in Iraq back in 2005. The assessment… Read more
Jul 17, 2019 | Edvard
Low voltage switchgear can often be very complex and expensive piece of electrical equipment, usually representing one of the most critical and crucial parts of the project. In order to…...
Jun 13, 2019 | Miodrag Kokotovic
Individual tests or routine verifications are intended to check the essential safety aspects of LV assemblies that could be affected by hazards during mounting or possible manufacturing faults. In principle,… Read more
May 08, 2019 | Edvard
This technical article briefly describes seven very important tests you should perform during commissioning of a dry-type transformer. Usually tests are performed in the factory where transformers are produced. The… Read more
Apr 03, 2019 | Edvard